M and G Brake self install

[Adam Hicklin]

I read a thread from a few years ago about self installing an M and G brake system.  I'm considering it. I'm not worried about the toad part, but I'm a little hesitant on tapping the brake line.  Has anyone here actually done it? Is it doable for someone with slightly above average mechanical ability?

[Gerald Farris]

Adam,
It is very doable, and M&G can furnish you with the needed parts. Some toads require extra needed changes like moving a battery or fuse box to gain enough room for the M&G cylinder. Just talk to the people at M&G, they will walk you through the installation.

One other thing is that your 98 Marquis may already have the air brake line factory installed for the M&G brake. My 2000 Marquis had the air line installed and plugged beside the receiver.

Gerald

[Adam Hicklin]

No such luck Gerald.  Like I said, the toad installation is pretty straight forward.  It's going on a Silverado with plenty of room in the booster/master cylinder area.  So on the coach brakes there are two lines which go to each brake diaphragm.  One line from each diaphragm goes to a common relay valve mounted center directly above the drive shaft.  The other line from each diaphragm goes to a separate valve mounted on each frame rail, left and right.  How do I determine which is the service line and where is the best place to tap it, at the diaphragm or at the relay valve?

[Adam Hicklin]

Got the coach side done today. Not as bad as I was expecting. Now on to the toad side..

[Adam Hicklin]

Toad side done with a little help from a friend.  Pretty straight forward with a little creativity to make it interesting. Now to hook them together to see if it actually works.