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

1-1-1953

Test 503: John Deere 40Tractor Test MuseumUniversity of Nebraska

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Museum, Tractor Test , "Test 503: John Deere 40" (1953). Nebraska Tractor Tests. Paper 64.http://digitalcommons.unl.edu/tractormuseumlit/64

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

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Department of Agricultural EngineeringDates of test: September 9, 1953 to September 17,

1953Manufacturer: JOHN DEERE DUBUQUE TRAC-

TOR WORKS OF DEERE MANUFACTURINGCOMPANY, DUBUQUE, IOWA

Manufacturer's rating: Not rated.

BELT HORSEPOWER TESTS

Fuel Consumption

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Water

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Temp Deg Fused

Gal Hp-hr Lb per gal Cooling Airper hour 1 per gal l hp-hour per hour med I I

Barometerinches ofmercury

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Crank

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Hp shaftspeedrpm

TEST B-lOO% MAXIMUM LOAD-TWO HOURS

24.251 1850 1 2.315 I 10.48 1 0.584 1 0.00 I 194 I 70 1 29.030TEST C OPERATING MAXIMUM LOAD-ONE HOUR

23.51 [ 1850 I 2.106 I 11.16 1 0.548 1 0.00 [ 192 I 58 1 29.035TEST D--RATED LOAD-ONE HOUR

2~1 1849 1 1.899 1 11.31 1 0.541 1 0.00 1 191 I 57 I 29.020TEST E-VARYING LOAD-TWO HOURS (20 minute runs; last line average)

21:471 1849 1 1.897 1 11.32 1 0.541 1 1 191 1 56 1

0:511 2043 1 0.876 1 0.58 1 10.510 1 1 164 1 55 r . . . . .

---yr.lo-I1907-1~-I s:421 0.727 1 ... [ 180 1 53-1--

2~~1~J5~1_2.020_1 11.32_I~LI ... 1 190 1 52 1-5.73 I 1967 1 1.108 1 5.17 I 1.183 I 1 181 I 52 1

17.18 1 1969 1 1.686 I 10.19 I 0.601 I ...1 187 I 55 [

13.14 1 1919 I 1.484 1 8.85 I 0.691 I 0.00 I 182 I 54 I 29.020TORQUE (At Dynamometer)

Eng rpm 1~~~1J.755 1 1656 1~11441 11346 I 1254 11149 11038 1 936Lb-ft-1142.2 1146.7 1151.2 1151.2 [153.5 1152.6 1153.3 1149.9 1147.0 1141.9

DRA WBAR HORSEPOWER TESTS

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Draw

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Speed

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Crank

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s~t

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. Fuel Consumption

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';;::~r

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Temp Deg F

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Barometerbar miles shaft drive Gal Hp-hr Lb gal Cool- inches ofpull per speed wheels per

lper

lper per ing

lAir mercury

lb hr rpm o/., hour gal hp-hr hour med

Hp

" /

TEST F-I00% MAXIMUM LOAD--3rd Gear

21.7111879r 4.331 1845 I 7.57 I Not Recorded. . . .. 1 203 I 80 1 28.930TEST G-OPERATING MAXIMUM LOAD

12.30 1 3022 1 1.53 1 1843 I 14.81 1 Not Recorded 1 200 1 78 I28.92021.2~OI25i9l3J6T18511J:0361 Not Recorded 1 204 1 78 1 28.93021.59 I 1851 1 4.37 I 1848 1 6.86 1 .. .. Not Recorded.. .. I 205 175r28.930~19.811 661 1 11.24 [ 1849 1 2.67 1 Not Recorded. . . .. 1 203 [ 82 1 28.920

TEST H-RATED LOAD-TEN HOURS-3rd Gear

17.43 I T47fl-4.43 11849 1 5:6fl~i:8591 9.38 1 0.653 1 0.04 1197 1 70 1 28.800

TEST J-OPERATING MAXIMUM LOAD-3rd Gear

20.01 1 1801 I 4.17 1 1850 1 11.72 I Not Recorded I 211 I 99 I 28.460

TIRES, WHEELS AND WEIGHTTests F, G & H Test J

NEBRASKA TRACTOR TEST NO. 503

JOHN DEERE 40

FUEL, OIL and TIME Gasoline octane No ASTM76 Research 82 (rating taken from oil company'stypical inspection data); weight per gallon 6.120 lb.OIL SAE 10; to motor 1.220 gal; drained from motor0.821 gal; Total time motor was operated 74 hours..

