The front air suspension has a leak. the rear airs up fine and will maintain height but the front will not. Not sure how this system works. I did track the issue to the valve in the photo. Any assistance would be helpful. thanks
Is that the ride height control valve. Is there a follow up arm back behind that picture attached to the valve. Should stop venting air when level is reached I carry a spare if it continues to vent once down to below ride height
Scott
It is your leveling valve. You will need to replace it as there is no way to rebuild it. See https://www.finditparts.com/products/50451/arvin-meritor-s4640024430. You can get a cheaper plastic version but I have heard a lot of mixed reviews on those. After you replace it you will need to check your ride height on all 4 corners and adjust the rod on the leveling valve accordingly.
Where do you buy a leveling valve?
Amazon.com: Truck/Trailer/Bus Height Control Chassis Air Suspension Valve... (https://www.amazon.com/Trailer-Control-Chassis-Suspension-Linkage/dp/B07L16M394)
It may be just an arm adjustment. You can loosen it and move it up and down to view the operation and at some middle point it will stop venting if it is still good. Aired up, key on, engine off. Or perhaps it is a fitting leaking. You were not specific.
If you decide the valve needs to be replaced, Google for "Meritor S4640024430" and Google will present you with several purchasing options to include Meritor/Wabco and less expensive alternatives.
Question, Is the valve leaking with the HWH level system in Travel Mode, ie. Travel light ON?
If your air bags were low when your air compressor (engine) was running, it was likely your height adjuster or lines to it. If this happens only while you were parked it would not be adjuster. I had a problem with a front leak where I would have to run the engine (and compressor) to bring up the pressure while parked. I traced the leak to the front air regulator that I never knew about. It looks like an ordinary air regulator that you would find on your shop air compressor (I bought one at HD for about $13) It looked a lot like the one in this link:
Amazon.com: AB-9051114 Air Compressor Replacement Pressure Regulator For... (https://www.amazon.com/AB-9051114-Compressor-Replacement-Pressure-Regulator/dp/B07WTR1QWJ/ref=sr_1_5?dchild=1&keywords=husky+air+compressor+regulator&qid=1601665802&sr=8-5)
I have an air tank leak. Right, forward passenger side. The air leaks while parked. With engine on, the HWH will show I'm in travel mode, but the right side is still too low. I can manually air up this side then engage travel mode and all is well. This will stay aired up for the travel and for about 24 hours after parking. Any ideas ??
The tech beleives the ride height valve is the issue. See picture. The front end of the coach will not stay aired up. the rear end is ok. There is a loud air leak that you can hear when the rig is running.
reece1975,
That ride height valve looks like it is almost new. Was it replaced recently? The only place air should exit that valve is through the exhaust port (rubber cover) on the bottom. If the coach is sitting at correct ride height, the rod connected directly to the valve should be perfectly horizontal. With engine running there should be no exhaust from the valve. In that condition, if the rod is (manually) moved down from horizontal (like in the photo), then air will be exhausted from the bottom port.
If the coach is raised up on safety stands (as it appears to be in your photos) and the engine is running, air will be continually exhausted from the valve as it attempts to lower the coach to ride height.
In other words, you can only verify the correct operation of the ride height valve with the engine running and coach at correct ride height.
What is the difference between Meritor S4640024430. vs Haldex 90554241 Do they hook up differently?
Meritor almost 200 Haldex 55 just wandering
Chris
I put this one on front in August. Still working fine.
Leveling Valve Air Ride Height Control Valve 90554241 Immediate Response... (https://www.ebay.com/itm/Leveling-Valve-Air-Ride-Height-Control-Valve-90554241-Immediate-Response-H-30511/273380628091?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649)
jk
FYI, in an emergency you can drive the coach by removing the adjusting rod, and rotating (small movements) the ride height valve until air stops venting. If you cannot find a way to stop venting, seal air lines.
Then raise coach to approx. drive position with HWH, then drive until ride height is replaced.
We often talk about sealing air lines, but don't often say how. Even if you don't have special purpose plugs, you can always just double back on an air line like you would kink a water hose to stop flow. You can then maintain the kink with a zip tie, duct tape, string, etc.