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Nebraska Tractor Tests Tractor Test and Power Museum, The Lester F.Larsen

1-1-1953

Test 506: John Deere 70 All-FuelTractor Test MuseumUniversity of Nebraska

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Museum, Tractor Test , "Test 506: John Deere 70 All-Fuel" (1953). Nebraska Tractor Tests. Paper 67.http://digitalcommons.unl.edu/tractormuseumlit/67

The Experiment StationUniversity of Nebraska College of AgricultureW. V. Lambert, Director, Lincoln, Nebraska

Department of Agricultural EngineeringDates of test: September 25 to October 1, 1953Manufacturer: JOHN DEERE WATERLOO TRAC-

TOR WORKS OF DEERE MANUFACTURINGCOMPANY, WATERLOO, IOWA

Manufacturer's rating: Not ratcd.BELT HORSEPOWER TESTS

HpCrank

I

Fuel Consumption

I

Watershaft used,peed Gal Hp-hr Lb per galrpm per hour I per gal I hp-hour per hour I

Barometerinches ofmercury

Temp Deg F

CoolingI

Airmed

TEST B-I00% MAXIMUM LOAD-TWO HOURS

43.~~~ 1-.J75 _1_4.:22J_1 10.21 1 0.649 1 0.00 1 In_I~1 28.773TEST C-OPERATING MAXIMUM LOAD-ONE HOUR

975 1 3.697 1 11.06 1 0.599 1 0.00 I 1741641 28.720TEST D-RATED LOAD--ONE HOUR

38.40 1-975-1-3.522-11O~9o-lo.608-I--o.ool 173 1 66 1 28.700TEST E-VARYING LOAD-TWO HOURS (20 minute runs; last line average)

'38.40 I 974 I 3.516 I 10.92 I 0.607 I I 174 I 66 1

:::1.91 I 1066 1 1.394 I 1.37 1 4.838 1 I 170 1 66 1

20.63 1 1037 I 2.385 1 8.65 I 0.766 1 '" 1 m-1-67-1~-39.5G I 931 I 3.575 I 11.05 I 0.600 1-1-175-1-68-t--

10.45 1 1054 I 1.873 1 5.58 I 1.189 I I 176 1691"'~I 1018 1 2.896 I 10.42 1 0.636 I, 1 170 I 71 1

23.51 1 1013 1 2.606 1 9.02 1 0.735 I 0.00 I 174 1 68 I 28.645TORQUE (At Dynamometer) ,

flO03 1 946 I 894 I 850 I 800 1 759 I 702 1 651 1 606 I 5561238.9 1246.6 1252.9 1259.7 1264.6 1265.3 1264.8 1263.4 1260.2 1255.2

DRA WBAR HORSEPOWER TESTS

',:'40.90

,'EngrpmLb-ft

'

I

Draw

I

Speed

I

Crank

Hp bar miles shaftpull per speedlb hr rpm

Slip

I

Fuel Consumption

I

Water Temp Deg F

I

of used Barometerdrive Gal Hp-hr Lb gal Cool- inches of

wheels perl

perl

per per ingI

Air mercury'10 hour gal hp-hr hour moo

TEST F-I00% MAXIMUM LOAD-3rd Gear

39.58 1 3292 1 4.51 1 976 1 5.71 1 Not Recorded... ,. I174 I72 I 29.220TEST G---cOPERATING MAXIMUM LOAD

. 29.50 1 5102 I 2.17 I 975 i 16.05 I ..,. .Not Recorded...,. 1 173 1 82 1 29.240

37.17 1 4130 1 3.38 I 975 I 7.41 1 ,." Not Recorded 1 174 169TZ9.240, 36.77 1 3037 1 4.54 1 976 1 5.08 1 Not Recorded, , . " 1 182 1 79 I 28.720'37.251 2134 1 6.55 I 976 I 3.36 1 .'... Not Recorded. . . .. 1 175 1 79 1 28.735

35.25 I 1469 1 9.00 I 978 1 2.26 I ,.'.. Not Recorded I 176 I 82 I 28.770

33.40'1 971 I 12.90 1 978 1 1.36 I ...,. Not Recorded, . , " I 178 I 84 128.770TEST H-RATED LOAD-TEN HOURS-3rd Gear

