Help with zirk fittings
Question: (I hope this makes sense....here goes) When pumping grease through the wheel zirk fittings, is it fair to say that as long as grease is flowing back out through the front seals that you hav...
Forum Discussion
Lynnmor wrote:Huntindog wrote:
Avoid the headaches. Just do not use the zerk fittings. A manual inspection is required anyway. So you may as well repack the bearings by hand then,
Anything else is just a guess.
True on the guess. Plus, as the bearings warm, if the chamber between the bearings is MT, there is less pressure on the seal, less chance of leak.
I have heard it said "As the bearing gets hot that grease can flow in" But if you look at how hot grease must be to flow, and understand the source of the heat is the bearing, long before the grease in center starts to flow, the grease in the bearing has burnt off, and bearing is burnt to the point axle and hub are scrap.
And look at the design. You pump grease in the inner bearing. That dirty grease is pumped out into the chamber between. Grease is pumped out of that chamber into outer bearing. Say the gods are all smiling on you, and you replace all that dirty grease out of that inner bearing, where does it go? Sooner or later that dirty grease must go thru the outer bearing.
