dump trailer axles

In for answer. I have seen the SHC fellow with his flatbed and manual lift, but leaning to this method.

 

I too contemplated installing a manual setup. I am going with the UBL-001. I won't get the valve kit. I am sure I will be able to utilize one of the valves mentioned in previous post

 

Ok, the UBL-001 kit finally arrived. I read in earlier post about the SEALCO 138000. Is this a stand alone valve that replaces the current push/pull valve(air up/exhaust) on my current setup? Or do I run it parallel, or inline from the push/pull valve or run it inline @ supply to kit bags????

 

There are many Valve kits you can use. Haldex Ilas system is a good one. Fully auto. Sealco 138000 is a manual valve that You have to push to lift the Axle. Then when you load the Trailer it will Automatically drop! What all these valves do is make install simple. They are Triggered from the height valve and know when to add air to the lift bags and deflate the ride suspension bags so the axle can go up. And reveresed when you load so it will drop. It is fail safe so the axle drops when loaded. No Driver error!
You can plumb a lift axle with manual ball valves, but you take a big risk of loading axle and forgeting to drop the lift!
Hope this helps, they are used quite alot now by all Trailer builders!

 

Thanks. I totally was going to use a manual ball valve or a T valve that cuts off supply to one line while providing air to another. Seemed simple. Exhaust thee suspension, turn the lever on the T or Y valve, then inflate suspension. The kit bags inflated and the front axle bags stay deflated. Real simple splice of the existing line. Did look up a diagram to the 138000 and it appears as if this valve has 6 ports. As if is aprimary type valve.

 

EverLuc. That tee way will prob not work. Because the UBL kit Bags need close to Supply pressure to lift axle. If you are going the Manual way with ball valves you gonna have to plumb using Pilot valves to trigger deflation of suspension bags. We install these kits on all our trailers. But only use Haldex Ilas due to Canadian laws about automatic drop. I will try to draw a plumbing schematic for you!

 

Yuppers your correct. The line will stay open and the pressure will fluctuate in relation to the leveling valve. I'd have to plumb a shutoff valve in between my magic T valve and the kit, which equals lotsa clutter. I will take a look @ the Haldex valve as well.

 

Ok, pardon all of the (dumb) questions. I did look up the Ilas system. My concern is if oonce the trailer is loaded with any amount of weight, will this automatic lowering feature prevent me from lifting the axle? Granted, I know not to lift it @ full gross weight. Yet, I have a couple of picks that I make where I am about 1/3 of the way loaded. Well, frankly I purchased the lift kit for these particular places.

 

Just get a super inexpensive air tailgate valve.
It has 5 ports.

On one side from top to bottom;
Exhaust, leave open
Supply, this is where you put the line from your ride height valve.
Exhaust, leave open

Other side;
Pulled position port, lift bags
Pushed position port, Normal ride bags
Then mount this valve near the axle that you are using where you can tap it when you want to change it.

I dont understand why this is made into some complicated operation.
The only possible problem with doing it this way is, if the unloaded PSI in the ride bags of the axle that always stays down is not high enough to lift the lift axle.
In that case you will need 2 cheap air valves that cut off flow from leveling valve and then switch the other valve to supply full PSI from your tank under the trailer to supply enough PSI to lift axle all the way.
You could test which valve set up you need once you have the lift bags installed by plumbing them to a gauged regulator and crank it up till they raise.
The only little thing I feel I need to add is, this modification needs to be on the axle that is not connected to the air ride valve.

It is far simpler than you think.

 

Yes, I agree. I am probably making it far more complicated than it is. I just am one of these fools that must research and research in order to do the job once. (Maybe twice if I later invision a better idea). I start the install Monday after lunch. Thank you though on the tailgate valve.