GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Isuzu 🢒 1998 🢒 Isuzu MD Steel Tilt (F Model) 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 Compressor Sealing Washers 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. Remove 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. Object Number: 230251 Size: SH

    Important: When removing the sealing washers, prevent dirt and foreign material from getting on the sealing surfaces of the washers, block fitting or A/C compressor ports. Clean all of the sealing surfaces with a lint-free cloth.

  4. Remove the compressor hose block fitting bolt from the A/C compressor.

    5. Object Number: 334243 Size: SH
  5. Remove the sealing washers.

    6. Discard the A/C compressor sealing washers.


    Object Number: 334249 Size: SH
  6. Remove the A/C compressor hoses.

Installation Procedure

    Object Number: 334249 Size: SH

    Important: When installing the sealing washers, prevent dirt and foreign material from getting on the sealing surfaces of the washers, block fitting or A/C compressor ports. Clean all of the sealing surfaces with a lint-free cloth.

    Do not reuse the sealing washers.

    Do not oil the sealing washers prior to assembly.

  1. Install new sealing washers onto the pilots of the block fitting. Ensure that the washers bottom against the surface of the block fitting.

    2. Object Number: 230251 Size: SH
  2. Install the A/C compressor hoses onto the A/C compressor. Secure the hoses with the A/C compressor hose block fitting washer and the bolt.

    3. 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.

  3. Hold the block in place. Hand tighten the A/C compressor block fitting bolt.

    4. Tighten
    Tighten the A/C compressor hose block fitting bolt to 35 N·m (26 lb ft).

  4. Connect the negative battery cables.
  5. Add refrigerant to the system. Refer to Refrigerant Recovery and Recharging .
  6. Inspect the system for leaks. Refer to Leak Testing .
  7. Lower the cab.