Have a mining customer that has a few crawler draglines. They are experiencing roller wear on #1 and #6 rollers (boogies for you Armour heads). I have 4 theories that could explain this. I'm wondering of I am missing anything?
1) Boom Moment - produces downforce and additional stress on roller bearings 1 and 6 depending on direction
2) Track Slack - during movement increases stress on roller bearinsg 1 and 6 depending on direction
3) Contamination - during movement, dirt and dust presents to 1 and 6
4) Idle Arms - if not balenced, additional stress on 1 & 6
