06-22-2012, 03:40 PM
I had a similar problem. I ordered a new spring and in the process of replacing it discovered the real problem. The blue plunger that clamps the hose shut is threaded. The wire that connects to the plunger is threaded AND adjustable. When my plunger was "mashing" the hose in the off position the wire was very taught. There was no play in the solution lever. By screwing the wire out to make it longer allowed it to completely close the hose. My solution lever now has some play in it when closed indicating the plunger is completely closed. Basically the plunger would not mash the hose flat because the assembly is not long enough. The fuller the tank the faster it ran out. Make the wire a little longer by unscrewing it around 1/8" allows everything to work correctly. I fought this problem for 2 years and once corrected the flow to the pads is under my control not gravity and load of solution in the tank. If you have no slack in your solution lever i'll bet this will fix your problem.