TM 9-1750E Guiberson Diesel T1400 Engine, Series 3, For Medium Tanks M3 and M4, Etc 1942

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~ J U L 10 1943

TECHNICAL MANUALNo . 9-1750E

TM 9-1750E

W A R DEPARTMENT, ORDNANCE OFFICEWash ing ton , September 25, 1942

O R D N A N C E M A I N T E N A N C EG u i b e r s o n D i e s e l T 1 4 0 0 E n g i n e , S e r i e s 3 ,

f or Medium T a n k s M3 a n d M4 a n dR e l a t e d G u n Motor C a r r i a g e s !

Prepared under the direction of theChief of Ordnance

CONTENTSParagraphs Pogef

S E C T I O N I . General description andspecifications .................. 1-6 3-22

II. Trouble shooting ................. 7-10 23-27III. Disassembly of engine. ........... 11-56 28-51IV. The inspection .................. 57-87 52-111V. Repair of engine .................88-106 112-124

VI. Assembly of engine............... 07-156 125-169VII. Accessories ............. ....... 57-176 170-204

VIII. Preparing the engine for storage. . . 17 7 205-206IX. Removalof engine from shippingcrate ......................... 78^179 207-214X. Fits and clearances. ............ ^ISO-ISI 215-222

XI. Service assembly and overhaul tools 182- 223-235XII. References .................-I---1.83-185^ -236

I N D E X ......................................-\'>/... ......... 237


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TM 9-1750ET

ORDNANCE MAINTENANCEGUIBERSON DIESEL T1400 ENGINE, SERIES 3

RA PD 116BS

figure 1Fro n t ofEn g in e

Fig u r e 2toarofEn g in e2

R A PD 11689


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TM 9-1750E1-2

Sect ion I

GENERAL DESCRIPTION AND SPECIFICATIONSParagraphScope ..................................................... 1

Description ................................................ 2Fuel system ............................................... 3Tabulated data ............................................ 4Reference to operationmanuals.............................. 5Echelon breakdown of maintenance operations.... .......... 61. SCOPE.

This manual is published fo r the information and guidance of ordnance maintenance personnel. It contains detailed instructions forinspection, disassembly, assembly, maintenance and repair of theGuiberson Diesel Engine, Model T1400, Series 3. S ectio n XII of thismanual lists all Standard Nomenclature Lists, Technical Manuals andother publications pertinent to the materiel described herein .2. DESCRIPTION.

a. General Description.(1) The Guiberson Diesel Engine, Model T1400, is a nine-cylinderradial engine, air-cooled, and using fuel oil fo r fuel. C ooling fins aroundthe cylinder heads and barrels are provided fo r heat radiation, andbaffles direct the flow of air to the cylinders.(2) The engine is mounted vertically in the tank w ith the intake

and exhaustmanifolds to the rear, with the cowling and flywheel facingthe front of the tank. Therefore, the manifold side of the engine isreferred to as the rear of the engine, and the cowling and flywheel sideof the engine is referred to as the front.(3) The cylinders fire counterclockwise, facing the front of theengine, the firing order being 1-3-5-7-9-2-4-6-8. N o. 1 cylinder is at thetop of the engine.(4) A ir is drawn into the intake manifold through a vertical air hornand air cleaner at each side of the engine. The air is compressed in the

combustion chamber to a ratio of 14 to 1 . C ompression raises the temperature of the air sufficiently to ignite the fuel oil, w hen it is injected.(5) Fuel is pumped into the fuel channel of the engine by a fuelsupply pump. However, individual injection pumps, at each cylinderrbuild up pressure that forces the fuel into thecylinders. These injectionpumps also measure the correct amount of fuel which is forced into thecombustion chamber through a fuel injector at each cylinder.(6) The operation of the fuel injection pumps is controlled by afuel control assembly at the rear of the engine. The injection pump


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TM 9-1750E2

ORDNANCE MAINTENANCEGUIBERSON DIESEL T14OO ENGINE, SERIES 3plungers ride on the levers of the fuel control lever assembly. Theselevers move up and down, actuated by the lobes of the fuel cam ringover which they operate, to move the injection pump plungers up anddown. The position of the plunger on the lever determines the lengthof stroke, and amount of fuel injected.

(7) Valve tappets operate on the valve cam in the "nose" or frontcrankcase section. The intake valve tappets operate over the lobes ofone cam, while the exhaust valve tappets are operated by a differentcam.(8) A decompression plate is also located in the front crankcasesection. When the decompression lever in the tank is set at "decompression," theexhaust valve tappets rest on the lobes ofthe decompressionplate and are heldopen.(9) Lubrication of moving parts of the engine is accomplished byoil which is forced through drilled passages and by oil splash createdby moving parts within the crankcase. Oil is pumped from an externaltankand circulated through the engine. Before itis returnedto the tankit is passed throughoil coolers to reducethetemperature.(10) A complete description of the. various parts of the enginefollows:

CRANKCASEFRONT SECTIONGU-53-YA-40

GUIDE, VALVETAP P E TGU-52-Y-121

TAP P E T , VALVEGU-52-Y-122

P LATE,DECOMPRESSIONGU-52-Y-94

_ RA PD 11690Figure 3TheCrankcase Front Section and Decom p r e ss ion P/ote

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TM 9-1750E2GENERA L DESCRIPTIO N AND SPECIFICATIONS

b. Detailed Description.(1 ) C R A N K C A S E .(a) The crankcase is in foursections. The front and rear center sections are bolted together at the center line of the cylinders, and carrythe cylinder barrel mounting studs.(b) The rear center section is in turn bolted to the rear mountingsection of the crankcase. Mounting brackets of the rear mounting crank-case section boltto the engine mounting beam.(c) The front crankcase section contains the valve tappets and

guides, and the decompression plate (fig. 3), and is bolted to the frontcenter crankcase section.(d) Hardened bearing liners on which the crankshaft bearings operate are pressed into the two center sections of the case. Fuel injectionpumps are in the rear mounting section. The fuel channel is bored inthe rear mounting section between the fuel pump bosses.

(2) C Y L INDER S. Heat-treated aluminum alloy cylinder heads arescrewed and shrunk onto forged steel barrels. Cooling fins are providedby an aluminum alloy muff or sleeve on the barrels and cooling 1 finsare also provided on the cylinder heads to provide ample radiationsurface. Cylinder bores are bored, ground and honed to mirror finishand held within extremely close limits. Valve seats made of specialmaterials are shrunk in the cylinder heads. The rocker boxes are castintegral with theheads.

(3) PIS T O NS (fig. 54). Aluminum alloy pistons of special heat-resisting quality have three compression rings, two oil rings above thepiston pin and one scraper ring in the skirt. The two oil rings are inone gro ove. The pistons are forged. The full floating piston pins havealuminum alloy plugs for the piston pin retaining device.(4) M A S T E R R O D (fig. 33). The master rod is an "I" section offorged steel, heat-treated, machined and polished. The crankpin bearingis an integral type, precision bored, steel-backed, lead-bronze bushing.The link rods operate on knuckle pins in the master rod. These aresecured in the master rod by retaining rings. The master rod is drilledto provide pressure lubrication to the knuckle pin bushings.(5) L I N K R O D S . Each link rod is an "I" section, completely machined and polished. The knuckle pin bushings and piston pin bushingsare pressed into the link rods. A ll bearings are jig-bored for alinement

and center distance.(6) C R A N K S H A F T (fig. 33). The front and rear crankshafts are heat-treated steel forgings drilled throughout for lightness and plugged toform forced feed oil passages. The shaft is of the one-throw design andis completely machined. The crankpin is carburized for hardness andis accurately ground to size. The crankpin step is accurately groundand fitted to a ground hole in the rear cheek, where it is clamped in place. A floating counterweight is used on the rear crankshaft. Theshaft is supported by two roller bearings referred to as main bearings,


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TM 9-1750E2ORDNANCE MAINTENANCE

GUIBERSON DIESEL T14OO ENGINE, SERIES 3

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TM 9-1750E2GENERAL DESCRIPTION AND SPECIFICATIONS

and one ball thrust bearing at the forward end. The flywheel end ofthe shaft is machined with a spline (modified aeronauticalSAE 40),modified in length for the flywheel hub.

(7 ) F U E L C O N T R O L LEVER A S S E M B L Y (figs. 1 3 and 70).(a) Fuel control levers are mounted so that the rollers in the ends

of the levers operate on a fuel cam ring. The levers move up and downas the rollers contact the lobes of the fuel cam ring.(b) A throttle control segment gear moves the fuel control lever

assembly as the throttle is operated.(c) The fuel injection pump plungers ride on the levers of the fuel

control lever assembly (fig. 13). A s the levers move up and down overthe lobes of the fuel cam ring, the plungers move up and down tooperate the fuel injection pumps.(d) Turning the fuel control lever assembly by means of the throttlecontrol segment gear and throttle gear, changes the location of theinjection pump plungers on the fuel control levers. This determines the

length of the plunger stroke and the amount of fuel injected.(8) F U E L C AM R I N G AN D D RIV E G EA R (fig. 4). The fuel cam ring

is of forged steel heat-treated and machined all over. It is secured tothe fuel cam drive gear by six bolts. Slots in the drive gear permit thefuel cam ring to be turned relative to the drive gear for fuel timing themotor. A fuel cam adjusting eccentric extends through the drive gearfor adjusting the fuel cam ring when the securing nuts are loosened.

(9) V ALV E CAM. The valve cam is of completely machined forgedsteel, and the cam track and gear are hardened. The intake and exhaustcams are on different planes, with four lobes on each cam. The camring is carried on a bronze bushing. The cam drive gear is integral withthe cam -ring, turning y$ engine speed in the direction opposite to thecrankshaft rotation. The cam gear meshes with an intermediate gearoperated by the crankshaft gear.

