Specifications - Chevrolet 1988 Light Duty Truck Repair Manual

type hoses are used, loosen the hose connec­
tions at gage manifold to release the vapor
pressure from the compressor.
• Disconnect both gage adapters or hoses from
J 9625-A.
• Add 0.085 kg (3 oz.) new 525 viscosity refriger­
ant oil to the com pressor assembly. Rotate the
complete com pressor assem bly (not the shaft
or drive plate hub) slowly several turns to dis­
tribute oil to all cylinder and piston areas.
• Install the shaft nut (1) on the com pressor
shaft (20) if the pulley assem bly and clutch
plate and hub assem bly are not installed.
• Using a box-end wrench, or a socket and han­
dle, rotate the com pressor shaft (20) or clutch
plate on the shaft (20) several turns to lubri­
cate the pistons and cylinder walls.
• Connect the charging station high-pressure
line, or a h ig h -p re s s u re g a g e and g age
adapter to J 9625-A high-side connector.
• Attach an adapter or depressor-type hose to
the suction or low-pressure port of J 9625-A to
open the Schrader-type valve. Oil will drain out
of the com pressor suction port adapter if the
com pressor is positioned with the suction port
downward.
• Attach the com pressor to J 33026 fixture and
mount the com pressor in a vise so that the
com pressor will be in a horizontal position and
the shaft (20) can be turned with a wrench.
Type — Harrison H R -6 ......................................................................................................................................................6 C ylinder Axial
D is p la c e m e n t.............................................................................................................................................................................. 10.0 Cu. In.
R o ta tio n............................................................................................................................................................................................ Clockwise
Clutch Plate Air G a p .............................................................................................................................0.38-0.64 mm (0.015-0.025 inch)
Oil C a p a c ity ........................................................................................................................................................................0.227 Kg. (8 oz.)
Ohms (at 2 7 ° C - 8 0 ° F ) ................................................................................................................................................................... 3.56-3.89
Amps (at 2 7 ° C -8 0 ° F ).......................................................................................................................................................... 3.2 @ 12 Volts
Compressor Suction and Discharge C onnector Bolt
Through B o lts ....................................................................
Shaft N u t.............................................................................
Pressure Relief V alve...................................................................................................................................................
HR-6 AIR CONDITIONING COMPRESSOR 1B5-15

SPECIFICATIONS

HR-6 COMPRESSOR
CLUTCH COIL
TORQUE SPECIFICATIONS
• Rotate the com pressor shaft (20) or drive plate
hub six to eight com plete revolutions at a
speed of approxim ately one revolution per
second. A slower rotation can result in a lower
p u m p -u p p re ssu re and d is q u a lify a good
pum ping compressor.
• O bserve the reading on the high-pressure
gage at the com pletion of the tenth revolution
of the com pressor shaft (20). The pressure
re a d in g fo r a good p u m p in g c o m p re sso r
should be 690 kPa (100 psi) or above. A pres­
sure reading of less than 620 kPa (90 psi)
would indicate one or more suction and/or dis­
charge valves leaking, an internal leak, or an
inoperative valve. Disassemble the com pres­
sor and repair as necessary. Reassemble and
repeat the pum p-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 com pressor to place the suction and
discharge ports downward to allow the oil to
drain from the compressor.
• A llo w a 10-m inute d ra in p e rio d and then
c h a rg e th e c o m p re s s o r w ith th e p ro p e r
am ount of oil. Pour the new 525 viscosity re­
frigerant oil into the suction port.
• If further assem bly or processing is required,
install a shipping plate or test plate J 9625-A to
protect the com pressor from contam ination.
.24 N m (18 Ft. Lbs.)
. .9 N m (84 In. Lbs.)
.16 N m (12 Ft. Lbs.)
9
N m (84 In. Lbs.)