Reply
 
Thread Tools Search this Thread Display Modes
 
Old 09-17-2015, 09:24 PM   #1
2 Rivet Member
 
2004 28' Safari S/O
pittsburgh , Pennsylvania
Join Date: May 2010
Posts: 51
Help! with one wheel heating

2004 Safari Passenger front axle (dual axle AS) wheel heating up.....Driving me crazy. Lots of details below....

July:

Passenger front axle wheel set TPMS alarm at 190F. Magnet fried, shoes de-laminated.
Road side fix...Put new AP Products assembly on purchased at Camping World

Drove NC to FLA then Home to PA...TPMS temp on that wheel always ran say 10-15 degree hotter maybe 126F tops.

Present:

Several small trips in the hills of PA. Wheel stared heating to 150's noticing smell.

Whats been done:

I am leaving out some details as this has been a long process.... 4 New matched magnets 7k ( new assembly had 7k Magnet and originals were 6K). New brake shoes rear axle. 4 new bearing seals. 4 Bearings cleaned and repacked. Brakes adjusted several times (full out to lock then back off 8 clicks)....even adjusted the hot wheel out another 10 clicks

Electrical testing:

12v at TV plug
1.2 Ohms for both axles (measured at AS plug blue and white pole)
13.7 Amps measured at trailer blue wire from gang box
average 3.4 amps at each magnet
Average 11.4 Volts at each magnet
Tighten ground wires at ground junction in trailer

Hot Wheel testing:
With trailer plug disconnected, continuity to ground on both lines to magnet
With trailer plug connected, 11.4 volts to ground
With trailer plug connected, continuity from metal of magnet to ground but no volts
Nothing binding, springs return
No grease on shoes from bad seal

Just got done with test drive after magnet replacements. With minimal braking mostly highway...hot wheel rose to 132F while other 3 wheels ran around 104F. Easy braking off highway to home hot wheel went to 179 on TPMS.....

Hot wheel spun free at that high temp..no harsh dragging sound either (tested with tire off of the ground). No wobble or play on bearing at low or high temp.
Pulled the hot wheel while hot (ouchy)....with thermal couple drum temp near spindle was about 218 and at the outer diameter 224F


Thinking about replacing hub and drum (may switch it to other wheel and see if other wheel heats up first) Unless someone can say, yep do it this happened to me and it was the drum/bearing.

I think the electrical debugging eliminates a bad ground or bad brake controller. But my experience tells me bad grounds can be tricky. I am thinking it is electrical and that is why the other brake assembly failed.

Could be bad brake material on that new assembly.

Thinking about rebuilding old backing plate

I am at a loss...At the forums mercy...
__________________

__________________
DaKarch is offline   Reply With Quote
Old 09-17-2015, 10:00 PM   #2
3 Rivet Member
 
the ponz's Avatar
 
Detroit , Michigan
Join Date: Oct 2003
Posts: 150
Images: 6
Consider disconnecting the the electrical connection to the magnet on the hot wheel, then drive a short one to two hour run and see what the temps indicate. I would think that by disconnecting the magnet, the problem could be better isolated.
__________________

__________________
86' 31' Sovereign
the ponz is offline   Reply With Quote
Old 09-17-2015, 10:31 PM   #3
1987 Avion 34W owner
 
PaulnGina's Avatar
 
Vintage Kin Owner
Good Ol' , USA
Join Date: Mar 2014
Posts: 1,889
The bearing hasn't been replaced?
__________________
"Long lay the world in sin and error pining
Till He appeared and the soul felt its worth"
1987 Avion 34W
1995 Ford F250 7.3L PowerStroke
PaulnGina is offline   Reply With Quote
Old 09-17-2015, 10:45 PM   #4
2 Rivet Member
 
2004 28' Safari S/O
pittsburgh , Pennsylvania
Join Date: May 2010
Posts: 51
The bearing has not been replaced. Races look good and no heat marks. As well as no play radially or axially.

I would have thought if the heat was coming from the bearing that the drum temperature would have been hotter near the center than at the outer diameter.
__________________
DaKarch is offline   Reply With Quote
Old 09-17-2015, 10:51 PM   #5
Rivet Master
 
switz's Avatar

 
2014 31' Classic
2015 23' International
2013 25' FB International
Apache Junction , Arizona
Join Date: Sep 2012
Posts: 4,799
Images: 8
Wonder if it was a dragging brake shoe from a weak spring?
__________________
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC

TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell

2014 31' Classic model 30 twin beds, 50 amp service, 900 watt solar system, Centramatics, Dill TPMS, disc brakes, 16" tires & wheels
switz is offline   Reply With Quote
Old 09-17-2015, 11:21 PM   #6
2 Rivet Member
 
2004 28' Safari S/O
pittsburgh , Pennsylvania
Join Date: May 2010
Posts: 51
New backing plate = New springs. Solid return when manually manipulating the actuating arm.

