I currently have oil bath hubs on my trailer. I am looking to swap over to grease (zerk style)hubs. The reason i am looking to switch is , i can not get these hubs to stop leaking. I have tried all types of sealants, gasket material and they still leak and or push half way out on longer trips, to the point where i carry a rubber mallet and a 2x4. If someone has some tricks of the trade or ideas i am open for anything.