Specifications - Chevrolet 1988 Light Duty Truck Repair Manual

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 gag e and gage
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.
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
pum p-up p re ssu re and d is q u a lify a good
pumping compressor.
Type — Harrison DA-6 com pressor
D is p la c e m e n t........................................
R otation............................................................................................................................................................................................ 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
C om pressor Suction and Discharge Connector B o lt........................................................................................ 24 N m (18 Ft. Lbs.)
Through B o lts .................................................................................................................................................................9 N-m (84 In. Lbs.)
Shaft N u t....................................................................................................................................................................... 16 N m (12 Ft. Lbs.)
Pressure Relief V alve................................................................................................................................................... 9 N m (84 In. Lbs.)
DA-6 AIR CONDITIONING COMPRESSOR 1B2-15

SPECIFICATIONS

DA-6 COMPRESSOR
CLUTCH COIL
TORQUE SPECIFICATIONS
Observe 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 for a good p u m p in g co 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. Reassem ble 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 com pressor to place the suction and
discharge ports downward to allow the oil to
drain from the compressor.
A llow a 10-m inute drain 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.
.6 C ylinder Axial
___ 10.0 Cu. In.