Thermo King SLXi Spectrum, Maintenance Manual

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Refrigeration Service Operations 11-15
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 movement in the copper tubing to separate the three sections of the valve without unsoldering any tubes.
Removal
1. Recover the refrigerant charge.
2. Clean the exterior surface of the valve.
3. Unsolder the copper line from the three-way valve to the pilot solenoid.
4. Loosen the 4 Allen head screws (DO NOT remove). Use tool #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.
5. Remove the 4 bolts from the valve.
6. Remove the top cap and spring.
7. Remove the spring clip. Observe the slot in the spool shaft and slide piston off the stem.
8. Remove the seat and stem assembly.
9. Inspect the following parts for wear and damage:
a. Bottom cap sealing and support areas.
b.Seat, sealing surface.
c. Top cap, sealing and support surface.
d.The following parts will be discarded:
e. Stem assembly.
f. All gaskets.
g.Teflon seal and O-ring (or PTFE seal).
10. Remove the screen. If any particles drop from the screen into the discharge line, the discharge line must be removed at the
compressor and the particles removed.
NOTE: The valve body cannot be reconditioned. Seat positions change and incorrect sealing will result.