1008 Handwheel Actuator
Instruction Manual
December 2009
4
describes actuator disassembly for general
inspection and replacement.
For Size 30:
1. Remove the stem connector assembly (key 24).
2. Unscrew the set screw (key 13) from the yoke
(key 26) and remove the steel balls (key 33) through
the threaded hole.
Note
Be careful not to lose the ball (key 33)
and spring (key 34) as the handwheel
is removed.
3. Remove the handwheel (key 28) and stem screw
assembly (key 38) from the yoke (key 26).
4. Unscrew the handwheel (key 28) from the stem
screw assembly (key 38).
For Sizes 40 & 50:
1. Remove the stem connector assembly (key 24).
2. Unscrew the hex nut (key 14) and remove the
washer (key 41) and lockwasher (key 42).
Note
Be careful not to lose the ball (key 33)
and spring (key 34) as the handwheel
is removed.
3. Remove the handwheel (key 28) from the stem
screw assembly (key 38).
4. Loosen the set screw (key 13) and unscrew the
bearing retainer (key 44).
5. Remove the stem screw assembly (key 38),
thrust bearings (key 2), and nut (key 43) from the
yoke (key 26).
6. Remove the nut from the stem screw assembly
(key 38) to reach the remainder of the parts.
For Size 80:
1. Remove the stem connector assembly (key 24).
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).
