High-Side-High Pressure Cut Off Switch Replacement; Front Head And/Or Seal Replacement; Main Bearing Replacement - Chevrolet 1988 Light Duty Truck Repair Manual

0
Install or C o n n ect (F ig u re 1)
1
. Seal (23).
• Dip the seal in clean 525 viscosity refrigerant
oil before inserting it into the valve cavity.
2. Valve (24).
& T ig h ten
• Valve (24) to 17 N m (13 ft. lbs.).
HIGH-SIDE-HIGH PRESSURE
CUT OFF SWITCH
REPLACEMENT
B R em o ve or D isco n n ect (F ig u re 1)
Tools Required:
J 5403 Snap Ring Pliers
J 9553 O-Ring Remover
1. Protective cap (28).
2. Retainer ring (27) with J 5403.
3. Valve (26).
4. Seal (25) with J 9553-01.
Clean
• Remove any dirt from the valve cavity.
□ Install or C o n n e c t (F ig u re 1)
1. New seal (o-ring) (25) to the cavity.
• Dip th e new seal in cle a n 525 v is c o s ity
refrigerant oil.
2. Pressure relief valve (26).
3. Retainer ring (27) with J 5403-A.
4. Cap (28).
FRONT HEAD AND/OR
SEAL REPLACEMENT
4 - + R em ove or D is c o n n e c t (F ig u re 1)
1. Rotor (5) and hub (3) assembly.
2
. Shaft seal (12).
3. Front head bolts (14).
4. Front head (15).
Clean
Remove any dirt from the front head.
Inspect
• The front head for cracks or damage. Replace,
if necessary.
Install or C o n n ect (F ig u re 1)
1. New seal (17).
• Dip the seal into clean 525 viscosity refrigerant
oil before installing.
• Position the seal into the groove in the front
head.
2. Front head (15).
• Place the oil hole in the " U P" position when
assembled to the com pressor to correspond
with the " U P " position of the compressor.
R-4 AIR CONDITIONING COMPRESSOR 1B3-9
Figure 20 — Removing the Bearing from the
Bolts (14).
$
• Bolts (14) to 27 N m (20 ft. lbs.).
Rotor (5) and bearing (

MAIN BEARING REPLACEMENT

+ + R em ove or D isco n n ect (F ig u res 1 and 20)
Tools Required:
1. Rotor (5) and bearing (
2. Front head (15) and seal (17).
3. Bearing (16) from the front head (15) (figure 20).
• Place the front head on two blocks.
• Drive the bearing out of the front head with
Install or C o n n ec t (F ig u re s 1 and 21)
Tool Required:
1. Bearing (16) to the front head (15) (figure 21).
• Place the bearing with the neck down on a flat
• Drive the bearing into the front head with
2. Front head (15) and seal (17) to the compressor.
3. Rotor (5) and bearing (
Front Head
T ig h te n
6 ) assembly.
M easu re
• The gap between the clutch plate and
the clu tch rotor m ust be 0.5-1.0 mm
(0.020-0.040 inches).
J 24895 Bearing Installer
J 24896 Bearing Remover
6
) assembly.
J 24896.
J 24895 Bearing Installer
2 1
surface (figure ).
J 24896.
6
) assembly.