TM 5-3810-300-24&P-3
14.5 FUEL MODULATING GOVERNOR ADJUSTMENT
very slightly IN or p: OUT to produce the final 1/64"
clearance illustrated in Fig. 7, which is required after the
Allen screw has been tightened. Tighten the lock nut
(49); also install the plugging screw (51).
CAUTION: The adjustment of the
modulating cam is extremely important
and must be carefully and accurately
performed.
No. 5-Injector Rack Setting
Preliminary Adjustment
A
Manually hold the control lever in the full throttle
position, Fig 8.
B
Loosen all of the inner and outer injector rack
Fig. 6 - Closing Modulator Gap with Special Screw
control lever adjusting screws.
B
Set the high speed adjusting screw (38) to extend
Adjustment No. 5
3/4" beyond the high speed screw lock nut (37)
when the nut is tight against the housing, Fig 2.
A
Turn down the inner adjusting screw of the No 1
injector rack control lever.. Adjust the No. 1
C
Temporarily install the cap screw (1/2"-13 x 2") into
injector rack control lever, Fig 8, so that a very light
the front of the control housing and thread the
finger tip pressure at the coupling will produce a
screw inward until the gap between the low speed
tendency to roll, but the coupling should not be
cap (61) and high speed spring plunger (39) just
loose.
closes, Fig 6. Be careful that the high speed spring
plunger is not moved.
B
Turn down the outer adjusting screw until it bottoms
on the control tube. After the outer adjusting screw
D
Loosen the inner and outer adjusting screws at
has bottomed, tighten the inner and outer adjusting
each injector rack control lever until each lever is
screws alternately until the injector control lever is
free on the control tube.
held firmly in position.
E
Install the cover to governor control housing gasket
Install the control housing cover assembly, being
sure that the throttle shaft pin is between the
differential lever (35) and the torsion spring (36).
Secure the cover with the four screws and lock
washers.
Adjustment No. 4
Use an Allen wrench and loosen the cam lock screw (50)
only enough (1/8 turn) to permit turning the cam
adjusting screw (48) with the fingers. If the lock screw is
backed out further, the cam may be released and turned
by its own weight out of the operating position.
With the control lever in the full throttle position, Fig. 7,
thread the cam adjusting screw (48) outward with the
finger tips until the cam (47) can be felt bottoming
against the roller on the bottom of the differential lever
(35). Thread the cam adjusting screw outward an
additional 1,/8 turn to provide positive engagement
Fig. 7 - Modulating Cam Adjustment
between the differential lever roller and the cam. After
making contact, it may be necessary to turn the screw
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