J 39500-B GM Air Conditioning Refrigerant Recovery, Recycling and Recharging System
Notice: R-12 refrigerant and R-134a refrigerant must never be mixed, even in the smallest of amounts, as they are incompatible with each other. If the refrigerants are mixed, compressor failure is likely to occur. Refer to the manufacturer instructions included with the service equipment before servicing.
All with one hook-up, the J 39500-B GM air conditioning refrigerant recovery, recycling and recharging system removes Refrigerant-134a from the vehicle air conditioning (A/C) system, recycles, and recharges the system. Single pass filtering during the recovery cycle, plus automatic multiple pass filtering during the evacuation cycle assures a constant supply of clean and dry refrigerant for A/C system charging. Refer to the manufacturer's instructions for further information.
Important: Use only the 23 kg (50 lb) unit refrigerant tank (J 39500-50) designed for the ACR4. The calibration of the unit overfill limitation mechanism is specific for use with this tank. The tank valving is specific for use with the unit.
This valve is in the receiver dehydrator tube, between the receiver and dehydrator and the condenser.
This valve is located between in the compressor and condenser hose, between the compressor and the expansion tube.
Important: If the A/C system has no refrigerant, do not continue with the recovery operation. A recovery operation without refrigerant draws air into the recovery tank.
No pressure indicates that the system has no refrigerant in need of recovery.
Return the bottle in place on the unit.
Important: The blower motor in the HIGH setting increases the rate at which the J 39500-B recovers refrigerant. Maintain the A/C blower motor on the HIGH setting during the recovery operation.
The unit clears itself of refrigerant.
The display reads CL-L.
The control panel shows that the unit is in the RECOVER mode of the AUTOMATIC cycle.
Important:
• The recovery might remove a small amount of the A/C system lubricating
oil polyakylene glycol (PAG) with the refrigerant. Often, the recovery does not
remove any oil. The amount of oil removed varies greatly. The amount of oil removed
depends on various conditions of the vehicle. The J 39500-B
separates the oil from the refrigerant. • The flashing of the OIL/OZ (OIL/GMS) indicator is a reminder:
drain the recovered oil at this time. Replace the same amount of oil into the A/C
system when you recharge the system with refrigerant.
The display then alternately displays the weight of the refrigerant recovered and the OIL/OZ (OIL/GMS) indicator.
Never reuse this oil.
• | If the A/C system maintains a vacuum, the recovery is complete. |
• | A rise in the LOW-SIDE GAGE pressure above 0 indicates the presence of more refrigerant. |
Important:
• If the display flashes the FULL indicator during the recovery
process, the unit ceases operation. The unit tank is full. • Prior to continuation of the recovery process, install an empty unit
tank (J 39500-50) in order to accommodate additional refrigerant. Do not
use any other kind of tank. • If necessary, lower the amount of refrigerant in the unit tank by charging
other vehicles.
If oil was removed from the A/C system during the recovery process or due to component replacement, the oil must be replenished. Oil can be injected into a charged system using J 45037 . For the proper quantities of oil to add to the A/C refrigerant system, refer to Refrigerant System Capacities .