Specifications - GMC 1990 Light Truck Repair Manual

1B4-16 HR-6 AIR CONDITIONING COMPRESSOR
suction port adapter if the compressor is positioned
with the suction port downward.
• Attach the compressor to the J 33026 fixture and
mount the compressor in a vise so that the compres­
sor will be in a horizontal position and the shaft (20)
can be turned with a wrench.
• Rotate the compressor shaft (20) or drive plate hub
ten complete revolutions at a speed of approximately
one revolution per second. A slower rotation can
result in a lower pump-up pressure and disqualify a
good pumping compressor.
• Observe the reading on the high-pressure gage at the
completion of the tenth revolution of the compressor
shaft (20). 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
Type — Harrison HR-6................
Displacement..............................
Rotation........................................
Clutch Plate Air G a p ..................
Oil C apacity................................
Model Number (Gasoline Engine)
(Diesel Engine)..
Ohms (at 27°C-80°F)................................................................................................................................................... 3.56-3.89
Amps (at 27°C-80°F)........................................................................................................................................... 3.2 @ 12 Volts
Compressor Suction and Discharge Connector Bolt........................................ ........................................ 24 N m (18 Ft. Lbs.)
Through Bolts..................................................................................................... .......................................... 9 N m (84 In. Lbs.)
Shaft N u t........................................................................................................... ........................................ 16 N m (12 Ft. Lbs.)
Pressure Relief Valve......................................................................................... .......................................... 9 N m (84 In. Lbs.)

SPECIFICATIONS

HR-6 COMPRESSOR
CLUTCH COIL
TORQUE SPECIFICATIONS
indicate one or more suction and/or discharge valves
leaking, an internal leak, or an inoperative valve. Dis­
assemble the compressor and repair as necessary.
Reassemble and repeat the pump-up test.
• Following the pressure pump-up test, release the air
pressure from the high side and remove the gage
adapters and J 9625-A test plate.
• Tilt the compressor to place the suction and dis­
charge ports downward to allow the oil to drain from
the compressor.
• Allow a 10-minute drain period and then charge the
compressor with the proper amount of oil. Pour the
new 525 viscosity refrigerant oil into the suction port.
• If further assembly or processing is required, install a
shipping plate or test plate J 9625-A to protect the
compressor from contamination.
........................ .6 Cylinder Axial
................................ 10.0 Cu. In.
.................................. Clockwise
.0.38-0.64 mm (0.015-0.025 inch)
.......................... 0.227 Kg (8 oz.)
...................................... 1131684
...................................... 1131678