1008 Handwheel Actuator
Instruction Manual
December 2009
6
race with the smaller inside diameter is adjacent to
the worm gear web.
6. Replace the bearing and gear retainer (key 4).
7. Replace the gear case cover (key 11) and fasten
with the cap screws (key 12).
8. Adjust the six set screws (key 13) to eliminate
end play (movement along the axis of the stem
screw assembly) in the thrust bearings, while
allowing adequate movement.
9. Replace the stem connector assembly (key 24).
10. Refer to the Installation procedures for
instructions on connecting the valve plug stem to the
actuator stem screw assembly (key 38).
Reversing Handwheels
Refer to the previous Disassembly and Assembly
sections in this manual for additional instructions, as
needed.
To reverse 1008 handwheel actuators sizes 30, 40,
or 50, substitute left- or right-hand screw assemblies
(key 38). The standard size 100 is not reversible. To
reverse size 80, refer to figure 4 while performing the
following procedures:
1. Loosen the three set screws (key 10) in the gear
case (key 1) and handwheel cap (key 32).
Note
Be careful not to lose the ball (key 33)
and spring (key 34) as the handwheel
is removed.
2. Unscrew the handwheel cap (key 32) and remove
the handwheel (key 28).
3. Remove the front worm retainer (key 7), ball
bearing (key 8), and worm shaft (key 9).
4. Remove the back worm retainer (key 6) and ball
bearing (key 8).
5. Screw the back worm retainer (key 6) and ball
bearing (key 8) into the opening in the gear case
(key 1) where the front worm retainer is located.
6. Replace the front worm retainer (key 7) and ball
bearing (key 8).
7. Replace the spring (key 34) and ball (key 33),
handwheel (key 28), and handwheel cap (key 32).
8. Tighten the three set screws (key 10) in the gear
case (key 1) and handwheel cap (key 32).
Parts Ordering
Each actuator has a serial number stamped on the
nameplate. Always mention this number when
corresponding with your Emerson Process
Management sales office regarding technical
information or replacement parts. Also, reference the
complete 11-character part number of each needed
part as found in the following Parts List.
WARNING
Use only genuine Fisher replacement
parts. Components that are not
supplied by Emerson Process
Management should not, under any
circumstances, be used in any Fisher
valve, because they may void your
warranty, might adversely affect the
performance of the valve, and could
cause personal injury and property
damage.
Note
Neither Emerson, Emerson Process
Management, nor any of their affiliated
entities assumes responsibility for the
selection, use, or maintenance of any
product. Responsibility for the
selection, use, and maintenance of any
product remains with the purchaser
and end user.
Parts List
Note
Part numbers are shown for recommended spares
only. For part numbers not shown, contact your
Emerson Process Management sales office.
Key
Description
1 Gear
Case
2
Bearing, steel (2req’d)
3
Worm Gear, bronze
4
Bearing & Gear Retainer, brass
5
Power Screw, steel (size 100)
6
Back Worm Retainer, steel (sizes 80 & 100)
7
Front Worm Retainer, steel (sizes 80 & 100)
8
Ball Bearing, steel (2req’d)
9
Worm Shaft, alloy steel
