Could it be some oil that's separated from the soap in the grease?
You could split the difference between gear oil and grease with "groil" if you aren't sure which one it takes. Something like Trition ELL (or whatever local brand you can get). We use it in front bearing at work instead of 90wt. We buy it in 120lb drums and use a regular air grease gun to dispense it, so it would fill through a normal zerk just fine.
What model box is it?
Tuesday, August 28, 2018 12:21 PM by