This document provides instructions for disassembling and assembling components of the circle drive system for a Caterpillar 140M 3 AWD motor grader. The disassembly process involves removing 16 bolts, nuts, and other hardware to separate the housing, cover, brackets, and shaft assembly. The assembly then describes installing various seals, bearings, and other parts in the reverse order and specifies tightening bolts to the correct torque specifications. Precise cleaning and protection of parts is emphasized to prevent contamination.