CHART 2106. COMPRESSOR OIL CHARGE (YORK)
Oil Charge Ounces 6 8 10
Dipstick Reading Inches 13/ 16” 1.00” 1-3/16”
2. Use the following instructions for checking Sankyo compressor oil level:
A. Run the compressor for 10 minutes with engine at 1900 RPM.
—WARNING—
If the air conditioner is to be operated during ground servicing,
the test area should be clean and free of any loose objects lying
on the ramp. Only the service valve located on the evaporator
assembly should be used for testing.
B. Discharge the system per Discharging; be careful not to lose any oil.
C. Remove the oil filler plug.
D. Position the rotor to top dead center (refer to Figure 21-12) by rotating the clutch front plate until
the casting mark is visible in the center of the hole.
E. Rotate the clutch front plate clockwise by approximately 110°. (Refer to Figure 21-13.)
F. Insert dipstick No. 32447 purchased from Sankyo. (See Compressor Service for Sankyo address.)
G. Remove the dipstick and count the number of increments of oil. The acceptable oil level in
increments is 7 to 10. This represents between 2.6 and 4.4 fluid ounces.
H. When oil is added, Piper refrigerant oil PMS-L2000 or equivalent 500 viscosity refrigerant oil
must be used.
I. When installing the oil filler plug, make sure the sealing O-ring is not twisted and that no dirt nor
particles are on the O-ring or seat. Torque the plug to 6-9 foot-pounds. Do not overtighten the plug
to stop a leak; remove the plug and install a new O-ring.
J. Evacuate and charge the system. (Refer to Evacuating the System and Charging the System.)
—CAUTION—
The oil plug should not be removed with pressure in the system.
REPLACEMENT OF YORK COMPRESSOR AND/OR ALTERNATOR DRIVE BELTS.
(Refer to Figure 21-15.) (PA-28RT-201)
1. Remove the old belts by removing the spinner, propeller, nose cowl, right front baffle, starter ring gear
assembly and drive belts.
2. Place the new belt or belts in their appropriate positions on the starter ring gear sheaves.
3. Reinstall the starter ring gear assembly, propeller and spinner.
21-50-20
Page 21-30
Revised: August 17, 1982
1G5
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
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