The document provides instructions for disassembling and assembling a piston pump. It includes 30 steps for assembly, beginning with cleaning parts and ending with filling the hydraulic system with oil. The 3 steps for disassembly are: 1) removing bolts and the head, 2) removing internal seals and plates, and 3) removing pistons, bearings and other internal components. Tools include retaining ring pliers, a dial indicator, and a bearing puller. Safety precautions are provided for spring loaded parts.