HWH motor runs, but no pressure
My Chariot coach has Series 625 HWH hydraulic levelers and 3~slides. They've worked flawlessly for 7 years, but all of a sudden nothing extends and I only hear the motor running (free spinning) when I...
Forum Discussion
1971duster340 wrote:
I have talked to HWH, but the system is beyond me other than those simple tests. Foretravel is close and they are a HWH Master Service Center. I'm going to turn it over to them, but I've heard (not from HWH) the entire ass'y has to be replaced. I am looking for some ammo if just the pump can be replaced.
HWH uses a motor. On the end of the motor is a rectangular shaft drive pin that spins the manifold system pump. IF you remove the u shaped metal tube that is connected to the shuttle valve and run the pump, if NO fluid comes out (will be 3000 psi), then the odds are that shaft is broken. I do not know if HWH sells just that shaft or you have to buy the motor(which includes that shaft key). If you remove the motor, it will be evident if that shaft key is broken or the spring is bad that puts pressure on that shaft key to engage it. Doug
The motor is sold separately. But, it depends on the brand/model motor. Some have been discontinued, even on a 7 year old motorhome. It was a vendor supply problem. Some older systems the motor cannot be purchased and you have to buy the Motor/Reservoir system. You transfer all the upper manifolds to the new pump/reservoir. Doug
This link shows what the part looks like.
http://www.hwhcorp.com/mr303311.pdf
this link is for the Motor/Pump assblies.
http://www.hwhcorp.com/mr30.html
