The centre wheel axle (under the jackshaft) has three sprockets in one lump (one joining axle to jackshaft, one to front axle, one to back axle).

I am trying to remove this big sprocket thingy to get the axle out to do bearing replacement. I can't find the set screw/s on it. Does anyone know where on the 'lump' this is?

Also, I have removed the jackshaft for easier access, but still can't see how I'm going to shift the sprocket thingy, even after removing the set screw. Can't fit bearing pullers in anywhere...

Most of you have probably done this before...would appreciate any tips!!

Thanks