2

42-686 Series K Pneumatic Switch Mechanism

3.0

Reversing Pilot Action

All Series K Pneumatic Switch Mechanisms are shipped

from the factory in the direct (close) position at high level.

They can be field modified for the reverse (open) position

by following the steps below:

1. The action can be reversed by first removing the upper

shoulder screw from the actuator link and moving it from

the direct (D) position to the reverse (R); refer to Figure 3.

2. Loosen the screw that positions the spring bracket and

move it from the direct (D) position to the reverse (R) posi-

tion; refer to Figure 4.

3. Fasten screw securely.

The switch is now setup for reverse action.

4.0

Locating Air Line Connection

Caution: Instrument is designed for dry air/gas service.

The housing base may be rotated a full 360° for your con-

venience in connecting the air supply.

1. Loosen both the special locking screw above the enclosing

tube nut and the frame screw. Refer to Figure 3.

2. Rotate the entire base to the desired position.

3. Tighten both the locking screw and the frame screw.

4.0.1 Remove complete mechanism

1. Disconnect air line from air line adapter.

2. Loosen both the special locking screw, above the enclosing

tube nut, and the frame screw approximately 3 to 4 turns.

Refer to Figure 3.

3. Lift the entire base straight up and off the enclosing tube.

Figure 4

Fall-out spring

1

connection

1

inlet connection

Enclosing tube

Reverse position

Upper shoulder

screw

Direct position

Direct

position

Spring

bracket

Reverse

position

Figure 3

Fall-out stop

Magnet Tab

Housing

base

Enclosing tube

Frame screw

Enclosing

tube nut

Locking screw

Actuator

link