Ram Truck 1500, 2500 & 3500 (2006-2008)

Removal & Installation

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3.7L & 4.7L Engines




CAUTION
Before beginning this procedure, review the warnings and cautions in the front of this section. Only a MVAC-trained, EPA-certified, automotive technician should service the A/C system or its components.


NOTE
The compressor may be removed and repositioned without disconnecting the refrigerant lines or discharging the refrigerant system. Discharging is not necessary if servicing the compressor clutch or clutch coil, the engine, the cylinder head, or the generator.

  1. Recover the refrigerant from the refrigerant system, as outlined in this section.
  2.  
  3. Disconnect and isolate the battery negative cable.
  4.  
  5. Remove the accessory drive belt, as outlined in the Engine Mechanical Section.
  6.  
  7. Remove the nuts (4) that secure the A/C suction line (5) and the A/C discharge line (9) to the A/C compressor (6).

    Click image to see an enlarged view

    Fig. Remove the nuts (4) that secure the A/C suction line (5) and the A/C discharge line (9) to the A/C compressor (6)-3.7L & 4.7L Engines

  8.  
  9. Disconnect the refrigerant lines from the A/C compressor and remove and discard the seals.
  10.  
  11. Install plugs in, or tape over all of the opened refrigerant line fittings and the compressor ports.
  12.  
  13. Loosen the bolt (5) that secures the bracket (7) to the accessory mounting bracket (4).
  14.  
  15. Remove the three bolts (1, 6 and 3) that secure the A/C compressor (2) to the accessory mounting bracket.
  16.  
  17. Remove the A/C compressor from the engine compartment.

    Click image to see an enlarged view

    Fig. Loosen the bolt (5) that secures the bracket (7) to the accessory mounting bracket (4), then remove the three bolts (1, 6 and 3) that secure the A/C compressor (2) to the accessory mounting bracket-3.7L & 4.7L engines

  18.  

To install:


NOTE
If a replacement compressor is being installed, be certain to check the refrigerant oil level. Use only refrigerant oil of the type recommended for the compressor in the vehicle. Refrigerant oil must be added when a accumulator, evaporator coil or condenser are replaced. When a compressor is replaced, the refrigerant oil must be drained from the old compressor and measured. Drain all of the refrigerant oil from the new compressor, then fill the new compressor with the same amount of refrigerant oil that was drained out of the old compressor.

  1. Position the A/C compressor (2) onto the accessory mounting bracket (4).
  2.  
  3. Install and tighten the bolts in the following sequence:
    1. Install bolt (3) and hand tighten.
    2.  
    3. Install bolt (6) and hand tighten.
    4.  
    5. Install bolt (1) and hand tighten.
    6.  
    7. Tighten bolt (3) to 30 ft. lbs. (40 Nm).
    8.  
    9. Tighten bolt (6) to 41 ft. lbs. (55 Nm).
    10.  
    11. Tighten bolt (1) to 41 ft. lbs. (55 Nm).
    12.  
    13. Tighten bolt (5) to 41 ft. lbs. (55 Nm).
    14.  

  4.  
  5. Remove the tape or plugs from the opened refrigerant line fittings and the compressor ports.
  6.  
  7. Lubricate new seals with clean refrigerant oil and install them onto the refrigerant line fittings. Use only the specified seals as they are 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.
  8.  
  9. Install the A/C suction line and the A/C discharge line onto the A/C compressor.
  10.  
  11. Install the nuts that secure the refrigerant lines to the A/C compressor. Tighten the nuts to 15 ft. lbs. (20 Nm).
  12.  
  13. Install the accessory drive belt.
  14.  
  15. Reconnect the negative battery cable.
  16.  
  17. Evacuate and charge the refrigerant system, as outlined in this section.
  18.  

5.7L Engine




CAUTION
Before beginning this procedure, review the warnings and cautions in the front of this section. Only a MVAC-trained, EPA-certified, automotive technician should service the A/C system or its components.


NOTE
The compressor may be removed and repositioned without disconnecting the refrigerant lines or discharging the refrigerant system. Discharging is not necessary if servicing the compressor clutch or clutch coil, the engine, the cylinder head, or the generator.

  1. Recover the refrigerant from the refrigerant system, as outlined in this section.
  2.  
  3. Disconnect and isolate the battery negative cable.
  4.  
  5. Remove the accessory drive belt, as outlined in the Engine Mechanical Section.
  6.  
  7. Disconnect the wire harness connector from the clutch field coil connector on top of the A/C compressor (6) and the A/C pressure transducer (8) on the A/C discharge line (1).
  8.  
  9. Remove the nuts (4 and 7) that secure the A/C discharge line and the A/C suction line (5) to the A/C compressor.

    Click image to see an enlarged view

    Fig. Disconnect the wire harness connector from the clutch field coil connector on top of the A/C compressor (6) and the A/C pressure transducer (8) on the A/C discharge line (1). Remove the nuts (4 and 7) that secure the A/C discharge line and the A/C suction line (5) to the A/C compressor-5.7L engines

  10.  
  11. Disconnect the refrigerant lines from the A/C compressor and remove and discard the O-rings and dual plane seals.
  12.  
  13. Install plugs in, or tape over all of the opened refrigerant line fittings and the compressor ports.
  14.  
  15. Remove the generator support bracket from the front of the engine.
  16.  
  17. Remove the three bolts that secure the A/C compressor to the mounting bracket.
  18.  
  19. Remove the A/C compressor from the engine compartment.
  20.  

