LINE-A/C LIQUID
DESCRIPTION
NOTE: LHD model shown. RHD model similar.
The A/C liquid line (1) is the refrigerant line that carries refrigerant from the receiver/drier to the A/C expansion valve (2). The A/C liquid is serviced in one section and is secured to the right side frame (3) rail by two plastic retainer clips (4).
NOTE: Replacement of the refrigerant line O-ring seals and gaskets is required anytime a refrigerant line is opened. Failure to replace the rubber O-ring seals and metal gaskets could result in a refrigerant system leak.
The A/C liquid line has no serviceable parts except the O-ring seals and gaskets. The O-ring seals used on the connections are made from a special type of rubber not affected by R-134a refrigerant. The O-ring seals and gaskets must be replaced whenever the A/C liquid line is removed.
The A/C liquid line cannot be repaired and must be replaced if found to be leaking or damaged.
REMOVAL
WARNING: Refer to the applicable warnings and cautions for this system before performing the following operation (refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - FRONT - WARNING) and (refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - FRONT - CAUTION). Failure to follow the warnings and cautions could result in possible personal injury or death.
NOTE: LHD model with 5.7L engine shown. RHD model and other engines similar.
1. Disconnect and isolate the negative battery cable.
2. Recover the refrigerant from the refrigerant system (refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - FRONT - STANDARD PROCEDURE - REFRIGERANT SYSTEM RECOVERY).
3. Remove the air cleaner housing, air intake tube and the resonator (refer to 9 - ENGINE/AIR INTAKE SYSTEM/HOUSING-AIR CLEANER - REMOVAL).
4. Remove the nut (3) that secures the A/C suction line (2) and the A/C liquid line (10) to the A/C expansion valve (1).
5. Disconnect the A/C suction line from the A/C expansion valve and remove and discard the O-ring seal.
6. Remove the nut (1) that secures the A/C liquid line (2) to the A/C receiver/drier (3).
7. Disconnect the A/C liquid line from the A/C receiver/drier and remove and discard the dual plane seal.
8. Disengage the two liquid line retainer clips (4) from the right frame rail (3). If required remove the clips from the liquid line
9. Disconnect the A/C liquid line (1) from the A/C expansion valve (2) and remove and discard the O-ring seal.
10. Install plugs in, or tape over the opened liquid and suction line fittings and the receiver/drier and expansion valve ports.
11. Remove the A/C liquid line from the engine compartment.
INSTALLATION
CAUTION: Be certain to adjust the refrigerant oil level when servicing the A/C refrigerant system (refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - FRONT/REFRIGERANT OIL - STANDARD PROCEDURE - REFRIGERANT OIL LEVEL). Failure to properly adjust the refrigerant oil level will prevent the A/C system from operating as designed and can cause serious A/C compressor damage.
NOTE: When replacing multiple A/C system components, refer to the Refrigerant Oil Capacities chart to determine how much oil should be added to the refrigerant system (refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - FRONT/REFRIGERANT OIL - STANDARD PROCEDURE - REFRIGERANT OIL LEVEL).
NOTE: Replacement of the refrigerant line O-ring seals and gaskets is required anytime a refrigerant line is opened. Failure to replace the rubber O-ring seals and metal gaskets could result in a refrigerant system leak.
1. Position the A/C liquid line (1) into the engine compartment.
2. Remove the tape or plugs from the opened liquid and suction line fittings and the receiver/drier and expansion valve ports.
3. Lubricate a new O-ring seal with clean refrigerant oil and install it onto the rear liquid line fitting. Use only the specified seal as it is made of a special material for the R-134a system. Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.
4. Connect the A/C liquid line to the A/C expansion valve (2) and engage the two liquid line retainer clips (4) to the frame rail (3).
5. Lubricate a new dual plane seal with clean refrigerant oil and install it onto the front liquid line fitting. Use only the specified seal as it is made of a special material for the R-134a system. Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.
6. Connect the A/C liquid line (2) to the A/C receiver/drier (3).
7. Install the nut (1) that secures the A/C liquid line to the A/C receiver/drier. Tighten the nut to 20 N·m (15 ft. lbs.).
NOTE: LHD model with 5.7L engine shown in illustration. RHD model and other engines similar.
8. Lubricate a new O-ring seal with clean refrigerant oil and install it onto the rear suction line fitting. Use only the specified seal as it is made of a special material for the R-134a system. Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.
9. Connect the A/C suction line (2) to the A/C expansion valve (1).
10. Install the nut (3) that secures the A/C suction line and the A/C liquid line (10) to the A/C expansion valve. Tighten the nut to 23 N·m (17 ft. lbs.).
11. Install the air cleaner housing, air intake tube and the resonator (refer to 9 - ENGINE/AIR INTAKE SYSTEM/HOUSING-AIR CLEANER - INSTALLATION).
12. Reconnect the negative battery cable.
13. Evacuate the refrigerant system (refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - FRONT - STANDARD PROCEDURE - REFRIGERANT SYSTEM EVACUATE).
14. Adjust the refrigerant oil level (refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - FRONT/REFRIGERANT OIL - STANDARD PROCEDURE - REFRIGERANT OIL LEVEL).
15. Charge the refrigerant system (refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - FRONT - STANDARD PROCEDURE - REFRIGERANT SYSTEM CHARGE).