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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 186 (Heating, Ventilation, And Air Conditioning) >> Repair Instructions >> Expansion (Orifice) Tube Replacement (W/C69-HP2)

Expansion (Orifice) Tube Replacement (W/C69-HP2)

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Fig 1: Expansion (Orifice) Tube Replacement (W/C69-HP2)
GM1965601Courtesy of GENERAL MOTORS CORP.
Callout Component Name

Preliminary Procedures

  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging (Non HP2)  or Refrigerant Recovery and Recharging (HP2) .
  2. Remove the air cleaner outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement .
  3. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
1 Orifice Tube Fitting
NOTE: Refer to Fastener Notice .

Tip: 
  • It may be necessary to remove the auxiliary pressure line to separate the orifice tube.
  • Loosen orifice tub fitting and separate the pressure line to access the orifice.

Tighten:  9 N.m (80 lb in)

2 O-ring Seal
Tip:  Remove and discard O-ring. Refer to O-Ring Replacement .
3 Orifice Tube Assembly
Tip:  Use to remove orifice tube.
Special Tools: 
J 26549-E  Orifice Tube Remover. See Special Tools .