Table of Contents
Advertisement
CUSTOM AIR CONDITIONING
1 B-6 1
FRONT
SURFACE
Fig.
16-1 1 1 1977 A-4 Clutch Coil Asm.
0
HOUSING
A
--
-
Before fully seating the assembly on the front head, be
sure the clutch coil terminals are in the proper location in
relation to the compressor and that the three protrusions on
the rear of the clutch coil align with the locator holes in the
front head.
3. Install the rotor and bearing assembly retaining ring
and reassemble the clutch plate and hub assembly. Check the
clutch plate to clutch rotor air gap (.020
-
.040
inches).
Rotate the pulley rim and rotor to be sure the pulley rim
is rotating "in-line" and adjust or replace as required.
4. Tighten the pulley rim mounting screws to 100 inch-
pounds torque and lock the screw heads in place by bending
lock washers (Fig. 1 B- 1 10).
I
I
Fig.
16-1 12 Assembling 1977 R-4 Clutch Coil, Pulley Rim
and Rotor
&
Bearing
MAJOR R - 4 COMPRESSOR REPAIR PROCEDURES
Service repair procedures to the Compressor
Shaft
Seal
and
Pressure Relief
Valve
or
disassembly
of
the
Internal
Compressor
Mechanism are considered "MAJOR" SINCE THE
REFRIGERATION
SYSTEM
MUST
BE
COMPLETELY PURGED OR REFRIGERANT before
proceeding
and/or
because
major
internal
operating
and
sealing
components of
the
compressor are being disassembled and serviced.
A clean workbench, preferably covered with a sheet of
clean paper, orderliness in the work area and a place for all
parts being removed and replaced is of great importance, as
is the use of the proper, clean service tools. Any attempt to
use make-shift or inadequate equipment may result in damage
and/or improper compressor operation.
These procedures are based on the use of the proper
service tools and the condition that an adequate stock of
service parts is available.
All parts required for servicing are protected by a
preservation process and packaged in a manner which will
eliminate the necessity of cleaning, washing or flushing of the
parts. The parts can be used in the mechanism assembly just
as they are removed from the service package.
WHEN
REPLACING
THE
SHAFT
SEAL
ASSEMBLY (see Fig. 1B-44), OR PRESSURE RELIEF
VALVE, even if the compressor remains on the vehicle
during the operation, IT WILL BE NECESSARY TO
PURGE THE SYSTEM O F REFRIGERANT as outlined
earlier in the Service Manual (see "Discharging, Evacuating
and Charging Procedures for C.C.O.T. A/C Systems"). THE
SAME HOLDS TRUE FOR ANY DISASSEMBLY O F
THE INTERNAL R-4 COMPRESSOR MECHANISM.
R-4 COMPRESSOR SHAFT SEAL
SEAL LEAK DETECTION
A SHAFT SEAL SHOULD NOT BE CHANGED
BECAUSE OF AN OIL-LINE ON THE HOOD
INSULATOR. The seal is designed to seep some oil
for lubrication purposes. Only change a shaft seal
when a leak is detected by evidence of oil sprayed
in large amounts and then only after actual
refrigerant leakage is determined by test with
Electronic Leak Detector, J 23400.
Advertisement
Table of Contents
