Spring (Valve Discs) - Autotrol Logix 740 Operation Manual

Spring (Valve Discs)

Valve Discs
Push open
Spring locked under tabs
VALVE SERVICE
NOTE:
The cam for this switch is adjustable. To have the microswitch activate
at a different point in the cycle, rotate the cam as needed. To rotate the cam
loosen the center screw, tighten when the cam is in the new position.
This spring is a one-piece metal spring that applies pressure to the valve
discs holding them closed. The rotating camshaft overcomes this pressure
to open the valve discs as needed. The shape of the spring is critical for
proper operation.
WARNING: Do not attempt to straighten or repair this spring. If this
spring is damaged, valve discs may not operate correctly.
To remove spring:
1. Disconnect power to the unit.
2. Remove cover.
3. Remove motor.
4. Remove camshaft.
5. Place unit in bypass.
6. Release water pressure by pushing the last valve discs open with a
screw driver.
7. Locate valve discs 2, 3 and 4 for 255 valve or valve discs 3, 4 and 5 for
Performa valves.
8. Position yourself on the spring side of the valve discs.
9. Place two (or more) fingers on the flat part of the spring.
10. Move the fingers toward the valve discs and into the spring valley
between the previously located valve discs.
11. By pulling back and up on the spring, the spring will pop out of the
valley.
12. Pull back further to remove the spring.
53
Rev A