Disassembly; Assembly - Fisher V150 Instruction Manual

14 through 20-Inch Design V150 and V300
Refer to the Ball Seal Replacement procedures to
remove the seal from the valve.
Install an ''eye'' bolt into the threaded hole within the
V-notch ball cavity (see figure 9). (Note: The eye bolt pro-
vides a method for lifting and controlling the rotation of
the V-notch ball during the following procedures. (Read
the following Warning.)
When ball seal disassembly steps are complete,
return to this section.
If you have not already done so, place the valve on a
flat protected working surface with the seal side down,
prior to removing and installing the V-notch ball and
bearings. Key numbers in this procedure are shown in
figure 9, unless otherwise indicated.

Disassembly

WARNING
When the actuator is removed from the
valve, the V-notch ball may suddenly ro-
tate, resulting in personal injury. To
avoid injury, carefully rotate the V-notch
ball to a stable position.
Once the drive and follower shafts have
been removed from the valve body, the
V-notch ball may fall out of or into the
valve body. To avoid personal injury or
damage to the sealing surfaces of the
V-notch ball, provide a hoist to support
the V-notch ball to prevent it from falling
as the shafts are being removed.
1. Carefully lift the valve and set it on the edge of the
flanges so the V-notch ball is in the open position, and
in the down position. (Note: The weight the V-notch
ball should turn it into the open position.) Block the
drive end of the valve body to hold the shaft in a hori-
zontal position.
2. Drive the pins (key 7) out of the drive shaft and out
of the follower shaft (keys 6 and 9).
Both pins are tack welded to the ball ears. To remove
a pin, insert a pin punch into the open hole, opposite
the tack welded side, and break the tack weld while
driving the pin out.
3. Carefully lift the valve and place the valve on the
working surface with the seal side down (read the
Warning above).
Because of the weight of the ball, it should rotate so
the contoured sealing surface of the ball is resting on
the surface.
10
4. Remove the flange nuts (key 47), the bottom flange
(key 44), and gasket (key 45) from the valve. Use a
hoist to lift valve body slightly.
Make sure the sealing surface of the V-notch ball is
not damaged while removing the follower shaft (key 9).
5. Push the follower shaft (key 9) into the center of
the V-notch ball. For valves with metal bearings, re-
move the thrust washer (key 38).
6. Pull the drive shaft (key 6) out of the actuator side
of the valve body. For valves with metal bearings, re-
move the thrust washer (key 38).
7. Removing the bearings (key 10):
a. For PEEK bearings, remove the bearings by
hand. If the bearings are tight in the valve body, pull
or drive them out with a slight pressure.
b. For metal bearings, use a press and ram to
remove the drive shaft bearings out of the valve
body. Refer to figure 6 ram dimensions.
To remove the follower shaft bearing from the bot-
tom flange (key 44), use a blind-hole bearing puller simi-
lar to CG2545AB, which is made by Snap-on Tools. If you
do not have such a tool, you can machine the bearing out
of the bottom flange.
For proper shutoff performance, the ball
and seal require the bearing (key 10) to
be positioned correctly. If you removed
the bearings (key 10), be sure to locate
the new bearings as shown in figure 6.
8. Thoroughly clean all surfaces of parts that are to be
re-used or obtain replacement parts. Upon reassem-
bly, the pins needs to be tack welded to the V-notch
ball ears. Remove excess weld material if the parts
are to be used during re-assembly.

Assembly

1. Inspect all sealing surfaces to ensure they are in
good condition and without scratches or wear. Thor-
oughly clean all parts and make sure they are free of
oil or grease.
2. Installing bearings (key 10):
a. For PEEK bearings, install the drop-in bearings
by hand. The bearing flanged end should touch the
drive shaft bearing support surface (see figure 9).
Also, install the bearing (key 10) into the bottom
flange (key 44). The bearing flange should touch
the surface of the bottom flange.
b. For metal bearings (key 10):
Note