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-
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.
(c) Install the high speed spring retainer hous-
(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.
(c) Recheck the idle speed. The idle speed must
be 500 to 515 RPM.
(d) Hold the buffer screw and tighten the lock