Home ReviewsRefund
Home/Subaru/Forester/Subaru Forester SG (2002-2005)/Repair manual/Heater/HVAC: Other
Contents Wiring diagrams Section: Heater All sections

HVAC: Other Subaru Forester SG

Heater 11 illustrations ~731 words

COMPRESSOR OIL

  1. HFC-134a compressor oil has no compatibility with that for R12 system.
  2. Use only the manufacturer-authorized compressor oil for the HFC-134a system; only use ZXL200PG.
  3. Do not mix multiple compressor oils. If HFC-12 compressor oil is used in a HFC-134a A/C system, the compressor may become stuck due to poor lubrication, or the refrigerant may leak due to swelling of rubber parts. On the other hand, if HFC-134a compressor oil is used in a HFC-12 A/C system, the durability of the A/C system will be lowered.
  1. HFC-134a compressor oil is very hygroscopic. When replacing or installing/removing A/C parts, immediately isolate the oil from the atmosphere using a plug or tape. In order to avoid moisture, store the oil in a container with its cap tightly closed.

REFRIGERANT

  1. The HFC-12 refrigerant cannot be used in the HFC-134a A/C system. The HFC-134a refrigerant, also, cannot be used in the HFC-12 A/C system.
  2. If an incorrect or no refrigerant is used, poor lubrication will result and the compressor itself may be damaged.

HANDLING OF REFRIGERANT

  1. The refrigerant boils at approx. -30°C (-22°F). When handling it, be sure to wear safety goggles and protective gloves. Direct contact of the refrigerant with skin may cause frostbite. If the refrigerant gets into your eye, avoid rubbing your eyes with your hands. Wash your eye with plenty of water, and receive medical treatment from an eye doctor.

Scheme 65

Scheme 65
Scheme 65
  1. Do not heat a service can. If a service can is directly heated, or put into boiling water, the inside pressure will become extremely high. This may cause the can to explode. If a service can must be warmed up, use hot water in 40°C (104°F) max.
  2. Do not drop or impact a service can. (Observe the precautions and operation procedure described on the refrigerant can.)
  3. When the engine is running, do not open the high-pressure valve of the manifold gauge. The high-pressure gas will back-flow resulting in an explosion of the can.
  4. Provide good ventilation and do not work in a closed area.
  5. In order to prevent global warning, avoid releasing HFC-134a into the atmosphere. Using a refrigerant recovery system, discharge and reuse it.

O-RING CONNECTIONS

  1. Use new O-rings.
  2. In order to keep the O-rings free of lint which will cause a refrigerant gas leak, perform operations without gloves and shop towels.
  3. Apply the compressor oil to the O-rings to avoid sticking, then install them.
  4. Use a torque wrench to tighten the O-ring fittings: Over-tightening will damage the O-ring and tube end distortion.

Scheme 66

Scheme 66
Scheme 66

Scheme 67

Scheme 67
Scheme 67

Scheme 68

Scheme 68
Scheme 68
  1. If the operation is interrupted before completing a pipe connection, recap the tubes, components, and fittings with a plug or tape to prevent contamination from entering.
  2. Visually check the surfaces and mating surfaces of O-rings, threads, and connecting points. If a failure is found, replace the applicable parts.
  3. Install the O-rings at right angle to the tube beards.
  4. Use the oil specified in the service manual to lubricate the O-rings. Apply the oil to the top and sides of the O-rings before installation. Apply the oil to the area including the O-rings and tube beads.
  1. After tightening, use a clean shop towel to remove excess oil from the connections and any oil which may have run on the vehicle body or other parts.
  2. If any leakage is suspected after tightening, do not retighten the connections, Disconnect the connections, remove the O-rings, and check the O-rings, threads, and connections.

PREPARATION TOOL

CAUTIONWhen working on vehicles with the HFC-134a system, only use HFC-134a specified tools and parts. Do not mix with CFC-12 tools and parts. If HFC-134a and CFC-12 refrigerant or compressor oil is mixed, poor lubrication will result and the compressor itself may be destroyed. In order to help prevent mixing HFC-134a and CFC-12 parts and liquid, the tool and screw type and the type of service valves used are different. The gas leak detectors for the HFC-134a and CFC-12 systems must also not be interchanged.

Scheme 69

Scheme 69
Scheme 69

Scheme 70

Scheme 70
Scheme 70

Scheme 71

Scheme 71
Scheme 71

MAGNETIC CLUTCH CLEARANCE

  1. Check the clearance of the entire circumference around the drive plate and pulley. Standard: 0.3 - 0.6 mm (0.0118 - 0.0236 in)

Scheme 72

Scheme 72: MAGNETIC CLUTCH OPERATION
Scheme 72: MAGNETIC CLUTCH OPERATION
  1. Disconnect the compressor connector.
  2. Connect the battery positive (+) terminal to the No. 3 terminal of the compressor connector.
  3. Make sure the magnet clutch engages. If NG, replace the compressor.

Scheme 73

Scheme 73: REMOVAL
Scheme 73: REMOVAL

Scheme 74

Scheme 74
Scheme 74

Scheme 75

Scheme 75
Scheme 75
  1. Perform the compressor oil return operation. Refer to «OPERATION»(ref-200802-S42441765782005102300000) , Compressor Oil.
  2. Turn the A/C switch OFF and stop the engine.
  3. Using the refrigerant recovery system, discharge refrigerant. Refer to «OPERATION»(ref-200802-S28881992342005102300000) , Refrigerant Recovery Procedure.
  4. Disconnect the ground cable from battery.
  5. Remove the V-belt. Refer to «REMOVAL»(ref-200788-S33926247212005102300000) , V-belt.
  6. Remove the generator. Refer to «REMOVAL»(ref-167630-S04585015172004101900000) , Generator.
  7. Remove the low-pressure hose and high-pressure hose.
  8. Disconnect the compressor harness from body harness.
  9. Loosen the bolts to remove compressor bracket.
  10. Remove the bolts and then separate compressor and bracket.

More articles — HVAC