Reply
 
Thread Tools Search this Thread Display Modes
 
Old 09-15-2013, 01:43 PM   #1
1 Rivet Member
 
1985 34' Sovereign
Livingston , Texas
Join Date: Jan 2009
Posts: 9
New Dexter axles lack trailer braking power

1985 34' 3 axle Sovereign used full time for 19 yrs. New Dexter 3600# axles replaced former 2800#. Prodigy controller (11 yrs old). All worked fine at 5.3 with old axles. Using controller only cannot get wheels to lock at power 13 @ 25mph. Read brake and axle forums, can it be that additional trailer brake only stops are needed to break in the drums? at greater speeds? Numerous stopping tests already done at 25mph. Using TV & trailer brakes results in a bit of rubber from front tires of TV (35-40mph). No fishtailing. TV voltage output tested ok (Suburban 3500).

Also, re heavier axles, should we anticipate deterioration of the trailer body that some mentioned (no reference to 34' footers and problems)? Already changed from 4" drop Hensley to straight due to rise in height of trailer.
__________________

__________________
krohnjs is offline   Reply With Quote
Old 09-15-2013, 02:41 PM   #2
1 Rivet Member
 
1985 34' Sovereign
Livingston , Texas
Join Date: Jan 2009
Posts: 9
New Dexter Axles, Lack trailer braking power

1985 AS Sovereign 34'; 2005 8500 Suburban, Prodigy Controller (full time 19 yrs). Recently replaced 2800# axles w/3600# Dexters. Now lack trailer braking. Old axles brakes stopped trailer fine at 5.3, b3. Many road tests, trailer brake only @ 25mph, no locking at pwr 13. In the past, brake changes tested at pwr 6 @ 25 mph produced sliding and adj power down to no locking and worked fine. Voltage checked on TV cord at 11.8.

Read much of the axle and brake forums. Since new axles, many road tests trailer brake only @ 25-40mph w/o lockup on pwr 13 (some on gravel, no lock up there either) and only marginal stopping power. With both TV and trailer brakes, noticed bit of rubber marks from both front TV wheels; no trailer fishtail (on hard surface). Can it be that more testing with trailer brakes only might set them? at higher speeds? Some improvement (no hitch clunking, pushed feeling) over first test (done at the usual pwr 6, virtually no stopping).

Changed the Hensley hitch from 4" drop to straight due to rise in height from new axles and made some adj to struts and stabilizers @ Hensley's suggestion.

Any suggestions appreciated.

Also, some posts implied that heavier axles could lead to more wear and tear on the trailer body. Anyone experienced this? Only travelled 100 mi on new axles; didn't notice any undue disarray inside.
__________________

__________________
krohnjs is offline   Reply With Quote
Old 09-15-2013, 02:50 PM   #3
CLOUDSPLITTER "Tahawas"
 
ROBERT CROSS's Avatar

 
2003 25' Classic
Zanadude Nebula , WNY
Join Date: Jun 2007
Posts: 11,153
Images: 1
Thumbs up Complete with new brakes?......yes.

.......As long as everything is working electrically and the shoes are adjusted properly, I would run them until the shoes are properly seated the in the drums. The arc's rarely match perfectly on new components.

You'll probably find the further you go the better they get.

Bob
__________________
PFC.....

ďAfter all these years the reason I continue to love Thanksgiving.....I still sit at the kids table.Ē
RLC

Sandra wanted to go to Cleveland on vacation,
but Iím the Husband, so we went to Cleveland.
RLC
ROBERT CROSS is offline   Reply With Quote
Old 09-15-2013, 04:37 PM   #4
Slide Out Society #001
 
GCinSC2's Avatar
 
2007 30' Classic S/O
Somewhere , South Carolina
Join Date: Apr 2010
Posts: 2,049
Bob,

Do you think the axles came complete with brakes or transfer old brakes?

Either way isn't adjusting a concern? Also seating in, right?

