TUBE AS 3768056 - Caterpillar

General Information
U.S. Horsepower
One U.S. (English horsepower is equal to the work done in exerting 33,000 ft. lbs. of torque over a period of one minute.Metric Or DIN Horsepower
One metric or DIN horsepower is equal to the work done in exerting 4,500 Kg/m of torque over a period of one minute.Kilowatt
One kilowatt is equal to the work done in exerting 44,200 ft. lbs. of torque over a period of one minute.The mathematic relationship between these three systems of power measurement are: HP or BHP will always, in this manual, indicate the U.S. unit of measure.It is not within the scope of this manual to illustrate and compare all of these ratings, therefore, we have elected to limit our discussion to the applicable American SAE, and German DIN, standards.SAE is the acronym for Society of Automotive Engineers and DIN is the acronym for Deutsche Industrie Normen, or German Industrial Standards.The following table compares production tolerance, combustion air temperature and atmospheric pressure conditions imposed by the applicable standards.