Also spins freely at the high temperature. no dragging and no binding
__________________
DaKarch is offline   Reply With Quote
Old 09-18-2015, 07:39 AM   #7
1987 Avion 34W owner
 
PaulnGina's Avatar
 
Vintage Kin Owner
Good Ol' , USA
Join Date: Mar 2014
Posts: 1,889
You know what??? As easy as those assemblies are to remove and install (once the trailer is supported), I think I would swap the entire brake/backing plate assembly with the other wheel, then see where the heat is.

Might try disconnecting the magnet first, though, as was suggested. Probably the easiest way to isolate.
__________________
"Long lay the world in sin and error pining
Till He appeared and the soul felt its worth"
1987 Avion 34W
1995 Ford F250 7.3L PowerStroke
PaulnGina is offline   Reply With Quote
Old 09-18-2015, 09:26 AM   #8
Rivet Master
 
richinny's Avatar
 
2011 34' Classic
Westchester Cty.NY , / Miami FL
Join Date: Jul 2007
Posts: 3,122
are the backing plate assemblies on their respective (left/right) sides?
__________________
Ricky
2012 F150 Super Crew 5-1/2' bed Ecoboost 4x4 3.73 elec. lock diff. Propride hitch
give life. kidney & pancreas transplant 9/9/06
Ingrid-my unofficial '"World's Oldest Streamer" 1909-2008 R.I.P.
richinny is offline   Reply With Quote
Old 09-18-2015, 09:42 AM   #9
2 Rivet Member
 
2004 28' Safari S/O
pittsburgh , Pennsylvania
Join Date: May 2010
Posts: 51
Correct backing plates on all 4 wheels.
__________________
DaKarch is offline   Reply With Quote
Old 09-18-2015, 09:47 AM   #10
Rivet Master
 
r carl's Avatar
 
Vintage Kin Owner
Lin , Ne
Join Date: Dec 2009
Posts: 2,056
Quote:
Originally Posted by the ponz View Post
Consider disconnecting the the electrical connection to the magnet on the hot wheel, then drive a short one to two hour run and see what the temps indicate. I would think that by disconnecting the magnet, the problem could be better isolated.
Yes, that is the first thing to do now. Process of elimination.
__________________
The higher your expectations the fewer your options.
r carl is offline   Reply With Quote
Old 09-18-2015, 09:50 AM   #11
Rivet Master
 
1988 25' Excella
1987 32' Excella
Knoxville , Tennessee
Join Date: Oct 2010
Posts: 2,163
Blog Entries: 1
"No wobble or play on bearing at low or high temp."

There should be just a little play in the wheel when the bearing is set right. A too tight bearing can heat.

My guess is a dragging brake shoe for some reason.
__________________
Bill M. is offline   Reply With Quote
Old 09-18-2015, 11:15 AM   #12
2 Rivet Member
 
2004 28' Safari S/O
pittsburgh , Pennsylvania
Join Date: May 2010
Posts: 51
Setting taper bearings is simple....after repacking, put a little pre load on...spin wheel. loosen, repeat....final set - Turn snug, back off one notch in castle nut. Same process for all wheels, no excess heat in the other 3.
__________________
DaKarch is offline   Reply With Quote
Old 09-18-2015, 11:20 AM   #13
2 Rivet Member
 
2004 28' Safari S/O
pittsburgh , Pennsylvania
Join Date: May 2010
Posts: 51
By the way...I appreciate everyone's replies!
__________________
DaKarch is offline   Reply With Quote
Old 09-18-2015, 11:27 AM   #14
Rivet Master
 
Al and Missy's Avatar

 
2002 30' Classic S/O
Melbourne Beach , Florida
Join Date: Nov 2013
Posts: 2,321
I presume your voltage readings are with brake pedal depressed. What are they without the pedal depressed?

Al
__________________

__________________

"You cannot reason someone out of a position they have not been reasoned into"

Al, K5TAN and Missy, N4RGO
2002 Classic 30 Slideout
S/OS #004
2013 Dodge 2500 Laramie 4x4 Megacab Cummins
2001 Safari 25 RB Twin (Gone, but not forgotten)
WBCCI 1322, TAC FL-39, AIR 82265

Al and Missy 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
Help! One wheel locks up while backing up trailer shiva-shantz Electrical - Systems, Generators, Batteries & Solar 13 06-09-2014 12:08 PM
Need help - water heater not heating water kayt Water Heaters, Filters & Pumps 14 10-27-2012 07:17 AM
electric floor heating remcolent Floor Finishes 6 11-11-2003 04:12 PM
Mister Heater/cheap heating options? Dave Cole Furnaces, Heaters, Fireplaces & Air Conditioning 5 12-14-2002 03:03 PM
Refrig. Heating Up rroessler Refrigerators 15 08-07-2002 06:46 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 02:45 AM.


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.