A FREIND HAS A 1863 CUB HE HAS BEEN HAVING PROBLEMS WHERE THE REAR BOLTS TO THE FRAME VIA THE AXLE HOUSING BOLTS THEY KEEP WORKING LOOSE,AND NOW ONE HAS SNAPPED OFF.WE HAVE ALSO HAD TO REPLACE BOTH FRONT MOUNTING BRACKETS FROM BREAKING WHERE THEY BOLT TO THE FRAME.HAS ANYONE ELSE HAD THESE PROBLEMS,WHAT CAN WE DO TO SOLVE THEM BECAUSE HE REALLY LIKES THE TRACTOR.