Piper PA-24 Comanche Service Manual page 306

PIPER COMAI"CH£ SERVICE MANl:AL
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• FlGl'RE 7-5. HARTZELL PROPELLER GOVERNOR ADJUSTMENT
POI~TS
7-:!O. Adjustment of Propeller Governor. (Hartzell) (Refer to Figure 7-5.)
a. Start the engine in accordance with the directions given in the Owners Flight Manual and allow to
"arm up.
b. Push the "PROPE LLER" cockpit control as far as it will go. At this position the governor
speed adjusting control lever will be against the hi-rpm fine adjusting sere".
c. Observe engine speed. Adjust the governor by means of the fine adjustment screw for
~700
rpm.
To do this. release the fasteners and lift the side engine cowling. Loosen the fine adjustment screw locknut
and turn the hi-rpm fine adjustment screw in a clockwise direction to decrease engine speed and a counter-
clockwise rotation to increase engine speed. One revolution ofthe fine adjustment screw increases or decrease-
the propeller speed approximately 15 RPM.
d. After setting the engine rpm at 2700. run the self-locking nut on the fine adjustment sere" against
the base projection to lock.
e. With the high RPM adjustment complete. the control system should be adjusted so that the
governor control arm will contact the high RPM stop when the cockpit control is ,062 of an inch from its
full forward stop. To adjust the control travel, disconnect the control cable end from the governor control
arm. loosen the cable end jam nut and rotate the end to obtain the desired control clearance, Reconnect the
cable end and lighten jam nut.
f.
It
is usually only necessary to adjust the high R PM setting of the governor control system. as the
action automatically takes care of the positive high pitch setting,
g. Fasten the cowling on both sides.
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ISSl'ED: 8/18/72
2A22
POWER
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