2D ENGINE POWERPLANT TESTS (GROUND HOP) (Sheet 5 of 15)
Take all necessary safety precautions to eliminate possible
injury to personnel or damage to equipment. Stand clear of
transmission output flanges whenever the engine is running.
Start and operate engine until normal operating temperatures are reached (TM 9-2350-222-10).
Check tachometer for indication of 700-750 rpm. If indication is not within range, adjust idle
adjusting screw according to steps 3 thru 6.
Using 1/2 inch wrench, loosen jamnut on idle adjusting screw.
Using 1/2 inch wrench, adjust idle adjusting screw until 700-750 rpm shows on tachometer.
Using 1/2 inch wrench, tighten jamnut.
Install 3/16 inch end of throttle linkage adjusting gage between stop pin and bracket shoulder. If
distance is not a minimum of 3/16 inch, notify support maintenance.
Check tachometer. If indication is not between 700-750 rpm, notify maintenance supervisor.
Go on to Sheet 6