Piper SEMINOLE PA-44-180, Maintenance Manual

Page: 181 / 881

5. Evacuate and charge the system.
— WARNING —
IF THE AIR CONDITIONER IS TO BE OPERATED ON THE GROUND FOR
S E RVICING, THE TEST AREA SHOULD BE CLEAN AND FREE OF ANY
LOOSE OBJECTS LYING ON THE RAMP. ONLY THE SERVICE VA LV E S
L O C ATED ON THE EVA P O R ATOR ASSEMBLY SHOULD BE USED FOR
TESTING.
COMPRESSOR OIL LEVEL CHECK.
— Note —
Compressor oil level should be checked any time the system is discharged
1. Run the compressor for 10 minutes with engine at 1900 RPM.
— WARNING —
IF THE AIR CONDITIONER IS TO BE OPERATED DURING GROUND
S E RVICING, THE TEST AREA SHOULD BE CLEAN AND FREE OF ANY
LOOSE OBJECTS LYING ON THE RAMP. ONLY THE SERVICE VA LV E
L O C ATED ON THE EVA P O R ATOR ASSEMBLY SHOULD BE USED FOR
TESTING.
2. Discharge the system being careful not to lose any oil.
3. Remove the oil fill plug.
4. Position the rotor to top dead center (Refer to Figure 21-31 by rotating the clutch front plate until the
casting mark is visible in the center of the hole.
5. Rotate the clutch front plate clockwise by approximately 110°. (Refer to Figure 21-32.)
6. Insert dipstick No. 32447 purchased from Sankyo.
7. 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.
8. When oil is added Piper refrigerant oil PMS-L2000 or equivalent 500 viscosity refrigerant oil must be
used.
9. When installing the oil filter 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.
10. Evacuate and charge the system.
— CAUTION —
THE OIL PLUG SHOULD NOT BE REMOVED WITH PRESSURE IN THE
SYSTEM.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
2 1 - 5 3 - 0 4
Page 21-70
Revised: May 15, 1989
1H13
PIPER AIRCRAFT