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Hooking up air brakes for tow car

February 27, 2016, 11:56:57 am

I just installed a M&G brake & breakaway on my tow car,now I'm connecting coach to quick connect , I installed quick connect at rear ran 1/4 air line to axle now I'm stumped, M&G supplied me with a 1/4 street Tee, looking at both relays one is for spring brakes and other for brakes , large rubber lines to spring brakes and looks  like 3/8's plastic air line to front, do you tie in before relay? Do you use a 3/8's street Tee with 1/4 on one side to tow car? Or is there a port for it . Any one have pictures?

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Re: Hooking up air brakes for tow car

Reply #1 – February 27, 2016, 12:43:40 pm

Art, here is a link to others asking same q. I think you connect to service brake port on air brake can then tee it off to quick connect fastened to rear cross member for ease. Read posts and do not take my word for it first.
PM Don acousticart as he had a problem with his before he did the correct install himself.
JohnH
having trouble this end to put link in-sorry. Here I have copied a link from a MG info page from an installer.

The Installation

Installation on the coach is very simple. You simply tap into one of the brake service lines at the rear axle with a tee fitting, then run the extra nylon line to the rear of the coach where you install a quick disconnect coupling. Tapping into this line is no different than feeding a tag axle. In the event of a failure the brake system's isolating valves would still give you 3 wheels worth of braking and the air pressure loss by a severed line would be very minimal because it's the service line, not the "hot" supply line.

On the towed vehicle end you first have to install the M&G adaptor.

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Re: Hooking up air brakes for tow car

Reply #2 – February 27, 2016, 02:18:30 pm

I just sent you a photo of my factory hook up to your phone, hope that helps.

Don had an issue, in that the Quartize installer tied into his spring brake, so the Fit's brakes came on when the coach dash button was pushed in!!!!

Don figured it out and moved the supply line connection.

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Re: Hooking up air brakes for tow car

Reply #3 – February 27, 2016, 03:03:02 pm

So it looks like the line that goes to the brake one side I don't think it matters of it is left side or right side as long is it is the relay for the brakes not the E-Brake , pulled one line off and tied in to it? Dave the picture came on my I-Phone and no phone#

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Re: Hooking up air brakes for tow car

Reply #4 – February 27, 2016, 03:09:21 pm

You just double click your message, my number should be there.

But you can call:
214-850-8303

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