Fisher CV500 Instruction Manual page 17

Instruction Manual
D101640X012
opposite side of the ear is a smaller hole where the chamfered end of the expansion pin rests on the inner lip of the
hole.
9. For NPS 10 and 12, drive out the groove pin that secures the ball to the drive shaft. Remove the groove pin from the
ball ear in the direction shown in figure 6.
WARNING
To avoid personal injury or damage to tools, valve parts, or other items resulting from the ball (key 2) falling from the valve
body, support the ball to prevent it from falling as the drive shaft (key 3) is being removed.
10. Pull the drive shaft (key 3) from the valve body. If the shaft cannot be removed by hand, attach a slide hammer or
similar tool to the spline end of the shaft that was attached to the actuator. If the shaft has a tapped hole at the
spline end of the shaft, refer to table 7 for thread sizes.
11. Remove the ball (key 2), and thrust washers (key 12) from the valve body. (If using 17‐7PH thrust washers there will
be two, if using alloy 6 there will only be one thrust washer.)
Figure 6. Taper and Expansion Pin Removal from Ball and Drive Shaft
DRIVE PINS OUT
FROM THIS END
(SMALLER HOLE)
E0575
Note
For NPS 3 through 8, two shaft bearings (key 6) are located inside the valve body on either side of the ball. Only one of these two
bearings is identified by key 6. The other bearing is located along the drive shaft on the other side of the V‐notch ball.
For NPS 10 and 12, there are two shaft bearings. One is identified as key 6, and the other is identified as key 42.
12. If the shaft bearings are to be replaced, remove the packing (key 13).
13. If the bearing closest to the packing (key 6 on NPS 3 through 8 and key 42 on NPS 10 and 12) requires replacement
and cannot be removed by hand, press it out using a ram with dimensions as given in figure 7. The ram has a smaller
diameter than the bearing stop (key 7) so the bearing stop need not be removed when pressing out the bearing on
the drive shaft. Insert the ram through the packing box and press the bearing into the valve body cavity. Take care
not to move the bearing stop when pressing out the bearing.
14. For NPS 3 through 8, if the second bearing (key 6) requires replacement and cannot be removed by hand, use one
of the following methods:
SLASH MARK ON SPLINED
END OF SHAFT
CV500 Valve
June 2017
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