Leak Testing - Chevrolet 1988 Light Duty Truck Repair Manual

1B5-14 HR-6 AIR CONDITIONING COMPRESSOR
• Line up m ark on front head (11) with the
alignm ent marks on the com pressor cylinders
and assemble head over J 33016 guide pins
(figure 27).
Tools Required:
J 9625-A Pressure Test Plate
J 23500-01 Portable Charging Station
J 33026 Com pressor Holding Fixture
• Be sure the com pressor has no oil internally.
1. Install J 9625-A on the rear head of com pressor (fig­
ure 3).
2. Install the center hose of the manifold gage set on
J 23500-01 to a refrigerant drum standing in an up­
right position and open the valve on the drum.
3. Install the charging station high and low pressure
lines to corresponding fittings on J 9625-A using
gage adapters or hoses equipped with valve depre­
ssors. Suction port (low side) of the com pressor has
large internal opening. Discharge port (high side)
has a sm aller internal opening into the compressor.
• Open the low pressure control, high pressure con­
trol and the refrigerant control on the charging sta­
tion to allow re frig e ra n t vapor to flow into the
compressor.
• Front head (11) is now a ssem bled in the
• Using both hands, press down on front head
12. Through bolts (7) with new gaskets.
• Thread four of the through bolts (7) into the
• Mount the com pressor on J 33026 (figure 39).
$
• Six through bolts (7) alternately to 9 N m (84
13. Shaft seal parts (8).
9
• Add new 525 viscosity refrigerant oil.
• Refer to vehicle service manual for fill quantity.
• Place shaft nut (1) on the shaft (20) and rotate
• Leak test the compressor.
• Refer to " Leak Testing."
14. Clutch coil assem bly (6).
15. Pulley (5).
16. Clutch plate and hub assem bly (2).

LEAK TESTING

Im p o rtan t
" s ta n d a rd " p o s itio n and m ay d iffe r 120
degrees either direction. Assemble front head
(11) a c co rd in g to lo c a tio n m arked before
removal.
(11) for installation over the seal (15) at the
front of the cylinder (16).
rear head (28) before rem oving J 33016 guide
pins. Install two rem aining through bolts (7)
finger tight.
T ig h ten
in. lbs.).
Im p o rta n t
the com pressor shaft (20) several tim es and
remove nut (1).
Im p o rta n t
Check for leaks at pressure relief valve (32),
com pressor front and rear head seals (15) (24),
center cylinder seal (22), through bolt head
gaskets and com pressor shaft seal.
After leak check, shut off the low pressure
co n trol and the high pressu re co ntrol on
charging station.
If an external leak is present, perform the nec­
essary correction and recheck to assure the
correction.
If an external leak is present, perform the nec­
essary correction and recheck to assure the
correction.
Loosen the m anifold gage hose connections to
the gage adapters connected to the low and
high sides and allow the vapor pressure to re­
lease from the compressor. If valve depressor