Range Spring, Diaphragm Assembly Ball Seat, Tubing, And Ball - Emerson Fisher 4194HA Instruction Manual

Instruction Manual
D200156X012
3. Position the closing plate gasket (key 306) and the closing plate (key 307). Secure with two screws (key 308).
4. Place the balls (key 296), switch body springs (key 295), and O‐rings (keys 292, 293, and 294) in the switch body
(key 291).
Note
In the following step, the ends of the springs must be in the counterbored spring seats before compression.
5. Compress the switch body springs with the loader assembly (key 282) and bolt the switch (key 291) to the loader
assembly using the two screws (key 290).
6. Reconnect the tubing assembly (key 309).
7. Locate the lever spring (key 302) and the spring seat (key 301) on the switch lever (key 304) and position these
parts in the opening of the loader assembly (key 282).
8. Push the switch lever down, using the lever spring seat (key 301) and the lever assembly (key 297) to preload the
spring. Make sure the notch of the switch lever engages the pin of the lever assembly.
9. Drive in the groove pin (key 303) to hold the switch lever.
10. Replace the lever cover plate (key 305) and attach with two screws (key 288).
11. Perform the assembly portion of the replacing the auto/manual station procedure.
Replacing the Auto/Manual Station Switch Range Spring, Diaphragm Assembly, Ball Seat,
Tubing, and Ball
Refer to figure 6‐5 for key number location.
Disassembly
1. Remove the auto/manual station from the controller frame as described in steps 1 through 4 of the procedure for
replacing the auto/manual station.
2. Remove tubing assembly (key 309).
WARNING
To avoid personal injury caused by preload from the range spring (key 282), turn the loader knob (key 287)
counterclockwise (opposite to the arrow) to relieve pressure on the spring.
3. Loosen the four screws (key 289) and separate the loader assembly (key 282) and the lower loader assembly
(key 274).
4. Remove the loader range spring (key 283), range spring cup (key 284), and diaphragm assembly (key 281).
5. Remove the tube (key 278), ball seats (key 280), and ball (key 279).
Assembly
1. Turn the loader knob (key 287) counterclockwise to back the spring adjusting screw (key 285) all the way out to
eliminate loading the range spring.
2. Position the range spring cup (key 284), the range spring (key 283), and the diaphragm assembly (key 281) on the
loader assembly (key 282).
4194HA, HB, HC Controllers
July 2018
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