To install:


NOTE
If a replacement compressor is being installed, be certain to check the refrigerant oil level. Use only refrigerant oil of the type recommended for the compressor in the vehicle. Refrigerant oil must be added when a accumulator, evaporator coil or condenser are replaced. When a compressor is replaced, the refrigerant oil must be drained from the old compressor and measured. Drain all of the refrigerant oil from the new compressor, then fill the new compressor with the same amount of refrigerant oil that was drained out of the old compressor.

  1. Position the A/C compressor into the engine compartment.
  2.  
  3. Install and tighten the bolts that secure the A/C compressor to the mounting bracket in the following sequence:
    1. Install the two lower bolts and hand-tighten.
    2.  
    3. Install the rear bolt and hand-tighten.
    4.  
    5. Tighten the two lower bolts to 30 ft. lbs. (40 Nm).
    6.  
    7. Tighten the rear bolt to 41 ft. lbs. (55 Nm).
    8.  

  4.  
  5. Install the generator support bracket.
  6.  
  7. Remove the tape or plugs from the opened refrigerant line fittings and the compressor ports.
  8.  
  9. Lubricate new O-rings and dual plane seals with clean refrigerant oil and install them onto the refrigerant line fittings. Use only the specified seals as they are 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.
  10.  
  11. Install the A/C discharge line and the A/C suction line onto the A/C compressor.
  12.  
  13. Install the nuts that secure the refrigerant lines to the A/C compressor. Tighten the nuts to 15 ft. lbs. (20 Nm).
  14.  
  15. Connect the wire harness connector to the clutch field coil connector and the A/C pressure transducer.
  16.  
  17. Install the accessory drive belt.
  18.  
  19. Reconnect the negative battery cable.
  20.  
  21. Evacuate and charge the refrigerant system, as outlined in this section.
  22.  

5.9L & 6.7L Diesel Engines




CAUTION
Before beginning this procedure, review the warnings and cautions in the front of this section. Only a MVAC-trained, EPA-certified, automotive technician should service the A/C system or its components.


NOTE
The compressor may be removed and repositioned without disconnecting the refrigerant lines or discharging the refrigerant system. Discharging is not necessary if servicing the compressor clutch or clutch coil, the engine, the cylinder head, or the generator.

  1. Recover the refrigerant from the refrigerant system, as outlined in this section.
  2.  
  3. Disconnect and isolate the battery negative cable.
  4.  
  5. Remove the accessory drive belt, as outlined in the Engine Mechanical Section.
  6.  
  7. Disconnect the wire harness connector from the clutch coil connector of the A/C compressor (6).
  8.  
  9. Remove the bolt (7) that secure the A/C suction and discharge line assembly (8) to the A/C compressor.

    Click image to see an enlarged view

    Fig. Disconnect the wire harness connector from the clutch coil connector of the A/C compressor (6). Remove the bolt (7) that secure the A/C suction and discharge line assembly (8) to the A/C compressor.

  10.  
  11. Disconnect the refrigerant line assembly from the A/C compressor and remove and discard the seals. Install plugs in, or tape over all of the opened refrigerant line fittings and the compressor ports.
  12.  
  13. Remove the four bolts that secure the A/C compressor to the mounting bracket located on the right side of the cylinder block.
  14.  
  15. Remove the A/C compressor from the engine compartment.
  16.  

To install:


NOTE
If a replacement compressor is being installed, be certain to check the refrigerant oil level. Use only refrigerant oil of the type recommended for the compressor in the vehicle. Refrigerant oil must be added when a accumulator, evaporator coil or condenser are replaced. When a compressor is replaced, the refrigerant oil must be drained from the old compressor and measured. Drain all of the refrigerant oil from the new compressor, then fill the new compressor with the same amount of refrigerant oil that was drained out of the old compressor.

  1. Position the A/C compressor into the engine compartment.
  2.  
  3. Install and hand-tighten the four bolts that secure the A/C compressor to the mounting bracket. Tighten the bolts that secure the A/C compressor to the mounting bracket to 17 ft. lbs. (23 Nm).
  4.  
  5. Remove the tape or plugs from the opened refrigerant line fittings and the compressor ports.
  6.  
  7. Lubricate new seals with clean refrigerant oil and install them onto the refrigerant line fittings. Use only the specified seals as they are 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.
  8.  
  9. Install the A/C suction and discharge line assembly onto the A/C compressor.
  10.  
  11. Install the bolt that secures the refrigerant line assembly to the A/C compressor. Tighten the bolt to 20 ft. lbs. (28 Nm).
  12.  
  13. Connect the wire harness connector to the clutch coil connector of the A/C compressor.
  14.  
  15. Install the accessory drive belt.
  16.  
  17. Reconnect the negative battery cable.
  18.  
  19. Evacuate and charge the refrigerant system, as outlined in this section.
  20.  

 
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