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TM 10-3930-638-24&P
3-5. ENGINE MAINTENANCE (cont)
a. Engine Tune-up (cont).
(3) Fuel Injection Pump Adjustments (cont).
REMARKS
ACTION
ITEM
LOCATION
STEP
INJECTION PUMP -- TIMING ADJUSTMENT (cont)
1
(cont)
NOTE
Do not use calibration marks in the following step. Use marks
in injection pump timing window only.
Until timing marks in timing window are
Rotate
e. Injection pump
in line
NOTE
To advance timing, rotate top of pump away from engine. To
retard timing, rotate top of pump toward engine.
Torque to 35-42 pounds foot torque
f. Three pump mounting Tighten
nuts
Repeat steps a and c above until timing
g. Injection pump timing  Recheck
marks are in line
On injection pump
Position
h. Timing window cover
and new gasket
Until timing window cover is securely
Install and
i. Cover screws
mounted
tighten
ENGINE IDLE SPEED ADJUSTMENT
Start engine and operate until normal
Warm-up
a. Engine
Fuel injection
2
operating temperature is reached
pump
With engine idling, press conical tip
Position
b. Tachometer
against tachometer drive shaft on engine
until tachometer hand stops moving,
then note reading
3-34

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