Thermo King SB-210, Manual

Page: 125 / 159

Refrigeration Service Operations
125
Disassembly
1. Remove the piston end cap (round end).
2. Remove the cotter pin from the castle nut and
remove the nut.
3. Remove the spring and piston.
4. Loosen all the bolts on the bellows end cap.
5. Break the gasket free and remove the end cap.
6. Note the number of shims next to the cap.
These can be reused.
7. Remove the bellows.
8. Inspect all the parts.
a. Piston and cap for wear (scuff marks).
b. Body for stripped threads.
c. Bellows end cap for damage in the pilot
hole.
NOTE: The bellows is normally replaced.
9. Clean the parts that will be reused.
Reassembly
1. Install the bellows with the O-ring in the
housing.
2. Center the spring on the bellows shoulder.
3. Oil the gasket, install it on the housing, and
place the shims in the end cap (use same
number as removed). Tighten the end cap in
place with the vent hole closest to the outlet
opening of the valve housing.
4. Install the piston, spring and tighten the castle
nut until it is firmly seated against the bottom
of the piston.
CAUTION: This end cap is under slight
spring pressure.
1. Inspect Cap
2. Inspect Spring
3. Shims
Figure 111: Inspect Parts
1. Inspect for Wear
Figure 112: Inspect for Wear
1. Inspect for Damage
Figure 113: Inspect for Damage