[Dan Vanderwell]

I’m rebuilding an iveco 12.9 out of a T9050. It broke a valve stem due to the guides being worn so bad the head of the valve was wearing into the liner. Only 8000 hours.

So far I’ve got the head done and my block and crank check out. I’m able to find pistons, liners, oil pumps, water pump, rod bearings, head and main bolts.

Right now my only hang up is a set of red -.254mm (-.010”) main and thrust bearings. CNH is showing a 14 week back order and won’t even give a price. I am waiting to hear if any dealers have a set in stock but not holding my breath. I have a few inquiries in at European parts suppliers that sound promising.

Just wondering if anyone had a set laying around by chance.
6 of 2997415 red -.254 main bearing
1 of 2997417 red -.254 thrust bearing

Thanks.

 

[MF cowboy]

No clue on finding bearings.
But you are a lot braver than I would be putting in a cut crankshaft.

 

[Dan Vanderwell]

No clue on finding bearings.
But you are a lot braver than I would be putting in a cut crankshaft.

I bough this unit at an estate sale a year ago. It was”rebuilt” 2k hours ago. It has original pistons and liners and appears nothing had been done to the top end judging by the valve guide wear. I got it cheap enough to allow for a “surprise”.

As best I can figure is that was when the crank was ground. I had it magnafluxed, checked for straightness, journals measured in spec and only needed a light polish. The bearings have a date code of 2018 which would make sense.

I can’t say I have any reservations about putting it back in. A new one is ~$12k and I’m not sure about availability.

 

[radar]

I bough this unit at an estate sale a year ago. It was”rebuilt” 2k hours ago. It has original pistons and liners and appears nothing had been done to the top end judging by the valve guide wear. I got it cheap enough to allow for a “surprise”.

As best I can figure is that was when the crank was ground. I had it magnafluxed, checked for straightness, journals measured in spec and only needed a light polish. The bearings have a date code of 2018 which would make sense.

I can’t say I have any reservations about putting it back in. A new one is ~$12k and I’m not sure about availability.

Check out Sunset diesel on the West end they were able to get me a whole engine kit for my 855 for 1800$, pistons ,rings,liners, all bearings and a complete gasket set.. Great people

 

[MF cowboy]

I can’t say I have any reservations about putting it back in. A new one is ~$12k and I’m not sure about availability.

All I know is every Perkins crank we ever had ground broke and never made it off the shops 1 year warranty and they all passed the magnaflux test.
It is why I get extremely nervous when someone cuts a diesel crank.
Same thing years back new cranks were $5000 which was big $$ for what you got.
Maybe other brands are more robust lets have positive thoughts here.

 

[lanwickum]

Can you find a new crank? I would be looking in that direction. If you can find the bearings to fit it.

 

[jvw]

Is there anything wrong with the existing main bearings, if they only have 2000 hours on them?

 

[dumbfarmer]

Are you hiring a dealer to help put the thing together. Iveco has very tight tolerances and if crank ever lets go I believe crate motor will be close too 100 grand minimum

 

[MF cowboy]

It is hard to argue with success this crankshaft has run 2000 hrs after cutting if there was an issue it should have showed with magnaflux. Maybe a little off the mains will survive?
My luck is zero with diesels and cut cranks just saying.

 

[Dan Vanderwell]

Check out Sunset diesel on the West end they were able to get me a whole engine kit for my 855 for 1800$, pistons ,rings,liners, all bearings and a complete gasket set.. Great people

We’ve been dealing there for probably 15 years as bd agree that Blaine is awesome. Finding a cat or Cummins kit is a piece of cake and cheap in comparison.

I tried several other places and I actually ended up becoming a reliance dealer and ordering pistons, liners, gasket kit and rod bearings through them.

They just can’t get undersize main bearings unfortunately.

 

[Dan Vanderwell]

All I know is every Perkins crank we ever had ground broke and never made it off the shops 1 year warranty and they all passed the magnaflux test.
It is why I get extremely nervous when someone cuts a diesel crank.
Same thing years back new cranks were $5000 which was big $$ for what you got.
Maybe other brands are more robust lets have positive thoughts here.

Which Perkins models were you working on?

I’ve put a ground crank in a 3406 and JD 466 with no issues. I’ve also had a JD 7.6 crank straightened. Probably jinxed myself after saying that though. If the correct journal radius has been maintained I can’t see removing 0.010” causing an issue but I’m certainly no engineer.
I’m always open to different thoughts and ideas though.

 

[Dan Vanderwell]

Can you find a new crank? I would be looking in that direction. If you can find the bearings to fit it.

The standard bearings are available. A new crank is about $12k and I think is available but haven’t checked. I’m kind of keeping that or a good used one as a last resort.

 

[Dan Vanderwell]

Is there anything wrong with the existing main bearings, if they only have 2000 hours on them?

They show some scuffing and one has a small piece of debris embedded in it. If I could just roll a new set in later I’d have no issue reusing these in the mean time. In order to replace the mains you need to pull the engine, remove the rear timing housing and flip the engine upside down. In all honesty I rebuilt a JD 7.6 with 15k hours that the bearings looked in similar shape. Maybe I’m worrying about nothing but I hate doing a job twice.

 

[MF cowboy]

Which Perkins models were you working on?

All of the Perkins diesel cranks broke that were cut didn't matter whether it was a turbo 6354 or a 6372 or a v8540 all of them broke. Didn't seem to matter if the journal was discolored from a spun bearing or not, every one broke on warranty.
So after the shop ate about 4 or 5 engine jobs absolutely no more ground crankshafts was shop policy.
All of those cranks were magnafluxed and passed inspection.
The av8540 our shop didn't do originally a neighboring dealer did but I got to repair the carnage on that one and it was nasty snapped up at the front every pushrod, valve, piston, even the rocker shafts got bent it was a terrible deal.

 

[lanwickum]

$12K for a crankshaft. Doesn't seem long ago that bought a complete engine. I still believe I would go that route. You said you did the tractor cheap enough?

 

[MF cowboy]

They show some scuffing and one has a small piece of debris embedded in it. If I could just roll a new set in later I’d have no issue reusing these in the mean time. In order to replace the mains you need to pull the engine, remove the rear timing housing and flip the engine upside down. In all honesty I rebuilt a JD 7.6 with 15k hours that the bearings looked in similar shape. Maybe I’m worrying about nothing but I hate doing a job twice.

Scuffing at 2000 hrs on main journals? That seems unusual to me most engines with that low of hours should look virtually no wear at all on mains, rods on the other hand would usually show some wear.
Again that somewhat depends on the engine example 3208 cat it was common for the crank bearings to be worn right out at 2000 hrs in a 4 wheel drive tractor application where as in a combine or truck they lasted a lot better.
Kind of makes me wonder what happened to this crankshaft originally that it was cut?
Has the block been align bored sometime previous or at the minimum checked?