1955-1980 Mercedes Benz Unimog Type 404 Service and Repair Manual OEM

• Details the 1955–1980 Mercedes-Benz Unimog 404.0 and 404.1 off-road vehicle variants, covering the U60, U80, U82, and U110 trim levels in both open and closed cab configurations.
• Spans 900 pages of factory-derived archives, providing the specific calibration and fluid data required for long-term vehicle service and restoration.
• Compiled by Ars Technica Electrographics, sourcing data directly from original manufacturer specifications.
• Features over 100 technical illustrations, detailed wiring diagrams for both 404.0 and 404.1 electrical systems, and precise tightening torque tables.

Operational and Maintenance Documentation

What exactly is inside this reference set? It provides an exhaustive look at the core systems of the Unimog 404. The manual breaks down critical shop tasks, focusing on complex areas like instrument cluster operation, transmission shifting patterns, and steering system maintenance. You will find extensive documentation detailing the exact setup and layout of the compressed-air brake system. When servicing these heavy-duty pneumatic and chassis systems, always ensure the vehicle is properly supported and system pressure is safely relieved before beginning work.

Expect thorough run-downs on cold-weather operations, including the preheating systems for batteries and coolant. It also covers the exact synchronization procedures required for the engine's dual-carburetor setups. Maintenance schedules are strictly mapped out. The documentation lists interval-based tasks covering everything from basic oil changes to valve clearance adjustments and steering linkage lubrication.

Specification and Reference Data

Hard numbers matter when you are in the shop. This publication delivers comprehensive charts for fluid capacities, exact torque values, and electrical fuse coding. For example, the coolant system capacity for the 404.0 is documented at precisely 16.5 liters. Need to set the valves? The cylinder head specification tables list intake valve clearances at 0.11–0.20 mm.

Furthermore, cylinder head bolt torque values follow a strict multi-stage sequence. The M 180 engines require 90 Nm, while the M 130 demands 110 Nm. Navigating the provided wiring diagrams and component identification keys is straightforward, making this manual an invaluable resource for accurately diagnosing electrical faults and hydraulic pressure issues.