I have had pretty good luck with this style roller so far . After checking the newer 4300 grounds master I noticed one of the upgrade bearings was broken . I'm starting to think that the ball bearing failures on the fairway unit Reel mower are breaking do to impact of underlying bedrock on the course .
Only have a stick welder and made my first attempt using a washer . Started to move but broke the welds .
Next up was a 1/2 " nut I used the bolt to hang on to weld . No problem to beat the remaining piece of the race out .
Pressed in one new bearing and pumped grease in a good 30 times before installing spacer and then pressing in the other bearing .
Use red loc-tight . About the only thing that will keep the bolt in place .
Torqued it in place . The metal roller will wear out if you have a lot of cart paths . Some of the guys are going with Nylon aftermarket ones with good success.