Weekend Freedom Machines banner

1 - 13 of 13 Posts

·
Registered
Joined
·
1,017 Posts
Discussion Starter #1
I have encountered a number of customers that are unaware that JD changed their garden tractors from 1" front axle spindles to 25mm front axle spindles mid year 1986. This change effects the late 316, 318, 330, 420 and 430 garden tractors. I put together a list of models and SN breaks as follows.

316 (late version, w/Onan engine)
Up to SN 372595 used 1" spindles.
SN 372596 and up used 25mm spindles.
SN 010001-120000 used 25mm spindles.

318
Up to SN 372595 used 1" spindles.
SN 372596 and up used 25mm spindles.
SN 010001-120000 used 25mm spindles.

330
Up to SN 366886 used 1" spindles.
SN 366887 and up used 25mm spindles.

Note: All 322 and 332 models used 25mm spindles.

420
Up to 362061 used 1" spindles.
SN 362062 and up used 25mm spindles.

430
Up to 362714 used 1" spindles.
SN 362715 and up used 25mm spindles.

Note: All 425, 445 and 455 use 25mm spindles.

1" is roughly .015 larger than 25mm. That means you can put a 1" wheel on a 25mm spindle but it will be a sloppy fit. A 25mm wheel will not fit on 1" spindle.
 

·
Registered
Joined
·
1,017 Posts
Discussion Starter #3
The 200 series used 1" spindles to the end of production. The parts catalog does not list a 25mm bearing for the 200 series.
 

·
Banned
Joined
·
1 Posts
Steve,
Do you know if the bearing OD's are the same on the 1" and 25mm bearings? If they are, this would allow you to switch bearings and still use the same wheels.
Thanks, Ken
 

·
Registered
Joined
·
1,017 Posts
Discussion Starter #5
The 1" ID bearing pn AM102605 has an OD of 2".

The 25mm ID bearing pn AM102888 has an OD of 52mm or 2.047".

So you cannot use the standard wheels with a metric bearing or vice versa.

Also I forgot to add, the 420 and 430 SN started over in 1990 with SN 010001 and use the 25mm spindles.

(Message edited by steveh on July 27, 2006)
 

·
Registered
Joined
·
214 Posts
Steve,
Do you know of any one using 1" wheels on the metric spindles? Would you thing it would be recomended?
Don C.
 

·
Registered
Joined
·
1,017 Posts
Discussion Starter #7
I have seen some folks try. It is a sloppy fit and it will create accelerated wear on the spindle over time. That combination is just not a good idea and I would not do it on any of my tractors. So "NO" I would not recommend that combination.

The next question someone is going to ask is if they can shim the bearings to the spindle. I am sure someone will do that. But again, I would not do that to any of my tractors.

The only right way is to get the correct parts for your tractor SN. If anyone needs wheels/bearings let me know and I can get you correct parts or at least the PN.
 

·
Registered
Joined
·
15 Posts
Dang!

I just bought a nice set of newer front rims for my 318 s/n 222135 if memory serves. My spindles are 1". My purchased rims came off of a '90s era machine. I haven't swapped them out yet (thank goodness).

47/1000ths is a lot of slop. I guess that was a bad purchase. I don't suppose a bearing is available with a 1" ID and a 52 mm OD? No, I thought not.

Thanks for the info Steve!

Dave Zeigler
 

·
Registered
Joined
·
1,017 Posts
Discussion Starter #9
When I get some slack time at the parts counter I will look for a "Conversion bearing" for lack of a better description. If I can locate such a bearing I will post the info here.
 

·
Registered
Joined
·
1,017 Posts
Discussion Starter #11
David,
On that table of bearings it looks like the 6205-2RK-1" L/T bearing is the correct ID, OD and Width. However, it does not indicate if that bearing has the flange or clip on the OD. I think a phone call would be in order before buying anything. I spent some time looking around the Timken web site today but I have not yet found a Convesion bearing.
 

·
Registered
Joined
·
15 Posts
No worries. I haven't had my wheels off to see what is necessary. I figured there would be a flange on the bearing. I won't be buying anything unless you give it the seal of approval - or I figure out what I'm doing.


I suppose a wide enough bearing could have a slot cut on a lathe and a OD spring clip installed - more scrounging for parts and finding a machinist at work willing to do a "government job".

At this point I am happy that such a "Conversion Bearing" is possible.

Dave
 

·
Registered
Joined
·
1,017 Posts
Discussion Starter #13
I have some updated info to add to this post. I have not found a conversion wheel bearing. BUT, I did find out that the front axle casting is the same between the standard and metric spindle models. This means you can switch between 1" and 25mm spindles simply by changing the spindle bushings in the front axle casting.

M83541 axle bushing accepts standard 1" spindles.

M70808 axle bushing accepts 25mm spindles.

This applies to the late model 316, 318, 330, 420 and 430 tractors. And you have to have the appropriate spindles as well.
 
1 - 13 of 13 Posts
Top