Emerson Fisher 667 Instruction Manual page 18

667 Actuator (Size 30/30i - 76/76i and 87)
June 2017
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. If necessary, screw the extension rod (key 150 into the connector (key 27). Slide the guide plate (key 157) onto the
extension rod (key 150). For size 45/45i through 76/76i, place the spacer (key 253) on top of the guide plate (key
157). If necessary, replace the extension rod (key 150). Slide the handwheel body (key 148) over the extension rod,
position the handwheel body on the spacer (key 253), align the holes, and insert and tighten the cap screws (key
161).
13. Lubricate and install the thrust bearings (keys 181 and 180), install the bearing retainer (key 182), install the castle
nut (key 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).
14. Refer to the Assembly portion of the Actuator maintenance section.
For size 70/70i and 87 actuators handwheels (figures 14 and 15):
Refer to figure 14 for top‐mounted handwheel assemblies and figure 15 for handjack bar assemblies.
1. If removed, slide the handwheel (key 58) onto the end of the handwheel screw (key 160), and snap the retaining
ring (key 60) into place.
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. If necessary, install the extension rod (key 150) into the connector (key 27) and tighten it. Position the handwheel
body (key 148) on the diaphragm casing (key 1, figures 6, 7, 8, 9, and 10), and align the holes. Insert the cap screws
(key 154). Finger tighten the screws.
4. If travel stops were used, return 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.
18
Instruction Manual
D100310X012