changing knifes on promark 210

[allen t]

I am still looking for info. on changing knives on a promark 210. I have the lock nuts on the back of the disk removed but the bolts will not come out. I have tryed driving them out,and unscrewing them but they will not moove. Is the disk threaded also where the bolts that go through the chipper knifes screw into the disk and then have lock nuts also or do they push straight through and then have lock nuts on the back ? Thank you.

 

[Forestgnome]

I just looked at the instructions for my Promark 310, and it indicates the bolts are threaded. You remove the locknuts, then unscrew the bolts with an allen wrench. Blade adjustment is .020-.030 clearance with the fixed blade.