Idle Speed Adjustment - TM-10-3930-634-340045

TM 10-3930-634-34

NOTE

3-13. Air Inlet Housing

To check engine RPM with engine installed in

a. General. The air inlet housing is mounted on the

forklift truck, remove left rear engine idler

side of the blower. It contains an air shutdown valve

s h a f t gear cover and hold a mechanical

that shuts off air supply and stops the engine when-

"hand-held" tachometer against the end of

ever abnormal operating conditions require an emer-

the idler shaft while engine is running. An ac-

gency shutdown.

curate indication of engine RPM will be ob-

tained since the idler shaft turns at engine

speed. Some engine oil will splash out of the

area, however very little.

(4) Idle Speed Adjustment.

(a) Start the engine and when normal operating

temperature is maintained back out the buffer screw

to avoid contact with the differential lever. Loosen

lock nut and turn the idle speed adjusting screw until

the engine idles at 500 rpm (fig. 3-14).

(b) Hold the idle screw and tighten the lock nut.

ing.

(5) Buffer Screw Adjustment.

(a) With the engine running at normal tempera-

ture, turn the buffer screw in so it contacts the differ-

ential lever as lightly as possible and still eliminates

the engine roll (fig. 3-14).

(b) Recheck the maximum no load speed. If it

has increased more than 25 RPM, back off the buffer

screw until the increase is less than 25 RPM.

be 500 to 515 RPM.

(d) Hold the buffer screw and tighten the lock

nut.