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Are the rear hubs suppose to turn freely?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by JStrenk, Apr 16, 2015.

  1. JStrenk

    JStrenk Active Member

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    I had a caliper seize on the driver rear side that messed up my rotor. After pulling it off I noticed that the hub took considerable force turn it.

    I figure that if Toyota went through all the effort to put springs in the brake pad to keep them from dragging, the hub should at least turn freely.

    I'm worried that the heat generated by the dragging brakes might of damaged the bearings.
    Or is this just me being a one time Fiat owner nervousness.
     
  2. qdllc

    qdllc Senior Member

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    If your parking brake is not engaged and the wheel is off the ground, it should turn relatively freely. That is, if you try to hand turn it, without the wheel mounted, it may spin 1/4 turn before stopping. That's normal of properly set brakes.
     
  3. JStrenk

    JStrenk Active Member

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    OK, there is nothing connected to it. Not even the rotor is on at the moment. I have to apply a constant force to move it.

    I'll compare it to the other side tonight. I'll see how that one works.
     
  4. cyclopathic

    cyclopathic Senior Member

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    that is likely the case. And unfortunately you'll have to replace the hub assembly, it cannot be taken apart.

    Had to replace one a couple years ago - was a $250 in parts.
     
  5. ETC(SS)

    ETC(SS) The OTHER One Percenter.....

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    How's your fuel efficiency?

    The easiest way to determine if you're dragging a foot is to feel the hubs after a drive.
    If you're generating enough heat to damage bearings, you'll know it.

    Good luck!
     
  6. Mendel Leisk

    Mendel Leisk Senior Member

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    It does not sound good that the hub takes considerable effort to turn. I'd vote replace.

    I had rear brake problems, and suspect it was due to incorrect piston alignment. We'd had the rear axle replaced after an accident, and maybe that's when it happened. The inner pads have a pin that needs to be between the spokes on the piston face.

    The first time I reassemble ours I didn't realize and get it right, had the pins riding onto the spokes. The wheels took strong effort to turn, not good. Figured it out.

    Capture.JPG

    This might be the issue, or seizing caliper pins.
     

    Attached Files:

  7. JStrenk

    JStrenk Active Member

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    I was waiting for summer weather to pop me back up into the 50 to 60 on my drive to work but stayed down around 40-45.
    Not typical for my car for the past 4 years.

    I felt the wheels and they were hot to the touch.
     
  8. JStrenk

    JStrenk Active Member

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    Mendal, never though of that pin having to line up. Make sense though. I'll check it tonight

    However the hubs were hard to turn with nothing, not even the rotor, on the hub.
    Attaching the wheel might give it some inertia to keep it moving.

    And thanks for the instruction manual on the brakes.
     
    #8 JStrenk, Apr 16, 2015
    Last edited: Apr 16, 2015
  9. Mendel Leisk

    Mendel Leisk Senior Member

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    Yeah, with everything off, even the rotors, does not bode good that it's still hard to turn.

    As a stop gap you can screw the rotor in (clockwise) a slight amount as need, to achieve alignment, with something like offset tip needlenose pliers. Better is one of these. They're readily available, for probably for about $5 in the States:

    Capture.JPG
     
    #9 Mendel Leisk, Apr 16, 2015
    Last edited: Apr 16, 2015
  10. wjtracy

    wjtracy Senior Member

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    My inspection guy had a bear of a time getting the rear brakes exposed for inspection. Could not get the drums off.
    I reported this here a few months back.
    He said someone over-tightened but I have not had any service ever. Shoes/Pads still OK.
    Makes me wonder if he ever checked them before in prior years (he tried to get out of it this year until I insisted).
    The rear wheels would not spin freely ...I am at 140k miles
    He loosened them up
     
  11. Mendel Leisk

    Mendel Leisk Senior Member

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    That's one reason for regular brake inspections: even if they're not overtorqued: if the caliper bolts have not been removed in 100,000 miles, they're going to be grumpy.
     
  12. cyclopathic

    cyclopathic Senior Member

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    they should be.. lift rear wheel off the ground, release parking brake and you should be able to rotate wheel with light effort (and without grinding noises).

    OEM could be expensive $200+. I think this aftermarket should fit:


    to OP: the OEM replacement hub 176$, aftermarket cheaper:

     
  13. cyclopathic

    cyclopathic Senior Member

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    Priuschat is screwing links.. I replaced with item #s
    "http://www.amazon.com/Prime-Choice-Auto-Parts-HB612219/dp/B00NQAD21K"
     
  14. JStrenk

    JStrenk Active Member

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    Just an update, the passenger side would spin for about 14 revolution with everything (wheel, brake pads, rotor) attached. the driver side would only turn about 5 revolutions. But it's hard to know if the same force is being applied but you can feel the drag on one and not the other.
    Checking with a dial caliper, there was no play in either bearing.

    When I replace the caliper pin, I'll check again with a torque wrench.

    It's nice to be back up to 50 MPG's again.

    That brake tool works nice by the way.
     
  15. cyclopathic

    cyclopathic Senior Member

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    So was it a hub or brake? What did you do?
     
  16. JStrenk

    JStrenk Active Member

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    It started out as a brake job, having to replace the rear brakes because of a seized caliper rod. When I had the brakes off, I discovered the hub on the driver side is also dragging. Comparing one side to the passenger side, the driver side hub had a lot more drag.
    I'll be replacing the hub soon.
     
  17. cyclopathic

    cyclopathic Senior Member

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    This happens often: when brake drags the rotors overheat and kill hub. Also rotor is likely warped too - you need new one.
     
  18. JStrenk

    JStrenk Active Member

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    Well the brakes froze up again! :(
    the pin the caliper floats on was froze up causing the caliper to remain fixed in position. Out side of the rotor was severely pitted and rusted because the pad never touched the rotor. Dealer spent 4 hours fixing the problem although he only charged me for 2 hours. Somehow they had to press the pin out and then resurfaced the rotors. yada yada yada

    When I replaced the pads and rotor last time I grease the pins up and made sure it worked freely. But the bearing was replaced (under warranty :) ) so I assume the mechanic had to take it all apart again. Is there something he could of done that allowed it to freeze up so fast? The rubber boot looked intact and seated properly (yes, they let me look at the car to see the problems).

    Also my rear struts are leaking $650.. but that is also covered warranty. :)
     
  19. Mendel Leisk

    Mendel Leisk Senior Member

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    What lube did you use on the caliper pins?
     
  20. JStrenk

    JStrenk Active Member

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    I used high temperature bearing grease. I was thinking about using locktite anti seize but wasn't sure of it's resistance to heat from braking.
    Don't know what the dealerr used if anything.