Hot & cold hubs...

Discussion in 'Tires / Brakes / Bearings / Axles' started by crisnrich, Apr 1, 2009.

  1. crisnrich

    crisnrich New Member

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    We were towing our PUP and pulled over to check things. We noticed the left hub was quite hot. While the right hub was cold to the touch. We didn't notice any pulling. We drove about an hour on the highway with it. Any suggestions on where to start investigating? Thanks.

    Cris & Rich <img src=../Images/icons/icon_smile_camping.gif border=0 align=middle alt="Camping">
    Coreen <img src=../Images/icons/icon_smile_happycamper.gif border=0 align=middle alt="Happy Camper"> & Caitlin <img src=../Images/icons/icon_smile_happycamper.gif border=0 align=middle alt="Happy Camper">
    2004 Ford F150 <img src=../Images/icons/icon_smile_suv.gif border=0 align=middle alt="Tow Vehicle"> & 1991 Palomino Stallion <img src=../Images/icons/icon_smile_pu.gif border=0 align=middle alt="PopUp">

    Edited by - crisnrich on April 01 2009 14:03:32
     
  2. 3pillons

    3pillons Press hard, Five copies.

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    Bearings, bearings, and bearings, the hot one is obviously not lubed, too tight, or even siezed. I just replaced mine last week. They were not running hot at the time, but apparently they had been in the past as the inner race on one side was purple from too much heat. That's assuming you don't have brakes which could also be the culprit.

    Bryan, Pam, Cameron, and dogs Gracie and Piper.
    2008 Dodge Grand Caravan
    1992 Viking
     
  3. crisnrich

    crisnrich New Member

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    Oh yes, I forgot to mention we do have electric brakes on it. I was under the assumption they should run fairly hot. Am I correct in thiking this, or are the hubs supposed to be cold?

    Cris & Rich <img src=../Images/icons/icon_smile_camping.gif border=0 align=middle alt="Camping">
    Coreen <img src=../Images/icons/icon_smile_happycamper.gif border=0 align=middle alt="Happy Camper"> & Caitlin <img src=../Images/icons/icon_smile_happycamper.gif border=0 align=middle alt="Happy Camper">
    2004 Ford F150 <img src=../Images/icons/icon_smile_suv.gif border=0 align=middle alt="Tow Vehicle"> & 1991 Palomino Stallion <img src=../Images/icons/icon_smile_pu.gif border=0 align=middle alt="PopUp">
     
  4. 3pillons

    3pillons Press hard, Five copies.

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    Heat only builds when there is friction. There should be no friction if the brakes are not engaged. Both brakes should operate equally thereby both hubs would be hot if they were sticking. Or only one brake could be malfunctioning causing unequal temperatures. You should be able to tell if it's the brakes easily by removing the wheel and inspecting, a sticking brake drum and shoes will be obviously discolored and glazed. The bearings will be harder to visually see while packed in grease but maybe you can tow it without brakes around the block and see if heat builds.

    Bryan, Pam, Cameron, and dogs Gracie and Piper.
    2008 Dodge Grand Caravan
    1992 Viking
     
  5. crisnrich

    crisnrich New Member

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    Thanks for the help. I'm going to assume it's bearings since we were on the highway & heat built up while not using brakes. Hubby said he'd tear into tomorrow & see what he could find.

    Cris & Rich <img src=../Images/icons/icon_smile_camping.gif border=0 align=middle alt="Camping">
    Coreen <img src=../Images/icons/icon_smile_happycamper.gif border=0 align=middle alt="Happy Camper"> & Caitlin <img src=../Images/icons/icon_smile_happycamper.gif border=0 align=middle alt="Happy Camper">
    2004 Ford F150 <img src=../Images/icons/icon_smile_suv.gif border=0 align=middle alt="Tow Vehicle"> & 1991 Palomino Stallion <img src=../Images/icons/icon_smile_pu.gif border=0 align=middle alt="PopUp">
     
  6. Sub1ime14

    Sub1ime14 Member

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    Cris,

    Just to be clear, you don't have to be actively using the brakes to build up heat from a brake problem. In other words, your brakes could be dragging while you're driving. It may not even be enough to be noticeable to you (i.e. you aren't pulling to one side), but it still can overheat.

    That said, your bearings are the more likely culprit. I would start with them, and if they seem fine, then check out the brakes situation.

    *John Becker & DW Mandy, PA*
    <img src=../Images/icons/icon_smile_pu.gif border=0 align=middle alt="PopUp">'69 Starcraft Stardust
    <img src=../Images/icons/icon_smile_suv.gif border=0 align=middle alt="Tow Vehicle">'91 Dodge Dakota
     
  7. crisnrich

    crisnrich New Member

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    Got it! Thanks John! Will update everyone once we get her opened up tomorrow.

