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HWH Travel mode

While going between campgrounds the passenger side rear tire started rubbing the wheel well. Travel light was on. Used HWH to raise right rear rear side about an inch off wheel well that was as high as it would go. I drove to campsite yesterday. Today same thing no matter how I try to raise right rear it will only raise about 1 inch off the tire.
Any and all help will be appreciated.
Gary & Kathy 🐶 Angus

 94 GV u280 36' build #4419
Cummings c8.3m, Alison MD 3060

Re: HWH Travel mode

Reply #1 –
I'd check the ride height valve adjusting rod on that position.  You can see if you can raise coach manually and make sure the rod hasn't slipped in the rubber collar.  Its a good place to start.

jk
Jack and Cathy
1992 U280 Unihome 36' Build #4034
Cummins 8.3 /  Allison MT647/ PacBrake
Apopka, FL / Barre Center, NY

Re: HWH Travel mode

Reply #2 –
First time having trouble with HWH system.
Is there a sensor for height on each wheel?
Checked sensor linkage is tight seams okay
Gary & Kathy 🐶 Angus

 94 GV u280 36' build #4419
Cummings c8.3m, Alison MD 3060

Re: HWH Travel mode

Reply #3 –
There are two ride height valves in back; one near each set of duals.  There is only one in the front, located over the center of front axle.  All three need to be set to 8-1/2" front top of top plate down to bottom of bottom plate on each air bag.

see:  Ride Height Adjustment


jk
Jack and Cathy
1992 U280 Unihome 36' Build #4034
Cummins 8.3 /  Allison MT647/ PacBrake
Apopka, FL / Barre Center, NY

Re: HWH Travel mode

Reply #4 –
Thanks kimosabe99
Tried using raise all button on HWH Key pad front end came up about 9 or 10 in. Both sides Rear only 1 to 1.5 in. Both sides.
Gary & Kathy 🐶 Angus

 94 GV u280 36' build #4419
Cummings c8.3m, Alison MD 3060

Re: HWH Travel mode

Reply #5 –
When using the HWH control pad to manually raise the coach, you are bypassing the ride height control valves completely and they are not in play. Your symptoms indicate sticking solenoids on the sixpack or a massive leak. If the latter, it'd be loud enough to easily pin point when you're outback standing by the coach. I suppose it could also be something restricting the amount of air entering the rear six pack. Do you get any white powder when you drain the wet tank?
1987 Grand Villa ORED
2001 U320 4010

Not all that wander are lost... but I often am.

Re: HWH Travel mode

Reply #6 –
What is the air pressure showing on the dash gauges when trying to use the "RAISE" button to lift the coach?

If air pressure in brake tanks is good (120psi+) and the rear of the coach will not go up using either the (rear) UP arrow or the RAISE button, then proceed with trouble shooting steps from HWH 600 Series manual:

https://hwhcorp.com/ml11148.pdf

1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: HWH Travel mode

Reply #7 –
Elliott
Cannot hear air leak but engine is running. Is there a way to enter travel with engine off?
Gary & Kathy 🐶 Angus

 94 GV u280 36' build #4419
Cummings c8.3m, Alison MD 3060

Re: HWH Travel mode

Reply #8 –
Chuck
Both tanks are at 120psi. will read your link.
By the way do you know which gauge hand is for front brakes red or white?
Gary & Kathy 🐶 Angus

 94 GV u280 36' build #4419
Cummings c8.3m, Alison MD 3060

Re: HWH Travel mode

Reply #9 –
On my coach the red needle is the front brake tank, white is the rear brake tank.
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: HWH Travel mode

Reply #10 –
Quote from: Gary and Kathy –
Cannot hear air leak but engine is running. Is there a way to enter travel with engine off?
To enter Travel mode with engine off, simply turn ignition key to ON position.  Your dash gauges should come on, and the green Travel light should illuminate (assuming air system is at about 80psi or better).
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: HWH Travel mode

Reply #11 –
Quote from: Gary and Kathy –
Elliott
Cannot hear air leak but engine is running. Is there a way to enter travel with engine off?
To directly answer your question: probably - every HWH panel seems to behave a little differently. On mine, I can enter travel mode by just having the ignition on and pressing the "off" button on the HWH panel and I suspect it'll be the same for you.

