Figure 3-8. Voltage regulator adjustment (sheet 4 of 5).

TM 10-3930-634-34

speed position.

(d) Stop the engine and remove the governor

cover and the rocker covers.

fuel position.

NOTE

(2) Injector Timing. Time the fuel injectors as de-

The engine must be controlled manually dur-

ing the adjustment procedures, therefore care

d. Governor Adjustment.

must be exercised to prevent overspeeding.

(1) Governor Gap Adjustment.

(e) Start and run the engine, between 800 and

(a) With the engine stopped and at normal op-

1000 rpm by manual operation of the differential

erating temperatures, remove the spring housing (fig.

lever.

(f) Check the gap between the low speed spring

CAUTION

cap and the high speed spring pluger with a 0.0015 -

Do not back the buffer screw out beyond the

inch feeler gage. If the gap setting is incorrect, loosen

limits listed below, or the control link lever

the gap adjusting screw lock nut and reset the gap ad-

may disengage the differential lever.

justing screw. If the setting is correct the 0.0015-inch

(b) Back out the buffer screw until it extends 9/16

movement can be seen by placing a few drops of engine

to 5/8 inch from the surface of the governor housing.

oil into the governor gap and pressing a screwdriver

against the gap adjusting screw. Movement of the cap

ing lock nut. Then adjust the iddle screw (fig. 3-14) to

toward the plunger will force the oil from the gap in

the form of a small bead.

obtain desired engine idle speed (600 rpm).

3-11