Uneven wear on drives brakes

If you do not know what you are doing don't. That is why there are auto slacks. If they are working properly you do not need to. We check travel everytime we service a truck and maybe snug them up a bit. If they are out of adjustment repaired is required. That is the shops job.

 

Probably best to stay off limbs and back up off of them when you can.
Looks like you have double chambers on both axles so that is out.
Shoes like good. Unequal shoe wear has never been an uncommon thing on tandems.
Hat off for checking your equipment. I see some guys just do the smoke and roll test. It blows smoke and the wheels roll. Good to go.

 

They and everything else is grease starved (lube) IMO. Automatic slack adj do work. But s-cams need a shot of grease also, way more than once in 106k. Saying nothing of king pins, steering linkage etc. When seller advertises" fleet maintained. .i say run.

 

I don't know if its just the lighting or the angles but that cam tube doesn't look like its parallel to the axle. That'd cause some odd wear.

Also, do those cam tubes not have support brackets to the axle housing? I couldn't see any in the pics. That 3030 can and slack is a lot of weight hanging off the side of the brake spider.

 

At least once a month if the truck sees lots of rain and water. The heat in southern states thins out the grease quickly too. Should squirt some grease at least once a month minimum if not every 3000 miles.

 

The no support is normal on a lot of equipment and they do fine.
Have any of you seen the s cam housings and slacks with allen plugs in the hole for the grease fittings?
U joints and slip yokes without fittings?
Special lube I am sure as it lasts a lifetime. When one of those driveshafts blew out its life was over. Along with a couple of chambers, valves, hoses, ABS stuff plus tow bill and handing off load.
One company had units with 10- 12,000 hours on them. They had been on a 250 hr interval but the manufacturer approved 500 hr engine oil services when their oil was used.
Nothing else was done in between. When U joints and such start exploding who did they point a finger at? The operator!
Also had service calls because the s cams would not turn in the housing.
Most of you know many fleets are doing the minimum to maintain warranty and replacing them at the end of their warranty.