Thermo King T-500R Maintenance Manual page 237

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7. Oil the gasket and install the end cap.
8. Throttling valve will have to be recalibrated on operating unit. (Refer to "Specifications" chapter for setting.)
9. Adjust by adding or removing shims under the spring.
Installation
1. Install the throttling valve using new o-ring soaked in compressor oil (same type of oil that is used in the system). Bolt the
throttling valve to the compressor.
2. Connect the suction hose from the throttling valve to the accumulator tank. Install line from the compound gauge.
3. Pressurize the system and check for leaks. If no leaks are found, evacuate the system.
4. Open the refrigeration valves and place the unit in operation.
1. Tighten Castle Nut to Bottom—Then
Back Off 1 Turn Only. Insert Cotter Pin.
Throttle Valve Piston Assembly
Refrigeration Maintenance 10-53