Expansion Block/Orifice Tube: Service and Repair

Expansion Tube (Orifice)

Remove or Disconnect

1. Discharge the system.
2. Loosen nut at liquid line to evaporator inlet pipe and remove tube carefully with needle-nosed pliers or special tools.

Install or Connect

1. New orifice tube with shorter screen end in first.
2. Liquid line and tighten to proper specification.
3. Evacuate and charge the system.

In the event that difficulty is encountered during the removal of a restricted or plugged expansion tube (orifice tube), see Testing and Inspection.