Expansion Block/Orifice Tube: Service and Repair

REMOVE
1. Discharge air conditioning system.
2. Evaporator inlet hose from evaporator.
3. Expansion tube from evaporator inlet hose.

INSPECT
1. Exansion tube.
^ Discard if the plastic frame is broken.
^ Discard if the filter screen is torn, damaged or plugged with fine gritty material.
^ Discard if the brass orifice tube is damaged or plugged.
^ Metal chips, flakes, or slivers found on the screen may be removed with low pressure shop air. The orifice tube may then be reused.

INSTALL
1. Expansion tube into evaporator inlet hose.

NOTE: When installing the expansion tube inside the evaporator inlet pipe, it must be installed with the shorter screen end inserted first.

2. Evaporator inlet hose to evaporator.
3. Evacuate and charge air conditioning system.