Kubota zerk grease fitting size

[Kubota3710]

Post 3 of this fix.

The biggest surprise was the way the grease flows to the bearings. In this picture you can see the grease hole in the front axle support. Grease goes into this hole and supplies the PTO shaft with grease. Push the grease though that hole and the grease fills the space in the middle of the PTO shaft and flows forward into the front bearing and aft to the roller bearing. THis is the hole that got filled up with crud and WHY NO GREASE was getting into the pto bearings.

But the surprise was that this hole does not line up with the grease fitting. it is 180 degrees out. Before you tell me I a nut, the bolt hole pattern is not symmetrical, and there is only one way to install it. SO the grease comes in on the opposite side, and flows around the big groove in the middle. It then goes through that hole into the PTO shaft. Alse grease must flow forward and aft in those grooves, but not sure why as that shaft doesn't rotate. Just the PTO shaft that is inside the front axle support.

So not believing it, I put the front axle support in the tractor and shot grease into it. Sure enough, even those the grease fitting is 180 out from this hole, grease comes though the hole to feed the PTO shaft. Still not believing it I wiped out the grease and did it again. Still the same, so.....

So since the hole 180 degrees from the grease fitting was plugged, and you can't see the hole, I'm not sure how I would have ever prevented this problem. You would have to take it apart to know it was happening.

Thanks for help on tackling this issue. The squeal is gone and the mower is spinning great again. Rich

 

[Kubota3710]

Here is a pic of the G1800 front PTO parts to help get a reference. I called out the pto shaft and front axle support.

 

[Oldpath05]

That was a good read, a nice fix it story, excellent pics. Probably got it fixed none to soon for the grass mowing season.

 

[Coyote machine]

That was a good read, a nice fix it story, excellent pics. Probably got it fixed none to soon for the grass mowing season.

Second that, completely. Hard to imagine one zerk can wreak so much damage when not doing it's job, but no grease on a close tolerance spinning shaft's a disaster waiting to happen.

Excellent description/pics as old path said. Thanks for sharing. Feels good to get it right, yes, after all that...

 

[Kubota3710]

Thanks for the comments. It mowed great for an hour, and then the dynamo froze up. Found a great thread here and fixed that for about $14 of Kutoba bearings. Tractorbynet is a great resource. The G1800 mows so well now I'm even going to wax it today.......Rich

 

[Coyote machine]

Wax? What's that?:confused3:

 

[JordanK]

(My first post)

I've finally found out that there is a grease fitting there but it is too late. I'm pretty sure One (or both) of the bearings are toast, meaning I may have to replace them. Every time I turn the PTO shaft it squeals at a certain spot and is really hard to turn. I was wondering if you (Kubota3710 ) or anybody else knew how to replace the bearings. All I ask are some tips on doing it, for instance, do both the needle bearing and the ball bearing come out with the shaft, or do I have to tap them out separately? If so... how?

Thank You to anyone who attempts to help me or let alone read this post.
Thanks,
Jordan