M313, M315, M316, M318 Và M322 CAT Hyraulics

Systems Operation M313C, M315C, M316C, M318C, M322C, M318C MH and M322C MH Excavators Hydraulic System

Main Hydraulic System SMCS - 5050; 5051; 5069; 5117; 5472

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Product: EXCAVATOR Model: M313C EXCAVATOR BDR Configuration: M313C Excavator BDR00001-02000 (MACHINE) POWERED BY 3054 Engine

Media Number -RENR5564-05 Publication Date -01/07/2004 Date Updated -20/07/2004

i01934367

Page 1 of 9M313C Excavator BDR00001-02000 (MACHINE) POWERED BY 3054 Engine(SE...

9/25/2004https://sis.cat.com/sisweb/servlet/cat.dcs.sis.controller.techdoc.CSSISFormatTechDocF...

Illustration 1

Main hydraulic system

(1) Steering valve

(2) Swing drive

(3) Stick cylinder

(4) Bucket cylinder



(5) Boom cylinders

(6) Travel motor

(7) Main control valve

(8) Transmission

(9) Pilot valve (blade)

(10) Stick and swing pilot valve

(11) Travel pilot valve

(12) Pilot valve (boom and bucket)

(13) Service brake valve

(14) Steering priority valve

(15) Aux/pilot/steering/brake pump

(16) Main pump

(17) Swing pump

(18) Fan pump

(19) Fan group

(20) Pilot manifold

(21) Medium pressure attachment valve



Illustration 2 gSchematic for the M318C, M318C MH, M322C, and M322C MH

(1) Steering valve

(2) Swing drive


(9) Pilot control valve (blade)

(10) Pilot control valve (stick and swing)

(11) Pilot control valve (travel)

(12) Pilot control valve (boom and bucket)

(13) Service brake control valve


(16) Main hydraulic pump

(17) Swing pump

(18) Fan pump

(19) Fan group



(20) Pilot manifold

(21) Control valve (medium pressure function)

(22) Swivel

(23) Control valve (VA boom)

(24) VA boom lowering control valve

(25) VA boom cylinder

(26) Quick coupler

(27) Boom lowering control valve

(28) Stick lowering control valve

(29) Control valve (combined function)

(30) Pilot control valve (hammer or auxiliary tool)

(31) Pilot control valve (VA boom)

(32) Solenoid valve (oscillating axle)

(33) Swing charge pump

(34) Return filter



Illustration 3 gSchematic for the M313C, M315C and M316C

(1) Steering valve

(2) Swing drive


(9) Pilot control valve (blade)

(10) Pilot control valve (stick and swing)

(11) Pilot control valve (travel)

(12) Pilot control valve (boom and bucket)

(13) Service brake control valve


(16) Main hydraulic pump

(17) Swing pump

(18) Fan pump

(19) Fan group



(20) Pilot manifold

(21) Control valve (medium pressure function)

(22) Swivel

(23) Control valve (VA boom)

(24) VA boom lowering control valve

(25) VA boom cylinder

(26) Quick coupler

(27) Boom lowering control valve

(28) Stick lowering control valve

(29) Control valve (combined function)

(30) Pilot control valve (hammer or auxiliary tool)

(31) Pilot control valve (VA boom)

(32) Solenoid valve (oscillating axle)

(33) Swing charge pump

(34) Return filter



The M300C excavator hydraulic system uses four hydraulic pumps. Main pump (16) provides oil to main control valve (7). Swing pump (17) provides flow for swing motor (2). Fan pump (18) provides oil for fan motor (19) .

Aux/pilot/steering/brake pump (15) provides oil to the following components:

Illustration 4 g(6) Travel motor

(8) Transmission

(22) Swivel

(35) Blade cylinder

(36) Transmission control valve

(37) Brake

(38) Travel brake valve

(39) Oscillating axle cylinder

(40) Steering cylinder

(41) Stabilizer cylinder



! Steering priority valve (14)

! Steering control valve (1)

! Steering cylinder (40)

! Brake control valve (13)

! Pilot manifold (20)

! Medium pressure control valve (21)

Solenoid valves in the pilot manifold direct pilot oil to the following components:

! Implement pilot valves

! Main pump (16) (powershift pressure)

! Swing pump (17) (pilot limiting)

! Travel pedal

! Travel motor (6) (creeper)

! Swing brake

! Oscillating axle cylinders (39)

The remaining flow that is not used for the pilot circuit is directed to the circuit for the medium pressure attachment (if equipped).

The pilot valves control the various implement circuits, swing pump (17), stabilizer cylinders (41), blade cylinder (35) and travel motor (36) .

Pilot oil flows to the transmission clutches from the solenoid valve for transmission shifting and the parking brake solenoid valve. The travel motor (6) provides mechanical input into the transmission.

Main control valve (7) may be equipped with additional circuits such as the VA boom and auxiliary tool control.

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Sat Sep 25 07:37:16 UTC+0700 2004



M313, M315, M316, M318 Và M322 CAT Hyraulics

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