Need help! - Brakes

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Mar 28, 2014 | 05:40 PM

smlford

Thread Starter

Fleet Mechanic

Joined: Feb 2007

Posts: 1,318

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From: Mid Atlantic

Need help! - Brakes

A couple of times recently my brakes have been very hot when I stopped.
I took it to my mechanic who took it for a drive and then used an IR thermometer to measure the rotor temps.
The front right and rear left rotors were at least 40 degrees higher than their opposites on the same axle.
He believes it is probably the master cylinder..

Any thoughts?
Thanks!

Mar 28, 2014 | 06:37 PM

jswartz84

Cargo Master

Joined: Jun 2007

Posts: 2,723

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From: Roseburg, OR

A good flush and clean up the calipers.
If the master cylinder was bad, I would expect all corners to be hot or at least in front or rear pairs.

Mar 28, 2014 | 06:38 PM

69cj

Hotshot

Joined: Jul 2005

Posts: 13,834

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From: Middle Tn.

Since the high temps are not uniform I would be more inclined, with the info supplied, that you have calipers that may be sticking. You also need to do rotor run outs as part of the decision.

Mar 28, 2014 | 06:52 PM

Maxium4x4

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From: Ohio

I moved you to SuperDuty for a better response

Mar 28, 2014 | 07:55 PM

A/Ox4

9 ECHO 1

Joined: Aug 2009

Posts: 12,467

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From: Missouri

Your slide pins are probably sticking. Its common. Ford has released revised slide pins. Pull the slide pins and grease them. Install new updated slide pins if you wish.

Mar 29, 2014 | 06:02 AM

smlford

Thread Starter

Fleet Mechanic

Joined: Feb 2007

Posts: 1,318

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From: Mid Atlantic

Thanks everyone!
I had the caliper pins worked on a few thousand miles ago but may have to revisit the issue.

If the master cylinder WAS bad, what would the symptoms be?

Mar 29, 2014 | 07:33 AM

tjc transport

i ain't rite

Joined: Mar 2005

Posts: 65,481

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From: Marlboro Mental Hospital.

if the master cylinder was bad the symptoms would be fluid leaking, or no brakes, or all the brakes dragging.

40 degrees difference is not a big deal. 400 degree difference is a big deal.