Piper CHEROKEE WARRIOR PA-28-151 1995 Maintenance Manual page 241

PIPER CHEROKEE WARRIOR SERVICE MANUAL
8-7. INSTALLATION OF PROPELLER. (Refer to Figure 8-2.)
If the propeller-engine combination feels rough on initial
r u n-up or flight, propeller may be rotated 180° from initial
installation.
a. Insure magneto switch is OFF.
b. Place the alternator drive belt in the groove of the starter ring gear and position the starter gear on
the flange of the crankshaft. Ascertain that the stamped "O" on the gear is aligned with the "O" on the crank-
shaft flange.
c. Install the propeller spinner back plate or bulkhead on the starter ring gear.
d. Rotate crankshaft until the top center (TC) mark on the starter gear and the crankcase parting
flange or the index mark on the starter housing are aligned.
e. On model PA-2 8-151 with McCauley propeller (1C160/EGM7653) or Sensenich propeller
(74DM6-0-58), install propeller with tips pointing at the two and eight o clock position, when viewed from the
cockpit or by indexing number one propeller blade counterclockwise one hole from the engine ring gear "∆"
mark.
f. On model PA-28-161 (Sensenich - 74DM6-0-60), install propeller by indexing number one pro-
peller blade over "O" mark on ring gear support.
g. Place the doubler in position. Install and tighten each propeller bolt, with washer, finger tight.
Use a torque wrench for final tightening and tighten in sequence so that all bolts are pulled down evenly,
(Refer to Table VIII-I for specific torque requirements.)
h. Check the propeller blade track as given in Paragraph 8-8.
i. Safety the propeller mounting bolts with MS20995-C41 wire.
j . Install the spinner and torque attachment screws per Table VIII-I. On PA-2 8-1 6 1 's Serial Nos.
2 8 -7916001 and up, the minimum allowable gap between propeller and spinner components is .040 inch.
k. Adjust alternator drive belt as given in Checking Alternator Belt Tension, Section XI.
8-8. 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 0.062 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 0.062 inch.
c. Propellers having excess blade track should be removed and inspected for bent blades. Bent
blades will require repair and overhaul of assemble.
8-9. ENGINE.
8-10. REMOVAL OF ENGINE. (Refer to Figure 8-3.)
Place a tail stand under the tail of the airplane before
r e m o ving the engine.
Revised: February 28, 1995
NOTE
CAUTION
1K1
Island Enterprises
POWER PLANT