Tools Required
J 39400-A Halogen Leak
Detector
Removal Procedure
- Recover the refrigerant from the A/C system. Refer to
Refrigerant Recovery and Recharging
.
- Remove the right wheelhouse panel. Refer to
Wheelhouse Panel Replacement
in Body Front End.
- Remove the air cleaner. Refer to the appropriate procedure:
• | Caterpillar® 3126 Unit Repair Manual |
- Disconnect the low pressure sensor electrical connector.
- Disconnect the blower motor assembly electrical connector.
- Disconnect the blower motor resistor assembly electrical connector.
- Remove the multi-use module bracket. Refer to the appropriate procedure:
• | Caterpillar® 3126 Unit Repair Manual |
- Remove the evaporator outlet hose retaining
nut (5) from the accumulator.
- Remove the compressor inlet hose retaining nut (2).
- Disconnect the low pressure sensor electrical connector.
- Remove the retaining nuts (3) from the accumulator retaining bracket.
- Remove the accumulator (5) from the bracket.
- Remove the O-ring seals.
- Remove the retaining nut (3) from
the evaporator inlet tube (5).
- Remove the evaporator inlet tube from the evaporator.
- Remove the O-ring seal.
- Remove the retaining nut (4) from
the evaporator outlet tube (3).
- Remove the evaporator outlet tube from the evaporator.
- Remove the O-ring seal.
- Remove the evaporator and blower module assembly (3).
Installation Procedure
- Install the evaporator and blower module assembly (3).
Notice: Refer to Fastener Notice in the Preface section.
- Install the evaporator and blower module assembly retaining nuts (2)
.
Tighten
Tighten the nuts to 6 N·m (53 lb in).
- Install new O-ring seals to the evaporator inlet and outlet tubes. Refer
to
O-Ring Replacement
.
- Install the evaporator inlet tube (4)
to the evaporator.
- Install the evaporator inlet tube retaining nut.
Tighten
Tighten the nut to 18 N·m (13 lb ft).
- Install the evaporator outlet tube (3)
to the evaporator.
- Install the evaporator outlet tube retaining nut.
Tighten
Tighten the nut to 18 N·m (13 lb ft).
- Install the accumulator (5) to the bracket.
- Install the nuts (3) to the accumulator retaining bracket
Tighten
Tighten the nuts to 9 N·m (80 lb in).
- Connect the low pressure sensor electrical connector.
- Install new O-ring seals. Refer to
O-Ring Replacement
.
- Install the evaporator outlet hose.
- Install the evaporator outlet hose retaining nut (5) to the accumulator.
Tighten
Tighten the nut to 18 N·m (13 lb ft).
- Install the compressor inlet hose.
- Install the compressor inlet hose retaining nut (2) to the accumulator.
Tighten
Tighten the nut to 18 N·m (13 lb ft).
- Install the multi-use module bracket. Refer to the appropriate procedure:
• | Caterpillar® 3126 Unit Repair Manual |
- Connect the low pressure sensor electrical connector.
- Connect the blower motor assembly electrical connector.
- Connect the blower motor resistor assembly electrical connector.
- Install the air cleaner. Refer to the appropriate procedure:
• | Caterpillar® 3126 Unit Repair Manual |
- Install the right wheelhouse panel. Refer to
Wheelhouse Panel Replacement
in Body Front End.
- Evacuate and recharge the A/C system. Refer to
Refrigerant Recovery and Recharging
.
- Leak test the fittings of the components using the J 39400-A
.