Kubota L4330 - Loader bolts missing / threads mashed / stripped threads

SPYDERLK · Jul 9, 2013

Larger bolt needs greater torque in order to apply equal clamping force.

jeff9366 · Jul 9, 2013

Bluegill2 said:
It is a known fact that the loader frame bolts need to be checked routinely when the rig is new. I believe it is mentioned in the owner's manual.

Ahhhhhhh.....maybe the factory knows something. My B3300SU seems to vibrate a bit too. I check the FEL connections to the tractor frame every ten hours, when I grease it.

nvr-enuf · Jul 10, 2013

Does anyone know the Kubota stated torque specifiation for the FEL bolts????????

SPYDERLK · Jul 10, 2013

nvr-enuf said:
Does anyone know the Kubota stated torque specifiation for the FEL bolts????????

Gr10.9 fine thread 16mm should be about 200ft# dry. 18mm fine about 260. About 210-215 on the 18mm should give near the same clamp force as 200 on the 16mm.
larry

nvr-enuf · Jul 11, 2013

Thanks - I choose a FTLB close to that, I was nervous about ripping out the cast iron threads plus hand re-tapping the holes did not provide the same precision of taping as the factory did with fixtures. I used a very good loctite meant for zinc coated bolts - let's hope they don't loosen up again!