GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Isuzu 🢒 1998 🢒 Isuzu MD Steel Tilt (F Model) 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 Air Conditioning Compressor Replacement

Removal Procedure
  1. Tilt the cab. Refer to Cab Tilting in General Information.

    2. Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  2. Disconnect the negative battery cables. Refer to Battery Replacement in Engine Electrical.
  3. Discharge and recover the refrigerant from the system. Refer to Refrigerant Recovery and Recharging .
  4. Remove the drive belt. Refer to Engine Mechanical.
  5. Remove the electrical connector from the compressor, as necessary.

    6. Object Number: 230251 Size: SH
  6. Remove the compressor clamp fitting bolt.

    7. Object Number: 221215 Size: SH

    Important: When removing sealing washers, keep dirt and foreign material from getting on the following sealing surfaces:

       • The washers
       • The hose fittings
       • The compressor ports
    Clean all of the sealing surfaces with a lint-free rag.

  7. Remove the compressor sealing washers. Discard the compressor sealing washers.
  8. Remove the refrigerant hoses.

    9. Object Number: 368472 Size: SH
  9. Remove the idler pulley adjusting bolt.
  10. Remove the bolts from the mounting bracket.

Installation Procedure
  1. Fill the compressor. Refer to Refrigerant Oil Distribution Specifications .

    2. Object Number: 368472 Size: SH
  2. Position the compressor on the mounting bracket.
  3. Install the bolts on the mounting bracket. Do not tighten at this time.

    4. Object Number: 221216 Size: SH

    Important: When installing the sealing washers, keep dirt and foreign material from getting on the following sealing surfaces:

       • The washers
       • The hose fittings
       • The compressor ports
    Clean all of the sealing surfaces with a lint-free rag.

    Do not reuse the sealing washers.

    Do not oil the sealing washers prior to assembly.

  4. Install new sealing washers onto the pilots of the fittings. Ensure that the washers bottom against the surface of the fittings.

    5. Object Number: 230251 Size: SH
  5. Install the refrigerant hoses on the compressor hose fittings bolt.

    6. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  6. Hold the block in place. Hand tighten the compressor hose fittings bolt.

    7. Tighten
    Tighten the compressor hose fittings bolt to 35 N·m (26 lb ft).

  7. Install the electrical connector to the compressor.
  8. Install the drive belt and idler pulley adjusting bolt.

    9. Tighten
    Tighten the mounting bracket bolts to 22 N·m (16 lb ft).

  9. Install the electrical connector to the compressor.
  10. Install the drive belt and the idler pulley adjusting bolt.

    11. Tighten
    Tighten the mounting bracket bolts to 22 N·m (16 lb ft).

  11. Install the negative battery cables.
  12. Install the refrigerant to the system. Refer to Refrigerant Recovery and Recharging .
  13. Inspect the system for leaks. Refer to Leak Testing .
  14. Lower the cab.