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Old 07-21-2014, 10:50 PM
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Default 3000 series axle leak

I spoke too soon on none of my tractors leaking at the rear axle. I finished putting the new head on the 3165, took it for a spin and it runs great. Parked it in the garage and found a small amount of oil on the floor this morning. It's nothing major, I just don't like stuff that leaks oil. Here you can see how the oil worked past the first seal and leaked out the axle cover. The tubes are dry on the the 3k tractors, all oil is kept in the differential.
DSCN1262.jpg

After work today I started pulling it apart. I looked in the manual and they show it on a work bench, I'm not gonna pull the whole thing off the tractor, that doesn't sound like fun.
You have to pull the fender pan, tank and rear frame plate, no big deal. I took compressed air and the shop vac and tried my best to get all the dirt and grime off the tractor because I want to reuse the oil..I'm cheap and it only has about 5 hours on it.
DSCN1271.jpg

Next thing is to remove the axle nuts. I don't have a socket big enough but I will next time.
DSCN1278.jpg

Then break out the pullers and pull the hub off. I put the lug nuts back on the studs and pulled on the black spacer plate. They are on there tight but mine both came off fine.
DSCN1276.jpg

Here is what the splined axle looks like that goes into the hub.
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File Type: jpg DSCN1277.jpg (22.1 KB, 280 views)
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Old 07-21-2014, 11:07 PM
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Here is what the inside of the differential looks like in a tractor without the locking differential. Looks pretty clean too.
DSCN1279.jpg

I took the U bolts off that hold the rear to the frame, 2 of the 4 bolts on the front support and loosened the other 2 on the front support. I then put a strap across the top to support some of the weight and it gave me enough clearence to remove the axle cover plate.
DSCN1283.jpg

Here is side that the seal failed on. I'm not sure if water got in it and caused it to fail but the other side that is not leaking is clean.
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File Type: jpg DSCN1285.jpg (26.1 KB, 275 views)
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Old 07-21-2014, 11:36 PM
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I pulled the complete axle out and need to clean the rust off of the axle so I can remove the bearings.
DSCN1288.jpg

I used a 3M Scotch Pad on it and cleaned it up and the bearings slide off. It looks like the seal came loose in the bearing block. I need to see if I can find new seals and reuse the bearings. Cub wants around $50 for each one and there are 4 total. The arrows point toward the differential. The left bearing is what I call a babbitt bearing and the right one is a roller bearing....that is not in any oil and doesn't have a grease fitting. What were they thinking!

DSCN1291.jpg

Here is the "babbitt bearing", it is the one near the differential. It has a seal around the axle on the outer side and a seal around the block on the side towards the differential(side shown). The two make a complete seal to the axle tube.
DSCN1293.jpg

And here is the roller bearing, it is near the hub and has seals on both sides.
DSCN1294.jpg

Okay guys. I need to find seals for this thing. Can anybody tell me what seal this is? It looks like it was made by KTP and the number is 4885.
DSCN1297.jpg

Thats all for tonight. Stay tuned for tomorrow knights episode.
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Old 07-22-2014, 07:43 AM
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Todd

Thank you so much for doing this killer write up on how to repair one of these. This one may end up being a sticky.
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Old 07-22-2014, 08:31 AM
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Thanks Sam. I think I found the seals needed. They are 30mm x 40mm x 4mm. There is a toatal of 6 used. I found a few places that have them. Here is the ones I found at Motion Industries.

http://www.motionindustries.com/moti...es%3EOil+Seals
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Old 07-22-2014, 08:36 AM
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This explains why the seals don't show in the parts list's. Nice that MTD wants you to buy a complete bearing block. Designed by the bean counters for sure. If I had one I'd be redesigning it for sure.
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2264 with 54 GT deck
1641 AKA Black Jack with a 402-E Haban Sickle bar mower
1641 AKA Black Jack #2 with 46" deck
149 with a 1A Tiller
JD330 with 50" deck and 3 point hitch.
JD317 dump truck
BX2660 with FEL & Grassanator
  #7  
Old 07-22-2014, 07:37 PM
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Killer write up Todd!

Never been into the rear on a 3K. TBH, not impressed. I do, however like the gear reduction at the rear as opposed to before the pinion. Keeping pinion speed high increases torque. Still think I'll keep my "older" machines.

Good job finding the seals.

I too say, make this a "sticky".
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Runners: 1050, 1811, 185LB
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Old 07-23-2014, 10:41 AM
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This is fantastic! Great timing, Oak. This is just the info I needed. I wondered if those axel tubes were meant to be dry. Did you need/get new gaskets for the diff. housing? Great job, Thank You! Ken B
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Old 07-28-2014, 04:00 PM
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Todd, did you get this wrapped up?
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"They say money doesn't buy happiness....... but it does buy Cub Cadets, and Cub Cadets make me VERY happy!"

Runners: 1050, 1811, 185LB
On the "back burner": 2-71's, 1250DS, 1000, 582, 682
Deere: 317 with tiller, 318.
Several parts machines, and stacks of motors!
Implements/attachments: (2)Agri-Fab, (3)Brinly, (13)IH/Cub Cadet, (2)Cozy Cabs, (13)homemade/other
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Old 07-28-2014, 04:05 PM
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Yes I did but I've been too busy to finish the post. So far it works great and was pretty easy to do. I will complete the post tonight.
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