Type 1008
4
2. Unscrew the cap screws (key 12) and remove the
gear case cover (key 11).
3. Unscrew the two socket head cap screws (key 37)
and remove the retaining flange (key 35).
4. Remove the bearing and gear retainer (key 4) and
the stem screw assembly (key 38).
5. Remove the thrust bearings (key 2) and worm gear
(key 3) from the stem screw assembly (key 38).
Note
Be careful not to lose the ball (key 33)
and spring (key 34) as the handwheel is
removed.
6. To remove the worm shaft (key 9):
a. Remove the set screw from the handwheel cap
(key 32).
b. Unscrew the handwheel cap and remove the
handwheel (key 28).
c. Loosen the front (nearest to the threaded end of
the worm shaft) set screw (key 10) and unscrew
the front worm retainer (key 7).
d. Remove the ball bearing (key 8) and the worm
shaft.
For Size 100:
1. Remove the stem connector assembly (key 24).
2. Unscrew the cap screws (key 12) and remove the
gear case cover (key 11).
3. Remove the bearing and gear retainer (key 4) and
the stem screw assembly (key 38).
4. Remove the thrust bearings (key 2) and worm gear
(key 3) from the stem screw assembly (key 38).
5. To remove the worm shaft (key 9):
a. Remove the retaining ring (key 17).
b. Loosen the set screw (key 10) found on the
handwheel (key 28) hub.
c. Remove the handwheel (key 28).
d. Loosen the set screw (key 10) and remove the
front (nearest to the threaded end of the worm
shaft) worm retainer (key 7), worm shaft (key 9),
and front ball bearing (key 8).
Assembly
For Size 30:
1. Replace the spring (key 34) and ball (key 33) in the
yoke (key 26).
2. Screw the handwheel (key 28) on the stem screw
assembly (key 38).
3. Position the grooves in the handwheel (key 28) and
yoke (key 26) to mate, then replace the steel balls
(key 33) in the yoke through the threaded hole.
4. Replace the set screw (key 13).
5. Refer to the Installation procedures for instructions
on connecting the valve plug stem to the actuator
stem screw assembly (key 38).
For Sizes 40 & 50:
1. Replace the thrust bearings (key 2) and bearing
seat (key 45) on the stem screw assembly (key 38).
Screw the nut (key 43) on the stem screw assembly.
Note
Verify that the key (key 16) fits into the
slot milled in the yoke (key 26) before
reassembly.
2. Place the stem screw assembly (key 38) in the
yoke (key 26).
3. Replace the bearing retainer (key 44), tightening so
that the thrust bearings (key 2) move freely, then tight-
en the set screw (key 13).
4. Place the ball (key 33) in one of the indentations on
the yoke, then place the handwheel (key 28) with the
spring (key 34) over the ball.
5. Replace the lock washer (key 42) and washer (key
41) on the stem screw assembly (key 38) and tighten
the hex nut (key 14).
6. Refer to the Installation procedures for instructions
on connecting the valve plug stem to the actuator
stem screw assembly (key 38).
For Size 80:
1. If the worm shaft (key 9) was removed during dis-
assembly:
a. Replace the worm shaft with the ball bearing
(key 8) and the front worm retainer (key 7).
b. Adjust the worm retainer to eliminate end play
(movement of the worm shaft along its axis) while
allowing adequate movement.
c. Tighten the set screw (key 10) on the front re-
tainer.
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