L600 Rounder drive

[kenfen]

I have a L600 and having problems with drive sprocket on rt side sliding off spline shaft.I replaced roller chain thinking there was too much slack. It did same thing as before. Any ideas would be greatly appreciated!!

 

[antfarmer2]

What is supost to hold it on if is press fit maybe a little locktight for bearings will do

 

[kenfen]

What is supost to hold it on if is press fit maybe a little locktight for bearings will do

I also wonder what holds sprocket on. In the schematic it shows no bolt and washer holding it on. I'm wondering if it just floats on the shaft?? maybe the hyd. motor mount needs to be moved?? Any info would be greatly appreciated!! THX!!!