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Home >> GMC >> 1995 >> Forward Control 4.3 Z, Standard >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> General Servicing >> A/C Compressor Refrigerant Oil Checking >> Checking Compressor Oil >> HARRISON Hd6/Hr6-He 6-Cylinder, Hr100T & Hr110-MD 4-Cylinder, & V5 5-Cylinder

HARRISON Hd6/Hr6-He 6-Cylinder, Hr100T & Hr110-MD 4-Cylinder, & V5 5-Cylinder

  1. Operate system for several minutes to stabilize system, if possible. Turn engine off. Discharge A/C system using approved refrigerant recovery/recycling equipment. Remove compressor. Drain refrigerant oil through compressor drain plug and measure oil.
  2. If no oil leaks exist and more than one ounce is drained, add drained amount using new oil. If less than one ounce is drained, add 2 ounces of new oil.
  3. If replacing A/C components, add specified amount of refrigerant oil to system. See HD6/HR6-HE, HR100T, HR110-MD & V5 COMPONENT REFRIGERANT OIL CAPACITIES table. Install drain plug and compressor. Evacuate and recharge system. Perform leak test.
NOTE: Approximately 3 ounces of refrigerant oil, suspended in refrigerant, will be lost due to a large, abrupt leak. When replacing faulty component, add required amount of oil for component plus 3 ounces of oil to component. If oil cannot be easily added to component, add to accumulator/receiver-drier.
HD6/HR6-HE, HR100T, HR110-MD & V5 COMPONENT REFRIGERANT OIL CAPACITIES

Component Ounces
Accumulator/Receiver-Drier
"G" Body 3.5
Except "G" Body (1)
Condenser 1.0
Evaporator 3.0
"U" Body
Rear Evaporator 2.0
Rear Evaporator Lines 1.0
(1) Add one ounce more than was drained from oil accumulator/receiver-drier.