Instruction Manual

Instruction Manual

D200158X012

4194S Controllers

December 2011

5. Compress the switch body springs with the loader assembly (key 282), and bolt the switch (key 291) to the loader

assembly with 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 Loader Range Spring, Diaphragm Assembly, Ball Seat, Tubing, and Ball

Refer to figure 5‐5 for key number location.

Disassembly

1. Perform steps 1 through 3 of the replacing case and cover procedure.

2. Remove the auto/manual station from the controller as described in steps 1 through 4 of the Replacing the

Auto/Manual Station procedure.

3. Remove the 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.

4. Loosen the four screws (key 289), and separate the upper loader assembly (key 282) and the lower loader assembly

(key 274).

5. Remove the loader range spring (key 283), range spring cup (key 284), and diaphragm assembly (key 281).

6. 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 adjustment screw (key 285) all the way out to

eliminate loading the range spring.

2. Position the range spring cup (key 284), range spring (key 283), and the diaphragm assembly (key 281) on the

upper loader assembly (key 282).

3. Position the ball (key 279), the tube (key 278), and the ball seats (key 280) between the ears of the loader

assemblies (keys 282 and 274); position the diaphragm assembly (key 281) between the main halves of the loader

assemblies.

Note

The tube (key 278) must be well seated in the cups of the ball seats (key 280).