GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Isuzu 🢒 2000 🢒 Isuzu MD Steel Tilt (F Model) 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Air Conditioning Compressor Hose 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. Object Number: 229691 Size: SH

    Important: When removing the sealing washers, prevent dirt or foreign materials from getting on the surfaces of the following components:

       • The washers
       • The block fitting
       • The A/C compressor ports
    Clean all of the sealing surfaces with a lint-free rag.

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

    5. Object Number: 334243 Size: SH
  5. Remove the A/C compressor sealing washers.

    6. Discard the A/C compressor sealing washers.


    Object Number: 229709 Size: SH
  6. Remove the refrigerant hoses from the A/C compressor.

    7. Object Number: 229705 Size: SH
  7. Remove the refrigerant hose from the A/C condenser.
  8. Remove the O-ring seal.

    9. Discard the O-ring seal.


    Object Number: 229714 Size: SH
  9. Remove the refrigerant hose from the A/C evaporator.
  10. Remove the O-ring seal.

    11. Discard the O-ring seal.

  11. Remove the following components from the frame rail and the refrigerant hoses:
    12. • The hose clamp nuts
    • The washers
    • The bolts
    • The hose clamps

Installation Procedure

    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.

  1. Install the hose clamps to the refrigerant hoses and frame rail. Secure the hose clamps with bolts washers and nuts.

    2. Tighten
    Tighten the refrigerant hose clamp nuts to 30 N·m (22 lb ft).

  2. Coat the new O-ring seal with 525 viscosity refrigerant oil.

    3. Object Number: 229709 Size: SH
  3. Install the new O-ring seal into the A/C evaporator end of the refrigerant hose.

    4. Object Number: 229714 Size: SH
  4. Connect the refrigerant hose to the A/C evaporator.

    5. Tighten
    Tighten the refrigerant hose fitting at the A/C evaporator to 32 N·m (24 lb ft).

  5. Coat the new O-ring seal with 525 viscosity refrigerant oil.

    6. Object Number: 229705 Size: SH
  6. Install the new O-ring seal in the A/C condenser end of the refrigerant.
  7. Connect the refrigerant hose to the A/C condenser.

    8. Tighten
    Tighten the refrigerant hose fitting at the A/C condenser to 23 N·m (17 lb ft).

  8. Fill the refrigerant hoses. Refer to Refrigerant Oil Distribution Specifications .

    9. Object Number: 334249 Size: SH

    Important: When installing the sealing washers, prevent dirt or foreign materials from getting on the surfaces of the following components:

       • The washers
       • The block fitting
       • The A/C 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.

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

    10. Object Number: 229691 Size: SH
  10. Install the refrigerant hoses on the A/C compressor. Secure the compressor with the A/C compressor hose block fitting bolt.
  11. Hold the block in place. Hand tighten the A/C compressor block fitting bolt.

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

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