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Brake Drag Only When Going Forward
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57RTOval
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PostPosted: Sun Aug 20, 2017 11:34 am    Post subject: Brake Drag Only When Going Forward Reply with quote

Looking for some input on a brake issue on my 74 Thing. It has brake drag when going forward but rolls free going backwards. Any thoughts on why? I just bought this one and don't know the pedigree of the parts in the brake system. The only thing I suspect is the angle of the brake shoe frames is wrong where it meets the brake cylinder and star adjusters. That might cause the shoes to shift when going one way versus the other.
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Q-Dog
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PostPosted: Sun Aug 20, 2017 12:13 pm    Post subject: Re: Brake Drag Only When Going Forward Reply with quote

Maybe a sticking wheel cylinder.
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vwjetboat
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PostPosted: Sun Aug 20, 2017 12:19 pm    Post subject: Re: Brake Drag Only When Going Forward Reply with quote

shoes put on wrong.. over adjusted.. emergency brake cable sticking.. wheel cyl stuck .. brake retaining spring broke..

Have you jacked up and found what wheel or wheels are hanging yet ?
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c705ncp
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PostPosted: Sun Aug 20, 2017 12:44 pm    Post subject: Re: Brake Drag Only When Going Forward Reply with quote

Apart from what has allready been said when jacked up find out which wheel or wheels is causeing the problem. I had a simular problem a few years ago and it turned out that one of the brake linings had come off brake shoe and was riding over ajuster.
Robert
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vwjetboat
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PostPosted: Sun Aug 20, 2017 12:46 pm    Post subject: Re: Brake Drag Only When Going Forward Reply with quote

c705ncp wrote:
Apart from what has allready been said when jacked up find out which wheel or wheels is causeing the problem. I had a simular problem a few years ago and it turned out that one of the brake linings had come off brake shoe and was riding over ajuster.
Robert

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57RTOval
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PostPosted: Mon Aug 21, 2017 6:02 pm    Post subject: Re: Brake Drag Only When Going Forward Reply with quote

Thought I was going to get to look at it tonight but maybe tomorrow. Anyhow, thanks for the ideas. I haven't jacked it to figure out which wheel is the culprit. I suspect one of the fronts. I completely disconnected the e-brake cables and verified the cables move freely. I did pull both rear drums so I know both rear cylinders are working, all the star adjusters have the notches facing upwards like they should. All the springs are good.

So my attention needs to focus on the fronts. I suspect a star adjuster is installed upside down or could be what Robert suggested, a brake lining has come loose.

Now that the grass is cut, I can get back to it tomorrow! Thanks.
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c705ncp
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PostPosted: Sat Aug 26, 2017 3:12 pm    Post subject: Re: Brake Drag Only When Going Forward Reply with quote

Did you find out what the problem was ?
Robert
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57RTOval
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PostPosted: Sun Sep 17, 2017 6:17 pm    Post subject: Re: Brake Drag Only When Going Forward Reply with quote

Still haven't solved the mystery yet. Was convinced it was the back brakes so loosened the e-brake cable and backed off the adjusters. Made sure the front wheel adjusters were good. Brake drag was worse! I picked up new rubber hoses over the weekend at Swapapaluza and will be trying that route next along with loosening the front adjusters.

I'm thinking it's time for a disc brake conversion!
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Ray Syverson
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PostPosted: Tue Sep 19, 2017 6:20 pm    Post subject: Re: Brake Drag Only When Going Forward Reply with quote

Well jack up the front and check for drag. Back off the adjustment if you have to, then test drive it. If the drag comes back then think maybe bad front brake lines, bad cylinder, or bad star springs.
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doublecanister
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PostPosted: Wed Sep 20, 2017 9:36 am    Post subject: Re: Brake Drag Only When Going Forward Reply with quote

This is a strange problem, i'm mulling myself what could be the cause.

I've just done brakes [system rebuilds] on my 51' pickup, 66 Mustang and some work on my 98' F150. June to Aug time frame.

So i'm still somewhat fresh on brakes and the systems,

For something to drag sounds like something's engaging the brakes on one wheel or all? That would have to mean pressure on the system, if not from the M/C, old hoses [when going bad] can cause residual pressure on the wheel cylinders, or the wheel cylinders themselves getting in a bind.

or
In reverse, meaning the brake pads aren't fully releasing....On drum brakes, it could be wheel cylinders, springs, some specific spots (at least on the fords) do require some bit of grease for the brake pads to move back n' forth,

And, We have no photos Sad to look at so a few other ideas came to mind.

Can it be something else dragging that sounds like brakes?

What happens if you pull the brake pads and spin the wheel/axle, do you still hear the noise?
That would be a wheel bearing I'd guess.

One other suggestion, what happens if you back off the brake pads so they don't drag the drums even slightly (not preferred for good brakes) but if you backed off the pads so they don't hit the drum, Engage the pads by pressing the brake pedal a few times, test spin the wheel, that may point to something engaging but not releasing.

(wheel cyl's, hoses, possible M/C)

On my Mustang, I believe my rear wheel cylinders were stuck in the bores and the star adjuster was out of adjustment. Once I pulled them, disassembled them and cleaned them good, they worked fine.

Other "guess" out of round brake drum maybe?

Ok I'm out of guess's and suggestions, hope anything mentioned will spark an idea.

Good luck! post up some photos

T
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