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Old 04-04-2020, 08:49 AM   #1
51woodie
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Default Arcing New Brake Linings

Nice weather and nowhere to go, so I pulled the front and rear drums on the '46 to check for wheel cylinder leaks and clean out brake dust. I found that the contact area of the eight shoes ranged from +/- 40 to 80% contact, which is understandable, given drum wear and the quality of some aftermarket parts. As well, there are no places where I live that have the equipment to arc shoes to match drum diameters. I started to sand the first lining using a sanding block and 80 grit paper. I could not get at backing plate side of the lining because of the lip that overhangs the lining. What to do? I decided to make a tool for the job. Using a block of maple I had in my woodshop, I cut and shaped a tool to hold an 1-3/4" X 5" strip of adhesive backed sandpaper. I cut a radius of 6" (12" drums) which is close enough to get the high spots by manipulating where I put the pressure on the sanding block. All the shoes are done now, just have to put drums and wheels back on, and test drive and recheck after the snow is gone and a few miles driven.
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File Type: jpg Left Front Lining Contact.jpg (41.0 KB, 66 views)
File Type: jpg IMG_2195.jpg (29.9 KB, 69 views)
File Type: jpg IMG_2196.jpg (29.4 KB, 67 views)
File Type: jpg IMG_2197.jpg (41.1 KB, 63 views)
File Type: jpg IMG_2322.jpg (34.9 KB, 65 views)
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Old 04-04-2020, 09:06 AM   #2
corvette8n
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Default Re: Arcing New Brake Linings

Wow cool idea, now when are you going into production on that tool.
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Old 04-04-2020, 10:25 AM   #3
deuce5wndw
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Default Re: Arcing New Brake Linings

How about stickon paper inside the drum and bolt the drum on and spin the drum with a handle while adjusting the brake shoe out?
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Old 04-04-2020, 10:34 AM   #4
G.M.
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Default Re: Arcing New Brake Linings

I have a large KR Wilson machine for arching Ford brakes and a big heavy
machine to reline pressure plates if anyone is interested. They are located
in Punta Gorda, FL. Also have equipment to line bore the engines. I think
it does both crank bearings, cam bushings and cylinders. If interested call
1-941-637-1813 after 3:30 P.M. or g.mitchell@fordsrus.com G.M.
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Old 04-04-2020, 12:32 PM   #5
B-O-B
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Default Re: Arcing New Brake Linings

When I did mine on the 34 roadster I used a belt sander with 80 grit ,of course the shoes were off.
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Old 04-04-2020, 01:56 PM   #6
v8nut
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Default Re: Arcing New Brake Linings

Here is a poor man's solution for arcing the shoes if you need to increase the radius as the drums wear. They do need to be off of the car. Use a very heavy ball peen hammer and an anvil. Strike the web of the shoe near the center with a few heavy blows with the ball end of the hammer. This will expand (stretch) the web and thereby increase the radius. Keep testing the shoe against the drum until it fits correctly. Don't go too far. Jim in San Jose
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Old 04-04-2020, 03:06 PM   #7
my4dv8
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Default Re: Arcing New Brake Linings

This is how i re arced my shoes ,hillbilly way. Backed the adjusters right off, found some rolls of sticky backed sand paper and stuck to the drum. Re installed drum and wheel , spun the wheel a while , readjusted shoes ,another short spin and i was done . Super easy and cant really get it wrong, perfect radius now.
Pic two shows poor contact, hard to see in pic 3 but perfect even contact now.
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File Type: jpg 83FDE19D-E2C3-41DE-8DAB-0F25E161BC86.jpg (45.5 KB, 71 views)
File Type: jpg 4CAA81B1-7D72-4D74-B4B2-7D159EFF0BD9.jpg (35.9 KB, 81 views)
File Type: jpg 87355520-15DA-4975-9E72-CEBE69F56A24.jpg (30.3 KB, 76 views)
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Old 04-04-2020, 05:33 PM   #8
philipswanson
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Default Re: Arcing New Brake Linings

Just don't breathe the dust. They are still using asbestos in some brake linings.
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Old 04-04-2020, 06:01 PM   #9
JayChicago
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Default Re: Arcing New Brake Linings

Quote:
Originally Posted by philipswanson View Post
They are still using asbestos in some brake linings.
Really?! With all the asbestos lawyers in this country? Even if manufactured overseas, what distributor/seller would be willing to take that big obvious risk? Could be I guess, but I'm skeptical.
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Old 04-04-2020, 06:22 PM   #10
tubman
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Default Re: Arcing New Brake Linings

Ask the guys in Australia about asbestos content in automobiles.
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