Piper Arrow IV Turbo Maintenance Manual page 147

F. Loosen the bolt securing the compressor idler pulley to release the belt tension and remove belt
from compressor pulley. (Do not force belt over the pulleys.)
G. Support the compressor and remove the six bolts securing the compressor to the engine mounting
brackets.
2. The removal instructions for the Sankyo compressor are as follows:
A. Ascertain that air conditioning circuit protector is in the off position.
B. Remove engine cowling.
C. Disconnect the electrical leads to the magnetic clutch on the compressor.
D. Depressurize the air conditioning system.
E. Remove the suction and discharge line from the service valves on the compressor.
All open lines should be capped immediately to prevent dirt and
moisture from entering the system.
F. Loosen the four bolts securing the compressor in the mounting brackets. Rotate the compressor in
the bracket slots to disconnect drive belt.
G. Support compressor and remove the attachment bolts.
COMPRESSOR INSTALLATION.
1. The installation instructions for the York compressor are as follows:
A. Place the compressor to the mounting brackets. Install the six bolts and progressively torque to 14-
17 foot-pounds. (Safety all bolts with .032 safety wire.)
B. Check the oil level in the compressor in accordance with instructions given in Checking
Compressor Oil.
C. Place drive belt over clutch pulley and adjust the alignment of the pulleys and belt in accordance
with instructions given in Replacement of Compressor and Alternator Drive Belts.
Do not force the belt into the pulley sheave. If necessary, remove
the idler assembly.
D. Connect the discharge and suction lines to their respective service valve fittings.
E. Evacuate and charge the system per Evacuating the System and Charging the System.
If the air conditioner is to be operated on the ground for
servicing, the test area should be clean and free of any loose
objects lying on the ramp. Only the service valves located on the
evaporator assembly should be used for testing.
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
—NOTE—
—CAUTION—
—WARNING—
1G3
21-50-18
Page 21-28
December 1, 1978