TM 5-3805-281-24-2
Engine Rebuild, Break-In, and Tune-Up
DYNAMOMETER TEST
NOTE: High elevations may affect engine performance.
(See EFFECTS OF ALTITUDE AND
TEMPERATURE ON ENGINE PERFORMANCE,
earlier in this group.)
1. Connect engine to dynamometer using manufacturer's
instructions.
2. Operate engine at one-half load until coolant and
crankcase oil temperatures are up to normal.
3. Run engine at fast idle.
4. Gradually increase load on engine until speed is
reduced to rated speed rpm.
5. Read horsepower on dynamometer and record
reading.
6. Compare readings taken with power rating level for
your engine application. OEM power units are shown
below.
NOTE: Refer to appropriate machine technical manual for
average power ratings of vehicle applications.
Allow 5% for minimum and maximum power.
Altitude and temperatures can also affect power
levels. (See chart on next page.)
RG,RG34710,1062
1923OCT971/1