Whoa, the Tree J325 is a grease pack spindle. YOU DO NOT LUBE IT. The air oiler in the back is only for the pneumatic unclamp for the draw bar. It will only oil when you eject a tool. The Bijur pump supplies the ways and ballscrews only, if there is a puddle under it, either the plunger is leaking, a line is leaking, or someone spilled. The ballscrew support bearings have Zerk fittings, and all you need is an EP2 grease, like shell retinax. Those really don't need to be greased very often, the trees don't move that fast.