machining backing plates for Juice brakes
 

how much do I need to machine off the backing plate lip to clear the drums? I do not wont to run axle shims

Re: machining backing plates for Juice brakes
 

Not sure. Did you try a search? I've seen the figure some place and believe it could vary from car to car but something like .100 comes to mind. What if you "dry fit" the backing plates and drums??
In my mind I can see posted pictures, with how to rotate the backing plates, etc but can't remember where.
Have you tried asking on the HAMB< Banger section?? Or try contacting Cling's, he may have a dimension he'd be willing to share.
Paul in CT

Re: machining backing plates for Juice brakes
 

Lay the backing plate on the axle and mark the back with chock and start removing a little at a time till it fits like you want it to. The Drawings are from Less Andrews green book.Happy grinding!

Re: machining backing plates for Juice brakes
 

If you have the rear end apart you can machine .090" - .100" off the housing ends, this moves the backing plate inboard that amount and no shims would be needed.

Re: machining backing plates for Juice brakes
 

Les Andrew's book 2 walks you through it completely. The rear drums also need to be machined down, as well as the backing plates.

Re: machining backing plates for Juice brakes
 

Install a axle shim and you will have the proper clearance I installed my bp upside down and reversed them for e brake.
Dave

Re: machining backing plates for Juice brakes
 

Almost 50 years ago,I installed 46-48 Ford brakes on an A.Mount the V8 b-plates on theA hsg & you will see where the mounting holes will have to be filed to match the A bolt circle .If I am wrong,my memory may be off after 50 years.To keep the drum from rubbing b-plate,grind off some of the inner edge of drum until it clears.I just used 2 shims on each side made from a tin can& had no problem in thousands of miles.No lathe work is required unless you like spending money.On the front,all you need is an adapter kit to center b-plate to spindle & a spacer for inner wheel brg.The kit is nothing more than a correct size piston ring & valve seat ring .The kit is available at all the vendors. Lastly,hyd brakes are NOT needed on an A if the original mech system is PROPERLY rebuilt & adjusted.

Re: machining backing plates for Juice brakes
 

The problem with shims is that they tend to fall apart under usage. It is best to not use them unless absolutely necessary. Been there, done that!

Re: machining backing plates for Juice brakes
 

My m/c is the one that is mounted to a new battery box. Great system, bolted right in.

However (and this issue is now a 3 page string on the HAMB) I have to pump the brakes once to get full pedal. About 50 percent say I need residual valves, 10 lb front and back for drum drum application. The other 50 percent say don't need the residuals. I am going to try them.

Banky

Re: machining backing plates for Juice brakes
 

Banky,what master cyl do you have? The 46-48 ford and the mustang drum-drum dual cylinder have built in residual valves and have both worked well on my A.
. A friend had a truck that took two pumps to get pedal and we found the drums and shoes were worn out. The Ford master cylinder did not have enough volume to push the shoes out far enough with one pump.

John

Re: machining backing plates for Juice brakes
 

some one posted a good link to the HAMB about this and its gone can you please repost the link... thanks ...Brendan

Re: machining backing plates for Juice brakes
 

anyone remember the post on the hamb?

Re: machining backing plates for Juice brakes
 

This is an article on the HAMB in regard to various Ford years and the change over to Hydralic brakes. There is reference on the #2 msg of the thread and reference's Model A's and juice brakes. The members name on the Hamb is Modernbeat, thread is titled BRAKES, The Brake Article to end all Brake Articles , article in thread titled:
ABOUT BRAKES
By Denny Art
From Rod Action circa 1975

http://www.jalopyjournal.com/forum/s...late+machining