CLEANING, INSPECTION, AND REPAIR OF PROPELLER (figure 61-1)
1. Check for oil and grease leaks.
2. Clean spinner, propeller hub interior and exterior, and blades with a non-corrosive solvent.
3. Inspect hub parts for cracks.
4. Steel hub parts must not be permitted to rust. Use aluminum paint to touch up or replace during
overhaul.
5. Check all visible parts for wear and safety.
6. Check blades to determine whether they turn freely on hub pivot tube as follows:
a. Rock blades back and forth through slight freedom allowed by pitch change mechanism.
b. If they appear tight and are properly lubricated, remove pitch change mechanism so that each
blade can be checked individually.
c. If blades are tight, propeller should be disassembled.
7. Inspect blades for damage or cracks.
a. File out nicks in leading edges of blade and round out all edges.
b. Use fine emery cloth for finishing. (Refer to figure 61-1 for propeller blade care.)
c. Sand lightly and paint each blade face, when necessary, with a flat black paint (to retard glare).
d. Apply light application of oil or wax to surfaces to prevent corrosion.
8. For severe damage, internal repairs, and replacement of parts, refer propeller to Hartzell Factory or an
authorized Service Station.
—CAUTION—
Be careful when greasing propeller hubs. Apply grease slowly to
prevent blowing out hub gaskets.
9. Grease blade hub through zerk fittings. Remove one of two fittings for each propeller blade, alternate
the next time. Apply grease through other zerk fitting until fresh grease appears at fitting hole of
removed fitting.
10. Check condition of propeller mounting nuts and studs.
INSTALLATION OF PROPELLER
—WARNING—
Master and magneto switches must be OFF before any work is
done on the propeller assembly.
1. Ensure master and magneto switches are OFF.
2. Place fuel selector in OFF position.
3. Place mixture control in IDLE CUT-OFF.
4. Check starter ring gear to make sure it is mounted properly on engine crankshaft flange. One bushing
on the crankshaft is stamped with an O mark and it must be inserted in the starter ring gear hole, also
marked with an O mark.
5. Wipe crankshaft and propeller pilot to assure that no chips or foreign matter enter propeller
mechanism.
6. Check interior of propeller hub for proper seating of O-ring. Wipe inside to remove any traces of dirt.
Check to see that O-ring is covered with grease.
7. Raise propeller into position so that each stud mates with an engine flange bushing and screw each
stud in a few threads at a time until all are tight. Tighten studs to a torque of 60 - 70 foot-pounds.
8. Check propeller blade track. (Refer to Blade Track.)
9. Safety propeller mounting bolts with MS20995-C41 safety wire.
10. Install spinner, tighten attachment screws to a torque of 35 to 40 inch-pounds.
61 - 11 - 00
Page - 61-02
Reissued: August 1, 1986
2H5
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
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