TGB Blade 250 ATV Quad Service Repair Manual, Page 182Get this manual
16REAR BRAKEREAR WHEELREAR CUSHION Remove rear wheel axle and driven sprocket holder
n sprocket holder
Inspection
Check bearings on rear wheel axle bearing seatRotate each bearing's inner ring with fingersCheck if bearings can be turned in smooth and silent, and also check if bearing outer ring is mounted on bearing seatIf bearing rotation is uneven, noising, or loose bearing mounted, then replace itCheck oil seal for wear or damage, and replace it if necessary