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CONTROL SWITCHES
Figure 20
Remove or Disconnect
1. j Recover the refrigerant.
2.
Disconnect the electrical connector from the, switch in
the rear head of compressor.
3.
.Remove the switch retaining ring using J 5403 internal
snap ring pliers.
4.
Remove the switch from the compressor.
5.
Remove old O-ring seal from the switch cavity using
J 9553-01 O-ring removal tool.
If existing control switch is reinstalled in the compressor,
a new O-ring seal must be used and preferably a new retainer
ring should also be used. A new switch kit has the O-ring and
retainer ring included.
|» » | Install or Connect
1.
Check switch cavity and O-ring groove in the rear head
for dirt or foreign material and clean asnecessary. Install
a new O-ring coated with clean refrigerant oiL into
groove in switch cavity.
2.
Lubricate the control switch housing with clean
refrigerant oil and carefully insert switch into switch
cavity until switch bottoms in cavity.
3.
Using J 9533-1 snap ring pliers install switch retaining
ring with high point of curved sides adjacent to switch
housing. Be sure retaining ring is properly seated in
switch cavity retaining groove. Leak test according to
bench test procedure.
COMPRESSOR LEAK TESTING
(EXTERNAL AND INTERNAL)
Bench-Check Procedure
1.
Install test plate J 9625-A on rear head of compressor.
2.
Using J 38100-C Refrigerant Recovery System, attach
center hose of manifold gage set on charging station to a
refrigerant drum standing in an upright drum.
3.
Connect charging station high and low, pressure lines to
corresponding fittings on test plate J 9625-A,, using J
5420 gage adapters or hoses equipped with valve
depressors. Suction port (low-side) of compressor has
large internal opening. Discharge port (high-side) has
smaller internal opening into compressor.
4.
Open low pressure control, high pressure control and
refrigerant control on -charging station to allow
refrigerant vapor to flow into compressor.
5.
Using a leak detector, check for leaks at pressure relief
valve, rear head switch location, compressor front and
rear head seals, center cylinder seal, through bolt head
gaskets and compressor shaft seal. After checking, shut
off low pressure control and high-pressure control on
charging station.
HR6-HE AIR CONDITIONING COMPRESSOR 1D2-11
6.
If an external leak is present, perform the necessary
corrective measures and recheck for leaks to make
certain the leak has been Corrected.
7.
Recover the refrigerant.
8.
Disconnect both gage adapters J 5420 or hoses from the
test plate J 9625-A.
9.
Add 90 ml (3 oz.) new 525 viscosity refrigerant oil to the
compressor assembly. Rotate the complete compressor
assembly (not the crankshaft or drive plate hub) slowly
several turns to distribute oil to all cylinder and piston
areas.
10.
Install a. M9 x 1.25 threaded nut on the compressor
crankshaft if the drive plate and clutch assembly are not
installed.
11.
Using a box-end wrench or socket and handle, rotate the
compressor crankshaft or clutch drive plate on the
crankshaft several turns to insure piston assembly to
cylinder wall lubrication.
12.
Using J 38100-C Refrigerant Recovery System, connect
the
high-pressure gage and gage adapter J-5420 to the test
plate J 9625-A high-side connector.
13.
Attach an adapter J 5420 or depressor-type hose to the
suction or low pressure port of the test plate J 9625-A to
open the Schrader-type valve. Oil will drain out of the
compressor suction port adapter if the compressor is
positioned with the suction port downward.
14.
Attach the compressor to the J 33026 holding fixture and
mount the compressor in a vise so that the compressor
will be in a horizontal position and the' shaft can be
turned with a wrench.
15.
Using a wrench, rotate the compressor crankshaft or
drive plate hub ten complete revolutions at a speed of
approximately one-revolution per second. Turning the
compressor at less than one-revolution per second can
result in a lower pump-up pressure and disqualify a good
pumping compressor.
16.
Observe the reading on high-pressure gage at the
completion of the tenth revolution of the compressor.
The pressure reading for a good pumping compressor
should be 690 kPa (100 psi) or above. A pressure reading
of less than 620 kPa (90 psi) w6uld;ihdicate.one or more
suction and/or discharge valves leaking an internal leak,
,
or an inoperative valve, and the refrigerant must be
recovered and the compressor disassembled , and
checked for cause of leak. Repair as needed, reassemble
and repeat the pump.-up test. Externally leak test.
17.
When the pressure pump-up test is completed, recover
the refrigerant from the high-side and remove the gage
adapters J 5420 and test plate J 9625-A.
18.
Tilt the compressor so that the compressor suction and
discharge ports are down. Drain the" oil from the
compressor.
19.
Allow the compressor to drain for 10 minutes, then refill
with the proper amount of oil. The oil may be poured into
the suction port. If further assembly* or processing is
required,
J 9625-A should be installed to keep out air, dirt and
moisture until the compressor is installed.
v
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-
..
charging
station
high-pressure
a
shipping
plate
v
line
or
a
or
test
plate
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