EZ lube spindle and bearing repack question
My TT axles have the EZ lube spindles with the grease fitting on the end. It's time for me to repack the bearings. Is it safe to hand pump new grease through the fitting while slowly turning the whe...
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RinconVTR wrote:mike-s wrote:RinconVTR wrote:If you think that, you're out of the discussion for ignorance. If there's no pressure, by what supernatural magic do you think grease gets pushed through the bearings?
The EZlube system is NEVER under pressure at any point in time...ever. As in, never ever...ever. Did I mention never?
With the rubber cap off, the hub has a huge open void that does not allow any pressure to build. That simple.
Being completely seriousness, I think you need help.
Good drawing. The grease has RESISTANCE to flow because of it's viscosity so if the seal lip contact with the shaft is not good enough it will follow the path of least resistance like water and take the short path and flow past the poor seal. There is FORCE to move the grease to wherever it may flow but the area isn't under pressure. Pressure equals force x area. You cant put a pressure gauge anywhere in the cavity and build pressure. It will always move the grease. If the grease cant be moved with out it going past the seal then the seal isn't doing it's job.
The seal surface has to have the proper finish for the seal to break in. A new seal shouldn't be riding on an old "path". The seal cant be installed crooked in the bore.
It's not a flaw in the design just because ez lube proves that the sealing is poor. So should they have designed and installed ez lube on all these axles.....well maybe not. Could the sealing be pee poor from the day it's new? Well...it is an RV :)