Gary
__________________
S/OS #001
2005 Dodge Ram 2500 5.9L 6 Speed
16" Michelins, Hi Spec Wheels, Max Brake, Carslile Actuator, Equal-i-zer, Dill TPMS. Campfire cook.
GCinSC2 is offline   Reply With Quote
Old 09-15-2013, 06:12 PM   #5
1 Rivet Member
 
1985 34' Sovereign
Livingston , Texas
Join Date: Jan 2009
Posts: 9
Yes, new brakes came with the new axles. Plan is to take it round and round on some back roads tomorrow and do more burn in.
__________________
krohnjs is offline   Reply With Quote
Old 09-15-2013, 06:51 PM   #6
Rivet Master
 
TG Twinkie's Avatar
 
1974 Argosy 26
Morrill , Nebraska
Join Date: Nov 2009
Posts: 5,139
Images: 2
Blog Entries: 5
Once you do the burn in. You may need to readjust the brakes.
__________________
Knowledge: "A gift to be shared. A treasure to receive."
TG Twinkie is offline   Reply With Quote
Old 09-15-2013, 07:09 PM   #7
Rivet Master
 
1988 32' Excella
Robbinsville , New Jersey
Join Date: May 2012
Posts: 1,008
This may be an obvious question, but...

Did you make sure the brakes were adjusted properly?

They may not be adjusted from the factory.
__________________
Wazbro is offline   Reply With Quote
Old 09-16-2013, 09:38 AM   #8
Rivet Master
 
1981 31' Excella II
New Market , Alabama
Join Date: Sep 2011
Posts: 5,648
Also according to Andy, Dexter will put 10" brakes on new axels unless you request 12" brakes which are Airstream Standard. Adjust them and break them in for a while. Are they 12" brakes is the first thing and then go from there.

Perry
__________________
perryg114 is offline   Reply With Quote
Old 09-16-2013, 02:11 PM   #9
3 Rivet Member
 
panheaddale's Avatar
 
1964 26' Overlander
1968 30' Sovereign
Vintage Kin Owner
somewhere , Tennessee
Join Date: Feb 2010
Posts: 211
Burn in? what is burn in? I understand what you all are thinking but from actually being a mechanic you should have brakes from the start if they are correctly adjusted. Jack the trailer up and check the brakes. There should be very slight drag on the brakes when you turn the wheel by hand. If it just spins freely with no resistance at all then they need adjusted. Adjust the brakes up until you can't tun the wheel by hand then back them off until you feel a very slight drag. Take it out and test drive. If the brakes get excessively hot they are still adjusted to tight so back them off just a little more and try again. If you brakes are out of adjustment and not holding no amount of driving around to BURN them in is going to help.
__________________
panheaddale is offline   Reply With Quote
Old 09-16-2013, 02:16 PM   #10
3 Rivet Member
 
panheaddale's Avatar
 
1964 26' Overlander
1968 30' Sovereign
Vintage Kin Owner
somewhere , Tennessee
Join Date: Feb 2010
Posts: 211
You should have brakes from the start if they are correctly adjusted.!If you are shure you are getting power to your trailer brakes 10 inch brake drums are more than adequate to stop the trailer if brakes are adjusted correctly. Jack the trailer up and check the brakes. There should be very slight drag on the brakes when you turn the wheel by hand. If it just spins freely with no resistance at all then they need adjusted. Adjust the brakes up until you can't tun the wheel by hand then back them off until you feel a very slight drag. Take it out and test drive. If the brakes get excessively hot they are still adjusted to tight so back them off just a little more and try again. If you brakes are out of adjustment and not holding no amount of driving around to break them in is going to help.
__________________
panheaddale is offline   Reply With Quote
Old 09-16-2013, 02:45 PM   #11
Rivet Master
 
Condoluminum's Avatar
 
1988 25' Excella
Sunnyvale , California
Join Date: Jul 2003
Posts: 1,858
Images: 13
Send a message via AIM to Condoluminum
Another vote for physically adjusting brakes using ratchet wheel.. Just replaced both axles on our trailer over past weekend <Thanks Vinnie!> and all 4 of the mounted brakes needed adjusting after install.. They will probably need re-adjusting after a couple hundred miles, as new brake shoes wear in and match drums.. Having equal braking at same output voltage of brake controller would be most amazing of coincidences, so I wouldn't worry about that.. If they never get to lockup at any voltage, I'd suspect problems with magnets or wire connections at each wheel, or connector plug..