(1 0) V A L V E OPERATING MECHANIS M (fig. 3).(a) The tappets, which operate the valves, have rollers which ride

on the valve cam ring. The tappets fit into heat-treated steel guideswhich have a threaded aluminum adapter at the top. The push rodhousing nut screws onto this threaded adapter, sealing out dirt.(b) The push rods, which set on the valve tappets and operate thevalve rockers, are made of light steel tubing with pressed-in ball ends,hardened and ground. The push rod' is fully enclosed. The top end fitsinto a socket in the rockers. The inner end of the push rod (markedwith an arrow) has a ball check valve that lets lubricating oil into thepush rod, but keeps it from draining out of the push rod. Each rockeris mounted on a bearing. The rocker mechanism is enclosed.(c) The push, rod housing is a tube flanged at one end. The pushrod housing nipple in the rocker box receives the straight end of the


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GUIBERSON DIESEL T14OO ENGINE, SERIES 3GOVERNOR LEVER, THROTTLE CONTROL

GU-14-YA-182 SHAFT -GU-53-Y-164A" ~' VALVE, OIL P RESSURERELIEF-GU-51-YA-150

P U M P , FUEL S U P P LYGU-14M-YA-198 CASE, ACCESSORYGU-52-Y-143

P U M P , OILGU-53-YA-132A RA PD 11692F i g u r e 5 T h e A c c e s s o r y Ca s e w i t h A c c e s s o r ies M o u n t e d

push rod tube. Push rod housing nuts retain a packing ring whichsecurely seals the push rod housing assembly from dust or oil leaks.

(11) A C C E S S O R Y C A S E (fig. 5). The accessory case is an aluminumalloy casting, attached to the rear mounting section of the crankcaseand contains the entire gear train. Standard SAE flange mountings areprovided for the starter, generator and fuel supply pump. The accessory case also carries the oil pump, oil pressure relief valve, throttlecontrol shaft, outlet oil connections and case vent holes and has amounting for the governor. Directly above the starter flange is a smallremovable inspection plate to permit adjustment of the fuel cam ring.Drilled ducts are provided for the oil from the lubricating oil pressurepump to the crankshaft and intermediate and idler gear bushings. Acored duct is incorporated for the bypassed oil and the oil from thescavenging pump.(12) I N T A K E M A N I F O L D (fig. 6). The intake manifold is composedof the intake manifold, intake elbows and flanges, connecting hoses, andclamps. Intake elbows connect the manifold with each cylinder head.

(13) E X H A U S T M A N I F O L D (fig. 7). The exhaust manifold is composed of two halves, one for the right side and one for the left side ofthe engine. Branch pipes connect the exhaust ports with the exhaustmanifold and are clamped to theexhaust manifold. The outletpipe sizeis ample for each half of the manifold.

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F igun 6-Th* hr fd t * Mani fo ldRA PD 11693

RA PD 11694Figure 7The Ex h au s t Mani fo ld

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TM 9-1750E2

ORDNANCE MAINTENANCEGUIBERSON DIESEL T14OO ENGINE, SERIES 3

HA PD 114W

F igu re 8Lubr i ca t ing Oil Diagram10


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TM 9-1750E2

GENERA L DESCRIPTION AND SPECIFICATIONS(14) L U B R I C A T I N G O IL S Y S T E M (figs. 8 and 9).(a) When it is necessary to change the gradeof oil, drain the entireoil system, including the storage tank, the sump and the filter. If acartridge typefilter is used on the tank, renew thefilter cartridgebefore

refilling the system withnew oil.(b) The following table should be observed for the operation of theengine:

OilInlet TemperatureDuring OperationATMOSPHERICTEMPERATUREBelow 3 2 FAbove 3 2 F

M IN IMUM100 F1 0 0 F

MAXIMUM1 8 0 F1 8 0 F

SAE3050

The minimum oil pressure should be not le ss than 70 pounds persquare inch with 160 F oil at 800 revolutions per minuteand a maximumof 95 pounds per square inch at 2,325 revolutions per minute with noload. The operating pressure at 2,000 revolutions per minute should beapproximately 8 5 pounds per square inch.TO RO CK E R B O X E ST H RU ' P U S H RODS '

A-VALVE SECTION OF TE M P E R A T UR E R E G U L A TOR VALVEC-OOL E R P R O T E C T IO N VALVED- IL TE MPERATURE GAU GE CON N ECT IONE -RESSURE P UM P INLETf-O CK E R BO X SCAVENGE R INLETG - IL S U M P S C A V E N G E R INLETJ -OIL PRESSURE R E L I E F VALVEK-AI R BREATHER HOLEM-THE OIL P U M P HA S A BUILT-IN FULL FLOW LUBRICATING OIL F I L T E R

RA PD 11696F f e u r a 9-L iAr fco fh aO f fMb

1 1


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TM 9-1750E2ORDNANCE MAINTENANCEGUIBERSON DIESEL T14OO ENGINE, SERIES 3

(c) The lubricating system is made up of a storage tank, oil filters,a combination oil pump, the engine, and an oil cooler. The combinationoil pump consists of a pressure pump, a scavenger pump for the crank-case, and a separate scavenger pump for the rocket boxes. The twoscavenger pumps are connected together on the outlet sides of the gearcompartments. A single outlet from the crankcase scavenger pump housing serves as the outlet for both scavenger pumps. See figure 28 for thevarious parts of the oil pump assembly.

(d) O il from the supply tank goes to the pressure pump which forcesthe oil through the Cuno oil filter into a cored passage in the accessorycase. Part of the oil is bypassed by the spring loaded pressure reliefvalve into a second cored passage which is connected to the oil returnline. This excess oil then goes through the oil cooler and back to themain supply tank. The cartridge type filters are connected to the pressure side of the scavenger gears of the oil pump. The oil moves slowlythrough this type of filter, leaving the small particles of dirt or carbonin the filter cartridges. This filtered oil returns directly to the oil tank.

(e) The oil which lubricates the moving parts of the engine isforced by the pressure pump from the cored passage through a drilledoil line to a circular groove located in the accessory case. This grooveis located immediately behind the starter jaw bushing. Oil passages aredrilled in the accessory case from this circular groove to the intermediategear, the idler gear, and the governor mounting pad.

(f) The starter jaw bushing is drilled to connect the circular groovein the accessory case with a groove in the starter jaw. Through this paththe oil is forced to the center of the crankshaft which is drilled to serveas a gallery line to supply oil to the master rod bearing, the knuckle pinbushings, and the valve cam. Pressure-forced oil from the crankshaftlubricates the valve cam and fuel cam gear. The gear train is lubricatedby the oil from the starter jaw, intermediate gear, and idler gear bushings, which also receive pressure lubrication.

(g) The oil which lubricates the parts in the crankcase and accessory case is splashed by the rotating parts to lubricate the piston pins.A s the oil falls to the bottom of the case it passes into the oil sump,from which it is pumped by the main scavenger pump. The oil isreturned through the joint return line to the cooler and oil supply tank.

(h) Push rods, tappets, and rockers are lubricated by oil that passesfrom the crankshaft through the drilled passage in the front crankcasesection to a circular groove machined in the front center sectionof the crankcase. Holes are drilled in the front crankcase section to connect the circular groove with holes drilled in each of the tappet guides.During the operation of the engine a hole in the tappet body comes incontact with the hole in the tappet guide to meter the shot of oil goinginto the hollow tappet body. Part of this oil lubricates the tappet bodyin the tappet guide. Another part of the oil passes by the check ball inthe tappet end of the push rod to lubricate the push rod ends before

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T M 9-1 750E2

G EN ER A L DESCR IPT IO N AND SPECIFICATIONS

KEYA TANK VE NTB FUEL TANKC TANK VALVED FUEL OIL F ILTERE SU P P LY P UMPF ONE WAY CHECK VAL VEG FUEL C HANNE L

H INJ E C TION P UMPI PR ESSUR E L INEJ INJ E C TORK DR IP L INEL FUEL R ETU R N R INGM R EGU LATOR VALVEN R ETUR N L INE

RA PD 11697

F i g u r e 10Diag ramm at ic Ske tch of Fu e l OilPat h s 13


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TM 9-1750E2-3ORDNANCE MAINTENANCE

GUIBERSON DIESEL T1400 ENGINE, SERIES 3passing on through the rocker to lubricate the rocker bearing. The oilwhich collects in the rocker boxes drains through a system of intercyl-inder drain tubes to the rocker box covers of No. 5 and No. 6 cylinders.The oil is then pumped through the rocker box scavenger oil pump intothe joint return line, which directs the oil into the oil cooler and to theoil supply tank. The oil is then ready to repeat the cycles previouslydescribed.

(i) Lubrication for the valve cam intermediate gear is supplied bypressure oil through drilled passages in the front center section of thecrankcase connecting the machined groove with the gear mountingspindle.

