Check for Faulty Solenoids

Faulty solenoids prevent the milk meters from functioning properly. Before replacing a solenoid, run through the following checks to verify the solenoid needs replacing, or to determine if a different problem exists.

To determine if the solenoid needs replacing

1. Set the MPC Control Box to wash mode, press.

2. In the milk meter body, confirm the valve rises and falls at 10-second intervals.

3. Detach the vacuum line from its port on the solenoid, and cover the pipe end with your finger to test the presence of the vacuum suction.

4. In the milking point Connection Box, remove the solenoid wires (red and black) and check their resistance using a multimeter.

5. On the milk meter, unclip the bottom clasp, remove the milk meter bottom cover, and confirm the diaphragm is not worn.

6. If these checks did not reveal any issues, remove the old solenoid and replace it with a new one.

7. Reassemble the milk meter, clip the bottom clasp into place, and attach the vacuum and exhaust lines to their ports on the solenoid.