The Ford Barn

Houston Rodder · 03-13-2011, 10:50 PM

My new Model A coupe runs and drives flawless until I hit the brakes. It has a horrible roar/vibration. It doesn't do it every time which makes it very weird. I am running stock mechanical brakes.The previous owner said that the linkage was vibrating. The brakes stop great but the roar is intolerable. Any help???

pat in Santa Cruz · 03-13-2011, 10:54 PM

perhaps shoe chatter from shoes not arced, or loose backing plate or both in combination. Try to determine which wheel (s) its coming from and tear into it (them) for a look.

Or maybe you have metal to metal contact. Have you checked the shoes??

Tom Wesenberg · 03-13-2011, 11:24 PM

As Pat said, my first guess would be something is loose, like a backing plate, bearings, lug nuts, king pins, etc.

Houston Rodder · 03-13-2011, 11:32 PM

The shoes are brand new. I need to get in there and find the rest out.
thanks

Mike V. Florida · 03-14-2011, 02:04 AM

Quote:

Originally Posted by Houston Rodder

The shoes are brand new. I need to get in there and find the rest out.
thanks

Most likley not arched to fit the curve of the drum and are vibrating.

Tom Wesenberg · 03-14-2011, 08:23 AM

Sponsored Links (Register now to hide all advertisements)

What Mike said was my second thought. I don't know how you brake, but it's important for the first 1,000 miles to break in the brakes by using a light foot on the brake pedal. Let the engine do the braking, and break them in easy, just as you would a fresh engine.

Jim Parker Toronto · 03-14-2011, 08:30 AM

If its the rods that are vibrating, loosen them off at the clevises, and with a pair of vise grips, put a little twist in the rods, and then tighten the lock nuts while the rod is still twisted. This will put a load on the rods, and tighten them up a little. Maybe thats all you need to do!

Milton · 03-14-2011, 11:11 AM

First do a proper brake adjustment which will include adjusting the rods. If it is still noisy check a shoe for the wear pattern.

03-13-2011, 10:54 PM	#2
pat in Santa Cruz Senior Member Join Date: May 2010 Location: santa cruz, calif Posts: 2,011	Re: Model A Brake Problem... perhaps shoe chatter from shoes not arced, or loose backing plate or both in combination. Try to determine which wheel (s) its coming from and tear into it (them) for a look. Or maybe you have metal to metal contact. Have you checked the shoes??

03-13-2011, 11:24 PM	#3
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Model A Brake Problem... As Pat said, my first guess would be something is loose, like a backing plate, bearings, lug nuts, king pins, etc.

03-13-2011, 11:32 PM	#4
Houston Rodder Member Join Date: Feb 2011 Location: Spring, TX Posts: 55	Re: Model A Brake Problem... The shoes are brand new. I need to get in there and find the rest out. thanks

03-14-2011, 08:23 AM	#6
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Model A Brake Problem... Sponsored Links (Register now to hide all advertisements) What Mike said was my second thought. I don't know how you brake, but it's important for the first 1,000 miles to break in the brakes by using a light foot on the brake pedal. Let the engine do the braking, and break them in easy, just as you would a fresh engine.

03-14-2011, 08:30 AM	#7
Jim Parker Toronto Senior Member Join Date: May 2010 Location: Toronto, Ontario, Canada Posts: 1,289	Re: Model A Brake Problem... If its the rods that are vibrating, loosen them off at the clevises, and with a pair of vise grips, put a little twist in the rods, and then tighten the lock nuts while the rod is still twisted. This will put a load on the rods, and tighten them up a little. Maybe thats all you need to do!

03-14-2011, 11:11 AM	#8
Milton Senior Member Join Date: Oct 2010 Posts: 837	Re: Model A Brake Problem... First do a proper brake adjustment which will include adjusting the rods. If it is still noisy check a shoe for the wear pattern.