G642 gradall with little over 5k hrs has started blowing 15 Amp fuse to ign.switch runs fine otherwise .has 4 cylinder jd motor .replace fuse it will run fine for an hour or so first thought fuel sol.was over heating does not seem to be that
At first I thought I could help but our 534D6 is pre JLG and has the 4BT Cummins.