'31.06 I 2539 I 4.59 I 976 I~U..!~I~I 0.667 10.00 LJll_12iJ 28.959TEST J-OPERATING MAXIMUMLOAD-3rd Gear

37.01 13114 1 4.46 I 9741~1 , Not Recorded".,. 1178 1 80 1 29.140

, TEST K-OPERATING MAXIMUM LOAD-3rd Gear

35.50 1 3196 I~I 975 i 10.44 I Not Recorded. . , ,. 1 177 I 78 I 29.120TIRES, WHEELS AND WEIGHT

Tests F, G & H Test J Test K

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NEBRASKA TRACTOR TEST NO. 506

JOHN DEERE 70 ALL FUEL

FUEL, OIL and TIME Tractor Fuel octane NoASTM 40 (rating taken from oil company's typicalinspection data); weight per gallon 6.630 Ib OILSAE 20; to motor 2.446 gal; drained from motor1.866 gal Total time motor was operated 41 hours.

CHASSIS TYPE Tricycle Serial No 7001448 Treadwidth rear 60" to 88" front 85/16" and 121/16"Wheel Base 91" Hydraulic control system direct en-gine drive with throw out lever Advertised speedsmph first 2.5 second 3.5 third 45 fourth 6.5 fifth8.75 sixth 12.5 reverse 3.25 Belt pulley diam 12 Is"face 7 %" rpm 975 Belt speed 3285 fpm Clutch drymultiple disc operated by hand lever Seat upholsteredseat with back rest Brakes internal expanding shoeoperated by two foot pedals Equalized no Power take-off direct engine drive with independent clutch.

ENGINE Make John Deere Type 2 cylinder hMi-zontal Serial No 7001448 Crankshaft mounted cross-wise Head I Lubrication pressure Bore and Stroke6 ~~ " " 7" Rated rpm 975 Compression ratio 4.6 to 1L'imlacement 412.5 ,eu in Port Diameter Valves Inlet2 y.'" Exhaust 2 18" 'Governor variable speed cen-trifugal Carburetor Size 1 Yz" double barrel IgnitionSystem battery Starting System two 6 volt batteriesAir Cleaner Oil washed wire mesh Muffler was used

Oil Filter replaceable impregnated paper elementCooling medium temperature control thermostat

REPAIRS AND ADJUSTMENTS: No repairs ora-jjustmen ts.

REMARKS All test results were determined fromcbsen'eJ data and without allowances, additions orde:luctions. Tests Band F were made with carburetorset for 100% maximum belt horsepower and data[1'(1:11these tests were used in determining the horse-power to be developed in tests D and H, respectively.Tests C, D, E, G, H, J & K were made with an

operating setting of the carbureto[ (selected by themanu:acturer) of 94.8% of maXlllmll1 belt horse-power.

HORSEPOWER SUMMARYDraw-

bar Belt1. Sea level (calculated) maximum

horsepower (based on 600 F and29.92" HG) 41.00 '}4.96

2. Observed maximum horsepower(tests F & B) 39.58 43.15

3. Sevcnty-five per cent of calculatedmaximum drawbar horsepower andeighty-five per cent of calculatedmaximum belt horsepower (for-merly ASAE and SAE ratings) 30.75 38.22

We, the undersigned, certify that this is a trueand correct report of official tractor test No. 506.

L. F. LARSENEngineer-in-Charge

C. W. SMITHL. W. HURLBUTF. D. YUNG

Board of TractorTest Engineers

Rear wheels

...-IjTpeCast iron Cast iron Cast iron

Liquid ballast 610 Ib each None None

Added cast !fon 140 Ib each None None

Rear tiresNo. and size Two 13-38 Two 13-38 Two 12-38

Ply 6 6 6

Air pressure 14 Ib 12 Ib 12 Ib

Front wheelsType Presscd steel Pressed steel Pressed ste:1

Liquid ballast Non None None

Added cast iron None None None

Front tiresNo. and size Two 6.00-16 Two 6.00-16 Two 6.00-16

Ply 6 6 6

Air pressure 28 Ib 28 Ib 28 Ib

Height of drawbar 18 Yz inches 18 Yz inches 18 inches

Static weightRear end 6084 Ib 4586 Ib 4464 Ib

Front end 1876 Ib 1894 Ib 1896 Ib

Total weight as testedwith operator 8135 Ib 6655 lb 6535 lb

EXPLANATION OF TEST REPORT

TEST A: The manufacturer's representative operates thetractor for a minimum of 12 hours using light to heavy draw-bar loads in each gear. .

