Thread Tools Search this Thread Display Modes
Old 12-11-2013, 06:37 AM   #41
Rivet Master
1981 31' Excella II
New Market , Alabama
Join Date: Sep 2011
Posts: 6,128
The drums don't need to be baby butt smooth to work with new shoes. The grooves can be shallow and they will take a little longer to break in. I will usually roughen the surface to aid in break in. The ones that really need turning are the ones with deep grooves and ones that were run with the lining completely gone. Also any wedge shaped wear or curved shaped wear would be a reason to turn a drum. I would worry more about the magnet face not being smooth. If you put new magnets on an old drum, any out of flatness will really mess things up. It is best to replace the magnets and drums as a set. Yeah you can grind the magnet face but how much is too much metal gone. I would expect that braking force is a function of how far that magnet has to move to stick to that drum face. At low voltages it may not stick at all because it is too far away.

perryg114 is offline   Reply With Quote
Old 12-11-2013, 12:54 PM   #42
Rivet Master
crabbey1's Avatar
1976 Argosy 22
Pasadena , California
Join Date: May 2013
Posts: 526
Images: 33
Send a message via AIM to crabbey1 Send a message via Skype™ to crabbey1
None of my drums had large grooves but they seem to be taking their time breaking in. Two trips down and still not 100%. I hope they get it together before my cross country jaunt in a couple weeks.
1976 22' Airstream Argosy
crabbey1 is offline   Reply With Quote
Old 12-11-2013, 01:29 PM   #43

2003 25' Classic
Zanadude Nebula , Milky Way
Join Date: Jun 2007
Posts: 16,015
Images: 1
Thumbs up Want to 'burnish' them quicker....

......."lot rot" knuckle buster remedy.

If you can find it,(still got mine), coat the shoe or pad facing with a light coating of valve grinding compound.
Five stops after my Dexter shoe replacement and we were normal.....well the brakes anyway.

"Any nation that can survive what we have lately in the way of government, is on the high road to permanent glory."
Molly Ivins

"Mary-Jane....'cuz 2020 sucks"

ROBERT CROSS is online now   Reply With Quote
Old 12-11-2013, 02:30 PM   #44
1972 Travelux Princess 25
Cobourg , Ontario
Join Date: Oct 2008
Posts: 1,058
There is a way to contour the shoes to fit the drum. This can be done when fitting new brake shoes.

Put the shoe in the drum and see how it fits. Probably it only touches in the middle. Sand down the area where it touches, with a sanding block or belt sander. Keep checking until the shoe makes complete contact.

Brake shops used to have a machine to do this.
Living in the trailer park of sense, looking out the window at a tornado of stupidity.
Ganaraska is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.

All times are GMT -6. The time now is 08:52 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.