I would do all 3 spindles while your are in the process of repairing. They are easy to do. Here are the parts you will need.
Bearings are part# set 2 or LM11949/LM11910. You will need 6.
https://www.rockauto.com/en/parts/ti...l+bearing,1672
I have used these in the past without any problems.
https://www.ebay.com/itm/28146943651...Bk9SR8jVzaGBYg
Seals, you will need a total 6. I have used these also.
https://www.ebay.com/itm/28101070415...Bk9SR5KwkaGBYg
The idler pulley bearing can also be replaced. Here is one I did on a 3240.
Drill the spot weld/rivets out with a 1/4" drill bit and separate the pulley and bearing. Drive out the bearing spacer and insert into the new bearing. My bearing was a 6203 double sealed but yours may be different. I then reassembled with (6) 1/4-20 bolts.
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