Piper Arrow IV Turbo Maintenance Manual page 164

AIR CONDITIONING THROTTLE SWITCH.
This switch is responsible for shutting down the air conditioning system when the airplane is at full throttle
enabling maximum performance. On the PA-28RT-201 model the switch is behind the control quadrant and is
actuated by the throttle lever. With throttle against full open stop adjust switch so that .040 ± .010 clearance is
obtained. (Refer to Figure 21-20.) On the PA-28RT-201T the switch is in back of the instrument panel in the
manifold pressure gauge line. No adjustment is necessary.
FUSE REPLACEMENT.
There are three fuses located behind the air conditioning system control panel. A 20 amp circuit breaker
mounted in the circuit breaker panel protects the complete air conditioning electrical system.
OVERHEAD VENT BLOWER.
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. The four position
blower switch on the instrument panel controls the three speed blower.
REMOVAL OF BLOWER ASSEMBLY.
1. Remove the access door from the aft wall of the baggage area.
2. With the master switch off, disconnect the plug assemblies at the blower assembly.
3. Remove the inlet and outlet hoses from the blower assembly by removing the clamps.
4. Remove the screws, washers and nuts that secure the blower assembly to the hanger braces.
5. Remove the screws and washers which secure the blower assembly to the retainer and hangers.
6. Remove the blower assembly from the aircraft.
DISASSEMBLY OF BLOWER ASSEMBLY.
1. Remove the hose duct from the forward edge of the blower assembly by removing the nuts, washers
and screws.
2. Remove the cover from the blower assembly by removing the nuts, washers and screws.
3. Remove the blower fan from the motor shaft by removing the set screw.
4. For removal of the motor, proceed as follows:
A. Separate the plate from the motor cover by carefully drilling out the connecting rivets.
B. Cut the motor wires at the edge of the receptacle and plug and remove the wire ends from the
blocks.
C. Remove the motor from the mounting plate by removing the nuts, washers and bolts.
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
1G20
21-50-46
Page 21-45
December 1, 1978