However, a better test would be to air both your tanks up completely, shut the engine off, and then put the hwh panel in "manual" mode and attempt to raise the rear of the coach. If the coach doesn't raise at that point, and you don't hear a huge leak, you don't have air getting to your airbags from the six pack (so either one ore more solenoids are sticking or air isn't getting to the six pack despite no leaks, which I've never hear of but is possible)
1987 Grand Villa ORED
2001 U320 4010

Not all that wander are lost... but I often am.

Re: HWH Travel mode

Reply #12 –
Quote from: Elliott –
However, a better test would be to air both your tanks up completely, shut the engine off, and then put the hwh panel in "manual" mode and attempt to raise the rear of the coach. If the coach doesn't raise at that point, and you don't hear a huge leak, you don't have air getting to your airbags from the six pack (so either one ore more solenoids are sticking or air isn't getting to the six pack despite no leaks, which I've never hear of but is possible)
Oh - one other thought: make sure you have a little air in the front airbags when you perform this test. If your coach is the same as mine (Chuck can probably tell us), you have two pressure switches on the front six pack and if they don't read ~15psi they'll prevent you from raising the rear end up. This is to save the coach from twisting so much that you crack the class.
1987 Grand Villa ORED
2001 U320 4010

Not all that wander are lost... but I often am.

Re: HWH Travel mode

Reply #13 –
Quote from: Elliott –
...you have two pressure switches on the front six pack and if they don't read ~15psi they'll prevent you from raising the rear end up.
Actually, the front pressure switches can only inhibit the lowering function in the front of the coach.  They have no control over the raising function.  See excerpt below from HWH Air Leveling Systems Text Book:

https://www.hwhcorp.com/ml20635.pdf

"The front air pressure switches on all 600 and 680 Series Leveling Systems are used during any lower functions, manual operation, automatic operation or use of the "DUMP" button. When the pressure switch for a front bag turns on, it sends a ground signal to the control box. This will inhibit the opposite side front air bags from lowering.
EXAMPLE: While pushing the right side lower button, the right front air pressure switch sees low air pressure. The front lower button is then pushed. The right front lower solenoid valve will turn on and open, but the left front lower solenoid valve will not turn on. The left front bag will not lower. This is done to prevent the front of the vehicle from twisting. If one side of the front of the vehicle is as low as it can go, lowering the other side will twist the vehicle."


1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: HWH Travel mode

Reply #14 –
With engine off and Key on it stays on travel mode and I can hear air coming from travel Valve on passenger rear. Not a tremendous amount but some. With both tanks full 120psi.key off pressing rear up button runs aux compressor raises RR about .5  on. LR about 1.5 in.. after setting a few minutes RR settles back down on tire.
Gary & Kathy 🐶 Angus

 94 GV u280 36' build #4419
Cummings c8.3m, Alison MD 3060

Re: HWH Travel mode

Reply #15 –
Quote from: Chuck & Jeannie –
Actually, the front pressure switches can only inhibit the lowering function in the front of the coach.  They have no control over the raising function.  [/b]:
Ah thanks Chunk, I had it backwards  ^.^d
1987 Grand Villa ORED
2001 U320 4010

Not all that wander are lost... but I often am.

Re: HWH Travel mode

Reply #16 –
Quote from: Gary and Kathy –
With engine off and Key on it stays on travel mode and I can hear air coming from travel Valve on passenger rear. Not a tremendous amount but some. With both tanks full 120psi.key off pressing rear up button runs aux compressor raises RR about .5  on. LR about 1.5 in.. after setting a few minutes RR settles back down on tire.
This to me sounds like sticking solenoids on the rear six pack. Probably time to rebuild your rear six pack
1987 Grand Villa ORED
2001 U320 4010

Not all that wander are lost... but I often am.

Re: HWH Travel mode

Reply #17 –
This long distance trouble shooting is difficult.  So much easier when there in person to see and hear what's going on.

