Emerson Fisher 657 Instruction Manual page 16

657 Actuator (30/30i-70/70i and 87)
June 2018
Disassembly for Side-Mounted Handwheel (Sizes 34-60 and 34i-60i)
1. 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 desired, the handwheel assembly can be removed from the actuator yoke. To do this,
remove the hex nuts (keys 147 and 170) from the U-bolts (key 166 and 143) that hold the assembly to the yoke
for the size 30 and size 40. Remove the hex nuts (key 144 and 170) from the U-bolts (key 166 and 143) that hold
the assembly to the yoke for the size 45 through size 60.
b. For Size 34i through 60i: If desired, the handwheel assembly can be removed from the actuator yoke. To do this,
remove the cap screws (key 256 and 257) and spacers (key 258) that hold the assembly to the yoke for the size
30i through size 60i.
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 stop nut (key 54), lockwasher (key 150), and washer (key 149). Then remove the handwheel (key 51),
being careful not to lose the small ball (key 55) and spring (key 56).
6. Loosen the locking set screw (key 168, figure 16). Then, using a suitable tool, unscrew the bearing retainer (key
136).
7. Pull the handwheel screw assembly (key 145) out of the handwheel body. The operating nut (key 132) will come
out with the screw. Also remove the bushing (key 151, figure 13 or 14) on size 34 and 40.
8. If required, remove the two ball bearings (key 152), one from the bearing retainer and the other from the
handwheel body.
Assembly for Side-Mounted Handwheel (Sizes 34-60 and 34i-60i)
Click here or access the following QR code for a video on installing a side-mounted handwheel
on a 657 actuator.
1. Pack the ball bearings (key 152) with anti-seize lubricant (key 244). Insert one bearing and the bushing (key 151,
figure 13 or 14) into the handwheel body (key 142). The bushing is not used in a handwheel assembly for sizes
45/45i through 60/60i actuators.
2. Coat the handwheel screw assembly (key 145) threads with anti-seize lubricant (key244), 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, figure 13 or 14) for sizes 34/34i and 40/40i, or into the bearing for sizes
45/45i through 60/60i.
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, figure 13 or 14) 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 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). 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 45/45i, 50/50i,
and 60/60i actuators, or with the machine screws (key 156) for handwheel assemblies on sizes 34/34i and 40/40i
actuators.
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Instruction Manual
D100306X012