Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-09-2002, 05:29 PM   #1
3 Rivet Member
 
68 Suburban's Avatar
 
Join Date: Oct 2002
Posts: 104
Electric Brake Question.

Does the magnet ride along the inside of the drum? Does it actually contact the drum? Thanks
__________________

__________________
68 Suburban is offline   Reply With Quote
Old 10-09-2002, 05:36 PM   #2
uwe
418
 
uwe's Avatar
 
2007 25' Safari FB SE
1958 22' Flying Cloud
1974 29' Ambassador
Yucca Valley , California
Join Date: Jun 2002
Location: 1963 26' Overlander
Posts: 4,767
Images: 41
Send a message via Skype™ to uwe
A Drag

yes, when activated by the brake controller the magnet slides on the inside of the drum, which in turn drags the lever with the rotation of the drum, which in turn expands the brake shoes which in turn slows things down.
So, the magnet is actually a part that needs periodic inspection, sometimes replacement. The brake drum has a machined surface which the magent drags on when activated.
__________________

__________________
Uwe
www.area63productions.com
uwe is offline   Reply With Quote
Old 10-09-2002, 05:38 PM   #3
3 Rivet Member
 
68 Suburban's Avatar
 
Join Date: Oct 2002
Posts: 104
Thanks for the info. How can you tell if a magnet needs to be replaced? Thanks
__________________
68 Suburban is offline   Reply With Quote
Old 10-09-2002, 05:48 PM   #4
uwe
418
 
uwe's Avatar
 
2007 25' Safari FB SE
1958 22' Flying Cloud
1974 29' Ambassador
Yucca Valley , California
Join Date: Jun 2002
Location: 1963 26' Overlander
Posts: 4,767
Images: 41
Send a message via Skype™ to uwe
I have not had to replace mine, but i would look for a magnet that shows severe wear patterns, or grooves. Also, the magnets are supposed to be shaped like a small brick, some are oval, and should be replaced if they are worn out of shape. Out of shape would be uneven, like thinner on one side.
Hopefully another member will have a more scientific explanation. Of course you need to check the brake drums at the same time.
I would replace everything on the brake system if the magnets and shoes are worn.
__________________
Uwe
www.area63productions.com
uwe is offline   Reply With Quote
Old 10-09-2002, 07:48 PM   #5
Rivet Master
Airstream Dealer
 
Inland RV Center, In's Avatar
 
Corona , California
Join Date: Feb 2002
Posts: 16,499
Images: 1
Round magnets should be replaced when the "top" of the three screw heads start to wear. Should the magnets not be replaced at that time, and if the magnet is wearing unevenly, and they usually do, you will take the chance of going into the wire coil, which means an instant short in your brake system.
Typical all around mileage expectations for round magnets are for a single axle, about 15,000 miles. For tandem axle trailers about 18,000 to 20,000 miles. Shocks should be replaced at every other magnet replacement. Brake shoes on single axle trailers usually last about 40,000 miles, and on a tandem, about 50,000 to 60,000 miles. A bearing repack should be done once a year, or, every 10,000 miles, whichever comes first. Grease seals should be replaced at every bearing pack. Running gear should be balanced every 10,000 miles.


Andy
inlandrv.com
airstreamparts.com
__________________
Inland RV Center, In is offline   Reply With Quote
Old 10-11-2002, 01:47 AM   #6
3 Rivet Member
 
68 Suburban's Avatar
 
Join Date: Oct 2002
Posts: 104
Andy, Shocks for an 1968 Avion T-22 Dual Axle trailer?
__________________
68 Suburban is offline   Reply With Quote
Old 10-11-2002, 10:10 AM   #7
Rivet Master
Airstream Dealer
 
Inland RV Center, In's Avatar
 
Corona , California
Join Date: Feb 2002
Posts: 16,499
Images: 1
Not sure what Avion used back then. Give me the retracted and extended dimensions, and is it horizontal or vertical? I will check it out for you.

Andy
inlandrv.com
airstreamparts.com
__________________
Inland RV Center, In is offline   Reply With Quote
Old 10-11-2002, 10:14 AM   #8
3 Rivet Member
 
68 Suburban's Avatar
 
Join Date: Oct 2002
Posts: 104
It is a smaller vertical shock. I will have to measure it today. It has stud mounting on both ends and no eye mounts.
__________________

__________________
68 Suburban is offline   Reply With Quote
Reply


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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Brake System Question joshua32064 Brakes & Brake Controllers 8 09-24-2003 10:37 AM
Brake Controller Question Rickk48 Brakes & Brake Controllers 3 03-17-2003 04:30 PM
Electric Brake Question 68 Suburban Brakes & Brake Controllers 6 03-04-2003 09:09 PM
Loaded question: avg miles per set of brake pads John Brakes & Brake Controllers 2 12-12-2002 06:01 AM
Electric Brake Controller Problem Don Brakes & Brake Controllers 4 04-15-2002 02:05 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 07:28 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.