lenp Posted January 9, 2016 Report Share Posted January 9, 2016 When pulling and repairing my hot water tank earlier in the week I discovered my HWH leveling system (610) no longer functioned. the pump would not run at all when trying to raise the coach. I had been having some intermittent problems on our trip down here to Louisiana (from Oregon) but had always managed to get them to work. The troubleshooting guides HWH provides were EXTREMELY helpful in identifying the "pump relay" as being the problem. Ordered a new one but also found one "close enough" for temporary repair. All is good now. Now for the NEXT problem...... The owner of the campground we are staying at observed me repairing mine and asked if I would have a look at his. He has a 95 Allegro Bus with the 200 series HWH levelers. Problem with his was the pump starts to run as soon as you turn on the leveling system. It is not supposed to run until you move the joystick. Troubleshooting guide from HWH isolated the problem to the "valve assembly". Closer inspection of this valve assembly reveals it is a set of eight valves (2 for each jack) and a "switch" that applies a ground to one side of the pump relay when the joystick is activated. This switch is the problem. This switch is made up of a rectangular plate with a round hole in the center. The plate is isolated from ground via nylon standoffs and when the joystick is moved left, right, up or down a section of the joystick makes contact with the plate. The joystick is at ground potential (via a separate ground wire and chassis contact) and applies a ground to the "switch" plate and therefore, one side of the pump relay. Appears the problem is the plate mounting screws have been (I think) over tightened resulting in the nylon standoffs being compressed to the point the plate is making contact with one or more of the hydraulic valves below it resulting in ground being applied to the plate all the time and, thus, the motor running. HWH troubleshooting instructions say to replace the valve assembly. Not sure how much that would cost but I am sure it won't be cheap! Looking at how it is built I believe we can repair the existing switch assembly by either (1) adding a small spacer under the existing nylon standoffs to clear the valves or (2) replace the nylon standoffs (if we can find them) or (3) insert some insulating material (inner tube???) between the plate and the valves. Inner tube probably would not last very long though. Anyone else out there ran into this problem and have a solution? Appreciate any suggestions. Lenp Link to comment Share on other sites More sharing options...
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