replacing brake lines on a 1998 Beaver Patriot Savannah.

[Eric Wallace]

Thanks so much for the quick reply, Eric.
My local FleetPride has that caliper part number in stock. 
I'll verify with them the material of the pistons.
After re-reading all the brake problem posts on this forum it appears the
problem with the phenolic pistons is that water in the system causes them to swell.
A periodic complete purge and refill with new fluid should help that situation if I
can't find anything but phenolic pistons.
Again, thanks for all the information.
Eric

[Carl Boger]

Eric,

This job is pretty much straight forward brake work but the working quarters are tight.  Now I am a fairly fit, fairly low body fat,(15%) person, but I am 6'1" and 220 lbs so I don't fit well in a lot of places. I also have a repaired shoulder that doesn't do well with overhead work.   If your generator is on a front slide than run it out that helps a lot.  The higher you can get the coach also helps!  I drove up on ramps raising the coach 4.5 inches, 6 would have been even better, 12 would have been great. 

This job is doable, but take your time and break it up into small segments.  I was sore for a week after I finished, probably should have slowed down the work but I tend to force my way through.

Hopefully you will git a tip or two out of this,

[Eric Wallace]

As I have continued my project of almost complete replacement of my Monterey brake system I have run into a puzzling situation.
I've tackled the front components first, calipers, pads, booster pump, master cylinder.
The front lines have been relatively easy to trace out, hard to get to, but an understandable path from master cylinder to ABS valve
and on to left and right front wheels.  I just started digging into the rear system and have found a situation I am not understanding.
A brake line diagram would be such a help, but I can find nothing like what I am looking for.  I made a guess that one long line would
go from the front of the coach and tee into two directions going to each back wheel.  What I have found is two long lines going to the
back, one on each side of the coach.  At the end of each long line is a tee with one branch easily seen and accessed going to each wheel. 
The other branch of the tee on each side goes up toward the floorboard and quickly out of sight.  I can't understand where they would be going.
Have any of you who have done replacing of your lines found this situation?
Also, what seems odd is that all the up front steel lines are 1/4", while the two long lines going to the back are 3/16". 
Does that make technical sense?
Thanks for any ideas.
Eric

[Carl Boger]

My best guess would be that someone replaced the rear brake line earlier, and then abandoned the old line leaving it in place.  This is a common practice since it cuts down on labor cast.  On my coach I replaced the rear line and then just cut off the old line as short as possible without trying to remove anything that wasn't convenient to get to.  Hope this helps.

[Eric Maclean]

Ok Eric
It appears your coach has an ABS system on it in which case each wheel will have an individual brake line which will run from the caliper to an integrated ABS
Control valve .
If you've found the ABS control valve it should have 4 brake lines running out one for each wheel end there should also be a tone ring and wheel speed sensor on each wheel
I'm not sure which system Beaver used on the Magnum chassis but I assume it is a meritor wabco system like the one in the link below.

https://graphicvillage.org/meritor/MM0677.pdf


Hope this helps
Eric

[Eric Wallace]

Thanks, Carl and Eric,
On further, and dirtier, inspection today I discovered a couple of things. 
There is a long steel line on each side of the coach leading from the ABS valve back to each rear wheel.
It turns out only one side has a tee in it, not both as I mistakenly said yesterday.
The tee on the passenger side turns down to the RR wheel while the other branch goes to the back of the coach into a proportional valve tied into the coach air system.  We bought the coach barely used over twenty years ago and I had forgotten that early on  I had installed an MG Brake Systems braking system for a prior toad.  In prior times my memory would not have let me down as it does more and more these days.
Yes, I have a Meritor/Wabco ABS system very similar to the attachment you added, Eric. 
After removing the air conditioner condenser between the rails right in front of the fuel tank it looks like I may have just enough working room to install new steel lines from that valve to each of the wheels. 
It's an unpleasant job but the thought of a well working brake system is providing incentive.  We love our coach, but the poor braking has been a weak link in our enjoyment of the coach for a long time.

[Eric Maclean]

Sounds like your well on your way.
I found a good gym mat to be a god send for the knees and back when working under the coach
Keep in touch
And good luck