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Discussion Starter · #1 ·
I'm in the process of getting my L130 JD ready for spring and summer work so my grandson can help me with yard work. I want to replace the bad bearings in the mower deck spindles, but have run into a question. The JD parts catalog shows two different part numbers for the bearings. Upper bearing number is GX 20818 and the lower is GX 21510. I can read the upper bearing number on the old bearing as GX20818, but the lower bearing is so rusted that it can't be read. I had heard that both bearings were suppose to be the same . I measured the OD on both bearings along with one other bearing from another spindle, and all read the same at 1.572". I also measured the bearing area of the spindle housing and both upper and lower bearing housings read the same at 1.571" with a .001 interference fit. All ID measurements on all bearings were .666" on all inner bearing races. Has anyone replace these bearings before and what was your experience. This is a L130 with a 48" deck. Two spindles were replaced before and the bearings that I removed from them are made in China and I haven't tried to cross reference the numbers yet, although what ever number is on there , doesn't look like a bearing number. My main tractor is a 1025R.
 

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Looking at the parts description:

Top bearing - GX20818 Steel Shield
Inside Dimension0.669 IN
Outside Dimension1.575 IN
Width Outer Race0.472 IN
Width Inner Race0.472 IN
Dynamic Rating2,148.049 LBF
Static Rating1,068.966 LBF
Outer Corner Radius0.024 IN
Inner Corner Radius0.024 IN

Bottom bearing - GX21510 Steel Shield (1- Side)
Inside Dimension0.669 IN
Outside Dimension1.575 IN
Width Outer Race0.472 IN
Width Inner Race0.472 IN
Dynamic Rating2,148.049 LBF
Static Rating1,068.966 LBF
Outer Corner Radius0.024 IN
Inner Corner Radius0.024 IN
 
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Discussion Starter · #3 ·
I see the only difference is the lower bearing is only sealed on one side. The newer spindle housings do have a grease fitting on them so that would explain the reason. Thanks for the help.👍👍👍
 
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