Figure 8-5. Propeller Governor
8-12. CHECKING PROPELLER BLADE TRACK. Blade track is the ability of one blade tip to follow the
other, while rotating, in almost the same plane. Excessive difference in blade track - more than .0625 inch may
be an indication of bent blades or improper propeller installation. Check blade track as follows:
a. With the engine shut down and blades vertical, secure to the aircraft a smooth board just under the tip
of the lower blade. Move the tip fore and aft through its full “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.
8-13. PROPELLER GOVERNOR.
8-14. REMOVAL OF PROPELLER GOVERNOR. The propeller governor is mounted on the lower left
forward portion of the engine crankcase. Remove the governor as follows:
a. Remove the lower cowl to gain access to the governor.
b. Disconnect the governor control cable end from the governor control arm.
c. Remove the governor mounting nuts and withdraw the governor from the mounting pad. Cover the
mounting pad to prevent foreign material from entering the engine.
Revised: 8/31/77
2A17
CHEROKEE ARROW III SERVICE MANUAL
POWER PLANT - CONTINENTAL
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