Quad axle dump truck. Allison with 4.10 rears. Driver didn’t even know, just said tire was flat. What causes this?
There are two types light & heavy duty aluminum wheels. The area of web at cooling holes is allot thinner of large diameter holes on wheels starting 2007. Not uncommon to find cracks from hole to hole to stud bore to center. And that broke right through the cooling holes, it started at one worked it's way around. We had countless wheels warrantied, Alcoa sent us two pallets of new wheels, DOT nation wide knows there is a issue. Below is a wheel that is a light weight, arrow points to thin area to tell the difference. I've caught probably 14 on factory mounted steer's that cracked in under 100,000 miles. Those will also crack in the drop center area too, leading to the mysterious constant low tire issue. *
A thread I posted about it aways back. * HeavyEquipmentForums
May have to go back to daytons at that rate!!!
Nah---don't need no Michigan Mag wheels. * What doesn't help is overloading & zero turns. But if ATA can convince the feds and states about raising GVW's--A five axle will be 88K, a six axle will be 92, and so on. With the thought it will be good for industry and take trucks off the road making for safer highways--directly the opposite.
6 axles have been 94k here in ND for forever, we have 12 trucks that run 102k all winter long on 6 axles with the 10% and have never had any rim issues. Triple axle hoppers run 52.5k on 10' spread, lots of crappy tight corners.
Yes--some states vary on weights. But nationally 80k is limit. Depends on wheels you have, but with that said not all light weight castings break too. And states like Colorado we can only run on certain roads with 98,000. Ore--a A train can only be 40 and 20 can not go over 68' front to back, 42' leads can be used on a A train in Washington, all has to do with state bridge laws, and every other state is different. And just for the fact you haven't had any wheel issues doesn't mean there isn't a issue.
Hum--no reply, normal.
What is left to say? I'm not going to sit and argue with you. You say there's problems with wheels. I say we've not had problems, using them in pretty extreme applications weight-wise. I didn't figure there was anything more left to say. My bad I guess.