NH TC45D No start. Single Click/Clunk and nothing. Seized Engine?

[Dman1981]

It is a hydrostatic.

Talked to the local dealer, rough estimate of 15-20k to repair if they have to split the tractor and rebuild the engine.

Damn that’s a lot of money
How much a good used or rebuilt engine maybe shop around
Sounds crazy I overhauled some cat
And Cummins that were less than that

 

[jacksork]

Been calling around. There is a shop semi local that would rebuild for ~$6500-ish depending on what else it needs. I would just need to drop off the engine.

 

[jacksork]

Crankshaft broke and the bearing was chewed up. Other than that the mechanic said everything was in pretty good shape and wont need to do much machine work wise. Will replace/rebuild what should be while it is disassembled.

 

[etpm]

Man, that sucks. Any idea why the crankshaft broke? Was there oil starvation? Or just bad luck? A cranky crank? Thanks for letting us all know what the problem was.
Cheers,
Eric

 

[jacksork]

Man, that sucks. Any idea why the crankshaft broke? Was there oil starvation? Or just bad luck? A cranky crank? Thanks for letting us all know what the problem was.
Cheers,
Eric

He wasn't sure. Said he'd never seen a crankshaft break where it broke. You can see discoloration in the pictures above the break. One other section of the crank had the same discoloration, but everything else looked as it should and the bearing surfaces weren't that bad either.

Mechanic also mentioned that someone had been in the engine previously, but other than that he wasn't sure.

 

[Dman1981]

What did radius look
Like on journals if they are not tapered when cut or ground will create a shear point and snap
We had a machine do a few cranks for us years ago all of them broke

 

[etpm]

He wasn't sure. Said he'd never seen a crankshaft break where it broke. You can see discoloration in the pictures above the break. One other section of the crank had the same discoloration, but everything else looked as it should and the bearing surfaces weren't that bad either.

Mechanic also mentioned that someone had been in the engine previously, but other than that he wasn't sure.

Thanks for the reply, I'm sure I'm not the only person who was interested in the cause of the failure. You must be frustrated to not know the reason and if there is a way to prevent a broken crank in the future.
Thanks Again,
Eric

 

[KWentling]

I have heard of a worn out/failed harmonic balancer causing broken cranks. I don't know if that engine has one or not but if it does I'd take a close look at it and if in doubt just replace it.

 

[jacksork]

What did radius look
Like on journals if they are not tapered when cut or ground will create a shear point and snap
We had a machine do a few cranks for us years ago all of them broke

Not sure what you are referring to when you say "radius"? Can you clarify?

 

[Dman1981]

When a crank is turned, at the edge of rod and main journals it should
Be like picture lots of you tube videos also
Same
Goes for when it is bored for sleeve cut for sleeve recess cannot be square cut other wise sleeve will crack and get sucked into pan
Experience talking. Hate doing stuff twice and finding machine just goes oops