This document provides instructions for disassembling and assembling the piston pump of a 160M 3 AWD motor grader. It outlines 21 steps for disassembling the pump, removing components like bolts, seals, gears, shafts, bearings, pistons, springs, and plugs. It also references tools needed like retaining ring pliers. Reassembly follows the reverse of disassembly procedures.