Had you replaced bearing or bearings in that 1000hrs.IJ Seems that bearing or them bearings need to be replaced within that time to prevent crowling which will work outer race of bearing in housing. The first machines that had that design were the R40-50's. We had a couple '89 machines do just that and found out that bearing with orings on it was placed to inside which is wrong. There was not enough material to support bearing for long periods without working looser and looser in housing. Same affect of bearing starting out loose in housing from plant. We only had a couple machines with bearing in wrong so very little problem. We carried a new sheave on hand for 10 years before sending it back. Never had any problem with R62-72s until a '98 machine had one come loose and none since. I believe it was one of the first ones with the wave washer which was to help eliminate early noise from bearings. I think they must of had clearance to wide on first run and maybe some since. I was wondering what we could do to get bearings to last longer. I figured if the wave washer didn't work I would have housing milled to accept two inside bearings side by side. Just hasn't been enough of a problem to attemp that. On the early R50s we had used the same bearing in both locations and loctited them in with no adverce problem but didn't prove to be necessary for other machines were having no problem. Could be the better balanced ones will last longer. Wouldn't hurt to blow sheave clean when blowing radiator to help keep in balance. Good luck
