As far as I know, the dipper stick cylinder was changed from a 30mm dia. rod to 32mm. You would have to measure this with calipers to be sure; eyeballing it with a ruler wouldn't be close enough. Unless your eyeballs are calibrated or something ;-)
The old part number for the complete cylinder is 7K501-32010 and the new part number is 7K501-32020, but these numbers are not stamped on the cylinder. I believe these cylinders are made for Kubota by some outfit in Italy. You might find a number like DE 65/30x495 or DE 65/32x495 stamped on the cylinder if the paint hasn't filled it in. It's obvious which stamped number is for the larger 32mm rod.