(j) A breather line from the right-hand breather opening (fromstarter end) is connected to the top of the oil supply tank through inletconnections in the oil tank. This line acts as a pressure stabilizing linebetween the air space in the oil tank and the crankcase. NOTE: It isrecommended that an atmospheric breather should be connected to theinspection plate opening in the accessory case.3. FUEL SY STEM.

a. Fuel Supply Pump. Fuel from the tanks is drawn through acombination cloth and disk filter by the fuel supply pump. The fuelsupply pump is mounted on the accessory case. The fuel supply pumpgear, on the inside of the accessory case, is driven by the idler gearwhich meshes with the gear on the starter shaft. The fuel supply pumphas a built-in safety bypass valve to protect the pump in case the flowof fuel should become restricted on the outlet side of the pump.

b. Fuel Oil Paths (fig. 10).(1) 'Fuel enters the fuel channel of the engine through a one-waycheck-valve located at the bottom of the rear mounting section of thecrankcase. This check-valve allows fuel to enter the fuel channel butthe check prevents it from draining back out again.(2) From the check-valve the fuel goes to the fuel channel, whichis a drilled passage in the rear mounting section of the crankcase con

necting the injection pump mounting holes. Fuel is supplied throughthis channel to each of the fuel injection pumps and passes from thepumps through the injector and into the combustion chamber.

c. Fuel Pressure Regulator (fig. 11).(1) The pressure by which the fuel is forced through the channelto the injection pumps is controlled by a fuel pressure regulator locatedat the top of the engine between No. 1 and No. 2 fuel injection pumps.(2) This regulator has a spring-operated valve which restricts thefuel passage until sufficient pressure is built up to overcome the springpressure. Adjustment is made by removing the cap, loosening the lock

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TM 9-1750E3GENERAL DESCRIPTION A NP SPECIFICATIONS

SCREW, ADJ USTING -GU-14-Y-117E

BODYGU-14-Y-117

V

VALVGU-14-Y

1SPRINGGU-14-Y-117G

ft GU-117C GU-14-

w

DEY-117B

NUT , LOCKGU-Y-307

aGU-14-Y V P-117D

REGULATOR, FUE L PRES SUREGU-52-YA-117A

RA PD 11698

f igu re J I Th e fuel P r e s s u r e R e g u l a t o r Assem b lynut and turning the adjusting screw to increase or decrease the springpressure . Thisvalve is set to open at a pressureof six pounds per squarein ch.

d. Fuel Injection Pump (f igs. 1 2 and 13).(1) The fuel must be injected into the combustion chamber under

extremely hig h pressure to overcome the resistance of the highly compre ssed air . This pressure is built up by a fuel injection pump at e,achcylinder, which also controls the quantity of fu el injected. The injectionpumps are connected to the injectors by a heavy wall, high pressuretubing.

(2) The plunger of the injection pump rides on a lever on the fuelcontrol plate assembly (fig. 13). The le ver in turn operates on the fuelcam ring, moving up and dow n over the cams on the fuel cam ring.This moves the injectionpump plunger up and down. Operation of thethrottle shifts the position of the levers, changin g the contact point ofthe plunger to a higher or low er position on the lever. This changes thelength of the plunger stroke, and regulates the amount of fuel injectedon each stroke.

(3) When the plunger is at the downward end of the stroke, fuelenters the pump through the inlet port above the plunger. A one-waycheck-valve allows fuel to flow through but prevents it from droppingback.

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TM 9-1750E3

GENERAL DESCRIPTION AND SPECIFICATIONS

FUEL-CONTROLLEV ER WEDGE

WIDE OPEN THROTTLE POSITIONILLUSTR ATION 1SHUT-OFF THROTTLE POSITIONILLUSTRAT ION 2

WIDEOPEN THROTTLE POSITIONS

PORTCLOSING*r

START OF STROKE STARTOF INJ ECTION ENDOF INJ ECTIONILLUSTR ATION 3 ILLUSTRAT ION 4 ILLUSTRATION 5 ENDOFSTROKEILLUSTRATION 6

Fig u re 13The Fuel Pum p Pr in c ip le17

RA PD 11700


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TM 9-1750E3



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TM 9-1750E3-4GENERA L DESCRIPTION AND SPECIFICATIONS

(4) A s the plunger moves upward, the fuel is trapped above it ,creating hydraulic pressure. A s the plunger continues to rise, the pressure builds up until the injector releases the fuel into the combustionchamber.

(5) The quantity of fuel which can be trapped above the plungerdepends upon the amount of fuel which is allowed to pass through theinlet port, which in turn depends upon the throttle position governingthe bottom position of the plunger stroke.(6) This is shown in figure 1 3 . A s the throttle lever is moved fromthe shut-.off position to the wide-open position, the fuel control lever

moves from the position in illustration 2 to theposition in illustration 1 .A s this is done, the low position of the plunger moves down as seen bycomparing the left-hand positionof the plunger marked "L ow " in illustration 1 and illustration 2 . This low position creates an opening of theintake port, with the plunger below port opening. By adjusting thethrottle, the length of the plunger stroke and the size of the intake portopening can be adjusted to any desired position betw een the shut-offand wide-open positions. Illustration 3 shows the maximum opening ofthe inlet port with a wide-open throttle. A s the plunger reaches theposition shown in illustration 4 the fuel is trapped above the plunger.The only means of escape fo r this fuel is through the injector and intothe cylinder until the plunger reaches the position shown in illustration 5 .At this position fuel comes through the drilled hole in the center of theplunger to the cutaway diameter and from there out into the fuel channel. After injection is thus completed, the fuel pumpplunger continuestorise to the position ofillustration 6.

e. The Fuel Injector (fig. 14). The fuel injector injects the chargeof fuel from the injection pump into the combustion chamber of thecylinder. The valve is held against its seat in the nozzle body by theinjector stem which is actuated by a spring. When the fuel pressurefrom the injection pump overcomes the force of the spring, the valvemoves back out of its seat in the nozzle body. Fuel is forced throughthe nozzle bodyand is injected into the combustion chamber. After thefu el is injected, the fuel pressure drops until the spring again fo rces thevalve back against its seat in the nozzle body, stopping the injection.Any excess fuel remaining in the injectorafter the injection is returnedto the fuel tank through the fuel return ring.4. TABULATED DATA,a. General.

(1) N A M E . The Guiberson Radial Diesel Engine.(2) M O D E L . T 1400.(3) M A N U F A CTU R E R . Guiberson D iesel Engine Co., Dallas, T exas.(4 ) S E R I A L N U M B E R S .LocationO n name plate on nose.Series 2Beginning at 52.

W A S H I N G T O N , 0,6,


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TM 9-1750E4 -6ORDNANCE MAINTENANCEGUIBERSON DIESEL T14OO ENGINE, SERIES 3

(5 ) I D E N T I F I C A T I O N .Series 2Cylinder barrel outside diameter, iy in .Series 3Cylinderbarrel outside diameter, 8% in.

b. General Specifications.Bore v .................................................... ?4 in-Stroke ...................................................... in .Number cylinders .............................................Cylinder arrangement ......................................RadialTotal piston displacement .............................. ,402 cu in.Rated crankshaft rpm.................. ............... ,325 max.Cooling media ............................................... AirCycle .................................................... strokeCompression ratio ............................................ 4 :1Fuel injection ............................................... olidRotation (facing front) ............................ ounterclockwise

c. Performance.Maximum rpm ............................................ ,325Rated BHP at 2,200 rpm. ................................. 350-375d. Fuel Consumption withSpecified Fuel.Gallons per hour at2,200 rpmfull power ......................20.5e. Temperatures.Exhaust flange temperature at the studnearest the center ofthe head,maximum....................................... 00 F

Cylinder flange temperature, maximum........................300 Ff. Dimensions (Over-all).Over-all diameter ........................................... 3 in .

Length with Coffman Starter and 30-volt generator............41% in .g. Center of Gravity.Horizontalforward of mounting ring by approximately.......... 6 in .Verticalcrankshaft center.

5 . REFERENCE TO OPERATION MANUALS.Many second echelon operations are often done by ordnance maintenance personnel. For information on these operations, refer to theusing troopTM for information.

6. ECH ELON BREAKDOWN OF MAINTENANCE OPERATIONS,a. Definitions of Words Used in the AttachedList of Repair JobsAllocated to the Various Echelons:(1) S E R V I C E . Consists of cleaning, lubricating, tightening bolts andnuts, and making external adjustments of subassemblies or assembliesand control.(2) R E P A I R . Consists of making repairs to, or replacement of, thepart subassembly or assembly that can be accomplished without completely disassembling the subassembly or assemblies and does not require heavy welding or riveting, machining, fitting, and/or alining.

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(3) REP L A CE. Consists of removing thepart subassembly or assemblyfrom the vehicle and replacing it with a new or reconditioned or rebuiltpart,subassembly or assembly, whichever the case may be.

(4) R E B U I L D . Consists of completely reconditioning and placing inserviceable condition any unserviceable part, subassembly or assemblyof the motor vehicle including welding, riveting, machining, fitting, alining, assembling andtesting.b. Echelon Breakdown of Operations.

ECHELONS(1 ) ENGINE 2 n d 3 r d 4 t hBearings, master rodReplace...................... X

Cam ringRecondition andReplace................. XCrankshaftRecondition andReplace................ XCrankshaft bearingsReplace....................... XCylinderReplace................................. XCylinderRecondition............................. XEngineClean andService......................... XEngineRebuild................................... XEngineRemove andReplace....................... XEngine front and rear supportsReplace andRepair.. . XFlywheelReplace................................. XFlywheel hubReplace............................. X 'Intake pipeReplace............................... XManifold, exhaust and mufflersReplace. ............ XManifold, exhaust, and mufflersRepair.............. XPiston, assemblyReplace.......................... XPistonpinFitting................................ XPiston ringsFitting................................ XRod, articulated, assemblyRecondition and Replace.. XRod, master, assemblyRecondition and Replace...... XRods, valve pushReplace.......................... XStarter, breech and tubeClean, Service or Replace.... XStarter, breechand tubeRepair. ................... XStarter, breech and tubeRebuild................... XStarter, cartridge typeClean, Service, Replace. ...... XStarter, cartridge typeRepair...................... XStarter, cartridge typeRebuild..................... XTachometer and cableReplace..................... XTachometer and cableRepair...................... XTiming gearsReplace............................. XV alvesLight G rinding and Replace.................. XValvesReseat andReface......................... XValve clearancesAdjust........................... XValve guidesReplace............................. X

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GUIBERSON DIESEL T14OO ENGINE, SERIES 3ECHE L O N S

2nd 3rd 4thValve liftersReplace.............................. XValverockersReplace............................. XValverollersReplace.............................. XValve springsReplace............................. X

(2 ) OIL IN G S Y S T E MO il pressureAdjust............................... X ^O il pressure valveRepair or Replace................ XO il pumpReplace................................ XO ilpumpRepair................................. XO il pumpRebuild................................ X

(3 ) C O O L I N G S Y S T E MBaffle, intercylinderReplace....................... XBaffle, intercylinderRepair andReplace............. XCowlingReplace.................................. XCowlingRepair and Replace....................... XSprings, intercylinder baffleReplace................. X

