Emerson Process Management FISHER 657 - Manual (Page 15)

Instruction Manual
D100306X012
657 Actuator (30-70 and 87)
December 2010
15
Assembly for Side‐Mounted Handwheel (Size 34‐60)
1. Pack the ball bearings (key 152) with anti‐seize lubricant (key 244). Insert one bearing and the bushing (key 151)
into the handwheel body (key 142) as shown in figure 11 or 12. The bushing is not used in a handwheel assembly
for sizes 45 through 60 actuators.
2. Coat the handwheel screw assembly (key 145) threads with anti‐seize lubricant (key 244), and thread the operating
nut (key 132) onto the screw. Slide the second ball bearing (key 152) onto the screw, and insert the end of the
screw into either the bushing (key 151), as shown in figure 11, or into the bearing.
3. Thread the bearing retainer (key 136) into the body (key 142). Completely tighten the bearing retainer, and then
loosen it one‐quarter turn. Tighten the set screw (key 168, not shown) to hold the bearing retainer in place.
4. Coat the groove in the handwheel body (key 142) with lithium grease (key 241). Insert the spring (key 56) and ball
(key 55) into the handwheel (key 51). Holding the ball and spring in the handwheel, put the handwheel, the washer
(key 149), the lockwasher (key 150), and the stop nut (key 54) onto the end of the handwheel screw (key 145).
Tighten the stop nut.
5. Position the pointer mounting bolt (key 159, not shown) and pointer (key 160) as shown in figure 11 or 12. Insert
and tighten the screw (key 161).
6. Assemble the two levers (key 146) with the cap screws (key 156) for handwheel assemblies for sizes 45, 50, and 60
actuators, or with the machine screws (key 156) for handwheel assemblies on sizes 34 and 40 actuators.
7. If the handwheel assembly was removed from the yoke (key 9, figures 6, 7, or 8), remount the handjack assembly
to the yoke using the dowel pins for alignment. Position the U‐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. Cap screws (key 163)
should be tight against the yoke legs to provide stability. Tighten nuts (key 144). Finish tightening the U‐bolt nuts
to 163 N
Sm [120 lbfSft] (key 170) and 41 NSm [30 lbfSft] (key 147). Be sure the handwheel assembly remains flat
against the mounting pad and perpendicular to the yoke.
8. Position the levers (key 146) as shown in figure 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 13) 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 13) 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 7 or 8, and 11.
Disassembly for Side‐Mounted Handwheel (Size 70 & 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).