Thermo King Super II SR+, Manual, Page: 106 / 145

Refrigeration Service Operations (Rev 6/98)
96
THERMAX-V EXPANSION VALVE
Removal
1. Pump down the low side and equalize the pressure to
slightly positive.
2. Remove the grille, both idler pulleys, the fan belt, and
the fan module.
3. Remove the feeler bulb from the clamp. Note the posi-
tion of the feeler bulb on the suction line.
4. Remove the U-bolt that fastens the expansion valve to
the mounting bracket.
5. Unsolder the inlet and outlet connections and remove
the expansion valve from the unit.
Installation
1. Place the expansion valve in position and fasten it in
place with the U-bolt.
2. Solder the inlet and outlet connections.
3. Clean the suction line to a bright polished condition.
Install the feeler bulb clamps and the feeler bulb on the
side of the suction line in its former position. The feeler
bulb must make good contact with the suction line or
operation will be faulty. Wrap with insulating tape.
4. Pressurize the low side and test for leaks. If no leaks are
found, evacuate the low side.
5. Install the fan module, the fan belt, and both idler
pulleys. Tighten the fan belt to the proper tension, and
install the grille.
6. Open the refrigeration valves and place the unit in oper-
ation.
7. Test run the unit to check the operation of the expan-
sion valve.