    Cris & Rich <img src=../Images/icons/icon_smile_camping.gif border=0 align=middle alt="Camping">
    Coreen <img src=../Images/icons/icon_smile_happycamper.gif border=0 align=middle alt="Happy Camper"> & Caitlin <img src=../Images/icons/icon_smile_happycamper.gif border=0 align=middle alt="Happy Camper">
    2004 Ford F150 <img src=../Images/icons/icon_smile_suv.gif border=0 align=middle alt="Tow Vehicle"> & 1991 Palomino Stallion <img src=../Images/icons/icon_smile_pu.gif border=0 align=middle alt="PopUp">
     
  8. crisnrich

    crisnrich New Member

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    Also to clear things up more for me, can anyone tell me if there should be any heat in the hubs? Or should they be cold during use?

    Cris & Rich <img src=../Images/icons/icon_smile_camping.gif border=0 align=middle alt="Camping">
    Coreen <img src=../Images/icons/icon_smile_happycamper.gif border=0 align=middle alt="Happy Camper"> & Caitlin <img src=../Images/icons/icon_smile_happycamper.gif border=0 align=middle alt="Happy Camper">
    2004 Ford F150 <img src=../Images/icons/icon_smile_suv.gif border=0 align=middle alt="Tow Vehicle"> & 1991 Palomino Stallion <img src=../Images/icons/icon_smile_pu.gif border=0 align=middle alt="PopUp">
     
  9. Sub1ime14

    Sub1ime14 Member

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    Well, all the grease and engineering in the world won't completely eliminate friction, so they may have a little warmth. I'd say they should be lukewarm at the most. If they're at all describe-able as "hot", then you've got a problem.

    *John Becker & DW Mandy, PA*
    <img src=../Images/icons/icon_smile_pu.gif border=0 align=middle alt="PopUp">'69 Starcraft Stardust
    <img src=../Images/icons/icon_smile_suv.gif border=0 align=middle alt="Tow Vehicle">'91 Dodge Dakota
     
  10. Flyfisherman

    Flyfisherman New Member

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    Of course, when your talking right or left side, it always depends on where your looking at the PU from ... the rear or from the front! (LOL)

    In the case of my little Starcraft, the CURBSIDE hub always runs a little warmer than the ROADSIDE hub(also called driver's side). This always puzzled me as to why and I've posted that question in the past. Every kind of speculation came up but an old curmudgeon ~ fly fishing buddy came up with the most logical answer, he says roads (pavements) are tapered or crowned, sloped toward the curbside, and that hub/tire/wheel gets the most stress. When I replaced the wheel bearings some time ago it was indeed the curbside bearings that had the most wear.

    Fly

    '99 Starcraft Venture
    '02 GMC Sierra
    Black Lab (Molly)
    (14) Flyrods
     
  11. pianewman

    pianewman Ft. Worth, TX

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    To clarify about brakes...you can generate a lot of heat with perfectly adjusted brakes just by stopping at the end of the exit ramp.
    Of course, this doesn't explain one side being "hot" and the other "cold".
    My first few miles of towing I had my brake controller set too strong, and this also generated more heat. Once I backed it down, no more heat issues.
    Yes, my hubs are nice and warm, both driver's and curb side.

    pianewman
    2002 Fleetwood Santa Fe (2550 lbs. loaded)
    2005 Toyota Tundra Double Cab Limited, 4.7 V-8, 4WD, Reese 400 WDH, A.R.E. bed cap
    Scangauge II
     
  12. Raycfe

    Raycfe Waterford Ct.

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    You really don't want to take a chance. Check the bearings as soon as possible, You could lose a wheel. Hot , cold, wet, dry, check the bearings. Something you do not want to fool around with. If everything is OK you will have "piece of mind".

    83 JaycoJay 806, 04 Grand Cherokee, Ray and Jin
     
  13. barb_dave

    barb_dave Active Member

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    I would start with the bearing first as well. Take them out remove all the old grease and inspect them for signs of wear. If you have any doubt just replace the bearing they are inexpensive and well worth the piece of mind.

    I actually have an extra set (inner and outer plus grease seal and grease) in the camper in case one should go bad on a trip.

    http://community.webshots.com/user/Barb_Dave
    <img src=../Images/icons/icon_smile_pu.gif border=0 align=middle alt="PopUp"><font color=red>1998 Coleman Mesa</font id=red>-<img src=../Images/icons/icon_smile_suv.gif border=0 align=middle alt="Tow Vehicle"><font color=green>1997 Plymouth Voyager</font id=green>
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  14. 3pillons

    3pillons Press hard, Five copies.

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    Don't forget the races too. If there is any damage to a bearing, the race would have been affected too.

    Bryan, Pam, Cameron, and dogs Gracie and Piper.
    2008 Dodge Grand Caravan
    1992 Viking
     

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