Replacing Monovalve Insert

Replacing Monovalve Insert
With Ondular Spring:

1. Open radiator cap, release pressure and close cap.
2. Disconnect electrical coupling on monovalve.






3. Unscrew 4 screws (arrows) on top of monovalve and pull valve insert up and out






4. Pull valve insert down and out of the coil.
5. Push both plates and new ondular spring onto new valve insert, then push valve insert into coil.






6. Engage wide recess (arrow) in sleeve (3) with bottom of electrical connection. Then wind insulating tape (a) around top end of valve insert.

Note: The insulating tape ensures that the recess in the sleeve remains engaged when the valve insert is inserted into the housing. This is important to guard against leaks.

7. Introduce valve insert(s) into housing and fasten with the screws. Then remove insulating tape.






8. Remove housing of coupling (item 54), bend sleeves and clean off oxidation if necessary. Then plug coupling onto valve.
9. Reconnect hose for heat exchanger if fitted.
10. Pressurize cooling system and test for leaks.
11. Check function of heating system.