Jacks will not extend if coach is already level

[cracker39]

The HWH levelers on my (---new to me) 2006 Aspect 26a will not extend if the coach is already level on the site. They will deploy - but they stop short of contacting the ground. How do I manually force them to make ground contact in order to stabilize the coach?

[BFlinn181]

What model of HWH jacks do you have? Isn't there a manual setting to allow extending the jacks with buttons? Have you looked for a manual for your HWH model online?

[WILDEBILL308]

What does the owner's manual say? Have you talked to HWH? Here is a link so you can download the manual if you don't have one.
Winnebago Industries Operator Manuals
Bill

[jim27358]

I don't recall ever seeing any HWH jacks that didn't have the option to manually move them. Keep us informed on what you find out.

[cracker39]

Originally Posted by jim27358

I don't recall ever seeing any HWH jacks that didn't have the option to manually move them. Keep us informed on what you find out.

New house batteries (---which my HWH system uses) installed yesterday have greatly improved the jacks performance. They now make contact with the ground and slightly lift the Mh to level - even though, as mentioned previously, the MH started in an already level status. That said, I still cannot manually extend the jacks further. I'm not sure that this constitutes a real problem?

[jim27358]

Thanks, that a new one for me.

[BFlinn181]

Originally Posted by cracker39

New house batteries (---which my HWH system uses) installed yesterday have greatly improved the jacks performance. They now make contact with the ground and slightly lift the Mh to level - even though, as mentioned previously, the MH started in an already level status. That said, I still cannot manually extend the jacks further. I'm not sure that this constitutes a real problem?

With all jacks up, have you checked hydraulic fluid level?

[azpete]

yeah, i would check the fluid level first. if one jack does not extend during the stabilize sequence, you can adjust the pressure switch on that jack to make it go down. loosen the 3/4 nut that locks the plastic piece on the switch. turn it in about 1/2 turn. that adds extra pressure required to trip the switch. this supplies a ground to the control box that tells it the jack is down.
the key to doing a good diagnosis is a service manual. they are free on our website, Welcome to HWH Corporation. it will explain how to do the adjustment.

[cracker39]

Originally Posted by azpete

yeah, i would check the fluid level first. if one jack does not extend during the stabilize sequence, you can adjust the pressure switch on that jack to make it go down. loosen the 3/4 nut that locks the plastic piece on the switch. turn it in about 1/2 turn. that adds extra pressure required to trip the switch. this supplies a ground to the control box that tells it the jack is down.
the key to doing a good diagnosis is a service manual. they are free on our website, Welcome to HWH Corporation. it will explain how to do the adjustment.

I'll give everybody a good chuckle to start the day; I haven't located the pump and reservoir yet! The control panel is located in one of the compartments, so I'm thinking that the pump assembly is nearby - probably under the coach? The control panel looks like it can be detached and moved. The pump assembly wouldn't be hidden behind it by chance?

[azpete]

cracker, the system you have is a 625 auto leveling system. it can be a one touch or two touch system.
the control box is mounted to the end of the pump. look at the top of the black tank for a white octagonal knob about 1 1/4 in size. it has a dip stick on it. make sure to have jacks up wneh checking fluid. dont overfill. the exact level isnt that critical since the tank has about a quart extra capacity. one inch from the top is good.
if you need help, please call me at 1-602-549-3638. paul maddox
i do work for hwh. i do not sell parts or solicit servicev work on this forum

[BFlinn181]

In many gas coaches the reservoir and pump are located under the hood, near radiator or wheel wells. I'd think standing outside the RV while someone operates a jack would allow location by sound of the pump.

[cracker39]

Originally Posted by BFlinn181

In many gas coaches the reservoir and pump are located under the hood, near radiator or wheel wells. I'd think standing outside the RV while someone operates a jack would allow location by sound of the pump.

I talked to the gentleman who did the installation ten years ago and he told me to check behind the coach steps. His memory was accurate, I located the tank, and I was able to determine with my flashlight that the fluid was down about 2" from the top of the tank. Could this have caused the problems I was describing? In any event, I've located a highly recommended HWH specialist up here in the north of Maine. He's going to do a thorough diagnosis on the system next Tuesday.

[BFlinn181]

Having a low reservoir could certainly be a problem. As the tank gets low, the pump could intake air, causing the hydraulic pressure to be reduced. Before calling in a repair person, I'd fill reservoir to the top of the fill hole and cycle the jacks up and down a few times to get air out of the lines. Then check level again, if it's down you'll know air has been displaced. You might give the pump a rest to cool off between cycles.

[cracker39]

Originally Posted by BFlinn181

Having a low reservoir could certainly be a problem. As the tank gets low, the pump could intake air, causing the hydraulic pressure to be reduced. Before calling in a repair person, I'd fill reservoir to the top of the fill hole and cycle the jacks up and down a few times to get air out of the lines. Then check level again, if it's down you'll know air has been displaced. You might give the pump a rest to cool off between cycles.

Good advice - but my size and arthritis just won't permit me to wiggle around into a position where I can fill the reservoir! I've got it scheduled fot next Tuesday.