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Instruction Manual
D100310X012
6. For size 70/70i and 87 actuator handwheels (figures 14 and 15):
D Remove the cap (key 247). Take out the cotter pin (key 167) and remove the castle nut, the bearing retainer, and
thrust bearing (keys 166, 182, 181, and 180). It is not necessary to remove the extension rod (key 150) at this time.
D Remove the hex nuts and cap screws (keys 14 and 13, figures 6, 7, 8, 9, and 10) from the diaphragm casings. Lift off
the upper diaphragm casing (key 1), handwheel body (key 148) and attached parts.
D If travel stops (key 152) are used, note and record their position relative to the cap screws (key 154) for use in
assembly. Remove the travel stops and cap screws, and remove either the mounting plate (key 158, figure 14) or
the handwheel body (key 148, figure 14) and attached parts.
D Turn the handwheel (key 58) to remove the handwheel screw (key 160) from the handwheel body (key 148).
Remove the retaining ring (key 60) if the handwheel (key 58) must be separated from the handwheel screw.
D If necessary, perform other actuator maintenance before returning to the following assembly steps.
Assembly for Top‐Mounted Handwheel
For size 30/30i through 60/60i and 76/76i actuator handwheels:
Refer to figures 11, 12, and 13 for top‐mounted handwheel assemblies.
1. If it was removed, slide the handwheel (key 58) onto the end of the handwheel screw (key 160), and snap the
retaining ring (key 60) into place. Also, install the guide post (key 150) if it was removed.
2. Generously coat the threads of the handwheel screw (key 160) with anti‐seize lubricant (key 239). Turn the screw
into the handwheel body (key 148).
3. Install the mounting plate (key 158) to the diaphragm casing (key 1, figures 6, 8, 9, and 10) with the cap screws (key
154). Finger tighten the screws.
4. If travel stops were used, install the travel stops to their original positions as recorded in the proceeding
Disassembly steps. Tighten the screws and travel stops.
Note
When you replace actuator diaphragms in the field, take care to ensure the diaphragm casing bolts are tightened to the proper
load to prevent leakage, but not crush the material. Perform the following tightening sequence with a manual torque wrench for
size 30/30i‐76/76i and 87 actuators.
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. Position the diaphragm casing (key 1, figures 6, 7, 8, 9, and 10), mounting plate (key 158), travel stops (key 152), if
used, and cap screws (key 154) on the diaphragm. Install the cap screws and hex nuts (keys 13 and 14, figures 6, 7,
8, 9, and 10) and tighten in the following manner.
667 Actuator (Size 30/30i - 76/76i and 87)
June 2017
17
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