Minor Rerair To The Compressor; Clutch Plate And Hub Assembly Replacement; Clutch Rotor And Bearing Assembly Replacement - Chevrolet 1991 Light Duty Truck Repair Manual

1B1-2 Ar6 AIR CONDITIONING COMPRESSOR
They have been prepared in sequence in order of
accessibility of the components (figure 1).
For compressor removal and installation, refer to the
proper truck service manual.
Do not kink or place excessive tension on lines or
hoses.
After removing the compressor from the vehicle,
drain and measure the refrigerant oil. Add new 525

MINOR RERAIR TO THE COMPRESSOR

CLUTCH PLATE AND HUB
ASSEMBLY REPLACEMENT
Remove or Disconnect (Figures 1, 2 and 3)
B
Tools Required:
J 9396 Compressor Holding Fixture
J 9399-A Compressor Shaft Nut Socket
J 9401-B Hub Drive Plate Remover
J 25030-A Clutch Hub Holding Tool
• Clamp J 9396 in a vise.
• Compressor to J 9396. Secure with thumb screws
(figure 2).
1. Shaft nut (1) with J 9399-A.
• Hold the clutch plate and hub assembly (2)
with J 25030-A (figure 2).
2 Clutch plate and hub assembly (2).
• Thread J 9401-B into the clutch plate and hub
(2) (figure 3).
• Hold the body of J 9401-B with a wrench and
tighten the center screw into the remover body.
3. Shaft key (36).
• Retain the shaft key (36) if usable.
I n s p e c t ( F ig u r e s 1 , 4 a n d 5 )
• All parts and replace as necessary.
|-»<-| I n s t a ll o r C o n n e c t ( F i g u r e s 1 , 4 a n d 5 )
Tools Required:
J 9399-A Compressor Shaft Nut Socket
J 9401-A Hub and Drive Plate Assembly
Installer
J 25030-A Clutch Hub Holding Tool
1. Shaft key (36).
• Allow the shaft key (36) to extend 4.5 mm
(3/16-inch) out of the bottom of the hub keyway
(figure 4).
• The shaft key (36) is curved to give an interfer­
ence fit in the groove.
| ] Important
• Do not drive or pound on the clutch hub or the
shaft (39). Internal damage to the compressor
may result.
2. Clutch plate and hub assembly (2) (figure 4).
• Install the clutch plate and hub assembly (2)
over the compressor shaft lining up the key slot
viscosity refrigerant oil after repair. Refer to "Specifica­
tions."
IDENTIFICATION
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.
on the hub with the keyway slot in the shaft.
• Install J 9401-A on the threaded end of the
shaft (figure 5).
• Back off J 9401-A body to allow the center
screw to be threaded against the end of the
compressor shaft (39).
• Hold the center screw with a wrench and tight­
en the hex portion of J 9401-A body while
pressing the hub onto the shaft (39). After tight­
ening the body several turns, remove J 9401-A
and check that the shaft key (36) is properly in
place in the keyway.
• Air gap between contact surfaces of the clutch
plate and hub assembly (2) and the pulley (6)
should be 0.56-1.34 mm (0.022-0.057-inch).
• Remove J 9401-A.
Inspect
• Position of the shaft (39) (even with or slightly
above the clutch hub).
3. Shaft nut (1).
• Use J 25030-A to hold the clutch plate and hub
assembly (2).
• Shaft nut (1) to 27 N.m (20 ft.lbs.) with
J 9399-A.
• Hand spin the pulley (6) to check for free rota­
tion.
CLUTCH ROTOR AND BEARING
ASSEMBLY REPLACEMENT
Remove or Disconnect (Figures 1, 6 through
□ s
Tools Required:
J 6435 External Snap Ring Pliers
J 8092 Driver Handle
J 8433 Heavy Duty Pulley Puller
J 9395 Pulley Puller Adapter
J 9398-A Pulley Bearing Remover
J 9481-A Pulley Bearing and Pulley Installer
24092 Pulley Hub Adapter Set
J