LittleBill21
Veteran Member
it has been shown hundreds of times of bearing seals failing and coating the brake linings and everything else.How do you grease an axle wrong with a zirc fitting??
If you just do 6 pumps of grease, fresh grease will never reach the outer bearing. There's a minimum of a 1/4 tube of grease capacity inside the hub between the inner and outer bearing on a 3500lb axle.
Excess grease will ooze out the outer bearing into the cap. So there shouldn't be much of a chance to build up enough pressure inside to force the grease past the lip seal.
I could see a failure if whomever installed the lip seal put it in backwards or lost the spring out of it.
But if the lip seal is installed correctly, then you can pump grease till your hearts content and it won't push past that lip seal and effect your breaks.
your suppose to lift the wheel and spin it while using the zirc fittings, I see literally 0 people do that, and using battery powered and air pressure grease guns, if you give it enough, you can blow the seal.