Size 80 Hydraulic Snubber; Size 100 Top-Mounted Handwheel - Emerson Fisher Type 667 size 80 Instruction Manuals

screw slot in the worm retainer with the set screw hole
in the gear case, insert the set screw, and tighten.
3. Coat the worm shaft (key 51) threads with Lubri-
plate MAG-1 or equivalent lubricant, and slide the
shaft into the gear case (key 41) so that the end of the
shaft fits snugly in the back worm retainer.
4. Insert the bearing in the front worm retainer (key
49), and thread the retainer and ball bearing into the
gear case. Align the set screw slot in the retainer with
the set screw hole in the gear case, insert set screw,
and tighten.
5. Put the spring and ball (keys 142 and 141) in the
handwheel (key 58). Slide the handwheel onto the
worm shaft (key 51). Thread the handwheel cap (key
127) onto the worm shaft.
6. Pack the two thrust bearings (key 43) with Lubri-
plate MAG-1 or equivalent lubricant. Install one thrust
bearing; then install the worm gear (key 44), followed
by the second thrust bearing and the bearing and gear
retainer (key 45).
7. The lower sleeve (key 123) has two screw holes in
one end. Coat the sleeve threads with Lubriplate
MAG-1 or equivalent lubricant, slide the end of the
lower sleeve with the holes into the thrust bearing (key
43), turn the handwheel, and feed the sleeve through
the worm gear. Continue turning the handwheel until
the lower sleeve protrudes from the gear case. Fasten
the travel stop indicator (key 126) to the sleeve with
two machine screws (key 79).
8. Install the key (key 122) on the retaining flange
(key 134).
9. Install the retaining flange (key 134) so that the key
engages the slot in the lower sleeve. Secure retaining
flange with cap screws (key 136).
10. Adjust set screws (key 121) to eliminate free play
in the bearings.
Type 667 Sizes 80 & 100
Overtightening the set screws will make
handwheel operation difficult.
11. Coat the spring adjustor (key 74) threads with Lu-
briplate MAG-1 lubricant and install it over lower
sleeve.
12. Pack the thrust bearing (key 86) with Lubriplate
MAG-1 or equivalent lubricant, and install it on spring
adjustor (key 74) as shown in figure 8.
13. Slide the spring case (key 85) into position, and
secure with cap screws (key 88).
14. Complete steps 3 through 16 of the Assembly
procedure in the Size 80 Actuator Maintenance sec-
tion.

Size 80 Hydraulic Snubber

The size 80 Type 667 is available with a hydraulic
snubber, as shown in figure 8, to aid vertical stability
of actuator stem movement. The snubber is adjusted
by rotating the adjusting screws (key 104, figure 8)
counterclockwise out of the reservoir (key 99, figure 8)
to increase damping action and clockwise to decrease
damping action. The adjusting screw on the right ( the
top one of the two adjusting screws in section B-B of
figure 8) regulates downward damping action, and the
screw on the left regulates upward damping action.

Size 100 Top-Mounted Handwheel

Key numbers are shown in figure 9.
A top-mounted handwheel assembly is normally used
as an adjustable-up travel stop to limit full retraction of
the actuator stem. Clockwise rotation of the hand-
wheel (key 58) moves the actuator stem (key 144)
downward. Counterclockwise rotation will compress
the spring and move the actuator stem upward.
Note
15