The Ford Barn

Ten1nis · 02-22-2016, 03:34 PM

My '30 CCPU pulses the brake pedal and pulses the braking rate when applying the brakes both forwards and backwards. The pickup has original mechanical brakes. Two questions; what is the easiest way to determine which wheel it is? Secondly, what is causing the pulsation, i.e warped drum, bent lug bolt etc.

Thanks

goodoldvic · 02-22-2016, 03:42 PM

Warped drum, loose backing plate nuts and bolts, wheel bearing adjustment brake linings not making full contact with drums. Just some suggestions there will be more to come. I guess you could disconnect each brake lever clevis one at a time to isolate the offender.

Lawrie · 02-22-2016, 03:45 PM

Also look at the spindle pin fit in the axle,mine were loose and the brakes were all over the place.
Lawrie

P.S. · 02-22-2016, 03:47 PM

Jack the truck up and put jack stands under all 4 corners (under the axles, not the frame). Take the brake rods loose. Front brake rods at the wheels, rear rods at the cross arm. Tighten the adjusters one click at a time as you spin the wheel by hand until they just start to grab, then back off 1 click. The drums that need to be turned or replaced will "pulse" when you spin by hand. Drums that are OK will be smooth all the way around.

When all 4 are adjusted properly, then adjust the brake rods. You will need the brake adjustment tool to hold the brake pedal at the correct points. The procedure is found in "The Red Book"

Mike V. Florida · 02-22-2016, 03:58 PM

I'm with goodoldVic.

Patrick L. · 02-22-2016, 04:23 PM

Sponsored Links (Register now to hide all advertisements)

Main cause are warped drums. There is probably someone in your area that has a drum lathe and hopefully they will still know how to work it.

Ten1nis · 02-22-2016, 06:48 PM

Thanks all for the replies. Got a little bit of work once the weather cooperates

Tom Wesenberg · 02-22-2016, 08:24 PM

My 29 Tudor had a terrible pulse when I bought it, but it was very obvious where the trouble was. The right rear drum and backing plate had a bend and a flat spot from where someone lost the wheel or simply dragged the car on pavement without a wheel.

02-22-2016, 03:34 PM	#1
Ten1nis Member Join Date: Mar 2013 Location: Fishers, IN Posts: 52	Pulsating brakes My '30 CCPU pulses the brake pedal and pulses the braking rate when applying the brakes both forwards and backwards. The pickup has original mechanical brakes. Two questions; what is the easiest way to determine which wheel it is? Secondly, what is causing the pulsation, i.e warped drum, bent lug bolt etc. Thanks

02-22-2016, 03:42 PM	#2
goodoldvic Senior Member Join Date: Sep 2012 Location: New Jersey shore Posts: 257	Re: Pulsating brakes Warped drum, loose backing plate nuts and bolts, wheel bearing adjustment brake linings not making full contact with drums. Just some suggestions there will be more to come. I guess you could disconnect each brake lever clevis one at a time to isolate the offender.

02-22-2016, 03:45 PM	#3
Lawrie Senior Member Join Date: May 2010 Location: Qld, Australia Posts: 4,212	Re: Pulsating brakes Also look at the spindle pin fit in the axle,mine were loose and the brakes were all over the place. Lawrie

02-22-2016, 03:47 PM	#4
P.S. Senior Member Join Date: Jul 2012 Location: California Posts: 1,687	Re: Pulsating brakes Jack the truck up and put jack stands under all 4 corners (under the axles, not the frame). Take the brake rods loose. Front brake rods at the wheels, rear rods at the cross arm. Tighten the adjusters one click at a time as you spin the wheel by hand until they just start to grab, then back off 1 click. The drums that need to be turned or replaced will "pulse" when you spin by hand. Drums that are OK will be smooth all the way around. When all 4 are adjusted properly, then adjust the brake rods. You will need the brake adjustment tool to hold the brake pedal at the correct points. The procedure is found in "The Red Book"

02-22-2016, 03:58 PM	#5
Mike V. Florida Senior Member Join Date: May 2010 Location: South Florida Posts: 14,054	Re: Pulsating brakes I'm with goodoldVic. __________________ What's right about America is that although we have a mess of problems, we have great capacity - intellect and resources - to do some thing about them. - Henry Ford II

02-22-2016, 04:23 PM	#6
Patrick L. Senior Member Join Date: May 2010 Location: Largo Florida Posts: 7,225	Re: Pulsating brakes Sponsored Links (Register now to hide all advertisements) Main cause are warped drums. There is probably someone in your area that has a drum lathe and hopefully they will still know how to work it.

02-22-2016, 06:48 PM	#7
Ten1nis Member Join Date: Mar 2013 Location: Fishers, IN Posts: 52	Re: Pulsating brakes Thanks all for the replies. Got a little bit of work once the weather cooperates

02-22-2016, 08:24 PM	#8
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Pulsating brakes My 29 Tudor had a terrible pulse when I bought it, but it was very obvious where the trouble was. The right rear drum and backing plate had a bend and a flat spot from where someone lost the wheel or simply dragged the car on pavement without a wheel.