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Covering Exhaust During transtit

Discussion in 'Equipment Moving Questions' started by dozerduded6r, Nov 9, 2010.

  1. dozerduded6r

    dozerduded6r Member

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    Recently purchased a d6r and a 315c. When transporting between farms 30 miles apart, do I need to cover exhaust to keep turbo from spinning and if so why?
     
  2. Lee-online

    Lee-online Senior Member

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    Yes.

    Air flow will enter the exhaust, go through at least 1 open valve and out the intake. The spinning turbo normally rides on a film of oil. this centers the impeller and stops the bearing from wearing. Without the oil pressure of a running engine the impeller can rub on the housing and the bearing could wear some. Sure is safer to tape of bungee a bucket on the pipe.
     
  3. masterwelder

    masterwelder Well-Known Member

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    A coffee cup fits right in our 312 bl exhaust...
     
  4. motrack

    motrack Charter Member

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    I am going to watch this thread. The need to cover exhaust when trucking causes a lot of debate.

    While air may enter a cyl thru a open exhaust valve that cylinder will NOT have a open intake valve to allow air flow out of the cylinder.

    I have seen equipment trucked for years both with and with out the exhaust covered and have yet to see a turbo wasted by trucking uncovered. The turbos I did see the were claimed to have failed from windmilling were high hour engines and from the looks of the intakes were spiting oil for some time.
     
  5. GOINGBROKE

    GOINGBROKE Well-Known Member

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    As motrack said this will be interesting to watch. Whats the difference between hauling uncovered and a 40 mph wind, of which we have plenty of? Don't start very well if you dont uncover the exhaust first, seen that a time or two lol
     
  6. tpitt

    tpitt Well-Known Member

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    Occupation:
    Heavy fire equip operator
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    You both are right. I've hauled tons of equipment and it is an old wives tale.:Banghead Both valves in the same cylinder.would have to be open. If they are you already have major problems.
    Both my brother and nephew are heavy haulers and they are in agreement.
     
  7. DirtHauler

    DirtHauler Senior Member

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    Heavy Highway Dirt Hauler
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    Seattle WA
  8. mitch504

    mitch504 Senior Member

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    One things for sure, if this really worked, I'd never have to buy an air filter. Every time one of my machines left the jobsite, there'd be a cloud of dust out the pre-cleaners.
     
  9. heavylift

    heavylift Senior Member

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    Well the last place I worked... I was told to go move some equipment... Where's bobby...
    the boss seen him hauling a loader without a sock over the exhaust... he's gone...

    OK... so if the boss wants a sock on the exhaust then the boss get socks on the exhaust..

    He signs the check... he gets socks.... whether it works or doesn't work...

    all bobby could say was damm cell phone...the boss took a pic of the truck when he was leaving a job site..
     
  10. mitch504

    mitch504 Senior Member

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    Excellent point heavylift; whenever I or one of my employees transport someone else's machine the exhaust IS taped. The operators manual for one of my CATs actually says that it is not neccessary except to keep debris from entering exhaust, but, if it's not mine, it is taped.
     
  11. DPete

    DPete Senior Member

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    We always cover ours if facing the wind, the argument of wind not circulating thru the engine is valid but it wouldn't take much air movement to turn the impellar either. Doesn't cost much to cover it, I've had several truckers say it's not necessary, all I know is if it's covered it's not going to turn, most of our stacks are turned sideways so we haul uncovered.
     
  12. Tiny

    Tiny Senior Member

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    Hauling for hire I cover nearly all of them....Customer is always right lol and it removes the chance of someone saying "I lost a turbo and Dave is at fault
     
  13. dozerduded6r

    dozerduded6r Member

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    My boss" son is the one moving the eqiupment around without covering the exhaust, but when something happens they blame the operator. ME! As much as these machines cost whats an extra 5 minutes and 2$ worth of duct tape.
     
  14. zhkent

    zhkent Senior Member

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    Kansas
    Exhaust leaks through manifold gaskets, the joints on three piece manifolds, cracks in the manifold, or the turbo to manifold exhaust coupling would allow air movement through the turbocharger.
     
  15. mitch504

    mitch504 Senior Member

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    If so, the underside of your hoods must be black.:) Exhaust leaving the cylinders is under much more pressure than air coming in.
     
  16. 2stickbill

    2stickbill Senior Member

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    I have hauled the Company Equipment uncovered.Never lost a Tubo.I did see one that was said to have been caused by no cover.But the Turbo was Blue on the inside.Running to hot and not letting it cool down before engine is shut off will get them.
     
  17. Deerehauler

    Deerehauler Well-Known Member

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    Most ag equipment (and I suspect construction equipment) has some sort of precleaner aspirator hose, which runs from the exhaust stack or muffler to the intake stack, ahead of the air cleaner. This hose is at least an inch in diameter. If the exhaust stack is pointed into the wind and the stack is acting as a wind scoop, the incoming air will take the path of least resistance. How much air would it take to fill the 1"+ hose, working its way through the turbocharger and out through either bad exhaust manifold gaskets or (grossly misadjusted) valves?

    If your boss wants the exhaust stack covered, he signs the checks, and he gets his way. Is it necessary--NO. Is it hurting anything (other than wasting time and duct tape)--NO. For the record, I have been wrenching, hauling, and operating a fairly wide variety of brands and types of equipment and have NEVER had a turbo fail due to being hauled with an open exhaust stack. This has been my experience--yours may vary.
     
  18. Will Musser

    Will Musser Well-Known Member

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    I'll cover them if I know I'm gonna get in rain on the trip. I just don't like the soot residue blowing everywhere. Otherwise i would rather leave them opem as I usually forget to take the tape off before trying to start the engine. Like Deere said, I't ismainly if the customer asks forme though. Technically it DOES NOT spin the turbo, that is a myth. The open pipe doesn't let enought air in to spin the turbo. If you dont believe me, the next time you have a down pipe off a turbo on a engine, blow on the exhaust fins. It will just sit there. Those fins a designed for the air to go the other direction across them. That is one (of many) reasons that hotside and coldside wheels look different in a turbo.
     
  19. 2stickbill

    2stickbill Senior Member

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    I had a retired diesel mechanic tell me that in diesel training school the instructor used a blow gun and 150 lbs of air pressure.Turbo would not spin.Besides that now you have mufflers that will slow wind speed down.Most or not straight threw.
     
  20. masterwelder

    masterwelder Well-Known Member

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    Where are the Mythbusters when you need them?:)