Piper COMANCHE PA-24-180 Service Manual page 302

7-11. Intllaion Of ropeller. (McCauley) (Refer to Figure 7-1.)
CAUTION
Ascertain the Master Switch and Magneto Switch are in the "OFF"
position and the Mixture Control is in the "IDLE CUT-OFF" position.
a
Postion the spinner bulkhead ring (5) aimn the sarer rng gear support (4) o that one arrow
lines up with the TC1, on the front face of the upport.
b. Secure the spinner bulkhead to the suerring gear uppor with 12bolts(1), 12 nuts(3), and 24
wahers (2) (one under the bolt bead and one under each nut). Carefully tighten nuts uniformly to torque
limis shown in Table VI-I.
c. Clean the propeller and engine flanges.
d.
Observe the srter
ri , ear to make ure it is mounted properly on the engine crankshaft flange.
The crankshaft flange is stamped with an "O" muak and the starter ring gear is likewise identified by an
"0" mark. Upon installation of the starter ring gear, te
marking shall be mated to insure proper
installation.
e.
Inser the "0" ring (6) in the groove of the propeller hub bore. Make sure that the "" ring is not
twisted and is liberally coated with clean lubricating oil.
NOTE
Some McCauley Model 2D36C14 propellers will be found i use with a
counterbore
i
the hub instead of an "O" ring groove. When installing
these propellers, always uert the "0" ring in the counterbore and push
it to the bottom. Never slide the "0" nng on the crankshaft pilot.
f.
Raise the propeller and line up the arrows on the hub flange outer diameter with the shore bushing
in the crankshaft flange. Engage the pilot in the hub. making sure that face of hub flange is parallel with the
face of me crankshaf flange, then push the propeller in. Make sure that the bolt holes engage the bushings.
CAUTION
It is important that the propeller be seated against the crankshaft flange
with a straight push. Rotating or cocking it on will cause damage to the
"O" ring and oil leakage will result. Particular care must be taken while
installing hubs having a counterbore to prevent damaging the "0" rng
or displacing it so that it is lodged between the flange faces. The latter
condition will be indicated by noncacking of the blades immediately
after installation.
POWER PLANT
ISSUED: 8/18/72
2 A16
PIPER COMANCHE SERVICE MANUAL