Tractor Repair: 1070 Case powershift removal, exact serial number, clutch plate

Question
Hi. I now have our 1070 Case tractor split apart and took the c1 clutch and piston out. The c1 clutch plate is broken so I will change that and the piston seals. I am still not sure how to get at the oil distributor rings to change them. There are 2 oil tubes that go into the top of the front carrier plate and are threaded into the cast housing. I can't figure out how to get them out because there is no head of any kind to turn on. Also the book says to disconnect the bolts holding the oil distributor on before removing the powershift. It says to do this the cab platform, valve body and top of transmission have to come off. Can you walk me through the steps the way you would do it? I have never worked on a powershift tractor so it is a learning experience. Thank You.

Answer
Hello,

  How the powershift comes apart depends on the age of the machine.  On the earlier yellow and orange tractors, the transmission top cover and powershift valve had to be removed so that the oil distributor could be unbolted before the powershift could be removed.  On the later white and orange tractors, the powershift can be removed after splitting the tractor without removing the transmission cover or control valve.  It goes by serial number, but I don't know the exact serial number when the procedure changed.  I know it was when they changed the color from yellow to white, but that can be misleading since some older tractors have been repainted and some people decided to paint them white to make them look like a newer tractor.  You can usually tell because sometimes there will be areas that the yellow paint shows where the white has worn off.  If the top cover does need to be removed, it is not necessary to remove the platform.  The cover can be slid out the side under the platform.  It's a 2 person job, the cover is very heavy and hard to handle.  The oil tubes in the front cover can be removed after removing the access plugs on top of the housing.  Earlier tractors had a retainer under the plug that could be removed with an allen wrench and then the oil tube would be loose and could be lifted out.  Later tractors had threads tapped into the top of the oil tubes so that a bolt could be screwed into them to pull the tubes out, because the tubes had o-rings on them which made the tubes tight in the housing.  The tubes are not screwed into the housing.  On the later tractors, After the front cover is removed, remove the 3 allen screws holding the planetary gear carrier and pull the planetary assembly out.  Remove the bearing and snap ring from the shaft and pull the entire powershift out.  The oil distributor rings are on the back of the unit.  The oil distributor will still be inside the housing and can be inspected, and if there are no grooves worn into it, you don't need to remove it.  On the earlier tractors, the oil distributor has to be unbolted through the top cover, and will come out with the powershift unit.  The oil distributor can then be removed from the rear of the unit.