diazr2 wrote:
coolbreeze01 wrote:
My E-Z Lubes have done the job on several trailers for 30 years or so.
E-Z lube is different than Bearing Buddies I believe E-Z lube has a hole that circumvents the seals. Bearing buddies do not. You push on an E-Z lube to hard and the grease falls harmlessly to the ground. You push on a bearing buddie too hard and you can blow out a seal. Just my experience at least.
Sorry but this not correct. I have seen EZ lubes leak and they have no special design by which to keep it off the brake pads - and that is exactly where it goes when it blows past the seals.
When you force grease in through the zerk, it flows through a hole in the middle of the axle and then back against the seal which redirects it forward and into the void of the hub. After it fills the hub the grease then moves forward and through the outer bearing.
This is why the seal fails. It must withstand a lot of continuous pressure as the grease moves through all this.
If a person just gives it a couple of squeezes and leaves it at that, you may not have done much. To get grease to the outside bearing you have to keep pumping until you see grease move around said outside bearing. Otherwise all your doing is getting a little grease on the inner bearing - at best. Or you may be just filing the hole in the axle.