Floating 440
Member
I know this thread is ancient, but it's what came up when I googled "oil priming 440" so I'll add my experience. Was spinning the oil pump ccw with my Makita cordless for several minutes getting nowhere. Seemed to be spinning plenty fast enough, but I happened to notice my drill was in low gear. Switched it to high and had 60 psi in literally about 3 seconds.