This serves as a period for limber up, general observationand adjustments. Adjustments that are permissible includevalve tappet clearance, breaker point gap, spark plug gaps,clutch and others of a similar nature. No new parts or acces-sories can be installed without having mention made of it inthe report.

No data are recorded during this preliminary run exceptthe time that the engine is operated.

BELT HORSEPOWER TESTS

TEST B: The throttle valve is held wide oper. and thebelt load on the dynamometer is adjusted so that the engineis at the rated speed recommended by the manufacturer. Car-buretor, ignition timing and manifold adjustments :lre all setfor maximum engine power.

This test is designed to determine maximum belt horse-power of the tractor at rated speed and to measure fuel can-.sumption at the maximum power on the belt.

TEST C: For tractors with carburetors the best fuel econ-

omy does not always occur when the engine develops maxi-mum power at rated speed. Test C is intended to allow themanufacturer's representative to select a more economical fuelsetting even though there is a slight loss of power. This morepractical carburetor setting is used in all later tests except testF. The throttle valve is held wide open and load adjusted togive rated rpm. Tests Band C are the same for diesel tractors,which have an altogether different fuel system.

TEST D: The throttle control lever is set so that the gov-ernor will maintain rated engine speed when rated load isapplied. Rated load is 85% of 100% maximum, as obtained intest B, corrected to standard conditions.

This rating is somewhat less than the maximum belt horse-power in order that the operator may have a certain amountof reserve.

TEST E:

Varying load serves to show the range of engine speedswhen the engine is controlled by the governor during the fol-lowing varied loads of 20 minutes each: rated load, no load,Yz rated load, maximum load at wide open throttle valve,1.1 and Y4rated load.

The average result of this test shows the average powerand fuel consumption. Since the average tractor is subjectedto varying loads, these data serve well in predicting fuel con-sumption and efficiency of a tractor in general use.

Torque, lb-ft at dynamometer, is obtained with wide openthrottle and sufficient load is applied to give several readings.

DRA WBAR HORSEPOWER TESTS

In all drawbar tests the pull exerted by the tractor is trans-mitted by a hydraulic pressure cylinder to a recording instru-ment in the test car. All tests are made on the same dirt testcourse which is maintained by grading, sprinkling and rolling

'--'"50 that it remains very nearly the same throughout the season.The same tires, wheels and weights are used for all tests exceptJ and K.

TEST F: A drawbar test, the results of which are used todetermine the rated drawbar horsepower in test H. The car-buretor is set to develop maximum power as in test B. Thefated gear recommended by manufacturer as plow gear isused in this test. The drawbar load is adjusted to give ratedengine speed.

TEST G: Maximum drawbar horsepower is determined ineach gear when the carburetor is set for fuel economy as intest C. The throttle valve is held wide open and the load isapplied so that the engine runs at rated engine speed.

, When operating in low gear it is not uncommon for thetractor to develop less drawbar horsepower than in rated gearbecause of exceS's1vewheel slippage. When excessive wheelslippage occurs the load is reduced until slippage approaches16%. When the load is reduced it is necessary to operate thetractor engine at part throttle and control engine speed bygovernor action.

TEST H: Intended to test the ability of the tractor to runcontinuously for 10 hours at rated drawbar horsepower andto determine the fuel consumption during that time. Rateddrawba'r horsepower is 75/~ of 100% maximum drawbar horse-power (Test F), corrected to standard conditions.

When operating at rated load the throttle control lever isset to maintain rated engine speed. This rating is less thanmaximum drawbar horsepower in order that the operator mayhave a certain amount of reserve.

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TEST J: The tractor is operated in rated gear with all addedweight removed. This test shows the effect of the removal ofadded weight on the performance of the tractor when com-pared with test G.

Removal of wheel weights generally increases wheel slip-page and decreases draw bar horsepower.

. TEST K: Similar to test J except that the smallest tires

and lightest wheels offered by the manufacturer are used.

' /