COMPRESSOR INSTALLATION
l. Place compressor to mounting brackets. Install six bolts and progressively tighten to a torque of 14 to
17 foot-pounds. Safety all bolts with 0.032 safety wire.
2. Check oil level in compressor in accordance with instructions given in Checking Compressor Oil.
3. Place drive belt over clutch pulley and adjust alignment of pulleys and belt in accordance with
instructions in Replacement of Compressor and Alternator Drive Belts.
—CAUTION—
Do not force belt into pulley sheave. If necessary, remove idler
assembly.
4. Connect discharge and suction lines to their respective service valve fittings.
5. Evacuate and charge system per Evacuating the System and Charging the System.
—WARNING—
If air conditioner is to be operated on ground for servicing, test
area must be clean and free of any loose objects lying on ramp.
Only service valves located on evaporator assembly may be used
for testing.
CHECKING COMPRESSOR OIL
Check oil level any time system is discharged. Proceed as follows:
I. Discharge system. (Refer to Discharging,)
2. Fabricate an oil dipstick. (Refer to figure 21-10.)
3. Remove oil fill plug. (A 0.3~5 inch plug on top side of compressor crankcase.)
4. Before inserting dipstick, rotate crankshaft to locate Wo o d r u ff key in up position. (The compressor
clutch front face is marked with a stamped K indicating key position.) Measure oil level from lowest
point in crankcase. Use long end of dipstick. (See figure 21-10,)
5. With compressor in installed position, use chart 2106 to determine amount of oil in crankcase.
6. Never operate compressor with less than 6 ounces of oil. When oil is added, level should not be more
than 10 ounces. Piper refrigerant oil PMS-L2000 or equivalent 500 viscosity refrigerant oil must be
used.
7. Evacuate and charge system. (Per Evacuating the System and Charging the System,)
—CAUTION—
The 10 ounce oil level is required in compressors installed on
new systems. Some oil is distributed in system during operation.
Replacement compressors must be charged with 10 ounces of oil.
21 - 53 - 00
Page - 21 - 26
Reissued: August 1, 1986
1G16
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
To Next Page
Loading...
