New version of RCK60-21Z side pulley not the same?

NorthLAredneck

New member
Jul 22, 2019
1
0
0
Bastrop, Louisiana
We had a pulley key fail and ruin a side pulley on our ZD-21 mower. The deck, after much deliberation over a worn out model number stamp, is a RCK60-21Z.

The part number for this pulley, and for side pulleys on most decks, is K5651-33580.

We've confirmed this online and at the dealership repair shop.

HOWEVER, the new pulley that we received and all of the pulleys available that we can find with that number are not the same as the original pulley.

The bore diameter is too small, and the bottom of the pulley is missing the recessed area that fits over the bearings to protect them from dirt and grime.

We've been searching scrap yards (to no avail as diesel kubota mowers last too darn long) and are going on a journey to a Kubota guru up north tomorrow for advice.

Anyone have a clue as to what is going on or any advice on how to get this fixed?

Why did the part number stay the same, yet the actual part configuration change?

We've had lots of rain this year and the jungle looms.
 

lugbolt

Well-known member

Equipment
ZG127S-54
Oct 15, 2015
5,501
2,208
113
Mid, South, USA
Is it an RCK60-21Z or is it an RCK60P-21Z? There is a difference, and that might account for the pulley difference. I've not seen any RCK60-21Z decks; everything around here are P decks which are built 100x better, ya know, for those who can't resist running over basically everything, trees, rocks, driveways, highways, etc.