The wildcat and tiger cat say to do the same thing. I put zero fittings in and left them. I greased my front casters last week actually and I thought to myself that there seemed to be a lot of pressure in those casters. It was pretty hard to pump a few squirts of grease in there. I also looked at the grease cap and briefly wondered why no grease was coming out anywhere. It's almost like they're semi-sealed and the caps need to come off to allow fresh grease to go in and old grease to come out. I didn't give it enough thought to even mess with it. It was just a fleeting thought as I was greasing. Hope that all made sense cause my wife got me a 6 pack of good beer tonight
I'd be interested to know about this tho.