Replacing The Switch Body Assembly; Lever O-Ring, Switch Body O-Ring - Emerson Fisher KC Series Instruction Manual

4195KA, KB, KC, and KS Controllers
CAUTION
In the next step, take care to tighten
the two screws (keys 314 and 315)
evenly. Uneven tightening could
damage the tubing assembly.
3. Position the auto/manual station as far down on
the frame and toward the scale as possible.
Carefully tighten the two screws (keys 314 and 315)
so that the auto/manual station contacts the three
pads on the tubing assembly.
4. Carefully tighten the remaining screws and nuts.
5. Plug the controller output connection and apply
supply pressure to the controller. Check for leaks.
6. Position the controller assembly in the case and
start, but do not tighten the nine mounting screws.
Slide the controller assembly down to assure an
O-ring seal at the pressure connections along the
bottom of the case. Hold the controller assembly in
place while tightening the nine mounting screws.
7. Perform the appropriate calibration procedure in
Section 3, 4, or 5.

Replacing the Switch Body Assembly,

Lever O-Ring, Switch Body O-Ring, and
Tubing Assembly
WARNING
Refer to the Maintenance WARNING
on page 6-1.
Refer to figure 7-7 for key number location.
Disassembly
1. Remove the auto/manual station from the
controller as described in steps 1 through 4 of the
replacing the auto/manual station procedure.
2. Loosen the two screws (key 288) and remove the
lever cover plate (key 305).
WARNING
The lever spring (key 302) is under
preload. To avoid personal injury or
losing parts, carefully disassemble the
auto/manual station.
6-42
3. Using a 1/16-inch (1.5 mm) punch, push the
groove pin (key 303) out toward the surface of the
lever cover plate.
4. Remove the switch lever (key 304), lever spring
(key 302), and lever spring seat (key 301).
5. Remove the tubing assembly (key 309).
WARNING
The switch body springs (key 295) are
under preload. To avoid personal
injury or losing parts, carefully
separate the switch body assembly
from the loader assembly.
6. Loosen the two screws (key 290) and separate
the switch body assembly (key 291) from the loader
assembly (key 282).
7. Remove the O-rings (keys 292, 293, and 294),
switch body springs (key 295), and balls (key 296).
8. Loosen two screws (key 308), and remove the
closing plate (key 307) and the closing plate gasket
(key 306).
9. Pull the clip (key 300) from its engagement with
the lever assembly shaft (key 297).
10. Pull the lever assembly from the switch body
assembly (key 291) and rocker (key 299).
11. Remove the O-ring (key 298).
12. Inspect the O-rings and gaskets for damage or
wear; replace if necessary.
Assembly
1. Insert the lever assembly (key 297) into the
switch body assembly (key 291) and hold the rocker
(key 299) with the flats on the lever assembly shaft.
2. Insert the clip (key 300) in the groove of the lever
assembly shaft to hold the lever assembly (key 297)
in the switch body assembly (key 291).
3. Position the closing plate gasket (key 306) and
the closing plate (key 307). Secure with two screws
(key 308).
After assembly in step 3, be sure the
side of the closing plate marked OUT
is visible.
4. Place the balls (key 296), switch body springs
(key 295), and O-rings (keys 292, 293, and 294) in
the switch body assembly (key 291).
Instruction Manual
Form 5207
April 2007
Note