- Install the J 39893
on the rear head of the compressor.
- Using the J 39500-B
,
attach the center hose of the manifold gauge set on the charging station to a refrigerant
drum standing in an upright position.
- Connect the charging station high and low pressure lines to the corresponding
fittings on the J 39893
.
The suction port (1) (low-side) of the compressor has a large internal
opening. The discharge port (high-side) has a smaller internal opening into
the compressor. The discharge port (2) (high-side) also has a deeper
recess.
- Open the following controls on the charging station in order to allow
refrigerant vapor to flow into the compressor:
• | The low pressure control |
• | The high pressure control |
• | The refrigerant control |
- Use the J 39400
in
order to inspect for leaks at the following locations:
• | The pressure relief valve |
• | The rear head switch location |
• | The compressor front head seal |
• | The compressor rear head seal |
• | The center cylinder seal |
• | The through bolt head gaskets |
• | The compressor shaft seal |
- Turn OFF the low-pressure control and the high-pressure control on the
charging station.
- Perform the following steps if an external leak exists:
7.1. | Perform the necessary corrective measures. |
7.2. | Inspect the components for leaks again in order to verify that the leak
is corrected. |
- Recover the refrigerant.
- Disconnect both hoses from the J 39893
.
- Add 90 ml (3 fl oz) of new PAG lubricant to the
compressor assembly.
- Slowly rotate the complete compressor assembly (excluding the crankshaft
and the drive plate hub) several turns in order to distribute oil to all
of the cylinder and the piston areas.
- Install a M9 x 1.25 threaded nut on the compressor crankshaft
if the drive plate and clutch assembly are not installed.
- Use a box-end wrench or socket and handle in order to rotate the compressor
crankshaft or clutch drive plate on the crankshaft several turns.
Performing
the above action will ensure piston assembly to cylinder wall lubrication.
- Using the J 39500-B
,
connect the J 39893
to the test
plate high-side connector.
- Using the J 39500-B
,
connect the charging station low-pressure line to the low-pressure port of the J 39893
.
Oil will drain
out of the compressor suction port (1) if the compressor is positioned with
the suction port downward.
- Attach the compressor to the J 34992
.
- Mount the compressor in a vise in order to place the compressor in a
horizontal position.
- Use a wrench in order to rotate the compressor crankshaft or the drive
plate hub ten complete revolutions at the 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. Low pump-up pressure may disqualify
a good pumping compressor.
- Observe the reading on the high-pressure gauge at the completion of the
tenth revolution of the compressor.
The pressure reading for a good pumping
compressor should measure 690 kPa (100 psi) or above. A pressure reading
less than 620 kPa (90 psi) indicates one or more of the suction
and/or discharge valves have an internal leak or an inoperative valve.
Perform the following procedure if one of the valves are leaking or inoperative:
19.1. | Recover the refrigerant. |
19.2. | Disassemble the compressor. |
19.3. | Inspect the compressor for the cause of the leak. |
19.4. | Repair the compressor as necessary. |
19.5. | Reassemble the compressor. |
19.6. | Repeat the pump-up test. |
19.7. | Test for external leaks |
- Recover the refrigerant from the high-side.
- Remove the J 39893
.
- Tilt the compressor with the compressor suction port (1) and the
discharge port (2) positioned downward.
- Drain the PAG lubricant from the compressor.
Allow the compressor
to drain for 10 minutes.
- Refill the compressor with the proper amount of PAG lubricant. Refer
to
Compressor Oil Level Check
.
Pour the PAG lubricant into
the suction port (1).
- If further assembly or processing is necessary, install a shipping plate
or the J 39893
. The
shipping plate or the J 39893
prevents the following materials from entering the compressor until the
compressor is installed: