Manual hand pumps are designed to create flow of hydraulic oil, usually for activation of a hydraulic cylinder. They can be used in double acting applications.
Hydraulic Pumps - Hand Pumps - Two-stage Pumps - Bailey Hydraulics
Chief Double-Acting Hand Operated Hydraulic Pump 1.8 Gal. 3/8 NPT 45 CM3 Flow
Tools & Equipment - Hydraulic Cylinders & Pumps - Page 1
Tactical Manual for AV-8B Aircraft Operations - Volume II: Weapon Descriptions and Delivery Data, PDF, Military Technology
Hydraulic Power Units for Sale
Hydraulic piston hand pump with changeover valve for double acting cylinder 1.5 CID with 3-quart steel tank
2.5 bore x 14 stroke clevis hydraulic cylinder, Clevis End Hydraulic Cylinders, Hydraulic Cylinders: Farm and Ranch Depot
Hydraulic Pump, Triple Action w/Remote & 6qt Tank – PJ Trailers Canada, Inc.
Hydraulic Pump, Triple Action w/Remote & 6qt Tank – PJ Trailers Canada, Inc.
Maxim Power Unit 6 Qt Steel Tank 12 VDC, 3000 PSI, 3/8 NPT, 1.3GPM
Double-Acting Hand Operated Hydraulic Pump with Handle 1.3 Gallon
Hydraulic piston hand pump double-acting function with double-acting changeover valve for double-acting cylinder. 1.5 CID working volume with 5-quart
Magister Double Acting Hydraulic Pump, Hand Operated Hydraulic Pump with 1.5 CID with Changeover Valve for Double Acting Cylinder, 5 Qrt Tank Hand
Tools & Equipment - Hydraulic Cylinders & Pumps - Page 1
Hydraulic piston hand pump double-acting function with double-acting changeover valve for double-acting cylinder. 1.5 CID working volume with 5-quart
Magister Double Acting Hydraulic Pump, Hand Operated Hydraulic Pump with 1.5 CID with Changeover Valve for Double Acting Cylinder, 5 Qrt Tank Hand