Propeller Governor; Rigging And Adjustment Of Propeller Governor - Piper Cherokee SIX 300 Service Manual

PIPER CHEROKEE SIX SERVICE MANUAL
"blade-shake" travel, making small marks with a pencil at each position. Then center the tip
between these marks and scribe a line on the board for the full width of the tip.
b. Carefully rotate propeller by hand to bring the opposite blade down. Center the tip
and scribe a pencil line as before and check that lines are not separated more than .0625
inch.
c. Propellers having excess blade track should be removed and inspected for bent
blades, or for parts of sheared "O" ring, or foreign particles, which have lodged between hub
and crankshaft mounting faces. Bent blades will require repair and overhaul of assembly.
7A-8. PROPELLER GOVERNOR.
7A-9. REMOVAL OF PROPELLER GOVERNOR.
a. Remove the upper engine cowl.
b. Disconnect the control cable end from the governor control arm.
c. Remove the governor mounting stud nuts. It will be necessary to raise the governor
as the nuts are being removed before the nuts can be completely removed.
d. Remove the mounting gasket. If the governor is to be removed for a considerable
length of time and another unit not substituted, it is advisable to cover the mounting pad to
prevent damage caused by foreign matter.
7A-10. INSTALLATION OF PROPELLER GOVERNOR.
a. Clean the mounting pad thoroughly, making very certain that there are no foreign
particles in the recess around the drive shaft.
b. Place the governor mounting gasket in position with the raised portion of the screen
facing away from the engine.
c. Align the splines on the governor shaft with the engine drive and slide the governor
into position.
d. With the governor in position, raise the governor enough to install washers and start
mounting nuts. Torque nuts even.
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 7A-11.
g. Install engine cowl.
7A-11. RIGGING AND ADJUSTMENT OF PROPELLER GOVERNOR. (Refer to Figure
7A-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.
POWER PLANT
Issued: 8/17/72
2G10