Tom’s Way – How to Service, Clean, and Rebuild a Hydrominder

Kleen-Rite and its customers were lucky to have Tom Allen teach us about car wash operations for many years before his passing. This is a re-post of one of his more popular tutorials where he explained how to service a Hydrominder. You will need a 1/4″ nut driver or a #6 flat head screwdriver.

Step-By-Step Hydrominder Instructions with Pictures

turning water off at inlet

Step 1. Turn water valve off at hydrominder inlet.

removing hex nut on hydrominder

Step 2. Remove hex nut on top of magnet cap with flat head screwdriver or nut driver.

pulling magnet cap off hydrominder

Step 3. Lift off magnet cap.

removing magnet yoke from hydrominder

Step 4. Hold down on magnet and remove magnet yoke.

removing magnet and magnet spring from hydrominder

Step 5. Remove magnet and magnet spring.

removing discharge and pickup tubes

Step 6. Remove discharge and pickup tubes.

remove screws that hold the valve body to bracket

Step 7. With 1/4″ nut driver, remove the 3 screws that hold valve body to bracket.

removing plunger assembly and stem from the valve body

Step 8. Removed plunger assembly and stem from valve body.

remove diaphragm from valve body to examine and clean.

Step 9. Remove diaphragm from valve body. Inspect, clean, or replace diaphragm.

inspect and clean or replace plunger and spring assembly.

Step 10. Inspect, clean, and/or replace plunger and spring assembly.

replace spring and plunger back into stem of the hydrominder.

Step 11. Replace spring and plunger back into stem.

put diaphragm on top of stem assembly of hydrominder.

Step 12. Put diaphragm on top of stem assembly.

instert stem assembly into hydrominder.

Step 13. Insert stem assembly back up through bracket and then bring valve body back up to stem assembly and place together being careful that the diaphragm and plunger assembly doesn’t pop out or get lost.

re-tighten 3 screws on hydrominder.

Step 14. Re-tighten the 3 screws that hold bracket and valve body together.

reinstall spring and magnet back on hydrominder stem.

Step 15. Reinstall spring and magnet back onto stem.

reinstall magnet yoke and magnet cap on hydrominder.

Step 16. Reinstall magnet yoke and replace the magnet cap.

screwing magnet cap back on hydrominder.

Step 17. Screw the magnet cap back on.

remove colored tip and suction stub on hydrominder.

Step 18. Remove colored tip and suction stub.

inspect and clean or replace the colored tip and suction stub on hydrominder.

Step 19. Inspect, clean, or replace the colored tip and suction stub.

reinstall pickup and discharge tubes on hydrominder.

Step 20. Reinstall pickup and discharge tubes.

turn hydrominder water valve back on.

Step 21. Turn water valve back on.

pulling down on magnet yoke to test water draw and chemical draw on hydrominder.

Step 22. Manually pull down on magnet yoke to test water and chemical draw, and then let go again. If the magnet clicks, it is in the ON position. It is now ready to go!

Watch the Process on Video

If the pictures above aren’t quite enough to help you fully understand what’s happening at each step, give the full video a watch. Tom completely explains and demonstrates the process.

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