(4) FUEL SY STEMFuel filterService orReplace....................... XFuelfilterRepair................................. XFuel lines, low pressureRepair or Replace. .....'..... XFuel lines, high pressureReplace................... XFuel lines, high pressureRepair.................... XFuel pumpReplace............................... XFuel pumpRepair................................ XFuel pumpRebuild............................... / XGovernorReplace................................ XGovernorRebuild................................ XInjector, fuelReplace. ............................ X .Injector, fuelRepair.............................. XInjector, fuelRebuild............................. XPump, fuel injectorReplace........................ XPump, fuel injectorRepair......................... XPump, fuel injectorRebuild........................ X

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TM 9-1750E7

Sect io n IITROUB L E SHOOTING

ParagraphStarting trouble ............................................ 7Fuel system trouble......................................... 8Lubrication system trouble .................................. 9Cardinal operating rules..................................... 107. STARTING TROUBLE.

a. Shell Does Not Fire. After four attempts have been made andthe sh ell will not fire, wait five minutes before removing the cartridgefrom the breech. Then inspect the hole in the cartridge base and thecontact pin in the breech housing for foreign matter. Check the starterwiring in the tank to make sure that it is in order, and that there are noloose connections.

b. Shell Fires but Engine Does Not Turn. Check engine to see ifit will turn over properly by hand, then make all other checks followaccordingly.(1) SA F E T Y D IS K . If the safety disk is blow n, replace it .(2) CA R TRIDGE . Check identification mark to make sure it is theproper cartridge.(3) B REECH ASSEM BLY . The gases may be leaking through theassembly because of worn parts. If such is the case , replace the breechassembly.(4) S T A R T E R . If the above checks aremade and the engine does notturn over, replace the starter.c. Shells Do Not Fire Properly. Sometimes shells "fizzle" insteadof firing. This is usually due to defectiv e shells. After such an occurrence, the cap at the back of the starter should be removed and theunburned powder removed from the combustion chamber to preventdamage to the starter.d. Blown Safety Disk. A blow n safety disk is indicated by a loudreport w hen the 'shell is fired and the engine does not turn over. Replacethe safety disk in the starter. B e sure the asbestos side of the safetydisk is on the inside. If the disk continues to blow out, examine thesafety disk shear ring fornicks. Replaceif such is thecase.e. Starter Failure. If necessary to remove the starter, use as/ -inchwrench to remove the nuts, lock w ashers, and flat washers which holdthe rods of thestarter support to the engine mounting beam. Loosen theclamping rings of the support around the starter and generator, usinga 7/16-inch wrench. Remove the palnuts, nuts, and washers from thestarter mounting flange, using a 9/16-inch w rench, and pull the starterand support off the accessory case.

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GUIBERSON DIESEL T1400 ENGINE, SERIES 38. FUEL SYSTEM TROUBLE.

a. Engine Turns But Does Not Start. If, after two or three shellshave been fired and the engine has turned but has not started, the following may be the trouble:

(1) Determine if proper cartridge is being used bynoting the identificationon the cartridgebase.(2) Inspect the fuel lines for clogging, first between the fuel tanksand the primary filter, then between the primary filter and the fuelpump.(3) Check fuel supplyin fuel tanks.(4) Disconnect the fuel supply pump discharge line. Remove thefuel supply pump and turn the drive shaft of the pump by hand,

counterclockwise when facing the drive shaft. If fuel flows from thedischarge passage, the supply pump is operative. If fuel does not flow,install a new pump.(5) Check fuel tank shut-off valves to be sure that they are open.(6) Check for leaks in fuel lines or in fuel line connections.(7) Disconnect the fuel line between the fuel tank and the fuel filterat the fuel filter end. If fuel flows from the line, replace the fuel filterand reconnect the line. If fuel does not flow, disconnect the line at thetank end. If fuel does not flow from the tank, drain and replace thetank. If the fuel flows from the tank, blow out the line with compressedair and reconnect it.b. Faulty Fuel Injectors.(1) A faulty fuel injector may be indicated by a missing cylinder,

loss of power, or fuel knock. In such cases the injectors should be removed and tested. If defective, new injectors should be installed.(2) To remove fuel injectors, unscrew the injectors and fuel returnline nuts from the injector nipples, using a ^4-inch open-end wrench onthe injector line nut anda ^4-inch open-end wrench on the fuel return linenut. Loosen and unscrew the nutson the fuel pump and the fuel returnring so that the lines can be removed from the injectornipples withoutbending them. Remove the two palnuts, nuts and washers from eachinjector, using a ^4-inch wrench. Be sure the injectors are numbered toindicate to which cylinder the injector belongs. CAUTION: To preventdirt and foreign material fromentering, cover the openings with push-oncaps as soon as the injection lines have been removed.(3) Thoroughly clean the injectors of any dirt or grit, and placethem inlightweight oil toprevent possibility of corrosion.(4) S ee paragraph 78 for the disassembly ofinjectors.(5) S ee paragraph 77 for testing of injectors.c. Faulty Injection Pumps.(1) A faulty fuel injection pump may be indicated by a missingcylinder, loss of power, or fuel knock. In such cases, the pumps shouldbe removed and inspected. If defective, new pumps should be installed.

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TM 9-1750E8TROUBLE SHOOTING

(2) To remove injection pump, disconnect the injection line by unfastening the nuts which hold the line to the injector and to the injectorpump, using a 54-inch wrench. Be sure each pump is numbered toindicate the cylinder to which it belongs. Remove the palnuts, nutsand washers on each side of the injection pump, using a %-inch wrench.Thread the fuel pump adapter of the valve guide and fuel pump pullerGU-GST-1365 over the nipple of the injection pump. Remove the injection pump by operating the hammer of the puller.

(3) Clean the injection pump of dirt or foreign matter and placeit in a bucket of lightweight oil to prevent corrosion.(4) See paragraph 79 for the disassembly of the injection pump.d. Too Much or Too Little Fuel Pressure. Fuel pressure should

be set at six pounds per square inch. Fuel pressure is adjusted by loosening the lock nut on the fuel pressure regulator and turning the adjustingscrew in or out.

(1) Turn the adjusting screw in to increase pressure.(2) Turn the adjusting screw out to decrease pressure.(3) Tighten the lock nut.e. Incorrect Throttle Adjustment.(1) Before making any adjustments of the throttle, be sure thatthe throttle shaft lever does not bind against the accessory case. There

should be 0.020-inch clearance beween the lever and bushing withthrottle shaft pushed all the way in . If the throttle shaft lever binds,loosen the clamp bolt and throttle shaft nut, and adjust to give properclearance.

(2) With the throttle pressed to the floor, and the throttle shaftlever down in wide-open position, there should be 1/16-inch to %-inchclearance between the clevis pin and the end of the throttle shaft leveropening. Adjustment is made by turning the nut below the throttletie-rod clevis.

(3) Spring pressure should be sufficient to overcome friction in thelinkage. Adjustment is made by turning the nut on top of the spring.

. (4) Set idle adjustment to 800 revolutions per minute with theengine thoroughly warm.

(5) There is no adjustment necessary on the decompression rodand cable.

f. Incorrect Governor Setting.(1) The governor control shaft should have approximately 54-inchof free travel before it affects the throttle.(2) If the engine will .iot reach its speed at 2,325 revolutions perminute with no load, use a screwdriver to turn the adjusting screw inthe rear of the governor until engine reaches desired speed.

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GUIBERSON DIESEL T14OO ENGINE, SERIES 3(3) To remove the governor, disconnect the governor control shaft.

Remove the five palnuts, nuts and washers from the governor mountingflange, using a %-inch wrench. Pull the governor off the mounting studs.(4) See paragraph 171 for governor disassembly.

9. LUBRICATION SYSTEM TROUBLE.a. Oil Pressure Drops Suddenly. CAUTION: Stop engine immediately. Check oil level in tank. Check for dirt lodged under oil check inoil pressure relief valve. Check oi l line connections. Test oil pump.b. Incorrect Oil Pressure. NOTE: The minimum oil pressureshould be not less than 70 pounds per square inch with 16 0 F oil at800 revolutions per minute, and a maximum of 95 pounds per squareinch at 2,325 revolutions per minute (no load). The operating pressureat 2,000 revolutions per minute should be approximately 85 pounds persquare inch.(1) To adjust the oil pressure, remove the dome from the oil pressure relief valve, using a %-inch wrench. Loosen the lock nut and use a

screwdriver to turn the adjusting screw in or out.(a) Turn the adjusting screw in to increase oil pressure.(b) Turn the adjusting screw out to decrease oil pressure.(c) Tighten the lock nut.(2) Low oil pressure may be due to defective accessory case or

master rod bushing in the case of an engine that has seen considerableservice.1 0 . CARDINAL OPERATING RULES.

a. Turn the Engine Four Revolutions or More on DecompressionBefore Starting. WARNING: Do not operate the starter when theengine is on decompression.

(1) If the engine has been stopped, observe the following: Set theengine on decompression by pulling the decompression handle forward.Turn the engine four revolutions or more. Set the throttle in the startingposition. Release the decompression by pushing on the decompressionhandle.

(2) Do not have the engine on decompression when the engine isturning at operating speeds.

b. Allow Engine to Warm U p Gradually. It is very important thatall parts of the engine be allowed to maintain a temperature equilibrium.The pistons and cylinders especially must be allowed' to warm upgradually. The warm-up periods given in the following tables shouldbe observed.

