I had a replacement axle put on my older Ranger trailer last year, it has a dust cap with a rubber plug under which is a zerk fitting to grease the hubs . I noticed some brownish looking stuff around the rubber plug so pulled it off and the dust cap was full of water.I clean it out best I could and pumped new grease in that seem to push the rest of the old grease and water out. Can this type set-up be replaced with a bearing buddy instead of the dust cap with rubber plug or not ? And would I have to remove the zerk fitting to do this ??? Nothing is leaking out of the rear seal IMG_4758.JPG