RAM 3500 Van V8-360 5.9L VIN 5 Magnum (1998)
flow of refrigerant in the system. High pressures are produced in the refrigerant system when the air conditioning compressor is operating. Extreme care
must be exercised to make sure that each of the refrigerant system connections is pressure-tight and leak free.
WARNING: REVIEW THE WARNINGS AND CAUTIONS IN THE GENERAL INFORMATION BEFORE PERFORMING THE
FOLLOWING OPERATION.
REMOVAL
1. Disconnect and isolate the battery negative cable.
2. Remove the low pressure cut-off switch from the fitting on the suction line jumper. See Low Pressure Cut-Off Switch Replacement for the
procedures.
3. Recover the refrigerant from the refrigerant system.
Suction Line Jumper Remove/Install
4. Disconnect the flare nut on the suction line from the threaded fitting on the suction line jumper. Install plugs in, or tape over all of the opened
refrigerant line fittings.
5. If the vehicle is equipped with the optional rear heater-A/C unit, go to Step 7. If not, go to Step 9.
6. Disconnect the flare nut on the underbody plumbing suction line from the threaded fitting on the suction line jumper. Install plugs in, or tape over
all of the opened refrigerant line fittings.
7. Disconnect the flare nut on the underbody plumbing liquid line from the threaded fitting on the liquid line extension. Install plugs in, or tape over
all of the opened refrigerant line fittings.
8. Remove the screw that secures the filter-drier to its mounting bracket.
9. Remove the screw that secures the block fitting of the suction line jumper to the outlet of the filter-drier, and separate the fitting from the
fitter-drier. Install plugs in, or tape over all of the opened refrigerant line fittings.
10. Remove the screw that secures the block fitting of the suction line jumper to the expansion valve, and separate the fitting from the expansion valve.
Install plugs in, or tape over all of the opened refrigerant line fittings.
11. Remove the suction line jumper from the engine compartment.
INSTALLATION
1. Remove the tape or plugs from the block fitting on the suction line jumper and the expansion valve. Position the suction line jumper block fitting
to the expansion valve and secure the connection with a screw. Tighten the mounting screw to 22 N.m (200 in. lbs.).
2. Remove the tape or plugs from the block fitting on the suction line jumper and the outlet of the fitter-drier. Position the outlet of the filter-drier to
the suction line jumper block fitting and secure the connection with a screw. Tighten the mounting screw to 13.5 N.m (120 in. lbs.).
3. Reinstall the screw that secures the filter-drier to its mounting bracket. Tighten the mounting screw to 8.5 N.m (75 in. lbs.).
4. If the vehicle is equipped with the optional rear heater-A/C unit, go to Step 6. If not, go to Step 8.
5. Remove the tape or plugs from the refrigerant tine fittings on the underbody plumbing liquid line and the liquid line extension. Connect the flare
nut on the underbody plumbing liquid line to the threaded fitting on the liquid line extension. Tighten the fitting to 27 N.m (244 in. lbs.).
6. Remove the tape or plugs from the refrigerant line fittings on the underbody plumbing suction line and the suction line jumper. Connect the flare
nut on the underbody plumbing suction line to the threaded fitting on the suction line jumper. Tighten the fitting to 47 N.m (420 in. lbs.).
7. Remove the tape or plugs from the refrigerant line fittings on the suction line and the suction line jumper Connect the flare nut on the suction line
to the threaded fitting on the suction line jumper. Tighten the fitting to 47 N.m (420 in. lbs.).
8. Install the low pressure cut-off switch to the fitting on the suction line jumper. See Low Pressure Cut-Off Switch.
9. Connect the battery negative cable.
10. Evacuate the refrigerant system.
11. Charge the refrigerant system.
