Tools Required
• | J 26549-E
Orifice Tube Remover and Installer |
Removal Procedure
- Recover the refrigerant from the A/C system. Refer to
Refrigerant Recovery and Recharging
.
- Remove the air cleaner. Refer to the appropriate procedure:
• | Caterpillar® 3126 Unit Repair Manual for the 7.2L (Caterpillar) engine |
- Remove the evaporator inlet tube retaining nut from the evaporator.
- Use the
J 26549-E
in order to remove the expansion tube (1).
- If the expansion tube is stuck perform the following:
• | Remove as much of the impacted residue as possible. |
• | Carefully apply heat with a heat gun, or hair dryer 7 mm (0.25 in) from the dimples on the inlet pipe. |
• | DO NOT overheat the pipe. |
• | While applying heat, use the
J 26549-E
in order to grip the expansion tube. Use a turning motion along with a push-pull motion to loosen the impacted expansion tube and remove. |
Installation Procedure
Important:
• | Install the shorter screen end (3) first into the evaporator. |
• | Coat the O-ring seal (2) with 525 viscosity refrigerant oil. |
- Use the
J 26549-E
in order to install the expansion tube.
- Install new sealing washers to the evaporator tube. Refer to
Sealing Washer Replacement
.
- Install the evaporator tube to the evaporator.
Notice: Refer to Fastener Notice in the Preface section.
- Install the evaporator tube retaining nut to the evaporator.
Tighten
Tighten the nut to 16 N·m (12 lb ft).
- Install the air cleaner. Refer to the appropriate procedure:
• | Caterpillar® 3126 Unit Repair Manual for the 7.2L (Caterpillar) engine |
- 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
.