As for damage from slightly heavier axle ratings, there is a thread on that subject, and I believe the consensus was that slightly heavier ratings (+5-10%) wouldn't trigger problems.. A huge increase in rating might mean much stiffer and could increase trailer vibration levels, though if original axles "petrified" as some get after 20+ years, axles with any flex are going to be an improvement...

Just noticed you have two threads on same subject.. Might want to flag to moderators to combine into one...
__________________
Condoluminum

In Theory, there's no difference between Theory and Practice, but in Practice, there is usually a difference...
Condoluminum is offline   Reply With Quote
Old 09-16-2013, 03:01 PM   #12
Rivet Master
 
wkerfoot's Avatar
 
1979 23' Safari
1954 29' Liner
Orange , California
Join Date: Feb 2005
Posts: 3,667
Dexter will not put 12" brakes on axles with a rating below about 3500 lbs. New Airstreams with axles under that rating come with 10" brakes and 14" wheels.

Bill

Quote:
Originally Posted by perryg114 View Post
Also according to Andy, Dexter will put 10" brakes on new axels unless you request 12" brakes which are Airstream Standard. Adjust them and break them in for a while. Are they 12" brakes is the first thing and then go from there.

Perry
__________________
Bill Kerfoot, WBCCI/VAC/CAC/El Camino Real Unit #5223
Just my personal opinion
1973 Dodge W200 PowerWagon, 1977 Lincoln Continental, 2014 Dodge Durango
1979 23' Safari, and 1954 29' Double Door Liner Orange, CA

http://billbethsblog.blogspot.com/
wkerfoot is offline   Reply With Quote
Old 09-16-2013, 03:04 PM   #13
CLOUDSPLITTER "Tahawas"
 
ROBERT CROSS's Avatar

 
2003 25' Classic
Zanadude Nebula , WNY
Join Date: Jun 2007
Posts: 11,153
Images: 1
Thumbs up

......actually having been a mechanic..... it's not a perfect world and trailer brakes aren't either.
It's very likely, no, most likely, that the shoes do not match the arc the drums. The quickest, easiest and cheapest way to get them to match is to follow the detailed adjustment procedure and then USE them, possibly having to adjust again.
You could machine the drums but that wouldn't necessarily guarantee a fix, and OSHA now frowns on grinding the shoes to match.

Bob
__________________
PFC.....

ďAfter all these years the reason I continue to love Thanksgiving.....I still sit at the kids table.Ē
RLC

Sandra wanted to go to Cleveland on vacation,
but Iím the Husband, so we went to Cleveland.
RLC
ROBERT CROSS is offline   Reply With Quote
Old 09-16-2013, 03:14 PM   #14
Rivet Master
 
TG Twinkie's Avatar
 
1974 Argosy 26
Morrill , Nebraska
Join Date: Nov 2009
Posts: 5,139
Images: 2
Blog Entries: 5
The outside curve of the brake shoe lining is not always the same as the inside diameter of the brake drum. Therefore, when the brakes are applied on a new set of shoes, there will be areas of the shoe that do not contact the drum. Therefore reducing the effect of the brakes.
Once the shoes have worn off the high spots and become matched to the drum, there will be more area of the shoe contacting the drum surface. The more contact area, the more braking.
Don't know where the term "burn in" came from.
The bottom end of the brake shoe always is worn more since the shoes are fixed at the top to a hinge point and open at the bottom when the brakes are applied. The front shoe routinely shows more wear than the back shoe.
The typical drum brake is more effective when braking in the forward direction than when backing.
__________________

__________________
Knowledge: "A gift to be shared. A treasure to receive."
TG Twinkie 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
Shore power requirments for trailers Mrcrowley Generators & Solar Power 21 08-02-2017 06:20 AM
First Time Trailer Buyer Liltrailer 1974 - 1979 Sovereign 3 02-07-2012 10:50 PM
Newbie has power questions Czechitout Electrical - Systems, Generators, Batteries & Solar 2 08-07-2011 05:20 PM
How do you deal with your trailer while exploring? mikescha On The Road... 18 02-21-2011 12:36 PM
A sad end to a wonderful trailer rmk110761 Airstream History 9 02-15-2011 10:12 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 07:35 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.