I took my new to me G1900S for the first cut and noticed the rear wheels wobble left and right. Not sure if this is common for all wheel steer units but seems sloppy? If you push on the back left or right fender you can move the tractor back and forth 1/2 to an inch easily. When I look at the inside of the rear wheels it just looks like the U-joints are allowing the play and it’s not coming from the wheel bearing
G1900S wobbly rear wheels
- Thread starter Blachermeier
- Start date
Have you checked the lug nuts?
The U joint has nothing to do with supporting the rear wheels only rotating them.
Dave
The U joint has nothing to do with supporting the rear wheels only rotating them.
Dave
Yeah log nuts are tight and I didn’t see a lot of play when looking at the axle shaft and bearings. It just seems like the shafts are sliding in and out with the U-Joints movement.. very odd but doesn’t feel normal
Here is a better video. It does seem loose at the bearing but also in the vertical knuckle. Any idea what needs to be repaired, replaced, or tightened? Confirmed again lug nuts are tight
https://youtu.be/04VvVpq0uA4
https://youtu.be/04VvVpq0uA4
BigG
Well-known member
Equipment
l2501, FEL, BB, Rotary cutter, rake,spreader, roller, etc. New Holland TL80 A
Jack it up and remove the tire. Then you will be able to see the movement and go from there. Take another video with the camera held still and some one else causing the movement
How many hours are on the tractor?
How many hours are on the tractor?
Just under 1,000 hours. I will remove the wheel and inspect next like you said. Didn’t know if these things were known for going through specific bearings or joints
look closely at the knuckle. There ain't no ball joints but there are kingpins that sometimes wear. Also look at the hub. It is splined to the axle. There is sometimes some play there too. The kingpins are usually softer than the knuckle so when they wear, you just replace the kingpins. Similarly the hubs are softer than the axles so when they wear, you replace the hubs only. They're held on by snap rings and that's why they tend to wear, there ain't nothing holding them tight. Also for that reason they usually slide right off.
I re-done mine a few years ago (1300 hours+) and had to replace the king pins and the hubs; solved 99% of it although not ALL of it (you won't get them perfect because of the design). While I had it apart I noticed some play in the steering gear. Pulled it apart and found that the shaft was loose inside the quadrant (again splined/loose fit). Thought well I'll just drill it and stick a set screw in it. NOPE...the gear/quadrant is harder than hammered hell and just laughed at every bit I had. Hmm...well, tack weld it. That worked (TIG, Hastelloy W filler before it went sky high in price), worked great for a year or two, loose again now and I ain't gonna completely tear the mower back apart just to fix that. Not now anyway. Grass needs to be cut about every 3 days right now.
I re-done mine a few years ago (1300 hours+) and had to replace the king pins and the hubs; solved 99% of it although not ALL of it (you won't get them perfect because of the design). While I had it apart I noticed some play in the steering gear. Pulled it apart and found that the shaft was loose inside the quadrant (again splined/loose fit). Thought well I'll just drill it and stick a set screw in it. NOPE...the gear/quadrant is harder than hammered hell and just laughed at every bit I had. Hmm...well, tack weld it. That worked (TIG, Hastelloy W filler before it went sky high in price), worked great for a year or two, loose again now and I ain't gonna completely tear the mower back apart just to fix that. Not now anyway. Grass needs to be cut about every 3 days right now.
Ok so I took the wheels off and it does look like the Hubs have excessive play. The local Kubota dealer wants $281.53 per side.. anyone have a part number or place online that’s more reasonable?
You can find the part numbers and illustrated drawings here.
https://apps.kubotausa.com/illustrated-parts/
You can then search online for pricing using the part numbers.
Good luck.
https://apps.kubotausa.com/illustrated-parts/
You can then search online for pricing using the part numbers.
Good luck.
Also I removed the c-clip on the outside of hub but it does not slide off. Is there an internal clip behind the hub that needs to be removed as well?
Did you look at the illustrated part diagram link posted earlier. It might help you understand the assembly.
Yeah I did. The pictures didn’t really help but I do see a clip behind the hub that appears to be stopping it. I’m going to try and remove that and see if it comes out tomorrow.
Those things are getting old. Wasn't much aftermarket support for them when they were new, even less now. Kubota is probably your only source for hubs. That's one of the reasons I sold mine. That and the guy made me an offer on it that I'd have been stupid to pass on.