How do you know when to lube your bearings on your trailer? My dealer has no clue. They said, "Bearing Buddies?" Anyone?

Pump grease into them until the blue plastic insert pushes out. Thats how it was on my 03.

My husband lubes our trailer Bearing Buddies when the outside seal is flush with the hub. He said to only put a little grease in it. Just enough to make the seal stick out a 1/4". If you put too much grease in it will blow the seal and get really messy.

where are the zerts at?

If you have bearing buddies they are right in the center of the hub sometimes they put a cap over it that you need to pry off

thanks Jay