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Old 04-06-2014, 08:56 PM   #1
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HWH Series 100 ????

Anyone on here have a coach with the first gen series 100 leveling system from HWH? They do not offer a service or op manual through HWH any longer and I need some trouble shooting advice.
I had the valve body sent off to HWH a few years back because one leveler was leaking down. After a $68 repair, it worked great for a few years with no issues. Then we skipped a season with it, and when we brought it out of storage, the front left jack wouldn't extend. Made do for the trip, then again removed and shipped the valve body off to HWH for bench test. They sent it back with a no repair necessary.
Put it back on and not a single jack would extend. After extensive bleeding, which the system shouldn't need, I was able to get the rear jacks to extend, but weakly. No matter what I've tried, I cannot get the front to extend.
My jacks fold, and have the kick down feature. Neither of the front units will kick vertical, so neither will extend.
I'm getting fluid exiting the valve body, and I'm getting fluid to the jack inlets. I have no way of testing pressure.

Mounted on a 1989 Holiday Ramble Imperial.

Any advice?

Tim
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Old 04-07-2014, 03:44 AM   #2
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Quote:
Originally Posted by RamblinOn
...now none would extend. After extensive bleeding (shouldn't need that) I finally got the rear pair to extend, although a little weak. The front will not extend at all, nor unfold.
Quote:
Originally Posted by 94-Newmar
Reach under and manually pull down the kick-down portion (the foot) of the jack. At the same time have someone else operate the lever. IF the levelers begin to work then your problem is with the kick-down hydraulic cylinder on each leveler leg. This is a very common problem - there is a valve in the tiny little kick down cylinder that will not allow the hyd fluid to pass to the large cylinder until the leg/foot is actually straight up and down (not curled up in the stored position). Those little cylinders seals do go bad and they no longer pass fluid to themselves. There is no rebuild kit for the little cylinders, but they are still available and very easy to change :-)
Quote:
Originally Posted by RamblinOn
Oops, I was wrong about the series number. It is a 100 series with the 4 individual joysticks valve body, and all four of the levelers are the kickdown type. I have no serial or model number for the power pack, as the decal with that information is missing.
The cylinders are the same though.. the only difference is the control valve body. You'll need access to a pressure gauge that can read up to 4000psi. Troubleshooting this further without one is frivolous. :-)

What I would do in this case is remove the line from the pump and spin in a pressure gauge to test pressure from the pump. If the pressure tests over 3000 psi the pump is good. Next using the same gauge you can test right at the leveler itself. Should read over 1000psi while operating - if the leveler is not kicking it's foot down, and there is no pressure on the gauge, pull it down manually and see if the pressure comes up and over 1000psi. If you're getting either no pressure or very little at the leveler itself then remove the line and operate the leveler again and make sure you have good fluid flow out of the end at the leveler. Those hyd lines are notorious (as they age) to actually twist up inside and are no longer able to pass fluid.

(submitted as a response via private message too)
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Old 04-07-2014, 05:06 PM   #3
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Thanks Dayne, I also replied pm. I am working on the pressure gauge, will put it to use, and let ya know. May be another day or two, possibly the weekend. Weather is crap here today.
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Old 04-07-2014, 07:43 PM   #4
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i have an 89 pace arrow with what sounds like the same system in it i have an owners manual for hwh model number AP6188 i can make a copy and send it to you if you would like.
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Old 04-08-2014, 11:47 PM   #5
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Thanks much! I sent you a pm cronin069.

Tim
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Old 06-08-2014, 11:48 AM   #6
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Did you get them working? I may be in same boat as you. Going to start troubleshooting today.
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Old 06-08-2014, 01:56 PM   #7
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get a 5000 lb pressure gauge. harbor frt has them for 9 dollars. plumb it in at the u tube on top of the pump. it has to read at least 3000 lbs. that sounds like your problem.
if you can get a service manual, it will walk you thru the diagnostics. i have most of the older manuals. pfmaddox@att.net. 1-602-549-3638 i can fax a copy to you
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Old 06-09-2014, 07:22 PM   #8
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I have yet to find the time to trouble shoot the still existing problem. At one point the pump drive motor wouldn't start. At least now the motor activates and the rear jacks will extend. Still nothing on the two front jacks. That's good info on where to find the press test gauge though, I will puck one up Wed. and the fittings to splice in.

Tim
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