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HVAC System General Servicing.: Installation

  1. To install orifice tube, coat inside of inlet pipe with refrigerant oil. Lubricate new orifice tube and "O" ring with refrigerant oil and insert them into inlet pipe.
  2. Install orifice tube with shorter screen end first (toward evaporator). To complete installation, reverse removal procedure. Recharge and test system for proper operation.
ORIFICE TUBE LOCATION & REMOVER/INSTALLER APPLICATION

Application Orifice Tube Location Orifice Tube Remover/Installer
Cars
"A" Body Condenser (1)
"B" Body Condenser J-26549-E
"C" & "H" Bodies Condenser J-26549-E
"D" Body Condenser J-26549-E
"E" & "K" Bodies Evaporator J-26549-D
"G" Body Evaporator J-26549-E
"J" Body Condenser - See Fig 1. J-26549-89
"W" Body Condenser J-26549-E
"Y" Body Evaporator J-26549-E
Trucks & Vans
"C" & "K" Series Condenser J-26549-E
"G" & "P" Series Evaporator J-26549-D
"L" & "M" Series Evaporator J-26549-E
"S" & "T" Series (1) (1)
"U" Series (2) J-26549-E
(1) Information is not available from manufacturer.
(2) In condenser-to-evaporator core refrigerant lines, near support clamp or high-side service valve.
Fig 1: Orifice Tube Location (Cavalier)
G00037190Courtesy of GENERAL MOTORS CORP.
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