Scary wheel failure

[FlaDon]

165 ft-lbs actually. I think they upped the spec after SD's were out a couple years. And I think it is a ton of torque. My large 1/2" torque wrench (25-250 ft lbs) requires quite some pressure to click out on these. I don't weigh enough, so I need to leverage against the ground or truck to make that click sometimes. I love when I run across the occasional 200+ ft-lb crankshaft nut:confused2:

Wait till you get to head nuts that require 1600 ft/lbs and are 12' up in the air. With no place to anchor the torque multiplier.:confused2:
My small 1/2" torque wrench is a 25-250 digital. The large one is a 100 to 600lb/ft 3/4" drive to match the torque multiplier. Without it some tractor tires would never have come off.

 

[JoelD]

Wait till you get to head nuts that require 1600 ft/lbs and are 12' up in the air. With no place to anchor the torque multiplier.:confused2:
My small 1/2" torque wrench is a 25-250 digital. The large one is a 100 to 600lb/ft 3/4" drive to match the torque multiplier. Without it some tractor tires would never have come off.

That is crazy torque.

Joel

 

[Renze]

That is crazy torque.

Joel

At work, when the service department is doing brakes of the hubs of 18 ton wheel loaders, they once had to use the shop overhead crane with a 2 meter pipe on the torque wrench, with another loader pushing on the front end...

You really get blown away by the torque applied in that situation... luckily ZF has called for a modification, which will change one single nut to hold the brake and final drive package together, to a circle of several individual bolts on a securing cap...

 

[tcartwri]

We had a hub and wheel assembly shear off this summer on our 3 axle float. Very fortunate to have happen in the parking lot. If it had come off minutes earlier it certainly would have run into oncoming hwy traffic. There is no way this crack could have been found in an inspection, and we watch this stuff like a hawk. Very sobering.

 

[Renze]

Very fortunate to have happen in the parking lot.

Now you say so, i busted the hub of my bale trailer 2 weeks ago, after making a 20 mile round trip to pick up a load of haylage: When i turned into our driveway, one hub splattered apart, and i had to jack up the trailer and block up the bogie on one end with wood so i could make the final 50 meter to the unload area, on 3 wheels.
I didnt loose a wheel but i would have been sorry if it happened at 35km/h when turning onto the only bridge over the river in town, i would have had a problem... if the wheel had fallen off, the trailer would have went over onto who knows what...

 

[robs660]

To be clear
Do not use an impact wrench on your wheels. We are all beating around this point but no one has yet to say the words. Bad idea especially on cheeper aluminum trailer wheels.
Well worth 2 minutes of hand work