Operation CHARM
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GMC Truck
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1989
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C 3500 Truck 2WD V8-379 6.2L DSL
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Repair and Diagnosis
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Heating and Air Conditioning
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Compressor HVAC
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Service and Repair
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Major Compressor Repair Procedures
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With R-4 Compressor
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Pressure Relief Valve
Pressure Relief Valve
Compressor Component View:
Remove or Disconnect
1.
Valve.
2.
O-ring.
Install or Connect
1.
New O-ring coated with 525
refrigerant oil
.
2.
Valve.