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  1. #1
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    Misaligned pulleys question

    I drive a 2007 international 9400i.

    My pulleys on my fan belt are way out of alignment. Just put a new belt on less than 20k miles ago and it's already all chewed up. Truck had also been squealing and chirping quite a bit the last week.

    Im not handy enough to fix it myself, so I'm gonna have to bring it in. Won't have another truck to drive, so I'm wondering the downtime. Is it generally a 1 day job with no parts needed, or do parts generally have to be ordered, meaning more downtime?


    Thanks

  2. #2
    Road Train Member bender's Avatar
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    It may just need a new tensioner and/or idler and another new belt. If that's the case, a day should do it.

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  4. #3
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    Thanks man, hope so. Make an appointment Monday, hopefully it can be done during a reset

  5. #4
    Road Train Member bender's Avatar
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    If you're looking to minimize the downtime you could swing by a shop, have them take a look and identify the cause, then call ahead to the shop you will use for the repair so they will have the needed parts when you arrive. That way you can just wait for the truck when it's being repaired, unless it turns into something more major.

  6. #5
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    Yeah I hear you, problem is I live in western nd and asking someone to look at your truck without an appointment in this oil boom is like asking them to donate you a kidney

  7. #6
    Road Train Member bender's Avatar
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    Oh Ok, I gotcha. What engine? Got any comrades that you run with that are familiar with your setup?

  8. #7
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    Cummins isx.

    Let me get your opinion if this helps out. If I put my winter skirt on, which restricts airflow ( which I shouldn't need to do obviously) the chirping and squealing goes away within a few minutes, but when I take it off it comes back within a few minutes

  9. #8
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    If it's chirping it's like bender says. The belts are wearing from slippage due to a worn tensioner. It's a simple repair. I wouldn't think an hour on labor. I would get the parts he says.

    And/or if you have an obvious misalignment of the belt that means one time or another a wrong part was replaced. The mechanic replacing the tensioner can give you advice on that. It's hard to say from a computer without looking at it. It can easily be remedied with shims and spacers or replacing an incorrect part.

  10. #9
    Road Train Member bender's Avatar
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    Quote Originally Posted by jamin22 View Post
    Cummins isx.

    Let me get your opinion if this helps out. If I put my winter skirt on, which restricts airflow ( which I shouldn't need to do obviously) the chirping and squealing goes away within a few minutes, but when I take it off it comes back within a few minutes
    I would be looking at the fan hub for bearing failure. The way I see this is, when you have the winter front on, the engine fan can't pull hard due to no air supply and would remain in line even with a failing fan hub bear set. When you have the winter front off the fan pulls hard, moving the fan hub and pulley forward because of the failing fan hub bearings which makes the pulley out of line and causes the belt squeal/damage. You can slip the belt off and check the fan hub for bearing play and if you find the problem is the fan hub, order a reman hub ahead of time or a rebuild kit to repair your current hub. Labor is roughly 2.5 hrs to remove and install the hub and an additional 1.0 hr or so to kit the hub so well within a working day.

    I would take care of this right away before you lose the fan hub and it takes out the radiator.

  11. #10
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    Thanks man, I'll get that checked out. Truck actually sounds pretty good so far today, but I'm sure the noise will come back in a couple days, if not later tonight.gonna make some calls in the morning and see where I can get in

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