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Old 01-27-2008, 10:49 PM   #1
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Brake shoe thickness to replace

Hello All!

Frequent lurker, infrequent poster here. The Ford Workshop Manual, chapter 206-02-01, states that at .039 inches of thickness the brake shoes should be replaced. I am not sure if that measurement applies to the primary (leading) shoe or the secondary (trailing) shoe.

At .040 inches on the secondary shoes of my 07 Focus (LOTS of miles on my daily commuter) there really ain't much material left to wear down until I hit the rivets. The leading shoe on both sides has plenty of meat on them.

Can someone tell me if the workshop manual spec. of .039 applies to the primary, secondary or whichever hits that mark first shoe?

Cheers!

Mike


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Old 01-27-2008, 11:04 PM   #2
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i dont know the work shop spec, but here in Pennsylvania, 2/32nds and below fails inspection
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Old 01-27-2008, 11:07 PM   #3
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I would replace the shoes if any area is down to .040", that isn't much.
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Old 01-27-2008, 11:09 PM   #4
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Quote:
Originally Posted by focusp71 View Post
i dont know the work shop spec, but here in Pennsylvania, 2/32nds and below fails inspection
Do they pull the drums off and check the shoe thickness?

I would think the manual guideline applies to whichever reaches the number first. How many miles does your Focus have...? I replaced my rear drums with discs at 110,000 and the shoes were just approaching the point where I'd start thinking about replacing them.
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Old 01-28-2008, 01:22 AM   #5
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Since shoes come in sets, you replace when 1 of them hits the minimum (otherwise you'll get to metal on metal)
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Old 01-28-2008, 01:44 PM   #6
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Thanks for the replies all. My ZXW has 30,000 miles on it (50,000kms). I bought a new set of pads because the secondary shoes are close to the thickness limit. The reason I posted my query was that with the new set I see that the secondary shoe is 1/2, if not less, of the thickness of the new primary shoe. It caused me to wonder, then, if the factory wear spec. was for the primary or secondary shoe. I have to do the 30,000 mile maintenance schedule this weekend so I wanted some feedback on whether or not I should do the shoes now or just "wait and see" how they look at 35,000 miles.

Cheers!

Mike
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Old 01-28-2008, 02:32 PM   #7
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So wait...are you saying your car only have 30,000 miles on it? There is no way you should be replacing your rear shoes that early, unless Ford radically changed the brake bias or shoe thickness after 2005. As I stated earlier, when I pulled my rear drums off at 110,000 miles there was still enough material left on both shoes, they were just getting close to the point where I'd start thinking of replacing them.

I'd suspect something is hanging up, causing the shoe to ride the drum constantly. Out of curiosity, have you replaced your front discs and pads yet?
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Old 01-28-2008, 06:42 PM   #8
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30,000 miles of mostly city driving probably equals 120,000 miles of mostly freeway driving as far as the brakes are concerned.
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Old 01-29-2008, 08:25 AM   #9
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Duh.....If you wait till the thicker shoe is down to the thickness you specify, then the thinner show will be metal on metal. Know the answer now????
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Old 01-30-2008, 08:00 AM   #10
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SkaAddict - no, the front shoes and pads are OEM installation and show no signs of abuse or premature wear. Methinks I will try to talk to a certified Ford wrench and see if I can get an answer. I agree w/you that it does seem way early to be lookin' at rear brake shoes - which is why I posted my query.

Mr. PDQEagle - Sorry, we can't all be brainiacs like you. You see, there is a reason that the leading shoe of the brake assembly is twice as thick as the trailing shoe. It takes 75% of the braking frictions generated by the rear drum assembly.

Cheers!

Mike
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