This service manual provides detailed instructions for the maintenance, repair, and troubleshooting of the Manitou MT 6642, MT 8044, MT 10044, MT 10055, and MT 12042 telehandlers. It includes comprehensive procedures for diagnosing, disassembling, inspecting, and reassembling key components such as the engine, transmission, hydraulic system, electrical system, and chassis. The manual offers step-by-step guidance with detailed diagrams, technical specifications, and torque settings. Maintenance schedules, safety protocols, and troubleshooting tips are also included. This document is essential for technicians and mechanics to ensure proper maintenance, efficient repairs, and optimal performance of these Manitou telehandlers.