CHASSIS TYPE Tricycle Serial No 67273 Treadwidth rear 47 y." to 96" front 6 11/ 16" to 11 13 / 16"Wheel base 82 y." Hydraulic control system directengine drive Advertised speeds mph first 1 Ys second3 Ys third 4 Y. fourth 12 reverse 2 Yz Belt pulley diam91/16" face 6 %" rpm 1267 Belt speed 3006 fpmClutch s;ngle plate dry disc clutch operated by footpedal Seat upholstered seat with back rest Brakesdouble d;sc brakes operated by two foot pedals Equal-ized by foot act;on Power take-off standard type.

ENGINE Make John Deere Type 2 cyEnder verticalSerial No 79421 Crankshaft mounted lengthw;seHead I Lubrication pressure Bore and Stroke 4" x 4"Rated rpm 1850 Compression ratio 6.50 to 1 Displace-ment 101 cu. in. Port Diameter Valves Inlet 131/64"Exhaust 1 23/64" Governor var;able speed centrifugalCarburetor Size 1" Ignition System battery Startingsystem 6 volt battery Air Cleaner oil washed wiremesh Muffler was used Oil Filter replaceable treatedpaper element Cooling medium temperature controlthermosiphon.

REPAIRS AND ADJUSTMENTS: No repairs oradjustments.

REMARKS All test results were determ;ned fromobserved data and without allowances, add;tions ordeductions. Tests Band F were made with carburetorset for 100% maximum belt horsepower and datafrom these tests were used ;n determ;ning the horse-power to be developed in tests D and H, respect;vely.Tests C, D, E, G, H, and J were made with anoperating setting of the carburetor (selected by themanufacturer) of 95.8 of maximum belt horsepower.

Following Test A a decrease in horsepower oc-curred, engine head was removed and combustionchamber cleaned. Test was continued with improvedperformance.

HORSEPOWER SUMMARY

Draw-bar Belt

1. Sea level (calculated) maximumhorsepower (based on 600 F and29.92" HG) 22.88 25.23

2. Observed maximum horsepower(tests F & B) 21.71 24.25

3. Seventy-five per cent of calculatedmaximum drawbar horsepower ande;ghty-fjve per cent of calculatedmaximum belt horsepower (for-merly AsAE and SAE ratings) 17.16 21.45

We, the undersigned, cert;fy that th;s is a trueand correct report of official tractor test No. 503.

L. F. LARSENEngineer-in -Charge

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

Board of TractorTest Engineers

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Rear wheelsType Pressed steel Pressed steel

_LJquid ballast270 Ib each None

Added cast iron 405 Ib each None

Rear tiresNo. and size Two 9-34 Two 9-34

Ply 4 4

Air pressure 18 Ib 12 Ib

Front wheelsType Pressed steel Pressed steel

Liquid ballast None None

Added cast iron None None.

Front tiresNo. and size Two 5.00-15 Two 5.00-15

Ply 4 4

Air pressure 28 Ib 28 Ib

Height of drawbar 17 Yz inches 18 inches

Static weightRear end 3480 Ib 2130 Ib

Front end 898 110 914 110

Total weight as testedwith operator 4553 Jb 3219 110

EXPLANATION OF TEST REPORT

TEST A: The manutacturer'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 hdd 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 :Ire 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 con-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,Y4and % rated 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

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so 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 excessive wheel 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. Rateddrawbar 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 drawbar horsepower.

TEST K: Similar to test J except that the smallest tiresand lightest wheels offered by the manufacturer are used.

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