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Home >> Isuzu >> 1998 >> Trooper S, Standard >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> General Servicing >> A/C Compressor Refrigerant Oil Checking >> HARRISON >> Hd6/Ht6 6-Cylinder >> Hombre 4.3L & Trooper

Hombre 4.3L & Trooper

  1. If possible, operate A/C system before checking refrigerant oil level. Open engine hood and all doors. Turn A/C on and set blower motor to high speed. Start engine and operate at 800-1000 RPM for more than 20 minutes. Turn engine off and go to next step. If A/C system cannot be operated, go to step 4).
  2. Discharge A/C system, using approved refrigerant recovery/recycling equipment. Remove compressor from vehicle. Drain and measure refrigerant oil from old compressor through suction and discharge ports. Inspect refrigerant oil for contamination. If oil volume has increased, oil color has changed, or debris is present, receiver-drier must be replaced.
  3. If less than 3.0 ounces of refrigerant oil is drained from old compressor, inspect A/C system for oil leaks. Repair or replace components as necessary. Add 3.0 ounces of NEW refrigerant oil to replacement compressor. If more than 3.0 ounces of refrigerant oil is drained from old compressor, add NEW refrigerant oil to replacement compressor equal to amount drained from old compressor.
  4. If A/C system cannot be operated, discharge A/C system, using approved refrigerant recovery/recycling equipment. Remove compressor. Drain and measure refrigerant oil from old compressor through suction and discharge ports. Inspect refrigerant oil for contamination. If oil volume has increased, oil color has changed, or debris is present, receiver-drier must be replaced.
  5. If more than 3.0 ounces is drained from old compressor, add NEW refrigerant oil to replacement compressor equal to amount drained from old compressor. Install compressor and go to step 8).
  6. If less than 3.0 ounces of refrigerant oil is drained from old compressor, add 3.0 ounces of NEW refrigerant oil to replacement compressor and install on vehicle. Evacuate and charge A/C system. Open engine hood and all doors. Turn A/C on and set blower motor to high speed. Start engine and operate at 800-1000 RPM for more than 20 minutes to stabilize system. Turn engine off and go to next step.
  7. Remove replacement compressor from vehicle. Drain and measure refrigerant oil. If more than 3.0 ounces is drained from compressor, add NEW refrigerant oil to compressor equal to amount drained. If less than 3.0 ounces of refrigerant oil is drained from replacement compressor, add 3.0 ounces of NEW refrigerant oil to compressor. Go to next step.
  8. If replacing other A/C system components, add specified amount of NEW refrigerant oil to component. See COMPONENT REFRIGERANT OIL CAPACITIES (ACURA & ISUZU - HARRISON HD6/HT6 6-CYL.) table. Evacuate, charge and leak test A/C system. Ensure A/C system is operating properly.
COMPONENT REFRIGERANT OIL CAPACITIES (HARRISON HD6/HT6 6-CYL.)

Component Ounces
Compressor (1)
Condenser 1.0
Evaporator 1.7
Receiver-Drier 1.0
Refrigerant Line 0.3
(1) Drain and measure refrigerant oil from old compressor. If old compressor had less than 3.0 ounces, add 3.0 ounces of NEW refrigerant oil to replacement compressor. If old compressor had more than 3.0 ounces, add NEW refrigerant oil equal to amount drained from old compressor.
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