This document provides instructions for disassembling and inspecting various engine components of a 303C CR Mini Hydraulic Excavator, including the timing gear, camshaft, oil pan, piston, connecting rod, crankshaft, and cylinder block. It outlines the disassembly sequence and order of removal for each part, and includes illustrations showing how to measure specifications like backlash, end play, and clearances. Technicians are directed to inspect parts for wear and damage during disassembly and replace worn components.