[Brady]

Rick, see my reply on POG. George

[Robert]

Rick.

There is a relay valve over the tag axle for the coach service brakes. It has two extra ports, both likely plugged. You can get a connection there. No air will go to the toad braking system until the coach service brakes are applied, and when the brakes are released the valve will release that air pressure so the toad brakes will not drag.

Make sure that is the type of air supply the M&G system requires. I use that set up for my Brakemaster braking system. If that checks with what M&G calls for you should have no trouble finding the relay valve if you follow the service brake air line from the brake chamber back up to the relay valve which is bolted to the underside of the coach floor.

[Rick]

M & G is great system Rick, I’ve installed it on each toad myself. It mounts between the master cylinder and vacuum booster. I put it on my Avalanche when I had it and worked great. It was the same model for the Tahoe’s for that year. It needs just a single line tapped into the bus break system and a good spot is where Jon mentioned.

I put the M & G on Cory’s Dakota (used to be mine) and I think he’ll tell you it works really well.

[Bob]

Tom, do you use the M&G on the Jeep as well?

[Terry]

I will be installing it on the Wrangler Jerry. I put it on the Jeep Liberty we had as we’ll.

[Archived]

Thanks for the info. After years of towing vehicles that were “light weight” I knew that towing the Tahoe was in a different class, but I get a little crazy when you have to “tap” into the air system. If Truk can do it I….I can do it!

[Peter]

Rick,

My other buses had the air already run so I didn’t have to do the coach part. My Liberty doesn’t yet have an air line, so you can teach me the best method!

With the weight of the Tahoe, you really do need the brakes.. I sent you an e-mail.

[Corey]

Is there a breakaway valve in the supply line to the toad? If not ,how would the service brake air not be exhausted to the atmosphere upon application, if that supply line between the hitch and the toad was compromised?

[Bob]

There is no break away valve. Don’t take this wrong, but if that line is compromised the resulting leak will be noticed, but you will still have ample air pressure to bring the coach to a safe stop. I would never suggest you drive in that condition, but I would be more concerned about a brake chamber diaphragm failing, in which case the resulting leak would be substantial. Remember, on the service break side of the system you will never lose air pressure unless you apply the brakes so all is OK until you need to make a stop and with planning minimal air pressure will be lost.

In the case of a breakaway if the break occurred between the quick connect and the toad, merely disconnect the toad air line and no more leak. If the hose from the relay valve to the quick connect fitting is what is broken it would have to be plugged or shut off by clamping it with vice grips for example.