Side-Mounted Handwheel Assembly For Size 34 Through 60 Actuators - Fisher 667 Instruction Manual

667 Size 30-76 and 87 Actuators
June 2011
CAUTION
Over-tightening the diaphragm cap screws and nuts (keys 13 and 14) can damage the diaphragm. Do not exceed 27 NSm
(20 lbfSft) torque.
Note
Do not use lubricant on these bolts and nuts. Fasteners must be clean and dry.
5. Slide the extension rod (key 150) into the handwheel screw (key 160), and position the diaphragm casing (key 1,
figures 6, 7, and 8) with the attached parts on the diaphragm. Install the cap screws and hex nuts (keys 13 and 14,
figures 6, 7, and 8) and tighten in the following manner.
6. The first four bolts tightened should be diametrically opposed and 90 degrees apart. Tighten these four bolts to 13
NSm (10 lbfSft).
7. Tighten the remaining bolts in a clockwise, criss-cross pattern to 13 NSm (10 lbfSft).
8. Repeat this procedure by tightening four bolts, diametrically opposed and 90 degrees apart, to a torque of 27 NSm
(20 lbfSft).
9. Tighten the remaining bolts in a clockwise, criss-cross pattern to 27 NSm (20 lbfSft).
10. After the last bolt is tightened to 27 NSm (20 lbfSft), all of the bolts should be tightened again to 27 NSm (20 lbfSft)
in a circular pattern around the bolt circle.
11. Once completed, no more tightening is recommended.
12. Lubricate and install the thrust bearings (keys 180 and 181), install the bearing retainer (key 182), install the castle
nut (keys 166) on the extension rod. Do not overtighten the castle nut on the bearing. Install the cotter pin (key
167). Replace the cap (key 247).
13. Refer to the Assembly portion of the Actuator maintenance section.

Side-Mounted Handwheel Assembly for Size 34 through 60 Actuators

A side-mounted handwheel assembly (figures 13 and 14) is usually used as a manual actuator. This design is frequently
used to drive the valve open or closed under loading conditions. Turning the handwheel clockwise past the neutral
position always closes a push-down-to-close valve. A pair of levers (key 146, figure 13) on a handwheel assembly close
the valve by moving the valve stem.
Instructions are given below for disassembly and assembly. Perform the disassembly only as far as necessary to
accomplish the required maintenance; then begin the assembly at the appropriate step.
Disassembly for Side-Mounted Handwheel (34-60)
1. If desired, the handwheel assembly can be removed from the actuator yoke. To do this, remove the nuts (keys 147
and 170) from the U-bolts (keys 166 and 143) that hold the assembly to the yoke.
2. Remove the retaining ring (key 154), and drive out the lever pivot pin (key 153).
3. Two screws (key 156) hold the right- and left-hand levers (key 146) together. Remove the screw from the top of the
levers so that the levers will drop down out of the assembly. Disassemble further, if necessary, by removing the
other screw.
4. Remove the screw (key 161) and pointer mounting bolt (key 159, not shown) located behind the pointer (key 160).
5. Remove the nut (key 54), lockwasher (key 150), and washer (key 149), and take off the handwheel (key 51). Be
careful not to lose the small ball (key 55) and spring (key 56).
18
Instruction Manual
D100310X012