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TM 9-1750E1 0TROUBLE SHOOTING

Above 30 FOperate engine at 1,000 rpm for 2 minutes,

at 1,200 rpm for 2 minutes,at 1,400 rpm for 2 minutes.Below 30 F

Operate engine at 1,000 rpm for 5 minutes,at 1,200 rpm for 5 minutes,at 1,400 rpm for 5 minutes.

c. Operate Engine Between 1,400 and 2,000 Revolutions PerMinute After Warm-up. Avoid continued low engine speed operationby shifting gears to maintain an engine speed above 1,400 revolutionsper minute. The maximum speed of the engine under load should notexceed 2,200 revolutions per minute. For long continued operation it isrecommended that the engine speed be less than 2,000 revolutions perminute.

d. Regulate Oil Temperature Within Recommended Range. Theoil temperature should be maintained close to the mid-values of thetemperatures given below:Oil Inlet Temperature During Operation

ra liSATOBE MINIMUM M AXIM UM SAEBelow 32 F 100 F 18 0 F 30Above 32 F 100 F 18 0 F 50

e. Avoid SuddenStopping. Cool Engine Gradually.(1) If a hot engine is suddenly stopped, the rate of cooling of thevarious parts of the engine is quite different from the rate of cooling

with the oil and air in circulation.(2) The engine should be allowed to cool as follows: It should beidled, with the tank out of gear, at 1,200 revolutions per minute for fourminutes and then at 1,000 revolutions per minute for two minutes.f. Use Clean Fuel of the Correct Specifications. Fuel oil of theproper specifications should be used. It is very important that the fuelbe kept as free fromwater and dirt as possible. Those handling the fuelshould make every effort possible to keep the fuel clean. A final stagefilter should be used between the fuel supply pump and the check valve

to the engine.g. Keep All Connections Tight. Difficulty from leaking lines orconnections should be prevented by frequent regular inspection.h. Check the Injection NozzlesPeriodically.(1) The injection nozzles should be maintained in good conditionto obtain the properpower and balance of the engine.(2) The injectors should be set for 2,600 to 2,650 pounds pressureper square inchon an injector testunit.

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TM 9-1750E1 1 ORDNANCE MAINTENANCEGUIBERSON DIESEL T140O ENGINE, SERIES 3Section I I I

DISASSEMBLY OF ENGINEParagraphGeneral precautions ........................................ 1 1Remove the exhaust manifolds .............................. 1 2Remove the rocker box scavenger hose ....................... 13Remove the fuel supply pump hose .......................... 14Remove the intake manifold ................................ 15Remove drain valve cable control and scavenger line ........... 16Free the generator and starter support brace .................. 1 7Remove the starter and brace ................................ 18Remove the generator ...................................... 19Remove the oil pump ...................................... 20Remove the throttle controls ............................... 21Remove the fuel pressure regulator .......................... 22Remove the flywheel nut and front cone ...................... 23Remove the engine mounting beam .......................... 24Remove the flywheel ....................................... 25Remove the decompression cable ..:......................... 26Remove the steady rest tube ................................ 27Remove the injector cover plates ............................ 28

Remove the injector lines ................................... 29Remove the interrocker box baffles ........................... 30Remove the cowling ....................................... 31Remove cowling ring and brackets .......................... 32Remove the intercylinder pressure baffles ..................... 33Remove the brackets for the intercylinder pressure baffles ....... 34Remove rocker box covers .................................. 35Remove the oil sump ....................................... 36Detach intercylinder drain lines .................. ........... 37Remove the fuel injectors ................................... 38Remove the push rods and push rod housings .................. 39Remove the cylinder ....................................... 40Remove the piston assemblies ............................... 41Insert rubber protectors over cylinder mounting studs .......... 42Remove the decompression lever ............................ 43Remove the crankcase front section .......................... 4 4Remove the bearing from crankcase front section ............... 45Remove the decompression plate ............................. 46Remove the valve tappets and guides ......................... 47Remove the valve cam ...................................... 48Remove the fuel injection pumps ............................ 49Remove the governor ...................................... 50Remove the accessory case ................................ 51Remove the fuel supply pump .............................. 52Remove the oil pressure relief valve and seat ................. 53Remove the crankcase front center section .................... 54Remove the crankshaft assembly ............................. 55Remove the fuel control assemblies .......................... 56

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TM 9-1750E11-15DISASSEMBLY O F ENGINE

11. GENERAL PRECAUTIONS.a. Before removing parts from the engine, check them for numbering in all cases where it is necessary to reinstall them at the propercylinder.b. Injectors and injection pumps should be placed in clean fuel oil

in a covered container immediately upon removal. Caps should be installedover the line openings to prevent the entrance of foreign material.c. Parts should be placed in or on storage bins as removed.

1 2 . REMOVE THE EXHAUST MANIFOLDS f i g . 7 ) .a. Equipment.

Wrench, open-end, %-in.b. Procedure. Remove the brass nuts and lock washers from the

exhaust manifold mounting studs at all cylinders. If none of the sectionsmust be replaced, the two halves of the exhaust manifolds can be liftedoff as two units, which will make it easier to install them. If sectionsmust be replaced and the manifolds disassembled, it will help in reassembling the manifold to number each section of the manifold to showthe cylinder to which it belongs. When the nuts and lock washers havebeen removed, lift each half of the manifold off the studs as a unit.13. R EMO VE THE ROCKER BOX SCAVENGER HOSE.

a. Equipment.Pliers

b. Procedure. Loosen the hose clamps at the rocker box scavengernipple and at the oil pump and remove the hose.14. R EMO VE THE FUEL SUPPLY PUMP HOSE.a. Equipment.Pliersb. Procedure. Fuel is carried through a hose from the fuel supplypump on the accessory case to the fuel check valve at the bottom of theengine where fuel enters the engine. Loosen the clamps at these twopoints with pliers and remove the hose from the nipples.

15. R EMO VE THE INTAKE M ANIFOLD (fig. 6).a. Equipment.

Wrench, open-end, 9/16-in. Wrench, socket, Yz- in..b. Procedure. NOTE: If none of the elbows or hose connectionsneed replacing, it will not be necessary to remove the elbows from themanifold ring.(1) F R E E T HE I N T A K E E LBO W S .W rench, socket, %-in.Remove the palnuts, nuts and washers fromthe intake elbows.

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GUIBERSON DIESEL T140O ENGINE, SERIES 3(2 ) REMOV E T H E B R A C K E T S .W rench, open-end, 9/16-in .Remove th e four brackets which hold the manifold to th e engine mounting beam.(3 ) L I F T O F F T H E MANIFOLD.W ith a man on each side, lift the manifold off the studs. If theintake elbows are removed from th e manifold ring, it will helpin reassembly if they are marked to indicate the cylinder to whichthey belong.

16. REMOVE DRAIN VALVE CABLE CONTROL ANDSCAVENGER LINE.a. Equipment.

Wrench, %-in. ' Wrench, 3/ -in..Wrench, %-in. Wrench, 1-in.Wrench, f^-in.

b. Procedure.(1) Remove %-inch bolt to free cable adjustment from the control

lever. Cut safety wire and remove support riut. Loosen mounting beam cable support, unfasten cable support at oil sump.Loosen jamb nut at cable end, then back off nut from T valvehousing and remove.

(2) Using a %-inch open-end wrench, remove the nuts, palnuts andflat washers which hold the mounting flange of the scavengerline to the accessory case. The scavenger line is a curved metaltubing. A short section of hose is used at the other end of thescavenger line to connect it to the oil sump. Loosen the hoseclamps on the oil sump and scavenger line, and pull out thescavenger line. Then remove the hose. Inside this hose is a brassliner which fits into theoil sump passage to prevent oil leakageand collapsing of the hose connection. If the hose it to be replaced, force out the brass liner and save it for installation inthe new hose.

1 7 . FREE THE GENERATOR AND STARTERSUPPORTBRACE ( f i g . 1 0 2 ) .

a . Equipment.Pliers Wrench, socket, fi-in.Wrench, socket, 7/16-in.b. Procedure.(1 ) FREE T H E GENERATO R A N D STARTER SUPPORT BRACE ARMS.W rench, socket, - i / f c - i n .

Free the upper ends of the long supporting arms of the generator and starter support brace by removing the nut, lock washerand flat washer that hold the arms to the engine mounting beam.3O


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TM 9-1750E17-21DISASSEMBLY OF ENGINE

(2 ) F R E E T H E STARTER C L A M P .Wrench, socket, 7/16-in.Remove the flat washer and elastic stop nut that hold the

clamp around the starter.(3) R E M O V E T H E G E N E R A T O R W I N D O W S T R A P .Pliers

Remove the window strap from around the generator byloosening the wing nut.

(4 ) L O O S E N T H E G E N E R A T O R C L A M P .Wrench, socket, 7/16-in.Loosen the clamp around the generator by loosening the nuts

of the clamping bolts.18. REMOVE TH E STARTER AND BRACE (fig. 102).

a. Equipment.Wrench, socket, 9/16-in.

b. Procedure. Remove the palnuts, hexagon nuts and washers fromthe starter mounting flange and pull the starter and brace off the studson the accessory case.19. REMOVE TH E GENERATOR (fig. 102).

a. Equipment.Wrench, socket, %-in.

b. _ Procedure. Remove the palnuts, nuts and flat washers from thegenerator mounting studs. Pull the generator off the studs.20. REMOVE TH E OIL PUMP (fig. 5).

a. Equipment.Pliers Wrench, socket, J4-in.b. Procedure. Cut the safety wire that runs from the packing nut

on the oil filter to the oil pressure relief valve, using pliers. Remove thepalnuts, nuts and washers from the oil pump mounting flange and slidethe oil pump off the studs on the accessory case.21. R E M O V E THE THROTTLE C ON T R OLS (fig. 5).

a. Equipment.Pliers Wrench, socket, %-in.Wrench, open-end, 7/16-in. .

b. Procedure.(1) REMOVE THE GOVERNOR CONTROL.

Wrench, open-end, 7/16-in.Remove the nut and washer that hold the ball socket joints ateach end of the governor control and remove the governorcontrol.

