Alert !!!!/ Toad Air Brake Tn rally

Thanks, Pete for standing behind your product and providing the membership here with such a thorough and complete discussion regarding the installation process and the operation of AFO.

Having followed this discussion, I now have considerably more confidence in the system installed for us at the rally.

Anyone can look good when everything goes right (which rarely happens with anything mechanical) but, in my opinion, it's how someone reacts when a problem occurs that separates the best from the rest.

Again, thanks for being so responsive to our concerns.

I left out of Gainesville Fl. yesterday morning for the short ride back to Jupiter. The ride went smoothly (30 mph wind gusts). As we left 95 for the ramp into Jupiter I noticed a loud howling or squealing sound coming from the back of the bus. Nothing on the gauges showed me exactly what was going on but I knew it was not necessarily good.

I decided to get off the road and limp into my slip near home a few miles away.

The noise was deafening now and when I came to a stop next to my slip I noticed that both brake gauges were now at 80lbs. but holding there. I looked under the to see the same old line and valve hanging down next to the drive shaft air streaming out of the open end, plus the valve stem had been severed off at the threaded end.

I can not understand why this has happened again, there does not to appear to be a good reason for the failure twice in the same location.

I am not certain how to make temporary repairs at this time. want to stop the leak detach the lines to the Toad Brake valve and seal the main/Air force One Air tank leak so that my main brake air tank is not continually drained down by the demand on the open valve port on the Air Force One tank.

If my attachment has been uploaded you will see where the problem is.

I want to get under the bus to examine this better, plan on tilting the airbags over to one side, placing the Prevost Jack on the high side for safety and then detach the dangling valve, and try and screw into the Airforce One Air tank some type of threaded screw to seal the hole, any ideas.

Quote:

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Originally Posted by 0533

I left out of Gainesville Fl. yesterday morning for the short ride back to Jupiter. The ride went smoothly (30 mph wind gusts). As we left 95 for the ramp into Jupiter I noticed a loud howling or squealing sound coming from the back of the bus. Nothing on the gauges showed me exactly what was going on but I knew it was not necessarily good.

I decided to get off the road and limp into my slip near home a few miles away.

The noise was deafening now and when I came to a stop next to my slip I noticed that both brake gauges were now at 80lbs. but holding there. I looked under the to see the same old line and valve hanging down next to the drive shaft air streaming out of the open end, plus the valve stem had been severed off at the threaded end.

I can not understand why this has happened again, there does not to appear to be a good reason for the failure twice in the same location.

I am not certain how to make temporary repairs at this time. want to stop the leak detach the lines to the Toad Brake valve and seal the main/Air force One Air tank leak so that my main brake air tank is not continually drained down by the demand on the open valve port on the Air Force One tank.

If my attachment has been uploaded you will see where the problem is.

I want to get under the bus to examine this better, plan on tilting the airbags over to one side, placing the Prevost Jack on the high side for safety and then detach the dangling valve, and try and screw into the Airforce One Air tank some type of threaded screw to seal the hole, any ideas.

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I appear to be having problems attaching the pics for better assessment. I will continue to try.

Bruce, not sure how many lines you have to cap off, but for the short term if you can get to them use vise grip pliers to crimp the end to get you to somewhere where you want to do the permanent fix.
Sometimes you have to bend the line over and hold it there.
If you carry ss lock wire and you have more leaks than pliers, fold over the line and secure it with lock wire, and wrap with tape. A tiny leak will probably be tolerable.
Good luck and keep us posted :rolleyes:
JIM

Quote:

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Originally Posted by JIM CHALOUPKA

Bruce, not sure how many lines you have to cap off, but for the short term if you can get to them use vise grip pliers to crimp the end to get you to somewhere where you want to do the permanent fix.
Sometimes you have to bend the line over and hold it there.
If you carry ss lock wire and you have more leaks than pliers, fold over the line and secure it with lock wire, and wrap with tape. A tiny leak will probably be tolerable.
Good luck and keep us posted :rolleyes:
JIM

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Thanks Jim,

I will try this as a short term fix. I plan on heading up to Prevost for some other regular service and this might make it easier than trying to go all the way with a complete fix as I really need to get a handle on why this has happened twice now, and how to find a way to make sure it will not reoccur.

I wanted to attach a few pics that might offer some insight, but each time I try and upload an image file Gif 570KB the POG. server will not respond, both in Safari and in Firefox, wonder if others are having this problem??

Bruce,

Don't worry about pictures for us until you and the coach get to safety.

I will assume these problems with the braking system are isolated, but for anybody that has one of these systems I would strongly urge before you travel with your coach to add a 90 degree shutoff valve (ball valve) in the supply line to the braking system air supplies. Then no matter if you get a broken fitting or a defect in the device all you need to do is get access to the valve and shut it off. Then you can deal with the leak on your own terms.

Think of the valve the same way you would a circuit breaker. It is just there in case you have to shut down the system for service.

Bruce,

Try to save your photos as JPEG it should work better.

Alek

Quote:

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Originally Posted by Jon Wehrenberg

Bruce,

Don't worry about pictures for us until you and the coach get to safety.

I will assume these problems with the braking system are isolated, but for anybody that has one of these systems I would strongly urge before you travel with your coach to add a 90 degree shutoff valve (ball valve) in the supply line to the braking system air supplies. Then no matter if you get a broken fitting or a defect in the device all you need to do is get access to the valve and shut it off. Then you can deal with the leak on your own terms.

Think of the valve the same way you would a circuit breaker. It is just there in case you have to shut down the system for service.

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Good idea Jon.

I am confused why this is happening. The last time the valve was pinched by the top of the drivetrain well when I was using my auto leveling.

This time I was simply driving along and it gave way.

I am not pleased with the experience and need to find a better way to have this entire system installed as I believe it will happen again.

It appears when they tap the air off of the main system there is no fail safe built in to protect the braking system in the event of a failure.

Your picture shows a standard Bendix R-12 relay valve (with 4 port) and a pressure regulator (it doesn't permit air to pass through until a preset pressure is reached, usually 65 or 95 pounds) dangling by nylon tubing. I'm sure the howling you heard was your rear brakes engaging as the parking brakes began to set up. No low air buzzer? Just lights and a gauge? Why wouldn't the manufacturer just tee off your existing relay emergency valve? Was that R-12 added by your toad brake supplier? I carry an assortment of tubing fittings in various sizes so I can cap a line if necesary so I can get off the highway and to a service provider.

Can you say M&G