This comprehensive service manual provides detailed maintenance and repair procedures for Liebherr diesel engines D 9406/9408 and D 9306/9308. Designed for both DIY enthusiasts and experienced mechanics, this manual offers step-by-step instructions based on complete machine disassembly, ensuring thorough understanding of every service and repair procedure.

The manual features numerous illustrations and photographs to guide you through each task. It covers various aspects of the engine, including technical descriptions, engine data and identification, adjustment values, operating pressures and temperatures, fluid quantities, torque specifications, valve adjustment, cylinder head gaskets, cylinder head, cylinder liner, piston and connecting rod, crankshaft and bearing, camshaft and valve drive, lubrication oil circuit, oil pan, lubrication oil pump, lubrication oil filter and cooler, coolant circuit, water filter, coolant pump, fan drive, fuel system, fuel pump, fuel filter, injection pump, fuel injector, engine exhaust, fan and flywheel side crankshaft seal, hydraulic pump auxiliary drive, air compressor, starter, air conditioner compressor and alternator, starting aid, turbocharger, gear drive (flywheel and fan sides), maintenance and inspections, service fluids, troubleshooting, and special tools required for specific procedures.

The LIEBHERR Diesel Engine D 9406, D 9408, D 9306, and D 9308 are powerful and robust engines designed for heavy-duty applications, particularly in excavators. These engines belong to the Liebherr D 9000 series, known for their reliability, durability, and fuel efficiency. They are renowned for their high torque output and impressive power-to-weight ratio, making them ideal for demanding tasks in construction, mining, and other industrial applications. The engines feature advanced technologies like common rail injection systems for optimized fuel efficiency and reduced emissions, along with robust construction and durable components for long service life.

The D 9406 and D 9408 engines are known for their high power output, ranging from 130 kW to 157 kW, making them suitable for larger excavators with substantial digging and lifting capabilities. The D 9306 and D 9308 models, on the other hand, provide slightly lower power outputs, ranging from 103 kW to 125 kW, making them suitable for smaller excavators and other applications requiring less power. These engines are known for their low operating costs, due to their fuel efficiency and long maintenance intervals. The combination of power, durability, and fuel efficiency makes the LIEBHERR D 9000 series engines a popular choice for manufacturers of excavators and other heavy machinery.