Fisher A41 Instruction Manual page 21

Disassembly
1. If necessary, loosen the packing flange nuts (key 101). This allows the drive shaft (key 8) to turn without the friction
caused by the packing.
2. Remove the actuator, using the steps provided in the packing maintenance procedures above, and remove the seal
ring using the steps provided in the seal ring maintenance procedures above.
3. Place the valve on a flat working surface with the seal ring slot facing down.
4. Use blocks to raise the valve body high enough to allow the disc to be rotated to the fully open position (figure 7).
5. Rotate the disc (key 3) to the fully open position.
6. Locate the small ends of the taper pins. Drive the two taper pins (key 10) out towards the larger end of pins. (Note:
Attempting to drive the taper pins in the opposite direction only tightens the pins.) Also, remove the hollow pins
(key 9) from the disc/shaft connection using the tool shown in figure 11.
Note
Make the tools for removing and installing the hollow pin shown in figure 11.
7. Unscrew and remove the packing flange nuts (key 101), and the packing flange (key 102).
WARNING
Once the shaft has been removed in the following step, the disc may fall out of the valve body cavity. To avoid personal
injury and damage to disc sealing surfaces, support the disc to prevent it from falling as the shaft is being removed.
8. Pull the shaft out of the valve body, and remove the disc (key 3) from the valve body bore.
9. If the packing is to be replaced, remove all packing parts from the valve body. Upon re-assembly of the valve, refer
to the Packing Maintenance procedures to replace the packing.
10. Remove both of the bearings (key 6) from the valve body. For CL150 valves with metal bearings, refer to the
following note.
Note
CL150 valves with metal bearing assemblies have three parts. A disc spacer, bearing, and bearing spacer (keys 7, 6, and 13) are
used in place of a single piece bearing. The disc spacers may fall out of the valve when the disc is removed. If needed for
re-assembly, retain the disc spacer and bearing spacer parts.
11. Clean all of the sealing surfaces and parts, and inspect and/or replace before assembly.
Assembly
1. Install the bearings (key 6):
When installing the bearings in the opposite side of the valve body bore, repeat the following procedure.
D For PEEK/PTFE CL150 and CL300 metal bearings, one piece bearings: Position the bearing edge to match the valve
body bore, and insert the one piece bearing/disc spacer into the bearing bore with the bearing/spacer tab facing
away from the disc stop as shown in figure 10.
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