TM 9-2320-272-24-2
4-34. INJECTOR PLUNGER AND VALVE ADJUSTMENTS (TORQUE METHOD)
THIS TASK COVERS:
b. Injector and Valve Adjustment
a. Pre-adjustment Setup
INITIAL SETUP:
APPLICABLE MODELS
EQUIPMENT CONDITION
l Valve crossheads adjusted (para. 4-30).
M939/A1
l Rocker lever housing covers removed (para. 4-32).
SPECIAL TOOLS
l Rocker lever housing covers removed (in-vehicle)
Barring tool (Appendix E, Item 8)
l Fuel shutoff handle pulled
TOOLS
(TM 9-2320-272-10)
l Battery ground cables disconnected (para. 3-126).
General mechanic's tool kit (Appendix E, Item 1)
Torque wrench (Appendix E, Item 144)
GENERAL SAFETY INSTRUCTIONS
Torque wrench adapter (Appendix E, Item 143)
Torque wrench (Appendix E, Item 142)
If task is being performed while engine is in vehicle,
ensure fuel shutoff handle is pulled and battery
Wire gauge
ground cables are disconnected to prevent engine
Feeler gauge
starting.
REFERENCES (TM)
TM 9-2320-272-10
TM 9-2320-272-24P
a. Pre-adjustment Setup
If task is being performed while engine is in vehicle, ensure fuel
shutoff handle is pulled and battery ground cables are disconnected
to prevent engine starting. Failure to do this may result in injury
to personnel.
NOTE
l Injector plungers are adjusted before valves are adjusted.
l Loosening all injector rocker lever adjusting screws and
locknuts will help indicate difference between cylinders that
have been adjusted and those cylinders still needing
adjustment.
1.
Loosen six locknuts (3) on injector rocker levers (1) and adjusting screws (2) one full turn.
2.
Rotate engine in gearcase (4) in direction of operating rotation until timing marks 1-6 VS on
accessory drive pulley (5) align with pointer (6).
4-254
