Fuel Injection Pump Adjustments (cont).

TM 10-3920-638-24&P

3-5. ENGINE MAINTENANCE (cont)

a. Engine Tune-up (cont).

(3) Fuel Injection Pump Adjustments (cont).

REMARKS

ITEM

ACTION

LOCATION

STEP

ENGINE IDLE SPEED ADJUSTMENT (cont)

e. Idle speed screw

Cut and remove

wire seal

(cont)

f. Lock nut

Loosen

g. Idle speed screw

Adjust

Adjust 1/2 turn at a time and recheck

engine idle speed. Repeat until engine

idles at 825-850 RPM

NOTE

Turn idle speed screw out (counterclockwise) to decrease engine

speed. Turn idle speed screw in (clockwise) to increase engine

idle speed.

Tighten

While holding idle speed screw

h. Lock nut

i. New wire seal

Install and seal

On idle speed screw

ENGINE NO-LOAD GOVERNED SPEED ADJUSTMENT

Fuel injection

a. High speed screw

Check

Check if high speed screw is against the

pump

injection pump boss while an assistant

fully depresses the accelerator pedal. If

screw is not against pump boss, adjust

accelerator cable ball joint (para 2-15i)

Start engine and operate until normal

Warm-up

b. Engine

operating temperature is reached

3-36