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TESTED SEPT 18 to SEPT 22 1956 serial# 7200022 TEST LASTED 45 1/2 hours. MAX HP 56.66. fuel used 3.153 gal per hr. MAX TORQUE @ 65% rpm @ 116% HP-HR per gal was 17.97 (how much HP a tractor could get out of a gal of fuel in 1 hr.) Part throttle below means that the 720 had wheel slip more then 16% and it was trottled back till slip went below 16%. (So that the engine would lug to rated 1125 RPM's and have wheel slip below 16%) 1st Gear: HP 20.83, LBS pulled 6547#, speed 1.19 MPH, wheel slip 16.3% (PART TROTTLE) 2nd Gear: HP 33.91, LBS pulled 6442#, speed 1.97 MPH, wheel slip 14.23% (PART TROTTLE) 3th Gear: HP 48.44, LBS pulled 5633#, speed 3.23 MPH, wheel slip 10.97% 4th Gear: HP 51.66, LBS pulled 4644#, speed 4.17 MPH, wheel slip 7.85% 5th Gear: HP 50.24, LBS pulled 3405%, speed 5.53 MPH, wheel slip 5.26% 6th gear: HP 47.58, LBS pulled 1589#, speed 11.23 MPH, wheel slip 2.23% ABOVE TESTS were with 15.5 X 38 tires and the tractor weighted 9241# 669# of liquid ballast in each tire, no cast weigths. (7020# on the rear end and 2046# on the front end.) Tractor was also tested with 13.6 tires and no added weight. Tractor weighted 7861# (5645# on the rear end and 2040# on the front end.) In 4th Gear it put out 49.25# and pulled 4680# with a wheel slip of 12.17% Observed HP was 51.66 on the drawbar and 56.66 on the belt. When calclated for sea level, air temp and humidty it cane in at 53.66 HP on the drawbar and 58.84 on the belt. The calclated HP was so that all tractors was on the same standard so tractor to tractor could be compaired no matter what the weather was.
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