Are you sure the air you hear escaping is coming from the height control valve (leveling valve)?  The rear 6-pack is in the same general vicinity.  You might be hearing air escaping from the exhaust ports on the 6-pack.  Can you hold you hand under the height control valve and feel air coming out?  The exhaust port is on the bottom of the valve.

If you have 120psi in the brake tanks and try to raise the rear with the UP arrow, it should use the pressure in the tank.  It should not run the aux compressor until tank pressure is depleted.  This is puzzling.  Trying to think what would cause that to happen.  Perhaps the HWH control box is not seeing the signal from the system pressure switch on the rear 6-pack and thinks the air system pressure is depleted.  The aux compressor on these old coaches is very weak.  Even if it was working perfectly, it would take the aux compressor forever to raise the rear of the coach off the tires up to travel height.

1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: HWH Travel mode

Reply #18 –
I am a full timer leaving Florida heading to Virginia where will be visiting relatives. I have no kit so it will be kind of hard to rebuild. Is there a common failure and a possible work around. Also where do you get the rebuild kits.
Gary & Kathy 🐶 Angus

 94 GV u280 36' build #4419
Cummings c8.3m, Alison MD 3060

Re: HWH Travel mode

Reply #19 –
Chuck
There is a little air coming from bottom of ride height Valve. Not as much as I am hearing. Could be coming from six pack. Will not raise high enough for me to squeeze under to check.
Gary & Kathy 🐶 Angus

 94 GV u280 36' build #4419
Cummings c8.3m, Alison MD 3060

Re: HWH Travel mode

Reply #20 –
Quote from: Gary and Kathy –
Also where do you get the rebuild kits.
You get the kits from Tom McCloud.  You send him a email and tell him how many kits you want, and he tells you what they cost and if he has them in stock.  You should order two kits if you are interested.  See link below:

Replica HWH Plungers Redux

1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: HWH Travel mode

Reply #21 –
Quote from: Gary and Kathy –
Chuck
There is a little air coming from bottom of ride height Valve. Not as much as I am hearing. Could be coming from six pack. Will not raise high enough for me to squeeze under to check.
Yes, it's going to be very difficult to do any trouble shooting unless you can get the coach back to at least ride height in the back.

There is a work-around to take the ride height valves out of service by pulling a fuse (#11) in the HWH control box, but that doesn't work unless you can get the coach up to ride height.

You could look at the HWH control box to see if any of the fuses are blown.  That is one of the steps in the trouble shooting section of the manual that I linked earlier.  Pay particular attention the the fuses (#7 and #8) for the left and right rear RAISE solenoids.  The control box should be on the front wall or possibly on the ceiling in the front storage bay.  It is an aluminum box with a removable lid.  Mine is next to generator cooling duct.  Fuses are inside the box.  Fuse diagram on page below.

1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: HWH Travel mode

Reply #22 –
Gary & Kathy,

I don't know where you guys are located in Florida.  We have a trusted mechanic friend of the Forum who has a construction company in Leesburg, FL.  His name is Paul Yasbeck.  You might try giving him a call to see if he has any ideas about your problem.  I have no idea if he is home, or traveling, or what, but if he answers I think he would at least offer you his thoughts on this problem.

Foretravel Inspector in FL

https://www.yasbeckconstruction.com

Paul is listed on the Foretravel Service Center Referral List:

http://www.foretravel.com/img/pages/photo/1577780524_owner_service_recommended_service_referral_list_file_path.pdf
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: HWH Travel mode

Reply #23 –
Calling it quits for today, going to go over all the information you'll have given me and try to get it digested enough to make some sense of it. Will be doing something in the morning even if it is wrong.
Gary & Kathy 🐶 Angus

 94 GV u280 36' build #4419
Cummings c8.3m, Alison MD 3060

Re: HWH Travel mode

Reply #24 –
Perfect timing, Tom McCloud just posted that he has more rebuild kits!
Richard & Betty Bark & Keiko our Golden Doodle
2003 U320T 3820 PBDS
Build # 6215
MC # 16926
2016 Chevrolet Colorado 4X4 diesel