(800) 853-2651
SHOP NOW

Brake rotor run out

3

37chief

Well-known Member
Location
California
I had the rotors resurfaced on my E450. One is .004 run out, the other side is .010 run out. The spec says max .004. Will I get pedal pulsating with .010 run out? Any thoughts? New china rotors with hub attached are around 200.00 each plus shipping. Who knows if they will be much better. Stan.
 
What is the runout on the front face of the rotor versus the rear of the rotor? Thickness variation is what causes pulsation. Runout in itself doesn't cause pulsation, but the high spot constantly hittin the pads causes hot spotting, which causes thickness variation. I would hang new, put on tons of China rotors with nary a problem.
 
The rotors are exactly the same thickness all the way around, so maybe the run out isn't that big of a problem. Stan
 
Factory runout specs are generally on the conservative side. The .010 runout will not be a problem as long as there is no variation in the thickness. Runout will make the caliper sliders slide in and out slightly when brakes are applied, and will cause the pads to run a bit further from the rotor when brakes are not applied. When runout gets excessive, it will generally cause a soft or low pedal and sometimes a bit of a "chirping" noise at low speeds. At .010, the effect will be negligible.
 

You can by shims for that are index the rotor to the hub and see if that helps... I would run it and see how it runs out. Unless its machined on the truck no machining on a common stand along brake lathe will be dead nutz...
 
I can't use shims. The hub and rotor are one piece. I may try to set it up in my lathe. I probably can get it closer than his brake lathe. Stan
 
(quoted from post at 14:34:06 11/08/17) I had the rotors resurfaced on my E450. One is .004 run out, the other side is .010 run out. The spec says max .004. Will I get pedal pulsating with .010 run out? Any thoughts? New china rotors with hub attached are around 200.00 each plus shipping. Who knows if they will be much better. Stan.
Click to expand...
IMHO once the brakes are warmed up and cooled down several times the .010 runout will not matter.
 
You must log in or register to reply here.

Similar threads

D
Brake problem
Replies
1
Views
537
deanostoybox
D
620 John
'51 B 12 volt conversion
Replies
10
Views
1K
620 John
620 John
J
555 Torque Converter and Engine Install
Replies
6
Views
990
Bern
B
3
Turning brake rotors
Replies
12
Views
1K
37chief
3
3
My cheepy brake job
Replies
13
Views
1K
Hobo,NC
Hobo,NC
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top