Correct on the oil passage. If the suction and discharge lines are not orientated properly you will get mucho oil passage.
Any York install does require a coalescing filter ahead of the tank. No matter what, Yorks will send oil out the discharge line. They send more at higher rpms (above 1500 rpm range). The coalescing filter coalescs the small particles into larger ones so they drop out the air stream. You can then run a return line from the filter to the pump or put a holding tank and drain it every so often.
You can tell the series of York by looking at the end of the shaft. This requires the user to remove the clutch.
www.onboardair.com has info that can be d/l'ed on clutch removal and inspection of the shaft.
I have (2) 10 cfm Yorks sitting in my garage with one waiting to go in my 350. I'm trying to find myself a driver side battery tray from a '99 SD so I can put my tymar in and make room for the York. I already have my bracket made and a pulley will be finished shortly. For the pulley, I am mounting a single v-groove pulley to a serp. pulley for the PS pump. I'll then run the York off of the PS pump with the single v-groove belt.
Oasis pumps are nice, but they use a starter motor (sa Daryl has mentioned in the past) and they draw some SERIOUS amps from the batteries. Thus a serious chargeing system is needed. Lots of people want a electric motor as they don't have to run the motor like a York needs. Anytime they do some serious inflating or running of air tools, they will still have to run the truck to charge the batteries. Yorks are still in the lead with their large cfm ratings.
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