Posted 01 June 2012 - 08:23 PM
What are the logically things to check to trouble shoot this problem and determine whether it is the valve block, wiring, or the signal to shuttle the valve back to the travel mode. Also, where does this restore signal come from or is it a default condition. I am a Mechanical Engineer and have excellent troubleshooting skills, but usually need a starting point such as a schematic or a description that describes how the system is connected and what makes it work. I can speculate how the system is probably designed and built, but that does not always work when I do not have a starting point. I have tools and electrical test equipment to do trouble shooting as may be required.
Any help is appreciated.
Thank you in advance.
Posted 01 June 2012 - 10:02 PM
Wish they made all the systems the same,but not the case.
The best help I can give. There is an Air Suspension Manifold Mod. with three 1/4in. air lines that supply air to the air bags. yellow is the color listed in my information,but it could be a different color, there will be 3 of them and they will be the same color coming from the manifold. one for each front air bag and a single one for the back two air bags.
The forth line is white that air supply's line air to the manifold. It comes from the dump valve that drops the ride pressure. Down goes the coach. When one portion of the valve is powered by 12 volts. The other 12 volt feed, powers the jacks up section of the valve and allows air to go to the air ride bags, up goes the coach.
The dump control valve is its name and job. (so you need 12 volts for up and 12 volts for down at the dump valve, going to 2 different points on the dump valve) Check for a good 12 volts and a good ground !!!
Now the trick is to find the valve,not a clue where it would be in your case. Need to fallow that one odd colored line from the suspension manifold Mod.
Must admit that My thought would be to look for the dump valve up near the front, because the supply air line is connected through one side of the park air brake switch, the one you pull out when parked.
That supply line is also 1/4in. and is black in my information. Looks like the line colors change at the dump valve. Black input to White output to the manifold for air ride system.
When you do your manual thing it may be close the the dump valve ?
Hope that helps. Rich.
Work safe its tight under there when the ride is up and even less when its down.
Posted 01 June 2012 - 11:07 PM
So far, knock on wood. I'll be following this thread.
Posted 04 June 2012 - 10:21 PM
I appreciate the response and let you know what I find out if anything as to cause.
Posted 05 June 2012 - 01:14 AM
Just one more item to check. Have you pulled the bled off lanyards for the primary and secondary air tanks on a regular bases? Water in the system can mess up the valves and cause a number if air issues.
The air drier filters should be changed on a regular bases. They can start to fail and sneak up on you.
Posted 15 June 2012 - 04:07 PM
Posted 24 June 2012 - 08:42 AM
In our case, the RV had been jack-up so high (on wooden blocks so the wheels were off the ground) to get it leveled, the normal shape of the "L" rod had gone to a straight line (or "I"). When we let the jacks down the rod reversed itself to a "backwards L". The "on-shoulder of the highway" solution was to jack the RV back-up on blocks until the rod was straight and use a broom stick to guide the rod to go back into its normal position. Watch out, the air bags with "Suddenly" inflate with a "loud pop". We have never jacked the RV up the high again.
I hope this help you.
Posted 24 June 2012 - 09:20 AM
Welcome to the FMCA Forum.
Yes, there IS a learning curve for RV'ing.
Actually, you are VERY lucky. The rear wheels are your parking/emergency brake. Lifting them off the ground, particularly on sloping ground makes it very likely the rig could surge downhill! NEVER raise the rear wheels of any RV off the ground.
And the rod you are talking about controls RIDE HEIGHT, linking the axle to the RIDE HEIGHT VALVE which is mounted on the chassis. Ride height is VERY important and needs to be checked and set to your chassis maker's specs. You can damage the drive shift, transmission and/or suspension components by having ride height out of spec. Just consider the big change in angle on that 18" long DP drive shift if you are even just 1" out of spec.
Brett and Dianne Wolfe
2003 Alpine 38'
Moderator, FMCA Forums
Chairman, FMCA Technical Advisory Committee 2011- Present
Member, FMCA Long-Range and Development Committee 2007-2009 and 2014-2015
Moderator, http://www.dieselrvclub.org/(FMCA chapter)
Posted 11 September 2012 - 08:54 PM
Again thanks everyone.
Posted 12 September 2012 - 12:19 PM
Your report on the solution to your problem helps everyone following this discussion to know what the problem was and how you solved it. Too often the originator of the discussion never returns with a report like yours. This makes the whole discussion much more valuable to everyone. I hope others will follow your example.
Tom and Louise Butler
2004 Monaco Windsor, Cummins 400 ISL
Roadmaster Sterling Tow Bar, Brakemaster, GMC Acadia, BikeE Recumbent Bicycles
After 9 1/2 years full time in our motor home and being Winter Texans we are now living at Sandpipers Resort in Edinburg, Texas. Now we are Summer Chickens!
"The tipi is much better to live in; always clean and warm in winter, cool in summer, easy to move... If the Great Spirit wanted men to live in one place he would have made the world stand still." -- Flying Hawk, South Dakota Oglala Sioux
Posted 12 September 2012 - 07:00 PM
Posted 23 December 2012 - 04:19 PM
Posted 25 December 2012 - 03:16 AM
Could you list the Model HWH system on the coach along with the control panel part number.
Then the posters on the forum can better pin down the problem.
Now to finish playing Santa and some rest.
Posted 28 December 2012 - 10:29 AM
Posted 28 December 2012 - 10:01 PM
Keep me in the loop and pass along your findings. This information leads to a sight that covers the HWH system that might be real close to the system your working on.
Posted 29 December 2012 - 07:34 PM
Also tagged with one or more of these keywords: Leveling, Air bags, Chassis air reset
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