RinconVTR wrote:
Likes to tow wrote:
If that cavity is totally full of grease, what happens when the brakes heat up the drum/hub and the grease expands. Where does the grease go?
EZ-lube "issues" are over-hyped and full of assumptions.
Unless the axle seal is bad, you will NOT blow the seal. It's impossible, it takes significant pressure to blow a good axle seal and the EZ-lube system does not build ANY pressure. Zero.
And if you pump the hub full of grease and do not remove any at all leaving no air space (like a bearing buddy, right???) where does the grease go when it warms up? Sounds like a smoking gun right? Wrong.
An overfilled hub will not blow the axle seal before air or grease escapes from the rubber grommet? That grommet is not even have as good a seal as the axle seal. It will bleed air and grease well before a good axle seal ever will.
And I mentioned bearing buddies, which retain ZERO air gap within the hub and hold the grease under slight spring pressure. Where are all the blown seals from temperature increase?
I was thinking the same thing. Which way would excess pressure release? Through the seal which is designed to SEAL? Or out to the outside which is designed to let grease out under the relatively light pressure of a hand pumped grease gun?
I think I will go with the more likely answer.