turbo owners: caution in transport

[RobJ]

Even if proper shutdown is observed, the standing temp of the oil left in the turbo can reach over 700 degrees Farenheit. At that point, that little skim coat of oil on the bushings, is no longer oil.

Yes, I was exagerating with the 25rpm

700 degrees is while under a full bore load. As soon as you cut the throttle back the temps fall immediatly to under 200. You see this when you run one on a dyno.

And not much oil is left in a turbo anyway, of the ones I worked on the returns were on the bottom, gravity and all. I'm not sure who this helps in the discussion.

I still guess this could happen but it's hard to believe, but if you spin the straight pipe where it faces the rear this would probably be a fix. Mine stays this way so it doesn't hang on a tree limb or vine!

 

[Dargo]

Since I readily admitted earlier that I am by no means an expert in this area I may have taken this thread a bit different than others. Rather than take any side on the issue, I just looked at it as a possible bit of useful advice that was offered only to help people; not stir any argument. So, I again looked through my JD owner's manual and emailed JD to ask them. Well, I was in for a bit of a surprise. My owner's manual I received with the tractor does not match what JD says is in my owner's manual (the manual I received from them with my tractor)!

I'm attaching a copy of what is in my owner's manual as well as what they sent me. The attachment that JD sent me does say to cover the exhaust, but not for the reasons first discussed here. The email from JD said that they advise to cover the exhaust to prevent FOD (as already mentioned here); not to prevent 'pinwheeling' of the turbo. Per John Deere, that does not happen and is not an issue.

So, the bottom line from John Deere is yes, do cover the exhaust when trailering your tractor, but not because of any damage that may be done to the turbo spinning without lubrication. I did ask for them to send me a new manual since my manual did not match what they said was in their manual. Either way, I'll likely cover my exhaust if I think about it to prevent bugs and dirt from entering the exhaust system and getting caught in the muffler.

The first picture is from my manual and the 2nd is the one sent to me by John Deere.

*edit*
I did forget to mention that John Deere strongly advises against using straps of any sort to secure the tractor to a flatbed or trailer. They advise to only use chains. I've already learned my lesson on that issue and would never again transport a tractor on a trailer using straps.

 

[RobJ]

Hehe, they put the tractor on the truck backwards!!

 

[Wayne County Hose]

No, if you are John Deere, the tractor is correct. It's the truck that's backwards.

 

[Dargo]

Don't forget, I didn't make the picture!!

It seems that they went out of their way to make sure that the exhaust is pointed into the wind! Worse yet, I don't see the exhaust covered in the one picture that recommends covering it.

 

[shownuff]

im not sure on the small tractors, but if you call any heavy duty towing company they will tell u why they put duct tape or some kind of cover on the exhaust stack of large diesel trucks when they tow them from the rear...just my 0.02

 

[Reg]

Hehe, they put the tractor on the truck backwards!!

Nope, rear facing is correct.

 

[have_blue]

1 thing to remember is that turbo pinwheeling during transport is because of very light bearing resistance. If the bearings would start to fail (highly unlikely!), or get grit in them, the pinwheeling will immediately stop. So it's a self-limiting process.

 

[Dargo]

Nope, rear facing is correct.

Another thing I don't know.

I was told that loading the tractor backwards is recommended to prevent the tractor from tipping over backwards if going up a steep incline to load on the trailer/truck. I dunno. However, my cab doors open like a regular car door and I have a FEL that makes sure I don't get light in the front when climbing up on my equipment trailer. Therefore, I always load with the tractor facing forward. That way I don't have to worry about one of my cab doors popping open and being ripped off. But, as I said, what do I know...I just don't want to think about buying new doors for my cab.

 

[2Botas]

700 degrees is while under a full bore load. As soon as you cut the throttle back the temps fall immediatly to under 200. You see this when you run one on a dyno.

To be honest, I cant speak very much from experience when it comes to turbo diesels. But one thing i do know is that impeller housing temps on a turbocharged gasoline engine will range from 375-950 degrees depending on engine load. Even with extended idle time the inpeller housing never drops below 350 degrees. And considering diesels run similar EGTs, I cant imagine a diesel turbo running any cooler. I have seen impeller housings hit 1100 degrees under full load using an infrared thermometer. (this was with EGTs of about 1325 degrees, which is higher than you will see in most diesels.) Nonetheless, I dare you to place your hand on the impeller housing on an engine that has been running for at least 10 minutes, idling or not...... You might retract the under 200 degrees figure. If it is under 200 you should be able to touch it for about 2 seconds without burning yourself.

Maybe i will have to give this a test on our M105. See what the infrared says under certain loads... Who knows, i could be 100% wrong. Like i said, I cant speak from experience on diesels. But now i want to find out