Piper COMANCHE PA-24-180 Service Manual page 442

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PIPER COMANCHE SERVICE MANUAL
7C-10 Cleaning, Inspection And Repair Of Propeller. (Refer to Figure 7C-2.)
a. Check for oil and grese leaks.
b. Clean the spinner, propeller hub and blades with a non-corrosive solvent.
c. Inspect the hub parts for cracks.
d. Steel hub parrs should nor be permitted to rust. Use aluminum pant to touch up. if necessary, or
replace durng overhaul.
e. Check all visible parts for wear and safety
f.
Check blades to determine whether they turn freely on the hub pivot rube. This can be done by
rocking the blades back and forth through the slight freedom allowed by the pitch change mechanism. If
they appear tght and aze properly lubricated. the propeller should be disassembled by an aurnonzed
Service Center.
g. Inspect blades for damage or cracks. Nicks in leading edges of blades should be filed out and all
edges rounded, as cracks sometimes start from such places. Use fine emery cloth for finishing
h
It is recommended that for severe damage. internal repairs and replacement of pats, the propeller
should be referred to the Manufacturer or a Certified Repair Station.
i.
Grease blade hub through zerk firing. Remove one of the two fittings for each propeller blade.
alernate the next time. Apply grease through the zerx fitting until fresh grease appears at the fitting hole of
the removed fitting Care should be taken to avoid blowing out hub gaskets.
POWER PLANT
ISSUED: 8/18/72
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