Hummer H3. Manual — part 1263

Fig. 3: Draining A/C Refrigerant Oil From Compressor
Courtesy of GENERAL MOTORS CORP.

2. Measure and record the amount of oil drained from the removed compressor. This

measurement will be used during installation of the replacement compressor.

3. Properly discard the used refrigerant oil.

2007 Hummer H3

2007 HVAC Heating, Ventilation and Air Conditioning - H3

Balancing Procedure

1. The Denso replacement compressor is shipped with 74 ml (2.5 oz.) of refrigerant oil.

IMPORTANT: The refrigerant oil in the A/C system must be balanced

during compressor replacement.

2007 Hummer H3

2007 HVAC Heating, Ventilation and Air Conditioning - H3

Fig. 4: Draining A/C Refrigerant Oil From Compressor
Courtesy of GENERAL MOTORS CORP.

2. Before installing the compressor, the refrigerant oil will have to be fully drained.

3. Add back the same quantity of PAG oil as drained from the removed compressor.

Refer to the amount of refrigerant oil recorded during the compressor removal.

COMPRESSOR REPLACEMENT

Tools Required

J 39400-A Halogen Leak Detector

Removal Procedure

1. Recover the air conditioner (A/C) refrigerant. Refer to Refrigerant Recovery and

Recharging.

2. Remove the drive belt. Refer to Drive Belt Replacement (Without A/C) or Drive Belt

Replacement (With A/C) .

3. Remove the cooling fan and shroud. Refer to Fan Replacement .

4. Disconnect the A/C compressor electrical connector.

5. Remove the left front tire. Refer to Tire and Wheel Removal and Installation .

6. Remove the left front wheelhouse panel. Refer to Wheelhouse Panel Replacement

(Front) or Wheelhouse Panel Replacement (Rear) .

IMPORTANT: Some system pressure may still exist in the A/C compressor

crankcase after you evacuate the system.

2007 Hummer H3

2007 HVAC Heating, Ventilation and Air Conditioning - H3

Fig. 5: Identifying Discharge Hose
Courtesy of GENERAL MOTORS CORP.

7. Remove the A/C discharge hose bolt 2 from the A/C compressor.

8. Remove the A/C suction hose bolt 3 from the compressor.

9. Remove the A/C compressor hoses (1,4) from the A/C compressor.

10. Remove and discard the sealing washers.

2007 Hummer H3

2007 HVAC Heating, Ventilation and Air Conditioning - H3