Assembly For Top-Mounted Handwheel - Fisher 667 Instruction Manual

D Remove the cap and take out the cotter pin. Re-
move 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 re-
quire 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 Never-Seez Nickel
Special (key 239) or equivalent.
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 through 60 and 76 actuator
handwheels (figures 9 and 11):
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 neces-
sary, unscrew the extension rod (key 150). Remove
the rod, the handwheel body (key 148), and the at-
tached parts.
D Remove the hex nuts and cap screws (keys 14
and 13, figures 6, 7, and 8) from the diaphragm cas-
ings. Lift off the upper diaphragm casing (key 1) and
the mounting plate (key 158).
D Turn the handwheel (key 58) to remove the hand-
wheel screw (key 160) from the handwheel body (key
148). Remove the retaining ring (key 60) if the hand-
wheel (key 58) must be separated from the handwheel
screw.
D If necessary, perform other actuator maintenance
before returning to the following assembly steps.
6. For size 70 and 87 actuator handwheels
(figure 12):
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.
Type 667 Size 30-76 & 87
D Remove the hex nuts and cap screws (keys 14
and 13, figures 6, 7, and 8) from the diaphragm cas-
ings. Lift off the upper diaphragm casing (key 1), hand-
wheel body (key 148) and attached parts.
D If travel stops (key 152) are used, note and re-
cord 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 12) or the handwheel body (key 148, figure
12) and attached parts.
D Turn the handwheel (key 58) to remove the hand-
wheel screw (key 160) from the handwheel body (key
148). Remove the retaining ring (key 60) if the hand-
wheel (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 through 60 and 76 actuator hand-
wheels:
Refer to figures 9 and 11 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 lubricant (key 239 or equivalent).
Turn the screw into the handwheel body (key 148).
3. Install the mounting plate (key 158) to the dia-
phragm casing (key 1, figures 6, 7, and 8) 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.
When you replace actuator diaphragms
in the field, take care to ensure the dia-
phragm 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 30-76 and 87 ac-
tuators.
Note
11