Case 450 Dozer

[skyking002]

Disclaimer: I have zero diesel knowledge but love a good project. My neighbor has a 450 that has sat for years. I rebuilt the starter and put on a new battery. The combination is unable to turn the engine over. I’m afraid it may be seized. Any suggestions on freeing the engine? I tried a bar on the fly wheel and put as much pressure as I could before fearing breaking off a tooth.

 

[rScotty]

IMHO, that pry bar on a flywheel tooth method only works if everything is real free. With just a little bit of "stuck", It's almost impossible to turn an engine with leverage on a flywheel tooth without breaking something. But before going any farther it needs to be verified that the engine is stuck fast....or not

Can you get to the front crankshaft nut? A socket on that nut is the preferred method. Or some front pulleys have a hand crank provision to turn them. Either one will give you enough leverage with body weight on a 3 or 4 foot cheater to rotate the crank. It is worth the effort to find a tool for doing that, because if it is stuck you are still going to have to rock the crank even after putting penetrating oil in the cylinders.

I'd somehow assumed that the starter was known to be able to spin the engine. But if the crank does rotate with a socket on it, that says something about the starter as well.
luck,
rScotty

 

[crazyal]

My 450 has the hydraulic pump mounted to the front of the engine. You may need to remove it to make sure it's not seized. With it removed you may be able to get on the front of the engine to try and turn it over. I would take a close look at the tracks and rollers before spending too much time on it. My dozer has sat for years simply because I don't use it enough to spend the money to replace the undercarriage.

 

[Hay Dude]

My 450 has the hydraulic pump mounted to the front of the engine. You may need to remove it to make sure it's not seized. With it removed you may be able to get on the front of the engine to try and turn it over. I would take a close look at the tracks and rollers before spending too much time on it. My dozer has sat for years simply because I don't use it enough to spend the money to replace the undercarriage.

Very sane advice, crazyal.

 

[skyking002]

My 450 has the hydraulic pump mounted to the front of the engine. You may need to remove it to make sure it's not seized. With it removed you may be able to get on the front of the engine to try and turn it over. I would take a close look at the tracks and rollers before spending too much time on it. My dozer has sat for years simply because I don't use it enough to spend the money to replace the undercarriage.

Thanks for the advice on the pump. The undercarriage looks good. Is there a nut behind the pump that I can get a socket on?

 

[Sawyer Rob]

Does this 450 have the 188 or the 206 (I think it is) engine?

I wish I had remembered to ask this important question in my last post!

SR

 

[thepumpguysc]

207..
If u can get the mdl # off the inj pump name plate, I can tell u..

 

[skyking002]

I’m almost certain it’s a 188 not a 207. Will confirm today.

 

[Sawyer Rob]

I've seen this a several times before, 188's in a dozer are rod throwers. There's no known cure that I've ever heard of, and it's a common problem with them.

Most who have a 450 and want to use it, change the engine out to the 207, which has the reputation of being a VERY GOOD diesel.

All later straight 450's have the 207's in them, including mine. I would not put even one penny in a 188 diesel!

SR

 

[skyking002]

207..
If u can get the mdl # off the inj pump name plate, I can tell u..