Buy aftermarket replacement idlers for the Kobelco SK30SR-3 and Kobelco SK35SR-3 mini excavators online at Pentom Supply and save on your maintenance budget.
Usually when your track starts sagging operators assume the track is stretched out. It is very likely that the sprocket and the idler wear is preventing the track from tensioning properly so it is possible that simply replacing the idler alone will give extended life to the track. Check your sprocket and rubber track and consider replacing all of the worn parts at the same time when possible.
Please double check your exact machine model before purchasing.