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02-22-2016, 03:34 PM | #1 |
Member
Join Date: Mar 2013
Location: Fishers, IN
Posts: 52
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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 |
Senior Member
Join Date: Sep 2012
Location: New Jersey shore
Posts: 257
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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.
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02-22-2016, 03:45 PM | #3 |
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Join Date: May 2010
Location: Qld, Australia
Posts: 4,215
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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 |
Senior Member
Join Date: Jul 2012
Location: California
Posts: 1,696
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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 |
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Re: Pulsating brakes
I'm with goodoldVic.
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02-22-2016, 04:23 PM | #6 |
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Join Date: May 2010
Location: Largo Florida
Posts: 7,225
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Re: Pulsating brakes
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02-22-2016, 06:48 PM | #7 |
Member
Join Date: Mar 2013
Location: Fishers, IN
Posts: 52
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Re: Pulsating brakes
Thanks all for the replies. Got a little bit of work once the weather cooperates
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02-22-2016, 08:24 PM | #8 |
Senior Member
Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
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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.
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