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667 Actuator (Size 30/30i - 76/76i and 87)
June 2017
A top‐mounted handwheel assembly (figures 11, 12, 13, 14, and 15) is usually used as an adjustable down travel stop
to limit full extension of the actuator stem. Turning the handwheel counterclockwise pulls the extension rod (key 150,
figures 11, 13, and 14) up, retracting the actuator stem.
Instructions are given below for complete disassembly and assembly. Perform the disassembly only as far as necessary
to accomplish the required maintenance; then, begin the assembly at the appropriate step.
Note
For size 70/70i and 87 actuators with handjack bars (figure 15) it is recommended that the handjack bar (key 58) be removed
when not in use and the handwheel cap (key 247) be installed for weather protection of the internal components.
Disassembly for Top‐Mounted Handwheel
1. Bypass the control valve, reduce loading pressure to atmospheric, and if equipped, remove the tubing or piping
from the connection in the top of the yoke (key 73, figures 6, 8, 9, and 10).
2. Turn the handwheel (key 58) clockwise so that the handwheel assembly is not causing any spring compression.
3. Turn the actuator spring adjuster (key 74) to relieve all the compression from the spring (key 18).
4. If servicing just the thrust bearing, races, and handwheel screw (keys 180, 181, and 160), use the following steps:
D Remove the cap and take out the cotter pin. Remove the castle nut, bearing retainer, thrust bearing, and races (keys
247, 167, 166, 180, and 181).
D Use the handwheel to remove the handwheel screw (key 160) from the handwheel body (key 148).
D If necessary, remove the extension rod (key 150) at this time. Most maintenance procedures do not require the rod
to be removed.
D Clean and inspect all parts or replace parts as necessary. Upon re‐assembly, lubricate handwheel threads, bearings,
and races with anti‐seize lubricant (key 239).
D Lubricate and re‐install the handwheel screw into handwheel body (key 148). Lubricate and replace the races,
bearing, and retainer (keys 181, 180, and 182). Replace the castle nut (key 166), tighten it, and insert the cotter pin
(key 167). Replace the handwheel cap (key 247).
5. For size 30/30i through 60/60i and 76/76i actuator handwheels (figures 11 and 13):
D Remove the cap screws (key 161). Make sure that the guide plate can turn between the handwheel body and the
mounting plate (keys 157, 148 and 158).
D Remove the cap (key 247) and cotter pin (key 167). Remove the castle nut (key 166) and, if necessary, unscrew the
extension rod (key 150). Remove the rod, the handwheel body (key 148), and the attached parts.
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) and the mounting plate (key 158).
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.
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Instruction Manual
D100310X012
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