Anonymous-0

Well-known Member
I have a two owner 1175 with about 5500 hours. It has cracked the #4 sleeve three different times at 4000, 5000, & 5500 hours. At 4000 and 5500 hours it resulted from the tractor getting hot. Why would the engine crack the same sleeve three times? When I bought the tractor a guy tole me to have the counter bore checked (I think), and the mechanic that rebuilt the tractor the last time said the counter bore (I think) was fine. I havent pulled the piston yet, but the #4 sleeve is marred up, and all of the radiator fluid got dumped into the crankcase so I suspect the sleeve cracked again. The other sleeves look and feel good. What could be causing this. The tractor was hot, and the pump has been turned up...
 
There are a few reasons as to why the same sleeve could be cracked. Counter bores can become cracked or warped. I have seen the sleeve protrusion be the major cause of a cracked sleeve more than once. If your mechanic doesn't know about protrusion get a different one. There are shims used to brink the sleeve up onr the counter bore needs to be cleaned up little so the sleeve will go down a little further. Good luck with it
 
You might ck. if the block has been milled to take care of a warp. I had a 1470 that had this done and it broke the pistons and cracked the sleeves. always a different one. I finally milled some off the pistons and had no more trouble.. What was happening was when it got a little warm the piston would hit the head and mushroom the piston and than that mushroom would scoure the sleeve and than finally crack it and dump the antifreeeze in the oil. About the year you are talking about Case rushed the blocks into production. I am told that the blocks after foundring have to cure for about six months or more. If used too soon will warp. In 1972 or their abouts they rushed them and had a lot of trouble. So much for case being a perfect company...
 

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