Fisher A11 Instruction Manual page 14

A11 Valve
A5249/IL
The disc must be removed from the
waterway side of the valve body, which
is the side opposite the T-slot area.
Support the valve and disc so the disc
can be easily removed from the valve
when the shaft is removed.
3. Use a pin extractor to remove the disc pins
(key 6). Select the proper pin extractor tip with
screws of proper thread size to match the thread
size in the disc pins.
4. Screw the pin extractor tip into the pin as far as
possible. With an upward, straight sliding motion,
extract the pin. Repeat the same procedure for the
other pins.
A threaded rod with an appropriate spacer and nut
can also be used as an extractor tool. If using a
threaded rod, choose a rod with threads that fit the
inside threads of the pins. The rod should extend
14
Figure 8. Packing Configurations
Note several inches above the disc when screwed into a
pin.
5. After screwing the rod into the pin, slide the
spacer over the rod and pin. Thread the nut onto the
rod and tighten. As the nut is tightened, it will drive
the spacer against the disc and the increasing
pressure will draw the pin from the disc.
6. Loosen the packing nuts (key 16).
7. Extract the shaft (key 4) by hand-pulling or by
using the pin extractor screwed into the end of the
shaft.
Valves with a two-piece shaft use a
gasket retainer, which must be
removed before removing the lower
shaft.
Note