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TM 9-1750E21-23ORDNANCE MAINTENANCEGUIBERSON DIESEL T1400 ENGINE, SERIES 3

(2 ) F R E E T H E THROTTLE C O N T R O L S H A F T L E V E R .Wrench, open-end, 7/16-in.Loosen th e throttle control lever clamping screw on th e throttlecontrol shaft lever.(3) R E M O V E T H E TH R O TTL E C O N T R O L SHAFT L E V E R .Pliers Wrench, socket, %-in.

Using pliers, remove the cotter pin from the throttle shaft nuton th e throttle control shaft. U sing a %-inch socket wrench,rem ove th e nut and washer. T hen slide th e throttle controlshaft lever off th e throttle control shaft .

22. R E M O V E THE FUEL PRESSURE R E G ULATOR.a. Equipment.Pliers Wrench, open-end, %-in.Wrench, open-end, 7/16-in.b. Procedure.(1 ) R E M O V E T H E F U E L PRESSURE R E G U L A T O R LIN E .

Wrench, open-end, 7/16-in. Wrench, open-end, ^-in.Remove th e fuel pressure regulator line, that extends from th efuel pressure regulator to the fuel return ring, by loosening thenuts at each en d (7/16-inch open-end wrench at regulator en dand %-inch open-end wrench at fuel return ring end).(2 ) R E M O V E T H E H O S E .Pliers

Remove th e hose from th e fuel pressure regulator by looseningthe hose clamp.(3 ) R E M O V E T H E B R A C KE T A N D R E G U L A T O R .Wrench, open-end, %-in.Remove th e nuts which hold th e bracket to the engine mounting beam and remove th e bracket and regulator.

23. REMOVE TH E FLYW HEEL NU T AND FRONTCONE (fig. 101).

a. Equipment.Pliers W rench, flywheel hub nut, G U - G S T -15S4b. Procedure. Using pliers, remove th e safety wire from th e pinwhich locks th e flywheel nut to the front crankshaft. Then remove theflywheel nut and front cone, using th e flywheel hub nut wrench G U - G S T -1554. NOTE: T he front cone is in two halves. T he halves hav e a flangewhich fits into a groove in th e flywheel nut. The tw o halves of th e coneare held in place by th e flywheel hub when th e nut is tightened, but asth e nut is being rem oved, they should be held in place by hand to prevent them from falling out.

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TM 9-1750E24-28DIS A SSEMBLY OF ENGINE

24. REMOVE THE ENGINE MOUNTING BEAM.a. Equipment.Eye, engine lifting, GU-GST-1550 Wrench, open-end,y-'m .

Hoistb. Procedure.(1) With the front of the engine facing upward, screw the engine

lifting eye GU-GST-1550 on the front crankshaft and attach ahoist. Using a ^-inchopen-end wrench, remove the nuts, washersand bolts from the en gine mounting flange. Then lift the engineout of the irounting beam.

(2) NOTE: The engine should be mounted on an engine mountingstand, before pro ceeding with further disassembling operations,to facilitate working on it. The engine should be mounted so thatthe rear of the engine projects through the circular opening inthe platform on the stand. The engine can be held in place bybolting it to the platform through the flange of the crankcase. Astand with a revolving platform should be used. This will provide ready access to either side of the engine, since the enginemust be turned many times during disassembling operations.25. REMOVE THE FLYWHEEL.a. Equipment.Puller, flywheel, GU-GST-1561b. Procedure. Lift the flywheel off the front crankshaft; then remove the rear cone from the crankshaft by hand. NOTE: the flywheel

should be set on boards or wood blocks to prevent damage to the fan.26. REMOVE THE DECOMPRESSION CABLE.

a. Equipment.Pliers Wrench, socket, 9/16-in.b. Procedure. Remove the clevis pin from the clevis on the decompression cable (pliers) and free the clevis from the decompression lever.Remove cable support bracket by removing three 9/16-inch nuts andpalnuts, loosening the 7/16-inch nut at the clamp on the upper end ofthe support bracket. Remove cable from clamp and cowling.

27. REMOVE THE STEADY REST TUBE.a. Equipment.W rench, open-end, 54-in.b. Procedure. Remove the fourpalnuts, nuts and flat washers fromthe steady rest tube clamp.Lift off the clamp. Then slide thesteady resttube out of the assembly.

28. REMOVE THE IN JECTOR COVER PLATES (fig. 16).a. Equipment.Screwdriver

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GUIBERSON DIESEL T14OO ENGINE, SERIES 3b. Procedure. Remove the injector cover plates GU-52M-YX-107H1 by freezing the Dzus Fasteners (screwdriver) and sliding thecover plates down out of the brackets.

' LINE, FUEL INJECTORGU-53-YA-H2-A LINE, FUEL RETURNGU-52-YA-114-A

RA PD I2S7S IN JECTOR GU-52M-YA-113-AF igu re ISFuel In jec to r a n d Lines

29. REMOVE THE INJECTOR LINES (fig. 15).a. Equipment.Wrench, open-end, %-in.b. Procedure.

Wrench, open-end,

(1) F R E E T HE I N J E C T I O N L I N E .Wrench, open-end, 54-in.Turn the platform of the engine mounting stand so that therear of the engine is facing upward. U nscrew the nuts which

hold the fuel injection line G U - 53-YA-112A to the injectorGU-52M-YA-113A and to the injector pump.(2) F R E E T HE F U E L RETURN LI N E .

Wrench, open-end, %-in.Unscrew the nuts w hic h hold the fu el return line GU-52-YA-114A to the injector andto the fuel return ring.

(3) RE MO V E T H E L I N E S . Lift off the two lines as an assembly. Repeat this procedure on all cylinders. NOTE: Number the lines34


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TM 9-1750E29-30DISASSEMBLY OF ENGINE

as they are removed so that they can be reinstalled at thecorrect cylinder. IMPORTANT: Do not bend these lines. Toprevent dirt and foreign material from entering the injectors and.pumps, causing damage, cover the openings with push-on capsas soon as the fuel lines have been removed. Line the cap withapiece of paper toprevent damage to the threads.

P L A T E ,INJECTOR COVERGU-52M-YX-107H1BAFR . E , INTER -ROCK ER BOXGU-52M-YX-107G 1

STR IP , OIL SUMP STR IP , OIL SUM P OAFF I CC IK ITFPB A FF LE - L E F T HA N D B A FFL E - R IGHT H A ND rv , i K j n rp PPF^ MPFGU-52M-YX-107F6 GU-52M-YX-107F5 CI,,?vv inViiGU-O M-YX-IU/rl D

Ftgwre30. REMOVE THE INTERROCKER BOX BAFFLES (fig. 16).

a.' Equipment.Screwdriver Wrench, open-end,

b. Procedure. With the accessory case side of the engine up, unscrew the Dzus fasteners which attach the interrocker box baffles GU-52M-YX-107G1 to the intercylinder pressure baffles GU-52M-YX-107F1 at each side. Detach the Dzus fasteners which hold the inter-rocker box baffles to the cowling. Using a ^4-inch open-end wrench,remove the two narrow right and left-hand oil sump baffle strips GU-52M-YX-107F5 and 6 at each side of the oil sump. Using a 3/ -mchopen-end wrench, remove the bolts, nuts and washers that hold the frontof the interrocker box baffles to the intercylinder pressure baffles. Liftoff the interrocker box baffles. NOTE: The interrocker box baffles atNo. 5 and No. 6 cylinders must be removed from the flanges of the oilsump, by freeing the Dzus fasteners.

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31. REMOVE TH E COWLING (fig. JJ).a. Equipment.Screwdriverb. Procedure. Turn the engine so that the front of the engine isfacing upward. Remove the sections of the cowling GU-52M-YX-107Kby freeing the Dzus fasteners.

STEADY RESTBAR OPENING

RING, COWLGU-52-YX-107D14 STEADY REST

BAR OPENING

BAFFLE EXTENDS BETWEENSUMP ROCK ER BOXESCOWLING, SUB-ASSEMBLY

GU-52M-YX-107KRA PD 12577

Figure 17The Engine Cow l i ng32. RE M O V E COWLING RING AND BRACKETS (fig. 17).

Equipment.Pliers Wrench, socket, 7/16-in.b. Procedure. Cut the safety wire that holds the nuts where thebrackets are attached to the intake rocker box flanges. Using a 7/16-inchsocket wrench, remove the nuts, flat washers and bolts. Lift off thecowling ring GU-52-YX-107D14 together with the brackets.

33. RE M O V E TH E INTERCYLINDER PRESSURE BAFFLES (fig.16).a. Equipment.Screwdriver Wrench, open-end, Yz-in.b. Procedure. Turn the engine so that the accessory case side isfacing upward. Using a 54-inch open-end wrench, remove the nuts,

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TM 9-1750E33-38DISASSEM B L Y O F ENGINE

washers, spacers, and tie-bolts that hold the intercylinder pressurebaffles around the cylinder barrels. Unscrew the Dzus fasteners fromthe brackets at the forward ends of the intercylinder pressure baffles

. and remove the intercylinder pressure baffles.34. REMOVE TH E BRACK ETS FOR TH E INTERCYLINDERPRESSURE BAFFLES.

a. Equipment.Wrench, open-end, 9/16-in.b. Procedure. Remove the nut from the crankcase assembly bolt.

Lift off the bracket to which the inner cylinder pressure baffle isattached, replacing the nuteach time a bracket is removed.35. REMOVE ROCK ER BOX COVERS.

a. Equipment.Wrench, socket, 7/16-in.b. Procedure. Unscrew the nuts on the rocker box covers and remove the nuts, washers and covers.

36. REMOVE TH E OIL SUMP.a. Equipment.Wrench, socket, 9/16-in.b. Procedure. Turn the platform of the engine mounting stand sothat the front of the engine is facing upward. Remove the palnuts, nutsand washers which hold the oil sump to the crankcase. Then liftoff the

oil sump.37. DETACH INTERCYLINDER DRAIN LINES.a. Equipment.Pliersb. Procedure. Loosen the clamps on the intercylinder drain linesand remove the lines from the nipples on all cylinders.

