Fisher V150 Instruction Manual page 11

For the valve body, use a press and ram to install
the bearings. Refer to figure 6 for dimensions and toler-
ances of the ram and bearings.
Press the bearing in until it is flush with the valve
body (key 1).
The acceptable tolerance for bearing location is: flush
with the valve body to 0.06 inches (1.5 mm) inside the
bearing bore. That is, the bearings should not protrude
into the flow cavity of the valve.
Press the bearing into the bottom flange, using the
same tolerances shown for bearing installation into the
valve body.
WARNING
The V-notch ball might be damaged if it is
allowed to fall into the valve body. To
avoid personal injury or damage to the
sealing surfaces, support the V-notch ball
to prevent it from falling into the valve
body cavity.
3. Installing the V-notch ball, drive and follower
shafts (keys 2, 6, and 9):
If you have not already done so, place the valve
body (key 1) on a flat protected working surface with the
seal side flat on the working surface.
In the the next step, make sure the splined ear of
the V-notch ball is aligned with the packing box side of the
valve body.
CAUTION
The V-notch ball might be damaged if it
is allowed to hit the flange edge or inte-
rior of the valve cavity while it is being
lowered into the valve body.
Using the ''eye'' bolt in the center of the V-notch ball
cavity, lift the V-notch ball above the valve. Carefully,
start lowering the ball, splined ear first, down into the
valve body through the outlet flange. When the ball ear
enters the valve body, it needs to be misaligned with the
drive shaft bearing support.
As the ball clears the outlet opening, turn and rotate
the ball as necessary to align the splined ball ear with
the drive shaft bearing support (see figure 9).
Allow the ball to come to rest on the contoured sealing
surface of the ball on the protected surface.
14 through 20-Inch Design V150 and V300
4. Carefully lift the valve body until the drive shaft (key
6) can be inserted through valve shaft bore and bear-
ing (key 10), and into the drive shaft/splined ear of the
the V-notch ball. [Note: (1.) See note 1, figure 9. (2.)
For valves with metal bearings, hold the thrust washer
(key 38, figure 9) in place before inserting the drive
shaft.]
Make sure that the ''O'' mark on the shaft aligns with
the ''O'' mark on the ball ear, within the ball cavity. In-
sert the drive shaft (key 6) into the V-notch ball. If the
''O'' marks are aligned correctly, the drive shaft pin
(key 7) should slide through the ball ear and drive
shaft.
With the valve body still lifted, align the V-notch ball
follower shaft bore with the opening in the valve body for
the lower flange (key 44). [Note: For valves with metal
bearings, hold the thrust washer (key 38, figure 9) in
place before inserting the follower shaft.] While aligning
the pin holes, insert the follower shaft into the V-notch
ball.
Place the gasket (key 45) in position on the bottom
flange (key 44). Insert the bottom flange into the valve
body, onto the follower shaft, and thread the bottom
flange nuts (key 47) onto the studs (key 46). Hand tighten
the nuts.
5. Installing the pins (key 7):
Lift the valve and place it on the edge of both
flanges. Make sure the V-notch ball is in its open position,
and in the lower half of the valve cavity (Read the pre-
vious Warning). Block the packing box side of the valve
so the drive shaft is horizontal.
Insert the pin (key 7) into the ball ear and follower
shaft until it is flat with the ball ear surface. (Note: the pin
does not extend the full width of the ball ear.
Refer to the Packing Replacement procedures and
install the packing parts as described in that section.
Slightly tighten the packing nuts (key 20).
Using a pry bar, insert the bar between the ball ear
and the follower shaft side of the valve body. Move the
ball tightly towards the packing box side of the valve
body, and against the bearing flange or thrust washer.
The V-notch ball should be centered within the seal cav-
ity.
Again, insert the bar between the ball ear and the
follower shaft side of the valve body. While holding the
ball in place, tighten the packing box nuts (key 20).
If the V-notch ball is not held in place while tightening
the packing box nuts, the ball will move to an off-cen-
ter position.
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