GMC 1990 Light Truck Repair Manual page 21

SUBJECT
A-6 Air Conditioning Compressor...................................................................................................................... 1B1-1
V-5 Air Conditioning Compessor.........................................................................................................................1B2-1
R-4 Air Conditioning Compressor...................................................................................................................... 1B3-1
HR-6 Air Conditioning Compressor.................................................................................................................... 1B4-1
SD-709 Air Conditioning compressor................................................................................................................ 1B5-1
A-6 AIR CONDITIONING COMPRESSOR
SUBJECT
Description................................................................................................................................................................... 1B1- t
Minor Repair to the Compressor........................................................................................................................... 1B1- 3
Clutch Plate and Hub Assembly Replacement......................................................... ..................................... 1B1- 3
Pulley and Bearing Assembly Replacement...................................................................................................1B1- 4
Clutch Coil and Housing Assembly Replacement........................................................................................ 1B1- 6
Major Repair to the Compressor........................................................................................................................... 1B1-
Shaft Seal Replacement.......................................................................................................................................1B1-
Pressure Relief \falve Replacement..................................................................................................................1B1-
Compressor Disassembly........................................................................................................................................ 1B1-
Gaging Operation...................................................................................................................................................1B1-12
Gaging Procedure..................................................................................................................................................1B1-14
Piston Ring Replacement....................................................................................................................................1B1-16
Compressor Assembly............................................................................................................................................. 1B1 -1
Leak T estin g ................................................................................................................................................................1B1-21
Specifications...............................................................................................................................................................1B1 -22
Special Tools.............................................................................................................................................................. 1B1-23
DESCRIPTION
When servicing the Harrison A-6 compressor, pre-
vent dirt or foreign material from getting on or into the
compressor parts and system during disassembly or
reassembly
Keep tools and work area clean. Clean the compres-
sor exterior before disassembly. Clean parts with
trichloroethane, naptha or Stoddard solvent, kerosene
or equivalent. Dry with air.
Use a non-lint producing type cloth to clean each
part.
Although certain service operations can be per-
formed without removing the compressor from the vehi-
cle, the operations described here are based on bench
repair with the compressor removed from the vehicle.
A-6 AIR CONDITIONING COMPRESSOR
SECTION 1
AIR CONDITIONING
CONTENTS
SECTION 1B1
CONTENTS
They have been prepared in sequence in order of
accessibility of the components (figure 1).
For compressor removal and installation, refer to the
^o not kink or place excessive tension on lines or
A*ter removm9 the compressor from the vehicle,
drain anc* measure the refrigerant oil. Add new 525
vlscos,lty refrigerant oil after repair. Refer to Spec.fica-
An identification label attached to the compressor
provides the name of the manufacturer, model number
and build code. If the label is removed or becomes
dislodged during service operation, reattach it using an
adhesive sealant such as Loctite 312 or equivalent.
1B1-1
PAGE
PAGE
proper truck service manual,
hoses.
tl0ns-
IDENTIFICATION
7
7
9
9
7