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.
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.
Cat,5X4 and a good cigar now we're hauling
And my overload permit starts after sunset.
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.
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.
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.Originally Posted by Will Musser
Cat,5X4 and a good cigar now we're hauling
And my overload permit starts after sunset.
Where are the Mythbusters when you need them?
Amen! You know,maybe if we could get a bunch of our members to e-mail them, we might see it.Where are the Mythbusters when you need them?
This is not a soot thread but still, any idea on new tech for less soot?
we once delivered a brand new 3800 madill shovel from eugene ore. to madills shop in kalama after my driver dropped off the machine the service manager called me to ask if we had taped the exhaust I told him yes he had,and that crumpled up ball of duct tape laying on the ground where the machine had been unloaded was the only thing that saved us from having to replace the turbo that took a dump after the machine was walked off the trailer. conclusion - TAPE IS CHEAP
Not trying to argue but ive personally seen it happen. We pulled a motor out of a combine, put it on the back of a service truck exhaust side of turbo forward and hit the freeway with nothing covering the turbo. At between 40-45 mph the turbo DID start to spin, spun for three hours back there. Not sure if it would hurt it but i will always cover a forward facing exhaust, water isnt good inside an engine an duct tape is cheap. Call it what you want but thats just my experience
I taped or put a sock (bag with a bungie) on evrything that look me out of city limits. Reason, very little effort for peace of mind. muzy
i have heard that it happens. i have never seen it happen. could it somehow be that the intake side could see air pressure and spin the turbo? just a thought. get those dam mythbusters on the job.
Yair...Allis HD21's had no muffler and a curved forward facing six or eight inch exhaust. I heard the story back in the 'sixtys that the turbo could "windmill" on the float. Out of curiosity I checked it out by removing the concertina hose from the aircleaner on a couple of occasions when we got onto bitumen. I can report that at speeds of up to 32 MPH (as fast as the Mack would go)there was NO indication that the turbo would spin...that-is-to-say even giving it a flick to start rotation made no difference.
I do believe that extended trips on wash board roads MAY hasten turbo failure due to chattering of the shaft. Large turbo's used on low speed diesels such as Lister-Blackstones and English Electrics were fitted with a devise to lock the rotor during transit.
Just as an interesting aside. Turbo's run hot. There are not many applications where a 'dozer engine runs hour after hour at WOT and full load...scrub pulling is one and at night the turbo's on those old 21's would glow white hot/translucent and you could actualy see the rotation of the turbine through the iron casting...I have seen the same thing with a D343 in a trawler.
I've been hauling equipment for about 8 years now and I wanted to find a good alternative to duct tape, rags, tennis balls, coffee can, safety cones, buckets, hardhats, plastic bags and whatever else I could get my hands on to cover the turbo. I thought it sounded foolish but I complied because of fear of being fired or yelled at by a customer for not covering his turbo. (For whatever reason he may feel it need to be covered) I decided to make an easy to use vinyl cover and I call it a turbo barrier.
It comes with a small rubber tarp strap and is marine vinyl to withstand the weather! Check it out at Turbobarrier.com! Keeps customers happy (which is the name of the game) and is easy to use!
Yair . . . . TurboBarrier It's strange you should bring this up. I have noticed several machines lately with taped up exhausts on floats . . . when asked the drivers very seriously told me it was to stop the turbo's windmilling!!
I thought this B/S had been put to bed years ago. They'rs plenty of good reasons to cover a stack with your neat little doovery but spinning turbo's is not one of them.
Cheers.
Whether it does or doesn't spin the turbo, covering the exhaust keeps customer quiet and liability off the trucker. It also surprises me how it seems that many people don't realize camshafts have valve overlap where intake and exhaust are open at the same time, albeit only slightly.
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