Chassis Electrical

AIR CONDITIONER

Refrigerant Lines

Fig. 1: O-ring installation

Fig. 2: Applying refrigerant oil to the O-ring

Fig. 3: Proper refrigerant line installation

Fig. 4: Tightening the refrigerant line connection

1. Disconnect the negative battery cable.
2. Properly discharge the air conditioning system using an approved recovery/recycling machine.
3. Remove chassis, engine or body parts, if required for line removal.
4. If removing a line secured with a nut, use a suitable flare-end or backup wrench loosen, disconnect and immediately plug the refrigerant line.
5. If removing a line attached with a retainer bolt, loosen and remove the retainer bolt using a suitable wrench or socket. Immediately plug the open connection.
6. Remove and discard the sealing O-ring.
7. Disconnect the pressure switch wire connectors, if required.
8. Remove all attaching brackets and bolts.
9. Remove the refrigerant lines.

To install:

10. Apply a light coat of refrigerant oil to new O-rings, and install on the refrigerant line.
11. If the line is secured with a nut, tighten the nut to 14-22 ft. lbs. (20-29 Nm).
12. If the line is secured with a retainer bolt, tighten the bolt to 7-14 ft. lbs. (10-20 Nm.

Tighten the refrigerant line to the previously given valves, unless the procedure requires a different tightening value.

13. Route refrigerant lines in the original locations.
14. Use original securing brackets and bolts.
15. Evacuate, charge and check system for leaks using an approved recovery/recycling machine.

END OF SECTION