Otc otc4020 air/hydraulic pump new. The otc air/hydraulic pump are an ideal all-around power source that develops 10,000 psi at 100 psi air. Product features a two-stage release mechanism, internal relief valve as well as a 3/8 inch nptf oil port and 98 cubic inches of usable oil. Ideal all-around power source develops 10,000 psi at 100 psi air. 3/8 inch nptf oil port. 98 cubic inches of usable oil. Check out my other items. Be sure to add me to your favourites list. The item "Otc Otc4020 Air/Hydraulic Pump New" is in sale since Monday, November 21, 2016. This item is in the category "Business & Industrial\Hydraulics, Pneumatics & Pumps\Pumps & Pump Accessories\Hydraulic Pumps". The seller is "sarafankit2009" and is located in Olean, New York. This item can be shipped to United States.