Piper SEMINOLE PA-44-180, Maintenance Manual

Page: 179 / 881

SYSTEM COMPONENTS.
COMPRESSOR SERVICE.
It is not advisable to service the compressor in the field. It should be done by a qualified shop which has the
special equipment and trained personnel required to properly service the unit.
Maintenance to the Sankyo compressor is limited to replacement of worn drive belt. Contact Sankyo
International 3529 Miller Park Drive, P.O. Box2903, Garland, Texas 75042 for special tool sand instructions for
detailed compressor maintenance.
— Note —
An important factor in air conditioning servicing is cleanliness, care should be
exercised to prevent dirt or foreign material from entering the system. All hose and
tubing ends should be capped immediately. Any lubrication required in the assembly
of the components should be refrigerant oil of the type used in the compressor.
REMOVAL OF COMPRESSOR.
— WARNING —
BEFORE REMOVING THE SUCTION AND DISCHARGE LINES THE AIR
CONDITIONING SYSTEM MUST BE COMPLETELY DISCHARGED
1. Ascertain that air conditioning circuit protector is in the off position.
2. Remove engine cowling.
3. Disconnect the electrical leads to the magnetic clutch on the compressor.
4. Depressurize the air conditioning system.
5. Remove the suction and discharge line from the service valves on the compressor.
— Note —
All open lines should be capped immediately to prevent dirt and moisture from
entering the system.
6. Loosen the four bolts securing the compressor in the mounting brackets. Rotate the compressor in the
bracket slots to disconnect drive belt.
7. Support compressor and remove the attach bolts.
INSTALLATION OF COMPRESSOR.
1. Place the compressor in the mounting brackets and install attachment bolts. Do not torque attachment
bolts at this time.
2. Install compressor drive belt. Rotate compressor drive belt. Rotate compressor in mounting bracket slots
to obtain belt tension of 45 to 50 pounds. Torque the four attachment bolts 225 to 300 inch-pounds. If
installing a new V-belt, recheck belt tension after 1 to 1.5 hrs. of initial operation.
3. Check the oil level in the compressor.
4. Connect the discharge and suction lines to their respective fittings.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
2 1 - 5 3 - 0 3
Page 21-68
Revised: May 15, 1989
1H11
PIPER AIRCRAFT