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Fernie 06-25-2012 09:01:57 162.107.240.253 Report to Moderator	Guys, I have a 1150 Case crawler, I was doing some landscaping this weekend and I lost hydraulic pressure to the transmission. I can lift and move the blade but the crawler will not move forward or in reverse. I changed the paper filter and washed out both screen filters, (in the tank and the screen under the floor board) now it will move and back for about 5 min of work then all pressure is lost again. I can shut it down wait for about 15 mins then start it back up and it will go again for another 1 to 5 mins? I did find a lot of metal filings in the screen filters and the two relief valves work freely. What could be the problem? Any ideas? [Reply]   [No Email]
george md 06-26-2012 16:26:07 209.213.167.201 Report to Moderator	Re: operating a case 1150 dozer in reply to Fernie, 06-25-2012 09:01:57   Fernie, I have several 1000 case crawlers. The 1150 uses the same transmission , but the charge pumps are different. It sounds like you are loosing the pilot bearing or bushing inside the torque converter that carries the output shaft,this permits the two halves of the torque converter to rub together . Check to see if your metal particles are steel or aluminum.If aluminum , it will be the torque converter. If steel ,it would have to be something serious in the trans which rarely happens. The fact that it runs and quits , says that the suction filter for the trans is full of metal,and when you shut it down the metal falls down out of the filter , when you run it picks it up again. Had that happen on my dozer many years ago, when it lost the bushing in the converter. In the old ones the bushing is NSS , so I made one , been running for 35 years since. george   [Reply]  [No Email]
NCWayne 06-25-2012 11:24:24 69.40.232.132 Report to Moderator	Re: operating a case 1150 dozer in reply to Fernie, 06-25-2012 09:01:57   Sounds like either the transmission pump has gone out, or one or more of the piston seals on the transmission clutch packs have blown out. Both will cause the pressure to drop. Usually a piston seal will cause one direction, or gear, to stop working while the pump causes everything to stop. In this case it sounds more like the pump, to me, than anything but the only way to know for sure what the problem is will be to pressure check it. Unfortunately I've never worked on one of those so I don't have a clue where to tell you to look for the guage ports to check it. Good luck.   [Reply]  [No Email]