VALVE GP-CONTROL 1965865 - Caterpillar

Illustration 1 g01257459
Top View of Receiver-Dryer (1) Inlet (2) Quick Disconnect Fittings (3) Moisture Indicator (4) Outlet
If the receiver-dryer does not have air conditioner quick disconnects, the system must be recovered, evacuated, and recharged after the receiver-dryer has been replaced.
The refrigerant that is in the system must be recovered if the receiver-dryer does not have air conditioner quick disconnects (2) . Refer to the Testing and Adjusting, "Refrigerant Recovery" section before you remove the receiver-dryer. If the receiver-dryer has air conditioner quick disconnects (2) , use the procedure that follows.Refer to Safety Requirements before service is performed on the air conditioning system.
Stop the engine for 5 minutes to allow the air conditioning system to equalize the pressure.
Disconnect the inlet hose (1) from the old receiver-dryer at the air conditioner quick disconnects.
Connect the hose that was disconnected in Step 2 to the inlet on the new receiver-dryer.
Disconnect the electrical connections on the old receiver-dryer. Connect the electrical connections to the new receiver-dryer.Note: If the receiver-dryer has quick disconnects, do not add additional oil or refrigerant to the system.
Start the engine. Operate the air conditioning system for 1 minute.
With the air conditioning system in operation, disconnect the outlet hose (4) from the old receiver-dryer. Disconnect the old receiver-dryer at the air conditioner quick disconnects.
Stop the engine for 5 minutes to allow the air conditioning system to equalize pressure.
Connect the outlet hose (4) that was disconnected in step 6 to the new receiver-dryer.Note: The receiver-dryer must be replaced annually. The receiver-dryer must also be replaced whenever the system is opened. The receiver-dryer should be replaced if moisture indicator (3) is filled with moisture. Moisture indicator (3) will display a pink color or white color if the receiver-dryer is full of moisture.