1855 Cummins conversion continues

• 1855 conversion

I have now taken the engine out of my 1855 to replace a badly leaking seal at the back of the over/under shift unit and to replace a leaking o ring on the control spindle on the over/under unit . While I had the engine out I decided to replace the clutch , pressure plate , etc which it definately needed . The tractor had a ceramic (semi metallic) button type clutch which was shot and a pressure plate that did not put out much pressure at all . The question came up when I removed the pressure plate from the flywheel and took the flywheel off the back of the engine . The flywheel I took off the 1855 was not flat across the entire face but had a raised area around the outer edge where the pressure plate bolted . Was your 1855 flywheel this way ? My thinking is that the raised area was created as the old clutch plate wore against the flywheel and I need to have the entire face of the 1855 flywheel polished flat with no raised area on the outside edge . The area where the clutch plate contacts my 1855 flywheel is highly polished and wavey . Thanks . Sam

Sam, both my 1850 and my 1855 flywheels had the raised area where the pressure plate bolts. You can see the 1850 flywheel there in the picture and you can see the raised area around the outside of it. I think that they are supposed to be that way, I dont think that is all from wear. The 1850 flywheel was fairly smooth and in good shape, but like you the 1855 flywheel was wavy and had lots of small cracks across the face. The machine shop said that was normal and they just polished the inside and left the raised area alone. Im not sure if anyone else might know if they are supposed to be that way or not, but mine are.

Someone e-mailed me on this hydro pump issue and told me that Oliver put this pump beside the main Hydro pump on later models and on some of the Whites. I am checking this out now to see if I can put a different pump on it from another tractor. Thanks for the comments