This document provides instructions for disassembling and assembling the final drive of a 319D excavator. It describes in detail how to remove over 30 individual components of the final drive including the cover, carrier assembly, ring gears, and housing. Cleanliness is emphasized throughout. The assembly section explains how to install new seals and bearings, set bearing preload using shims, and reassemble all components in reverse order. Proper tooling and application of sealants are specified.