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8. Unscrew the seat retainer (Item 004) from the body Item (001) and remove the
seat (Item 003).
9. Clean the seat retainer.
10. Replace the seat (Item 003). Place the beveled (chamfered) side of the seat
facing out toward the sensor assembly stem. (The seat should have the
chamfer facing into the seat retainer thus the chamfer will face out when
retained in the regulator body.)
11. Install the seat retainer with the seat back into the body. Use a small amount
of anti-seize lubricant on the seat retainer threads.
Bonnet Disassembly/Reassembly
1. Remove the limit screw (Item 158) from the spring cap (Item 002).
2. Remove all components from the bonnet.
3. Clean and lubricate the bearing using a suitable lubricant.
4. Clean the spring cap and adjusting screw threads. Place a small amount of
anti-seize lubricant on the threads.
5. Clean the spring.
6. Reassemble the bonnet components. Install the limit screw.
7. Set the bonnet assembly aside for later installation.
Sensor Disassembly/Reassembly
1. Unscrew the spring pad (Item 105) from the sensor (Item 102) using the 1/2"
open end wrench and the large 1/2" wide screwdriver. You may wish to
clamp the spring pad in a vise to perform this step.
Caution: Small parts are present within the sensor assembly. Take care not to
lose the parts.
2. Pull the spring pad away from the sensor. Again, being careful not lose any
parts!
3. Retain the spacer (Item 106) for later use.
4. Remove the sensor components: Valve Stem (Item 101), Spring (Item 104),
Spacer (Item 106), Seal (Item 007) and Sensor backup (Item 103).
5. Remove and replace the backup rings and O-rings (Items 051, 053, 052 and
054) using the new seals from the rebuild kit. Lubricate the O-rings with a
suitable lubricant.
6. Replace the sensor internal components using the new internal components;
Valve Stem (Item 101), Spring (Item 104) and Seal (Item 007).
7. Reuse and reinstall the original spacer (Item 106).
8. Reassemble the sensor pad, sensor backup and sensor. Place a small amount
of anti-seize lubricant on the threads.
9. Discard all the used components.
SECTION 3 – MAINTENANCE
3-3
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