Again, Thanks for the advice from ZANE, Ultradog, Dean and Ramon. When I rebuilt the piston pump several months ago, I put new lock washers on the pump/manifold bolts (this is where the oil leak is). Yesterday I removed the new lock washers and reinstalled the bolts without washers. Ran pump and lift. 12 hours later and no leak?? I really don't understand this but will watch this for the next few days. Zane , thanks for the offer, if it starts to leak again I'll e-mail you. Again, thanks, John
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