I installed a new Currie steering a while ago and got some grease to go in a couple zerk fittings but now I tried to add more grease to finish them. The grease gun gets a couple pumps out and then starts to back up and I can't pump it anymore. So I take the grease gun off and the grease starts to ooze out of the zerk fittings. Are the zerk fittings bad and just need to be replaced or is some voodoo magic I need to know about Currie stuff? I have the right adapter for my gun to zerk fitting also.