Autotrol Logix 740 Operation Manual page 49

VALVE SERVICE
To remove camshaft:
1. Disconnect power to the unit.
2. Remove cover.
3. Remove motor.
4. Camshaft should be in the treated water position. Rotate
counterclockwise as needed.
5. Use a screwdriver to hold open the #1 valve disc.
NOTE:
When replacing/removing camshaft, make sure not to damage or mis-
align the optical sensor. Hold the sensor in position while removing camshaft.
6. Move the camshaft backwards, away from the controller.
7. Lift the loose front end up and out.
To install camshaft:
1. Check that the optical sensor is in position.
2. Position camshaft above the valve discs. The arrow on the cup should
be up.
3. Slide the rear of the camshaft into place.
4. Pivot the camshaft close to its final position.
5. The camshaft will push on one or more valve discs. You will feel
resistance as you complete the installation.
6. Move the camshaft down and into position. Force valve discs to move
as needed.
7. Move the camshaft forward. Check that the optical sensor is in
position.
8. Install motor.
NOTE:
The camshaft will position itself to C0 (treated water) when the
controller is powered up.
49
Rev A