Emerson Process Management 667 - Manual (Page 22)

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
22
5. Remove the retaining ring (key 60), and remove the handwheel.
6. Remove front and back worm retainers (keys 48 and 49) and the bearings (key 50).
7. Remove the worm shaft (key 51).
8. Remove the power screw assembly (key 46) by placing a wrench on the double hex nuts (key 47) and unscrew the
assembly from the actuator stem extension (key 36). The bearing and gear retainer, thrust bearing, and worm gear
(keys 45, 43, and 44) will come out with the power screw.
Assembly
1. The front and back worm retainers (keys 48 and 49) each have a slot in their threads for a set screw (key 52). Pack
the ball bearings (key 50) with lithium grease, and insert one ball bearing into the back worm retainer (key 48).
2. Thread the back worm retainer and ball bearing into the gear case. Align the slot in the worm retainer with the set
screw hole in the gear case, insert the set screw (key 52), and tighten.
3. Coat the worm shaft (key 51) threads with lithium grease lubricant, and slide the shaft into the gear case so that the
end of the shaft fits snugly in the back worm retainer.
4. Insert the bearing into the front worm retainer (key 49), and thread the retainer and ball bearing into the gear case.
Align the slot in the retainer with the hole in the gear case, insert the set screw (key 52), and tighten.
5. Slide the handwheel onto the worm shaft (key 51), and install the retaining ring (key 60).
6. Pack the two thrust bearings (key 43) with lithium grease lubricant. Install one thrust bearing, then the worm gear
(key 44), followed by the second thrust bearing and the bearing and gear retainer (key 45).
7. Coat the power screw threads (key 46) with lithium grease lubricant. Slide the power screw into the thrust bearing
(key 43), turn the handwheel, and feed the sleeve through the worm gear.
8. Install the gear case cover (key 53), and tighten the cap screws (key 54).
9. Adjust the set screws (key 55) to eliminate free play in the bearings.
Note
Overtightening the set screws (key 55) will make handwheel operation difficult.
Parts Ordering
Each actuator has a serial number stamped on the nameplate. Always refer to this number when corresponding with
your Emerson Process Management sales office regarding replacement parts or technical information. Also, always
refer to the 11‐character part number of each recommended spare part, as found in the following parts list.
WARNING
Use only genuine Fisher replacement parts. Components that are not supplied by Emerson Process Management should
not, under any circumstances, be used in any Fisher valve, because they may void your warranty, might adversely affect the
performance of the valve, and could cause personal injury and property damage.
Note
Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use, or
maintenance of any product. Responsibility for the selection, use, and maintenance of any product remains with the purchaser and
end user.