Dealer told me not to use the ez-lube because you can blow the axle seal if too much is put in it, which will put grease everywhere, including your brake pads. Now this was from the dealer who stays open by servicing RVs, so take it with a grain of salt. On the other hand, I was told this when I brought the trailer back right after purchase for blown axles seals and my brakes were covered in grease. I don't know if it was coinicdence or the dealer pushed grease through the ez lubes prior to delivery. Fortunately it was warrantied.