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Re: Mower deck modification

Posted: Fri Sep 03, 2021 10:23 am
by Eugen
myerslawnandgarden wrote: Fri Sep 03, 2021 12:51 am Wouldn't you prefer the steel shielded bearings since that's what J I Case used when built? Just curious.....

Bob
It's a good point Bob, but if I wanted to stay with the original type I would get the original bearings. I'm actually thinking that the RS seal is better in this application, with all due respect to the J I Case engineers. The steel shield is meant to protect against larger particles, and always has an opening between the inner race and the shield. That offers no protection against dust and water. However, the way the spindle and housing is built on the mower deck should allow no large particles. If anything makes it into the housing, it'll be dust and water. The RS seal has more friction than the steel shield because it touches the inner race, but that should not matter here. As I said, other newer design decks use the 6204-2RS bearing, so that's a confirmation too.

Another advantage of the 2RS seal is that one can remove it carefully and pack the bearings with good quality grease. This is not possible with the steel shielded bearings, because the shield is stamped permanently to the outer race.

As I said before, I have one deck with original and new bearings, so what I'm doing here is a bit of exploration which might help others, since the modification is really easy. I won't, but perhaps someone else can offer this modification service to the community, if it turns out to give more life to the deck on the same set of bearings than with the original ones. :creeper: :cheers:

Re: Mower deck modification

Posted: Fri Sep 03, 2021 8:57 pm
by myerslawnandgarden
Just as a point of interest, the factory bearings that you mention are now the 2RS style bearings. The part number did not change, still C28971.

Bob

Re: Mower deck modification

Posted: Fri Sep 03, 2021 10:46 pm
by Eugen
myerslawnandgarden wrote: Fri Sep 03, 2021 8:57 pm Just as a point of interest, the factory bearings that you mention are now the 2RS style bearings. The part number did not change, still C28971.

Bob
Then I'm not really chasing wild geese here. Not entirely at least.

Re: Mower deck modification

Posted: Sun Sep 05, 2021 1:56 pm
by Eugen
For an extra $10 I these which I like better.


D992111C-F84B-4AFD-ABB1-26AC6C717472.jpeg

FDD3CF47-EBCC-4012-B16A-C9A5D232907F.jpeg

Re: Mower deck modification

Posted: Mon Sep 06, 2021 6:52 am
by DavidBarkey
Eugen wrote: Sun Sep 05, 2021 1:56 pm For an extra $10 I these which I like better.



D992111C-F84B-4AFD-ABB1-26AC6C717472.jpeg



FDD3CF47-EBCC-4012-B16A-C9A5D232907F.jpeg
I keep those exact bearing in stock . Buy them 10-20 at a time as they fit many late model deck spindles .
Dave

Re: Mower deck modification

Posted: Mon Sep 06, 2021 10:37 am
by Eugen
@DavidBarkey do you ever open them up and pack them with better grease? I know some people say these bearings have neither enough nor good grease.

Re: Mower deck modification

Posted: Mon Sep 06, 2021 11:23 am
by DavidBarkey
Eugen wrote: Mon Sep 06, 2021 10:37 am @DavidBarkey do you ever open them up and pack them with better grease? I know some people say these bearings have neither enough nor good grease.
Allllllllllways , You have to be very careful to not damage the seal . My experience has been that ether low quality grease or insufficient grease in them. Have had great luck with even the cheapest bearings doing this .
Dave