38. REMOVE TH E FUEL INJECTORS (fig . 15).a. Equipment.Wrench, socket, 54-in.b. Procedure. Remove the two palnuts, nuts and washers from eachinjector and lift the injectors from the cylinder heads. NOTE: Be surethe injectors are numbered (number appearson front of flange) to indicate to which cylinder the injector belongs. The injectors should bethoroughly cleansed of any dirt or grit and placed in lightweight oil,orclean fuel oil, to prevent possibilityof corrosion.

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TM 9-1750E39

39.

ORDNANCE MAINTENANCEGUIBERSON DIESEL T1400 ENGINE, SERIES 3REMOVE THE PUSH RODS AND PUSH ROD HOUSINGS(figs. 18 and 19).

a. Equipment.Remover, push rod, GU-GST-1545Turner, crankshaft, GU -GST -1 5 0 2

b. Procedure.

Wrench, push rod housingnut, GU-GST-1306

(1) ATTACH T H E CRANKSHAFT TURNER.Turner, crankshaft, GU -GST -1 5 0 2Slip the crankshaft turner GU-GST-1502 over the splined endof the crankshaft, to help in turning the engine. NOTE: Thereis a wide spline on the crankshaft. A s this spline faces each cylinder, the piston in that cylinder is at the top of its stroke. Beforethe push rods and housings can be removed, the piston mustbe 80 degrees or more beyond top center, so that the piston willbe on the downstroke and there will be sufficient clearance forthe valve above the piston. Since" the angle between each tw ocylinders is 40 degrees, the wide spline of the crankshaft should

face the second cylinder beyond the cylinder from which thepush rods are being removed.WRENCH. PUSH R OD HOUSING NJ J T- GU-GST-1306

RA PD 12578 NUT, PUSH R OD HOUSING-U-13-Y-128-BFigure 78Removing P u s h Rod H o u s i n g Nut

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TM 9-1750E3 9DISASSEMBLY OF ENGINE

(2) T E S T R O C K E R ARM F R E E D O M. With the wide spline of the crankshaft 80 degrees beyond the cylinder from which the push rodsare being removed, move the rocker arms to se e if they are free.

If they are tight, the valve tappets are resting on a high lobeof the cam and the engine should be turned one completerevolution.

(3) L O O S E N P U S H R O D H O U S I N G N U T S .Wrench, push rod housing nut, GU-GST-1306With the rocker arms free, and the piston 80 degrees or morebeyond top center, loosen the push rod housing nuts GU-13-Y-128B at each end of both push rod housings. CAUTION: Donot loosen the push rod housing nuts on each cylinder until the

engine has been turned and the piston is on the downstroke.Loosening the nut on the inner end of the push rod housingallows the housing to move out of position, and the valve tappetmight be damaged when turning theengine.

(4) R E M O V E P U S H RO D AN D H O U S I N G .Remover, push rod, GU-GST-1545

Fitthe push rod remover GU-GST-1545 to a rocker so that theprong of the tool fits behind the upper arm of the rocker, andthe base of the tool rests on the lower arm of the rocker. Pushing on the handle of the tool will release the spring pressure on

NUT, P US H R O D HOUSING-GU-13-Y-12S-BR EMOVER , PUSH R O D

GU-GST-1545

RA PD 12579F igu re 19Remov ing Pu sh Rod an d H ous ing

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TM 9-1750E39-41ORDNANCE MAINTENANCEGUIBERSON DIESEL T1400 ENGINE, SERIES 3

the push rod so that the push rod and housing will lift out.Remove the other push rod and housing the same way. Thissame procedure can be followed to remove push rods and housings from the other eight cylinders.

40. REMOVE TH E CYLINDER.a. Equipment.Turner, crankshaft, GU-GST-1502Wrench, cylinder hold-down nut, with %-in. drive, GU-GST-1547b. Procedure.(1) NOTE: The cylinder barrel, cylinder head, and rocker assembly

are lifted off as a unit. In removing the cylinders, start with No. 8cylinder, then remove No. 9, and the others in order. This is done because the master connecting rod is in No. 7 cylinder, and this should bethe last to be removed so that it can hold the others in position. Thepiston should be on top dead center, as indicated by the wide spline ofthe crankshaft, when the cylinder is removed, otherwise the lower pistonring might not extend beyond the crankcase, and be damaged whenturning the engine to remove the piston.

(2) Using the 54-inch offset open-end wrench and the cylinder hold-down nut wrench GU-GST-1547 with a y-inch drive, remove the pal-nuts, nuts and washers from the studs that encircle the cylinder barrel.Then pull the cylinder barrel back off the studs and remove it from thepiston assembly. Repeat the operation on the other cylinders, using thecrankshaft turner GU-GST-1502 to turn the engine.41. R E M O V E TH E PISTON ASSEMBLIES (fig. 20) .

a. Equipment.Driver, piston pin, GU-GST-1510 Nail or similar pointed objectb. Procedure.(1) REMOVE T H E PISTON PIN PLUGS.Nail

A plug fits over each end of the piston pin. Insert a nail orsimilar pointed object into the hole in the plug and lift the plugout. NOTE: In working on the piston, it is advisable to holda hand under the piston pin, in case it falls out.

(2 ) REMOVE T H E PISTON PIN.Driver, piston pin, GU-GST-1510

Drive the piston pin out of the piston. CAUTION: Supportthe piston with a hand underneath while removing the piston pinto take any strain off the link rod.(3) REMOVE T H E PISTON. Pull the piston GU-53-Y-37 off the linkrod. Repeat this operation on the other eight cylinders, turningeach piston to top center before the barrel is removed.

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TM 9-1750E41-43

D ISASSEMBLY OF ENGINEaDRIVER, P ISTON P IN - U-GST-15IO

RA PD 12580

P ISTON, LINK ROD -GU-53-Y-37Fig u re 20Remov i ng the P iston

NOTE: The cylinder barrels, pistons, piston pins and plugsshould all be numbered to indicate the cylinder to which theybelong.

42. INSERT R UB B ER PROTEC TORS OVER CYLINDER M O U N T IN G STU D S.

a. Equipment.Protectors, rubber, cylinder studb. Procedure. A s each cylinder barrel and piston assembly is re

moved, the connecting rods are free to move back and forth in the cylinder openings, and they might damage or nick the link rods and crank-case. To prevent this, protectors can be cut from a piece of 2-inch rubberhose. Each protector will fit over two studs at the side of the cylinderopening. A flap should be left in the hose to extend down into thecylinder opening. Install these protectors at each cylinder opening asthe barrel is removed.43. R E M O VE THE DECOMPRESSION LEVER .a. Equipment.PliersWrench, socket, 7/16-in.b. Procedure. Loosen the clamp bolt (7/16-in. socket wrench) on

the decompression lever. Remove the cotter pin, using pliers, from the

Wrench, socket, 54-in.

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TM 9-17SOE43-44

ORDNANCE MAINTENANCEGUIBERSON DIESEL T14OO ENGINE, SERIES 3WRENCH, FRONT BEARING

NUT-GU-GST-1303 TURNER, CRANKSHAF TGU-GST-1502

RA PD 12581

Figu re 21Remov ing t h e Fron t Bear ing Nu tnut on the decompression shaft. Remove the nut (5^-in. socket wrench)and flat washer. Lift off the decompressionlever.44. REM OVE TH E CRANKCASE FRON T SECTION (figs. 21 and22).a. Equipment.Puller, front crankcase, Wrench, front bearing nut,GU-GST-1501 GU-GST-1503Turner, crankshaft, GU-GST-1502 Wrench, open-end, 9/16-in.Twine Wrench, socket, 9/16-in.Wrench, adjustableb. Procedure.(1 ) REMOVE F RONT BEAR ING N U T .Turner, crankshaft, GU-GST-1502Wrench, front bearing nut, GU-GST-1503

Place the front thrust bearing nut wrench GU-GST-1503 overthe crankshaft and fit the wrench into the bearing nut; thenusing the crankshaft turner to keepthe shaft from turning, drivethe nutwrench counterclockwiseto loosenandremove the thrustbearing nut.42


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TM 9-1750E44

DISASSEMB L Y OF ENGINE

P U L L E R , F R O NTC RAN KC ASE - GU -GS T-1501

C R A N K C ASEF R O N T SECTIONGU-53-YA-40

R A PD 12582

Fi g u re 22Remov ing Crankcase Front Sect ion43


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GUIBERSON DIESEL T14OO ENGINE, SERIES 3REMOVE T H E FRONT BEARING PLATE A N D S E A L RING GLAND.Wrench, socket, 9/16-in.Remove the nuts, spacers and washers from the front bearingplate and lift off the plate. Lift off the nose plate, seal ringgland, and gasket. NOTE: Pull the tappets out and lace cordor twine around them to hold them out so that they won'tinterfere while removing the crankcase front section.(3) REMOVE T H E C R A N K C A S E FRONT SECTION.Puller, front crankcase, GU-GST-1501 Wrench, open-end,Wrench, adjustable 9/16-in.

Using a 9/16-inch open-end wrench, remove the crankcasefront section hold-down palnuts, nuts and flat washers. Installthe front crankcase puller GU-GST-1S01 on the studs of thecrankcase front section GU-53-YA-40 as shown in figure 22.Place an adapter over the front crankshaft. Use an adjustablewrench to screw down the nuts on the puller evenly on each side.The crankcase front section will be pulled up off its studs. Thenremove the cord from the valve tappets.

SEC-(fig. 23).

Drift, brass Hammer

BEARING,FRONT THRUSTBALL-GU-52-Y-10

RA PD 12583


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TM 9-1750E4 5DISASSEMBLY OF ENGINE

28S'

oa.


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TM 9-1750E45-49ORDNANCE MAINTENANCEGUIBERSON DIESEL T14OO ENGINE, SERIES 3

Lift out the front bearing seal ring spacer. Usinga soft, brass drift, drive the front thrust ball bearing GU-52-Y-10 outof the crankcase front section, being sure to drive on the race and notthe balls themselves.

