Piper Cherokee Six - Page 370

PIPER CHEROKEE SIX SERVICE MANUAL
d. With the governor in position, raise the governor enough to install washers and start
mounting
nuts. Torque
nuts evenly.
e. Connect the control cable
end to the governor control arm.
The ball stud is installed
in
the inner hole
of the control
arm.
f. Adjust
governor control per
paragraph 7-13.
g. Install engine cowl.
7-13. RIGGING AND ADJUSTMENT OF PROPELLER GOVERNOR. (Refer to Figure
7-3.)
a. Start engine, park
90 to wind direction and warm
in normal manner.
b. To check high RPM,
low pitch setting, move the propeller
control all the way
forward. At this position the governor speed control arm (1) should be against the high RPM
fine adjusting screw (2). With the throttle full forward, observe engine RPM, which should
be 2700 RPM
with high RPM properly
adjusted.
c. Should
engine RPM not be as required, the
high RPM setting should be adjusted
as
follows:
1. Shut down the
engine and remove the upper
engine cowl.
2. Adjust the governor by means of the fine adjustment screw (2) for 2700 RPM.
To do this, loosen the high RPM fine adjustment screw locknut and turn the screw in a
clockwise direction to decrease engine speed or in a counterclockwise direction to increase
engine speed.
NOTE
One revolution of the fine adjustment screw will increase or
decrease the engine speed approximately 20 RPM.
3. Reinstall upper engine cowl and repeat step b to ascertain proper RPM setting.
4. After setting the proper high RPM adjustment, run the self-locking nut on the
fine adjustment screw against the base projection to lock.
5. Ascertain that the governor control arm (1) is adjusted to the proper angle on
the control wheel (3) as shown in Figure 7-3.
d. 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 knob is
0.0625 to 0.125 of an inch from hitting the face of the instrument panel with Serial Nos.
32-1 to 31-1110 inclusive. Airplanes with Serial Nos. 32-1111 and up, control system
adjustment clearance
is 0.010 to 0.030 of an inch from
forward stop on the power
quadrant. To adjust the control knob travel, disconnect the control cable end from the
control
arm, loosen the cable end jam nut
and rotate the end to obtain the desired
level
clearance. Reconnect the cable end and tighten jam nut.
e. It is usually only necessary to adjust the high RPM setting of the governor control
system, as the action automatically takes care of the positive high pitch setting.
Revised: 7/29/77
POWER PLANT
2E22