Does anyone know how the Dewald hyraulic slide/jack pump is built?
Mine crapped out while extending the jacks. The electric pump spins, but does not pump. The jacks were not yet to the ground, so there was very little pressure on the motor.
I was able to manually pump them back up.
It has clean looking fluid that is about 1" below the top of the big square tank. And besides, it crapped out suddenly, and now that it is back up, it still won't pump.
I don't see how I have a bad solenoid(s), because the pump spins as if there is no load, and it will not move the slide or the jacks in either direction. To manually pump, I rotate the solenoids to the "up" setting, and also turn this knurled knob that's on the hand pump portion. I am assuming that the knurled knob prevents my pumping from spinning the electric pump, and that the solenoids are either in the "up" or "down" position. All of this leads me to conclude there is nothing wrong with electrics or solenoids
I am in the Idaho wilderness, so I cannot take this apart and risk having no fluid holding up the jacks. I want to know what is broken so I can buy the right part.
The other headache is that gulfstream in their infinite wisdom made the front access door smaller than required to get at the unit. I had to unbolt the thing to be able to manually pump it. The hoses are making it very difficult to pull it out with hydraulics intact so that I can look at the motor portion.
The manual is here
, but it does not have detail with respect to the motor.
Is there a key on the motor shaft?
Is the motor removable from the pump without spilling fluid?
I am totally failing to find replacement parts for this. The manual has the part number for the motor/pump assembly (OK21500S), but google gives me nothing that looks close, except for a used part from visionerv.com
. I am all in favor of a used part, but would like to know what failed.
My understanding is that Dewald was bought and bought again and lippert might be the owner now.
Another thread leads me to believe that my motor might be like
. This does not have a shaft with a key.
The part manual seems to indicate that the pump is not sold separately from the motor. I find that it is not sold at all. When these go bad, is there some tank, solenoid, pump, motor all-in-one replacement?
Do these slides and jacks wear out over time such that it is probably better to do a whole system swap? My jacks do pop sometimes dropping a bit each time, so the system doesn't hold fluid perfectly. They also drop over the course of a few weeks when in the retracted position. Is that normal for a good unit, or am I seeing age in the jacks and solenoids?