Expansion Block/Orifice Tube: Service and Repair
EXPANSION (ORIFICE) TUBE REPLACEMENTTOOLS REQUIRED
J 39400-A Halogen Leak Detector
REMOVAL PROCEDURE
1. Remove the condenser tube.
2. Remove the expansion (orifice) tube:
2.1. Use needle-nose pliers in order to grip the orifice tube.
2.2. Use a turning motion along with a push-pull motion in order to loosen the impacted orifice tube.
2.3. Remove the orifice tube.
IMPORTANT: DO NOT use any solvents or chemicals to clean the expansion (orifice) tube porous plastic inlet filter.
3. Inspect the expansion (orifice) tube for the following conditions and clean or replace with a new tube as indicated:
^ Broken plastic frame (1); replace tube.
^ Inlet filter (3) damaged or plugged with fine gritty material; replace tube.
^ Inlet filter (3) coated with metal chips, flakes, or slivers; coating may be removed with low pressure shop air ONLY and reused if cleaned satisfactorily.
^ If reusing the tube, discard the O-ring seal (2).
INSTALLATION PROCEDURE
IMPORTANT: Lubricate the new O-ring seal (2) with mineral base 525 viscosity refrigerant oil.
1. Install the new O-ring seal (2) if reusing the orifice tube.
2. CAREFULLY grasp the edge of the expansion (orifice) tube (1) without touching the inlet filter (porous plastic) (3) and insert into the condenser tube until fully seated.
3. Install the condenser tube.