Liebherr L550 L556 L566 L576 L580 2plus2 Wheel Loader Service Manual – Complete PDF Repair Guide

Description

Liebherr L550 – L580 2plus2 Wheel Loader Service Manual

This is the complete service manual for the Liebherr L550, L556, L566, L576 and L580 2plus2 wheel loaders. It is written for mechanics and workshop staff whose job is to keep these machines ready for daily use. Across 1,018 pages the manual covers safety regulations, technical data, maintenance and inspection schedules, testing and adjustment procedures, and the repair of every major assembly on the machine — from the D934 S A6, D934 L A6 and D936 L A6 diesel engines through to the lift arms and the optional quick-change device. Every chapter is laid out by function group, with the layout, function and technical data of each component explained alongside the procedures themselves.

File Details

• Manual type: Service Manual
• Brand: Liebherr
• Models covered: L550, L556, L566, L576, L580 (2plus2)
• Language: English
• Page count: 1,018
• File format: PDF
• Order number: 1035 3357
• Document version: 02
• Manufacturer: LIEBHERR-WERK BISCHOFSHOFEN GMBH

Chapters Covered

• 1 General Information
• 2 Production Description
• 3 Maintenance
• 4 Diesel Engine, Splitter Box
• 5 Cooling System
• 6 Travel Hydraulics
• 7 Working Hydraulics
• 8 Steering System
• 9 Brake System
• 10 Electrical System
• 11 Transmission
• 12 Axles, Drive Shafts
• 13 Machine Frame, Ballast Weight
• 14 Central Lubrication System
• 15 Covering, Access
• 16 Cab, Heating, Air Conditioning
• 17 Lift Arms and Quick-Change Device
• 18 Equipment and Accessories
• 19 Service Codes, Diagnose
• 20 Options

General Information and Maintenance

Chapter 1 sets out the safety regulations that apply whenever work is carried out on the machine, the special tools required for maintenance and repair, the standard tightening torques for standard and fine metric threads, and the corrosion protection guidelines for decommissioning, deactivating and recommissioning the wheel loader. Chapter 2 provides the technical data of the complete machine and every individual assembly — dimensions, weights, tipping loads, bucket capacities, engine outputs, hydraulic pressures, flow rates, electrical ratings and axle ratios. Chapter 3 is the maintenance hub: the maintenance and inspection schedule, the testing and adjustment plan, the testing and adjustment checklists, lubrication charts, filling quantities, and the step-by-step procedures for every routine task from checking the engine oil level to changing the soot particle filter condensate separator. The testing and adjustment tasks in section 3.6 include SCULI-based calibration of the pedals, the block curve, the variable displacement motors and the engine output check.

Diesel Engine, Splitter Box, Cooling System and Transmission

Chapters 4, 5 and 11 cover the diesel engine and splitter box, the cooling system and the 2plus2 transmission. The engine chapter documents the D934 S A6 (L550), D934 L A6 (L556) and D936 L A6 (L566, L576, L580) engines with their electrical components, crankshaft and camshaft speed sensors, coolant and fuel temperature sensors, charge air temperature and pressure sensors, oil pressure sensor, fuel system, air filter system, coupling and splitter box. The cooling chapter describes both the built-in and the external air conditioning condenser variants, the hydraulic and electric fan speed control, the gear pump, gear motor and temperature sensor. The transmission chapter explains the mechanical 2plus2 transmission, the electronic control unit, the gear shifting solenoid valves, the speed sensors, the hydraulic control, the control valve block and the gear pump.

Travel Hydraulics and Working Hydraulics

Chapters 6 and 7 cover the travel hydraulics and the working hydraulics in full. The travel hydraulics chapter documents the variable displacement pump in both its up-to-serial-number and from-serial-number versions, the variable displacement motors, the scavenge pump, the overspeed protection solenoid valve and the hydraulic tank. The working hydraulics chapter covers the working hydraulics pump, the control block with its spool valves and pressure relief valves, the pilot control unit, the ride control system with stabilisation module and hydro accumulator unit, the lift and tilt cylinders, and the hydraulic tank filter unit and bleeder filter.

Steering System, Brake System and Electrical System

Chapters 8, 9 and 10 cover the steering system, the brake system and the electrical system. The steering chapter documents the steering pump, servostat, steering cylinder, steering damper hydro accumulator and the complete emergency steering system with its pump, pressure switches and valve block. The brake chapter covers the service brake gear pump, compact brake valve, service brake hydro accumulators, brake light pressure switch, accumulator charge pressure switch, parking brake, disc brake and overspeed protection. The electrical chapter includes the electrical system with circuit diagrams, the electrical components in the cab, the fuse and relay board A4, the main electronics (master) A15, the input and output modules, the battery installation and the electrical components in the rear section.

Axles, Drive Shafts, Machine Frame and Central Lubrication

Chapters 12 through 16 cover the axles and drive shafts, the machine frame and ballast weight, the articulation bearing, the oscillating axle mount, the articulation lock, the central lubrication system (manual and the optional LIEBHERR automatic system with EP-1 pump and MX-F progressive distributors), the covering and access, and the cab with heating, ventilation and air conditioning. The axle chapter alone covers three families — ZF MTL-I, ZF MTL-II and Dana Hercules — with differential, wheel hub, self-locking function and wet disc brake descriptions for each. The cab chapter covers both the LCD display unit A13 and the touch screen monitor A13a, plus the heating and air conditioning unit, blower, compressor, condenser, dryer collector unit, pressure switch and evaporator.

Lift Arms, Equipment and Service Codes

Chapters 17 through 20 cover the lift arms in both Z-kinematics and industrial configurations, the pin bearing and bucket bearing, the quick-change device, the loading bucket, forklift, connection sizes, equipment and accessories, the service codes and diagnostics, and the optional joystick steering. Chapter 19 is especially useful for anyone diagnosing a machine: it contains the full service code tables for CRITICAL, ERROR, ERROR Motor and WARNING codes, with effect, cause and remedy columns, plus troubleshooting guidance for the 2plus2 transfer gear. The manual also includes the option of joystick steering in chapter 20.

What This Liebherr L550 – L580 2plus2 Service Manual Enables

This is the reference a workshop needs to service, diagnose and repair any of the five wheel loader models in the L550 – L580 2plus2 range. With the technical data, tightening torques, maintenance schedules, testing and adjustment plans, hydraulic schematics, electrical circuit diagrams and service code tables all in one document, the technician can work to the correct procedures and the correct values rather than guessing. The manual covers the engine, cooling, travel hydraulics, working hydraulics, steering, brakes, electrical system, transmission, axles, machine frame, central lubrication, cab, lift arms and attachments. If a machine comes into the workshop with a service code, a leak, a slow hydraulic function or a transmission fault, this manual gives you the data and the procedure to trace the problem and put it right.

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Delivered as an instant PDF download, the manual is available on any device — laptop, tablet or smartphone — and can be printed for the workshop shelf or taken directly to the machine. No shipping, no waiting. Once payment is confirmed, the file is ready to download.