14-1. SHOULDER-HARNESS INERTIA REEL ADJUSTMENT.
a. Allow the harness to wind up on the reel as much as possible.
b. On the end of the reel, pry off the plastic cap over the spring, making sure the spring does not come out of
the plastic cap, set cap aside.
c. Unwind the harness completely, then measure and mark the harness 24 inches from the reel center.
d. Wind the harness onto the reel until the 24 inch mark is reached, then hold reel and place cap with spring
over the reel shaft end.
e. Aligning slot in shaft with spring tang, wind spring 6 turns ±1/2 turn and snap the plastic cover into holes
in reel end shaft.
f. Release harness and allowing it to wind up, extend the harness a few times to check reel for smooth
operation.
g. With reel fully wound, hold with inertia mechanism end up and pry off plastic cap over mechanism and set
reel aside.
h. Install nut in plastic cap so that stud in cap is flush with nut surface, then reposition cap over reel end and
orientating properly, snap in place. Extend harness a few times to make sure action is correct.
14-2. OVERHEAD VENT BLOWER.
14-3. DESCRIPTION. The blower is mounted in the aft section of the fuselage and is connected to the overhead
vent system. The blower draws air in from the dorsal fin and forces it through the ducting, whenever desired.
14-4. REMOVAL OF BLOWER ASSEMBLY.
a. Remove the access door from the aft wall of the cabin area.
b. With the master switch off, disconnect the plug assemblies at the blower assembly.
c. Remove the inlet and outlet hoses from the blower assembly by removing the clamps.
d. Remove the screws, washers and nuts that secure the blower assembly to the hangar braces.
e. Remove the screws and washers which secure the blower assembly to the retainer and hangars.
f. Remove the blower assembly from the aircraft.
14-5. DISASSEMBLY OF BLOWER ASSEMBLY.
a. Remove the hose duct from the forward edge of the blower assembly by removing the nuts, washers and
screws.
b. Remove the cover from the blower assembly by removing the nuts, washers and screws.
c. Remove the blower fan from the motor shaft by removing the set screw.
d. For removal of the motor, preceed as follows:
1. Separate the plate from the motor cover by carefully drilling out the connecting rivets.
2. Cut the motor wires at the edge of the receptacle and plug and remove the wire ends from the blocks.
3. Remove the motor from the mounting plate by removing the nuts, washers and bolts.
14-6. REASSEMBLY OF BLOWER ASSEMBLY.
a. Mount the motor on the plate and secure it with the bolts, washers and nuts. Be sure that the motor nuts
are snug and the shaft spins freely.
b. Position the cover over the motor plate with the motor wires protruding through the cover grommet.
c. With the holes in the cover matching the holes in the motor plate, secure the two parts together with rivets.
d. Apply PRC-5OOO sealant to fill any opening left after the wires are brought through the grommet.
e. Install the wires in the plug and receptacle according to Table XIV-V
f. Position the blower fan on the motor shaft and secure with set screw.
PIPER AIRCRAFT
PA-28-161 CADET
AIRPLANE MAINTENANCE MANUAL
Issued: FEBRUARY. 28, 1989
ACCESSORIES AND UTILITIES
2G15