(fig. 3).Pliers Wrench, socket, 7/16-in.

Remove the cotter pins (pliers) and the four castlenuts (7/16-in. socket wrench) that hold the decompression lock plate.Lift out the decompression lock plate and plate. NOTE: The decompression control segment gear is held to the decompression plate by twonuts which are safety-wired together. It does not need to be removedunless the teeth are badly worn or broken.(fig. 24) .

Hammer, soft Wrench, socket, 7/16-in.(1) R E M O V E T H E A D A P T E R .

Wrench, socket, 7/16-in.Using a 7/16-inch socket wrench, remove the two elastic stopnuts and flat washers from each guide adapter GU-52-Y-121.Be careful that the wrench does not ride against the aluminumthreads of the adapter. Lift off the adapter.

(2) R E M O V E T H E T A P P E T . Remove the valve tappet lock ring GU-52-Y-125B from the groove in the valve tappet GU-52-Y-122,where it projects through the valve tappet guide GU-52-Y-121.Pull the tappet and valve tappet roller GU-52-Y-123 out of theguide. CAUTION: The valve tappet should be replaced in theguide in the same position as when it was removed. Note thisposition when removing the tappet from the guide.

(3) R E M O V E T H E G U I D E .Hammer, soft

Drive the guide out of the crankcase front section. Then replace the tappet in the guide in the same position as when itwas removed.(fig. 80).Lift off the valve cam, the sleeve, and the spacing washer.

(fig. 96).Puller, fuel pump, Wrench, socket, thinGU-GST-136S wall, %-in.

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TM 9-1750E49-50

b.(1)

(2)

DISASSEMBLY OF ENGINE

FREE T H E INJE C T IO N PU M P.Wrench, socket, thin wall, %-in.Remove the palnuts, nuts and washers on each side of theinjection pump.R E M O V E T H E INJE C T IO N P U M P.Puller, fuel pump, GU-GST-1365Thread thefuel pump adapter of the fuel injection pump pullerGU-GST-136S over the nipple of the injection pump. Operatethe sliding hammerof the tool, strikingit forcibly back until theinjection pump is pulled out. (Be sure the pump is numberedto indicate the cylinder to which it belongs.) Remove the injection pump gasket. Repeat thisoperation to remove the injectionpumps at all cylinders. NOTE: The injection pump should bethoroughly cleaned of dirt or foreign matter, being careful thatno dirt enters the internal partof the pump. Place in a bucketof lightoil orfuel oil to prevent corrosion.CASE , ACCESSORY PUL LER , ACCESSORY

GU-52-Y-143 CASE-GU-GST-1360 RA PD 12585

Rgun 25R em o v in g ffo A c c e s s o r y C o s e f r o m m* C r o n l c c o s e(fig. 5).

Wrench, socket, %-in.Turn the engine so that the rear is up. Remove thepalnuts, nuts and washers from the governor mounting flange and re

move the governor from the accessory case.47


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GUIBERSON DIESEL T14OO ENGINE, SER IES 3(fig. 25).

Pullers, accessory case, GU-GST-1360 Wr en ch, so cket, %-in.(1) F R E E TH E A C C E S S O R Y C A S E .Wr en ch, socket, J4-in.

Remove the palnuts, nuts and w ashers from the accessory casemounting studs. NOTE: Ther e may not be sufficient clearanceto remove the nut which is directly under the oil inlet to theaccessory case G U - 5 2 - Y -143. In that event, turn the nut backas far as possible. It can be rem oved as the accessory is takenoff. CAUTION: B efore removing the accessory case, be surethat there are no burs on the throttle shaft hexagon nut, or on theed ges of the starter shaft gear, that might damage the bushingsin theaccessory case as the accessory case is being removed.

(2) R E M O V E T H E A C C E S S O R Y C A S E .Pullers, accessory case, GU-GST-1360

Screw the ends of the accessory case pullers GU-GST-1360 intothe openings in the accessory case provided fo r that purpose.A s these tools are screwed in they will bear against the crank-case, forcing the accessory case back off the studs. When theaccessory case has been moved out far enough, remov e the nutfrom beneath the oil inlet to the accessory case (if it was nottaken off with the case in position). When the accessory caseis free, lift it off the studs.(3) R E M O V E S T A R T E R S H A F T A SS E M B L Y .

(fig. 5).Wrench, open-end, %-in.

R em ove the palnuts, nuts and washers from the fuelsupply pump mounting flange and remove the fuel supply pump fromthe accessory case.

Wr en ch, oil pressure relief valve seat plate, G U - GST- 1 3 SOWrench, open-end, 7/g-m . Wr en ch, open-end, \y-\n.(1 ) R E M O V E T H E O IL PRESSURE R E L I E F V A L V E .

Wrench, open-end, %-in. Wrench, open-end, 1%-in.Remove the oil dome from the oil pressure relief valve, usinga ^s-inch open-end wrench. Then, with a 1%-inch open-end

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TM 9-1750E5 3D IS A S S E MB L Y O F E N G IN E

MASTBt ROD IN NO .7 C Y LINDER

RA PD 125 86

Fig u r e26 L if t in g lh e Crank s hafto u tofheCrank c as eRear Cen ter Sec tio n49


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wrench, unscrew the nut which holds the relief valve to theaccessory case and remove the relief valve and spring.

(2) REMOVE THE OIL PRESSURE RELIEF VALVE SEAT.W rench, oil pressure relief valve seat plate, GU-GST-1350To remove the oil pressure relief valve seat, insert tiie oilpressure relief valve seat plate wrench GU-GST-1350 into theslot in the seat and screw the seat out. The seat and valveshould be kept together and handled carefully.

Hammer, brass Wrench, socket, 7/16-in.Remover, crankcase bolt, Wrench, socket, 9/16-in.GU-GST-1338

(!) Turn crankcase mounting stand over until crankcase is againhorizontal, with spline end of crankshaft up.

(2) Using a 9/16-inch socket wrench, remove the nuts from thecrankcase assembly bolts that hold the front and rear center section ofthe crankcase together. Tap up with the brass hammer on all the boltsto give sufficient clearance to attach the crankcase bolt remover GU-G S T - 1 3 3 8 .(3) Attach the remover to the bolt head and remove the bolts bystriking the sliding hammer of the tool forcibly back.(4) Lift off the crankcase front center section evenly, until it clearsthe crankshaft. It may be necessary to tap up on the crankcase with a

soft hammer to free it .(5) Remove the safety wire from the intermediate gear cap screws,and, using a 7/16-inch socket wrench, remove the six cap screws andthe bolt. Remove intermediate gear and spindle from crankcase.(fig. 26).

E y e , engine lifting, GU-GST-15SO HoistScrew the engine lifting eye GU-GST-1550 onto the

end of the crankshaft. Using a hoist, lift the crankshaft assembly outof the crankcase rear center section.(figs. 27 and70).

Pliers Wrench, socket, %-in.Wrench, fuel cam mounting plate lock nut, GU-GST-1S5150


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TM 9-1750E56DISASSEMBLY O F ENGINE

WRENCH, F U E L CAM MOUNTING P LATE LOCKNUT - GU-GST-1551 RA PD 12S87

Figure 27Remove t h e Fue l C am M o u n t i n g P late L o c k Nu t

(1) R E M O V E T H E FUEL C A M RIN G A N D DRIVE G E A R .PliersWrench, fu el cam mountingplate lo ck nut, GU-GST-1551Remove the cotter pin from the lo ck nut. Using the fuel cammounting plate lock nut wrench GU-GST-1551, unscrew thelock nut and liftoff the spacer. Lift the fuel cam ring and drivegear out of the fuel control lever mounting plate.

(2) R E M O V E T H E FUEL C O N T R O L L E V E R M O U N T I N G P L A T E . Lift thefuel control lever mounting plate out of the rear crankcasemounting section.(3) R E M O V E T H E M O U N T I N G P L A T E .W rench, socket, %-in.

Remove the nuts, washers and spacers that hold the fuel cammounting plate in place, and lift off the mounting plate.(4) R E M O V E T H E L O C K RING.Wrench, socket, y-in.

Remove the nuts, washers and safety wire which hold thelo ck ring in place. Slide the lock ring off the studs.51


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Sect ion IVTHE INSPECTION

ParagraphGeneral ................................................... 57The oil pump ............................................. 58Removal of rear crankshaft ................................. 59Inspect the rear crankshaft assembly. ........................ 60Inspection of the front crankshaft. ............................ 61Remove the link rods ....................................... 62Inspect link rods ........................................... 63Inspect the master rod ...................................... 64Inspect the knuckle pins .................................... 65Assemble master rod ....................................... 66Test the oil passages in the master rod assembly. .............. 67Assembling the crankshaft and master rod assembly............ 68Install crankshaft main bearings ............................. 69Checking the crankshaft for run-out .......................... 70Inspect the pistons .......................................... 71Dismantle the cylinders .................................... 72Inspect the cylinders ....................................... 73Inspect valves and valve operating mechanism. ................ 74Install the valve assemblies ................................. 75Inspect the fuel injection lines ............................... 76Check injection pressure. .................................... 77Inspect the fuel injector ............................... .... 78Inspect the fuel injection pump .............................. 79Inspect the fuel check valve ................................. 80Inspect the fuel pressure regulator ........................... 81Inspect the oil sump .....:.................................. 82Disassembly of accessory case assembly. ...................... 83Inspection of accessory case assembly ........................ 8 4Assembly of accessory case assembly ......................... 85Inspect the fuel cam and control lever assemblies............... 86Inspect the starter shaft subassembly. ........................ 87

a. When the engine is completely dis

TM 9-1750E Guiberson Diesel T1400 Engine, Series 3, For Medium Tanks M3 and M4, Etc 1942

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Transcript of TM 9-1750E Guiberson Diesel T1400 Engine, Series 3, For Medium Tanks M3 and M4, Etc 1942