Classification of manual hydraulic pumps that generate hydraulic pressure through human operation. These pumps require no power source and offer excellent portability, making them ideal for maintenance work and emergency hydraulic supply. Available in lever-type, handle-type, and foot-operated configurations, they are suitable for driving hydraulic jacks, hydraulic presses, and hydraulic cylinders. Widely used in construction sites for heavy object movement, factory equipment assembly and disassembly operations, and mold changing work, they are clearly distinguished from electric pumps and engine pumps by their manual drive system. Featuring compact, lightweight design for easy transport, they are optimal for work in confined spaces.