C 3500 HD Truck 2WD V8-8.1L VIN G (2002)
High Pressure Sensor / Switch: Service and Repair
AIR CONDITIONING (A/C) HIGH PRESSURE SWITCH REPLACEMENT
REMOVAL PROCEDURE
TOOLS REQUIRED
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J 5403 Snap Ring Pliers
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J 9553-01 O-Ring Remover
1. Recover the refrigerant the system. Refer to Refrigerant Recovery and Recharging in Heating, Ventilation and Air Conditioning.
2. Clean the A/C high pressure switch area before removing the snap ring.
3. Disconnect the electrical connector from the A/C high pressure switch (2) from compressor.
4. Remove the A/C high pressure switch snap ring using the J 5403.
5. Remove the A/C compressor high pressure cut-off switch (2) from the compressor.
6. Remove the old O-ring seal from the A/C high pressure switch cavity using the J 9553-01.
7. Inspect the A/C high pressure switch O-ring groove in the rear head for dirt or foreign material. Clean the components as necessary.
INSTALLATION PROCEDURE
IMPORTANT: If you reinstall an existing control switch in the compressor, use a new O-ring and a new retainer ring. An O-ring and a retainer ring
is included in a new switch kit.
1. Lubricate the new O-ring using new 525 viscosity refrigerant oil.
2. Install the new O-ring into the groove in the switch.
3. Lubricate the control switch housing using new 525 viscosity refrigerant oil.
4. Install the switch (2) into the compressor until the switch bottoms in the cavity.