Thermo King SB-III 30 SR+, Manual

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Refrigeration Service Operations (Rev. 04/02)
71
3. Unsolder the inlet and outlet suction lines from the
accumulator.
CAUTION: Use a heat sink or wrap vibra-
sorber with wet rags to prevent damaging the
vibrasorber.
4. Disconnect the tee fitting from the accumulator tank.
5. Unbolt and remove the accumulator from the unit.
Installation
1. Place the accumulator in the unit and tighten the
mounting bolts and nuts.
2. Solder the inlet and outlet suction lines to the accumu-
lator.
CAUTION: Use a heat sink or wrap vibra-
sorber with wet rags to prevent damaging the
vibrasorber.
3. If applicable, connect the water lines to the accumulator
tank.
4. Connect the tee fitting and lines to the accumulator.
5. Pressurize the low side and test for refrigerant leaks. If
no leaks are found, evacuate the low side.
6. Open the refrigeration valves and place the unit in oper-
ation. Check the refrigerant charge and the compressor
oil, and add as required.
THREE-WAY VALVE REPAIR
NOTE: The three-way valve can be repaired in the unit if
leakage or damage to the Teflon seals should occur. There
is usually enough give in the copper tubing to separate the
three sections of the valve without unsoldering any tubes.
Removal/Disassembly
1. Remove the refrigerant charge.
2. Clean the exterior surface of the valve.
3. Remove the line from the three-way valve to the pilot
solenoid.
4. Loosen the four 1/4 in. Allen head screws (DO NOT
REMOVE OR CAP MAY POP OFF); use tool P/N
204-424 to break the gasket at each side of the center
section.
CAUTION: Do not force the tool into the brass
or against the bolts.
Gasket Tool P/N 204-424
5. Remove the four bolts from the valve.
6. Remove the top cap and spring.
7. Remove the spring clip. Observe the slot in the piston
and slide piston off the stem.
8. Remove the seat and stem assembly.
9. Inspect the following parts for wear or damage:
a. Bottom cap, sealing and support area.
b. Seat, sealing surface.
c. Top cap, sealing and support surface.