Rear HWH jacks not deploying - fuses?

[Sandy Swede]

The rear HWH jacks are not deploying - the fronts are ok. I have checked the chassis and house fuse\relay panel in front of the drive-side wheel and the main breaker panel (some fuses there also) in the bedroom. Is the HWH system fused or have a relay somewhere I have not looked? Or is this a pump issue?

Note: When I deploying the front jacks, only a small extension brought the coach to level. However, shouldn't the rear jacks at least touch ground?

Thanks much

[Podivin]

I assume you're using an auto leveling function.
Will the rear jacks move if you switch to manual?

Like you, I would expect that the rear jacks would at least deploy to touch the ground. But it could be that when the front jacks leveled the coach quickly that the rear ones just weren't deployed.

[Sandy Swede]

Originally Posted by Podivin

I assume you're using an auto leveling function.
Will the rear jacks move if you switch to manual?

Like you, I would expect that the rear jacks would at least deploy to touch the ground. But it could be that when the front jacks leveled the coach quickly that the rear ones just weren't deployed.

Thanks, Podivin. No, rears won't deploy when I touch manual extension button.

[luvlabs]

A HWH employee is on the forum. Look for the user name "azpete" and send him a PM. He can help you troubleshoot the problem.

[JaminSamin]

Originally Posted by Sandy Swede

The rear HWH jacks are not deploying - the fronts are ok. I have checked the chassis and house fuse\relay panel in front of the drive-side wheel and the main breaker panel (some fuses there also) in the bedroom. Is the HWH system fused or have a relay somewhere I have not looked? Or is this a pump issue?

Note: When I deploying the front jacks, only a small extension brought the coach to level. However, shouldn't the rear jacks at least touch ground?

Thanks much

On my HWH 310 there are a couple of fuses next to the pump.

[RKins]

What model system do you have? 610 or 625 or even the 7xx?

On my 610 system it shows fuses for each jack - they are on the control box. My control box is under the dash strapped to the firewall.
You can download the manual if you don't have one.

[Sandy Swede]

Thanks, JaminSamin and Rkins. I will check the controller near the pump for fuses.

[johnhicks]

Replace the fuses. Doesn't matter if they look good. Worked for me a couple of years ago and still fine. We'd look pretty stupid if that was the problem, wouldn't we?

[GAGypsy]

Take loose the ground lug with a bunch of white wires. Clean the lug, wire connecters to get rid of dirt debris and corrosion, make sure all is clean and has star washers throughout, retighten . Seventy five percent of HWH problems have to do with a bad ground. The other problem is the positive lug on the pump motor. Good Luck

[azpete]

you need a service/operators manual. that will show the location of the fuses and functions of each inside the control box. you most likely have a 625 leveling system. email me and i will send you a copy.
you can identify which system you have by
the touch panel. if it says hwh hydraulic leveling, its a manual push button system. if it says hwh computerized leveling, its a 625 system.
the 4 15 amp fuses at the top of the box are for the hydraulic jack solenoids. if they, or any one of them are blown, you have a burned out solenoid. when two of them are not working, that indicates either a bad ground, or a burned out solenoid. they use parallel grounding, so the one next to the burned out one is also a problem. when you have two burned out, its best to either replace all four, or have them all rebuilt.
email me at pfmaddox@att.net. i havent figured how to attach files here yet.
i can help. 1-602-549-3638
paul maddox
i work for hwh. i do not advertise, or sell parts or solicit service work on this forum.

[Bob Hyatt]

Originally Posted by Podivin

I assume you're using an auto leveling function.
Will the rear jacks move if you switch to manual?

Like you, I would expect that the rear jacks would at least deploy to touch the ground. But it could be that when the front jacks leveled the coach quickly that the rear ones just weren't deployed.

This is a two-stage system. First it levels, to turn off the orange lights. Then it goes into stabilize mode where all 4 jacks MUST touch the ground and have enough resistance to trigger a pressure switch on each jack. This should not affect the level although a couple of times mine stabilized, which turned an out-of-level light on, where it promptly raised that side to turn it off again. The only way you should have jacks off the ground is if you manually level and don't do it properly leaving some jacks up.

[RKins]

Bob remember that the OPs system is an old one. Mine is even older and it dumps air first and then starts leveling, front jacks down first and then rear. It never tries to raise the vehicle much or I've just been lucky and had fairly level sites.

[Sandy Swede]

Thanks folks, I have been sidetracked by the wonderful weather here at Tybee Island after leaving Delaware.

The HWH model # is AP30043 as indicated on a lable next to the pump. I now see that there is an electronic control panel behind plexiglass which contains relays & fuses.

azpete, thanks. I will email you for operators/service manual.

[Sandy Swede]

Had a heck of a time getting the gen to slide out to access the control panel (behind the plexiglass). Now, how do I open the cover without damaging it in order to access the fuses? There is a heavy rubber gasket all the way around the panel and it doesn't feel as if it wants to slide off very easy. Don't want to force anything. As azpete (Paul) mentioned, there are four 15 watt fuses on the top row to be examined.

Paul, I sent you another email, this time with my email address spelled out (duh!).