Tools Required

J 39400-A Halogen Leak Detector

1. Tilt the cab. Refer to Cab Tilting in General Information.
2. Recover the refrigerant from the A/C system. Refer to Refrigerant Recovery and Recharging .



3. Remove the A/C compressor hose assembly bolt.



4. Remove the sealing washers and discard.



5. Remove the compressor hoses assembly from the A/C compressor.



6. Remove the compressor hose assembly from the A/C condenser.
7. Remove the O-ring seal and discard.



8. Remove the compressor hose assembly from the evaporator.
9. Remove the O-ring seal and discard.
10. Remove the following components from the frame rail and the refrigerant hoses:

•	The hose clamp nuts

•	The washers

•

The bolts

•	The hose clamps

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 the frame rail. Secure the hose clamps with the bolts, the washers and the nuts.

Tighten
Tighten the nuts to 30 N·m (22 lb ft).

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



3. Install the new O-ring seal in the A/C evaporator end of the refrigerant hose.



4. Connect the refrigerant hose to the A/C evaporator.

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. Install the new O-ring seal in the A/C condenser end of the refrigerant hose assembly.
7. Connect the refrigerant hose to the A/C condenser.

Tighten
Tighten the fitting to 23 N·m (17 lb ft).





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.

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



9. Install the compressor hose assembly to the A/C compressor.
10. Hold the block in place. Hand tighten the A/C compressor block fitting bolt.

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

11. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
12. Leak test the fitting(s) of the repaired or reinstalled component using the J 39400-A .
13. Lower the cab. Refer to Cab Tilting in General Information.