Hydraulic System Maintenance Instructions (Cont)
20-6. ANCILLARY EQUIPMENT ENGINE IDLE SPEED ADJUSTMENT (M984) (CONT).
Disconnect airhose (5) from high speed spring retainer cover (6).
Remove two screws (7), lockwashers (8), high speed spring retainer cover (6), and gasket (9).
Loosen idle speed locknut (10).
Record number of turns (approximately 7 to 8).
Turn adjusting screw (11) clockwise until snug.
Tighten idle speed locknut (10).
Loosen high speed locknut (12).
Install turbocharger inlet air shield on air inlet port (13).
Use extreme care when working around air inlet. Hands and tools may be
pulled in causing personal injury or death.
Wear ear protection when running engine. Noise volume of engine can cause
hearing loss or injury.
Do not touch hot engine with bare hands. Manifolds and covers are hot and
can cause severe burns if touched.
Run engine in clean area when air intake ducting is removed. Dirt, dust, and
particles in unfiltered air can enter engine intake. Dust in engine can damage
parts and cause mechanical failure.
This task requires two soldiers; one to operate engine, and one to make
Start engine (TM 9-2320-279-10).
Operate engine for 15 minutes.
Engage PTO switch (TM 9-2320-279-10).
Activate ENGINE HIGH IDLE (TM 9-2320-354-10).