Side-Mounted Handwheel For Sizes 70 And 87 Actuators - Emerson Fisher 657 Instruction Manual

Instruction Manual
D100306X012
7. Use step a. for size 34 through size 60 actuators, and use step b. for sizes 34i through 60i.
a. For Size 34 through 60: If the handwheel assembly was removed from the yoke (key 9, figures 6, 8, or 10),
remount the handjack assembly to the yoke using the dowel pins for alignment. For the size 34 and size 40,
position the U-bolts and J-bolts (keys 166 and 143) on the yoke, and hand-tighten the hex nuts (keys 170 and
147) to hold the handwheel assembly in position. For the size 45 through size 60, position the U-bolts (keys 166
and 143) on the yoke, and hand-tighten the hex nuts (keys 170 and 144) to hold the handwheel assembly in
position. Cap screws (key 163) should be tight against the yoke legs to provide stability. Tighten the nuts (key
144 for size 30 and size 40, key 158 for the size 45 through size 60). For the size 34 and size 40 finish tightening
the U-bolt nuts to 81 N•m [60lbf•ft] (key170) and 41 N•m [30 lbf•ft] (key 147). For the sizes 45 through 60
finish tightening the U-bolt nuts to 163 N•m [120lbf•ft] (key170) and 41 N•m [30 lbf•ft] (key 144). Be sure the
handwheel assembly remains flat against the mounting pad and perpendicular to the yoke.
b. For Size 34i through 60i: If the handwheel assembly was removed from the yoke (key 9, figures 7, 9, or 10),
remount the handjack assembly to the yoke using the dowel pins for alignment. Position the upper cap screws
(key 256) on the assembly and hand-tighten to hold the handwheel assembly in position. Place the spacers (key
258) between the yoke and handjack assembly, position cap screws (key 257), and hand-tighten. For the size
34i and size 40i, finish tightening the cap screws (key 256) to 81 N•m [60 lbf•ft] and (key 257) to 41 N•m
[30 lbf•ft]. For the sizes 45i through 60i, finish tightening the cap screws (key 256) to 163 N•m [120 lbf•ft] and
(key 257)to 41 N•m [30 lbf•ft].
8. Position the levers (key 146) as shown in figures 11 or 12. Insert the lever pivot pin (key 153), and snap the retaining
ring (key 154) onto the lever pivot pin.
Side‐Mounted Handwheel for Sizes 70 and 87 Actuators
A side‐mounted handwheel assembly (figure 17) is normally used as a manual actuator for sizes 70 and 87 actuators.
Turning the handwheel counter‐clockwise past the neutral position opens the valve body. A pair of sleeves (keys 34
and 46, figure 17) operates the valve by moving the valve stem.
Instructions are given below for complete disassembly and assembly. Perform the disassembly only as far as necessary
to accomplish the required maintenance; and then begin the assembly at the appropriate step.
Key numbers refer to figures 8 or 10, and 13.
Disassembly for Side‐Mounted Handwheel (Size 70 and 87)
1. Bypass the control valve, reduce loading pressure to atmospheric, and remove the tubing or piping from the upper
diaphragm casing (key 1).
2. Remove cover band (key 60), and relieve spring compression by turning the spring adjuster (key 12)
counter‐clockwise.
3. Remove the cap screws and casing screws and nuts (keys 22 and 23), lift off the upper diaphragm casing (key 1),
and remove the diaphragm (key 2).
4. Remove the cap screw (key 3) and the washer (key 25), then take off the diaphragm plate (key 4).
5. Remove the actuator spring (key 6), the upper sleeve (key 34), and the spring seat (key 11) from the yoke cylinder.
This exposes the needle bearing and races (keys 37 and 38).
6. Separate the halves of the stem connector assembly (key 26) by removing the two cap screws. Remove the
actuator stem (key 10).
7. Remove the travel indicator (key 14).
CAUTION
To avoid possible product damage, do not move the neutral indicator scale after completing the following step.
657 Actuator (30/30i-70/70i and 87)
June 2018
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