Hose/Line HVAC: Service and Repair

REFRIGERANT LINES REMOVAL/INSTALLATION

1. Disconnect the negative battery cable.
2. Discharge the refrigerant from the system.
3. Pull up the coolant reservoir.
4. Remove the fresh-air duct, radiator bracket, air cleaner, and resonance chamber.

CAUTION: If moisture or foreign material enters the refrigeration cycle, cooling ability will be lowered and abnormal noise will occur. Always immediately plug all open fittings after removing any refrigeration cycle parts to keep moisture or foreign material out of the cycle.




5. Remove in the order indicated below. Do not allow compressor oil to spill.
1. Cooler pipe No.1 (type A only)
2. Cooler pipe No.2
3. Cooler pipe No.3
4. Cooler hose (HI)
5. Cooler hose (LO)

6. Install in the reverse order of removal.
7. Perform the refrigerant system performance test.

Refrigerant Lines Removal Note

Nut joint type
1. Loosen the nut using 2 spanners, then remove the cooler pipe or hose.

Spring-lock coupling type




1. Set the SST.




2. While looking through the inspection hole of the SST, insert the protruding part of the SST until it makes contact with the gauge section.




3. Use the SST to disconnect the cooler hose (LO) from cooling unit by pulling the cooler hose (LO) side.

NOTE: The cooler hose (LO) can be disconnected easily from cooling unit by pulling from the cooler hose (LO) while maintaining the pressure of the protruding part of the SST.

Refrigerant Lines Installation Note
1. When installing a new cooler pipe or hose, add a supplemental amount of ATMOS GU10 compressor oil into the refrigeration cycle.

Supplemental amount: 5 ml (5 cc, 0.2 fl oz)

2. Apply compressor oil to the O-rings and connect the joints.
3. Tighten the joints.

Nut or block joint type
1. Tighten the nut or bolt of the joint by hand.
2. Tighten the joint to the specified torque wrench.

Spring-lock coupling type







1. Connect the cooler hose (LO) by twisting it onto cooling unit until the garter spring at the cooler hose (LO) is over the flared end of cooling unit.

NOTE: When the cooler hose (LO) is replaced, the indicator ring comes out after connecting to indicate that it is locked.