Isuzu Trooper 1999 Workshop Manual page 106

1A–78 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
14. Attach the compressor to the J-34992 holding fixture
and mount the compressor in a vise so that the
compressor will be in a horizontal position and the
shaft can be turned with a wrench.
15. Using a wrench, rotate the compressor crankshaft or
drive plate hub ten complete revolutions at a speed of
approximately one-revolution per second turning the
compressor at less than one-revolution per second
can result in a lower pump-up pressure and disqualify
a good pumping compressor.
16. Observe the reading on high-pressure gauge at the
completion of the tenth revolution of the compressor.
The pressure reading for a good pumping
compressor should be 690 kPa (100 psi) or above. A
pressure reading of less than 620 kPa (90 psi) would
indicate one or more suction and/or discharge valves
leaking an internal leak, or an inoperative valve, and
the refrigerant must be recovered and the
compressor disassembled and checked for cause of
leak. Repair as needed, reassemble and repeat the
pump-up test. Externally leak test.
17. When the pressure pump-up test is completed,
recover the refrigerant from the high-side and remove
the test plate J-39893.
18. Tilt the compressor so that the compressor suction
and discharge ports are down.
lubricant from the compressor.
19. Allow the compressor to drain for 10 minutes, then
refill with the proper amount of PAG lubricant, per oil
balance procedure described previously. The PAG
lubricant may be poured into the suction port. If
further assembly or processing is required, a shipping
plate or test plate J-39893 should be installed to keep
out air, dirt and moisture until the compressor is
installed.
Drain the PAG