Expansion Valve: Service and Repair

Expansion Valve

Expansion valve, servicing

• Observe notes --> [ A/C Refrigerant System ] A/C Refrigerant System





1 Bolts

• 12 Nm

• Qty. 2

2 Refrigerant lines on expansion valve

3 O-ring

• 13.7 mm; 2.5 mm

4 Expansion valve

Removing

- Evacuate refrigerant circuit using refrigerant recycling/recovery unit Kent-Moore ACR4 (or UL approved equivalent)

CAUTION!
• Frostbite danger!

• High pressure refrigerant may leak out if refrigerant circuit is not discharged.

• Always evacuate refrigerant prior to opening refrigerant circuit.

- Remove bolts --> [ 1 Bolts ] and disconnect refrigerant lines --> [ 2 Refrigerant lines on expansion valve ] from expansion valve.

- Remove bolts --> [ 8 Combination bolt ] and remove expansion valve.

Installing

- Install in reverse order of removal, noting the following:

- Charge refrigerant circuit using refrigerant recycling/recovery unit Kent-Moore ACR4 (or UL approved equivalent)

• Capacities --> [ A/C Refrigerant System Capacities ] [1][2]Capacity Specifications

5 O-ring

• 14 mm; 1.82 mm

• Coat with refrigerant oil when installing

6 O-ring

• 10.8 mm; 1.82 mm

• Coat with refrigerant oil when installing

7 O-ring

• 9.5 mm; 2.5 mm

8 Combination bolt

• 5 Nm

Expansion Valve, Function

• The expansion valve restricts and controls refrigerant flow to the evaporator thus lowering refrigerant temperature and pressure.