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HWH hydraulic leveling pump

July 14, 2015, 02:29:34 pm

Our 1989 HWH leveling pump runs, and runs, and runs (you get the idea?) when I try to level the coach. The driver's rear jack doesn't even extend.
Is it possible to find parts and rebuild the pump myself?

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Re: HWH hydraulic leveling pump

Reply #1 – July 14, 2015, 06:51:20 pm

A silly question, but have you checked the fluid level and also do any of the other jacks work?

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Re: HWH hydraulic leveling pump

Reply #2 – July 15, 2015, 09:01:51 am

Yup, fluid level is up & was checked last fall when the problem started really getting bad by manifesting itself. All jacks would swing down and extend until touching the ground. Then only the front jacks would do any leveling( not a lot, but I could sense movement) and the passenger rear would move the coach a "hair". The driver's rear only just touched the ground.

There are no leaks anywhere. I cleaned the sensor on each jack and checked the electrical connections up front. The electrical contact up front/down under/ second from the pass side looks like some liquid spilled on it, bit is tight.
I remove the driver's side grill (4 screws) to access the tank reservoir and clean all around the fill area before removing the breather cap. Fluid level is within spec--1" below top.
First time I checked three years ago I missed the part in the instructions about jacks up & within 1" of full. This dumbass then proceeded to fill the tank. (sometimes I am my own worst enemy!! )
The pump continuing to run for a long time after actuation and then stopping without proper leveling has been steadily increasing and gotten worse over time.

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Re: HWH hydraulic leveling pump

Reply #3 – July 15, 2015, 12:52:45 pm

nitehawk,
Have you checked your bleeder valves that relieve pressure in case you are stuck without power? Our 240 had these valves, one for each jack and we had one fail causing similar problems.  Seems like there was some O rings that we had to replace also along with the stem.

Pamela & Mike

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Re: HWH hydraulic leveling pump

Reply #4 – July 15, 2015, 03:20:22 pm

Thanks, don't know if there is any bleeder valves.

I do have an email into HWH service dept but I think I may be taking a dirt nap by the time they answer my email  

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