Liebherr L550, L556, L566, L576 & L580 2plus2 Wheel Loader Service Manual, 2006–2011 (P/N 1035 3357)

The Liebherr Service Manual, P/N 1035 3357, Document Version 02, covers Series 6 L550, L556, L566, L576, and L580 2plus2 wheel loaders.

PDF Search, Diagram Viewing and Page Breakdown

Search and drawing detail: PDF text search and embedded bookmarks are unavailable. Electrical sheets are oriented sideways; their fine, light-colored lines and small connector and wire labels require rotation and zooming.

One printable 758-page PDF, including 8 preliminary pages, 744 pages of main chapters and section blanks, and 6 appended, unnumbered hydraulic schematic sheets.

Hydrostatic Drive, Machine Controls and Service Procedures

These selected topics highlight workshop procedures and technical references; other sections cover articulation bearings, ballast layout, and cab access.

• Engine and cooling service: Oil and filter changes, fuel bleeding, valve-clearance adjustment, V-ribbed belt replacement, and fan-control testing.

• Hydrostatic travel drive: SCULI pedal, pump block-curve, and travel-motor calibration, with replenishing-pressure, relief-valve, pressure cut-off, and engine-output checks.

• Working hydraulics and steering: Pump flow-control and LS pressure checks, control-block relief-valve testing, ride-control depressurization, and steering-pump adjustment procedures.

• Brakes and transmission: Brake-pressure, accumulator-capacity, charge-pressure, and switch tests, plus transmission shift-pressure and accumulator checks.

• Electrical diagnosis: Wiring diagrams, connector and ground-point references, service-code tables, and addressing procedures for replacement CAN input and output modules.

• Cab and HVAC configurations: A13 LCD and A13a touch-screen controls, with separate descriptions and cooling-circuit diagrams for built-in and external condensers.

• Lift arms and attachments: Step-by-step procedures for pin removal, bushing replacement, and bucket-bearing assembly, plus quick-change device testing and attachment connection drawings.

Written for mechanics and workshop staff responsible for keeping these loaders ready for service, especially personnel at Liebherr dealers and branches.

Machine Matching and Repair Scope

Model, product-number, and serial applicability in the section headings help technicians select the correct circuit, component view, and test routine before ordering parts or beginning repair work. Travel and working hydraulics have separate layouts for L550/L556 and L566/L576/L580; the axle chapter distinguishes the L580 2plus2 from the smaller loaders.

Powertrain specifications identify the D934 S A6, D934 L A6, and D936 L A6 engines and their applicable machines. Component sections explain the pump distributor gear, hydrostatic pumps and motors, mechanical 2plus2 transmission, axles, and drive shafts.

Overhaul boundary: This edition emphasizes maintenance, system operation, inspection, testing, calibration, and diagnosis. Its component cross-sections do not constitute complete internal overhaul procedures for the engines, transmission, axles, hydraulic pumps, or motors.

The master contents lists Options, but no separate Chapter 20 is supplied.

Maintenance Records and Hydraulic Testing

The 40-page technical-data section is supported by maintenance schedules, lubrication charts, filling-quantity tables, approved-fluid specifications, and wear checks. Separate adjustment checklists identify test connections and provide spaces for readings before and after adjustment.

Hydraulic references include the Hydraulic Plan of the Travel Hydraulics, Hydraulic Diagram of the Working Hydraulics, and Hydraulic Diagram of the Steering System. Servostat, control-block, cylinder, pump, and motor section views show the associated internal components and oil paths.

Cooling-system descriptions connect fan control with hydraulic-oil, coolant, and charge-air temperature signals. Optional soot-particle-filter coverage includes counterpressure monitoring, condensate handling, and cleaning; excessive test pressure can permanently damage the electronic counterpressure monitor.

Electrical Circuits and CAN Module Replacement

The electrical drawing section contains 115 sheets, including circuit diagrams, component indexes, connector references, and symbol keys. It covers wiring harnesses, ground points, fuse and relay board A4, master electronics A15, input modules A16a–A16d, output modules A17a–A17d, battery installation, and engine-ECU connections.

Module replacement coverage includes address selection, LED status interpretation, and SCULI module-editor and module-test screens. These references support checking module identity and CAN communication after installation.

Chapter 19 links CRITICAL, ERROR, ERROR Motor, and WARNING codes with operating effects, causes, and remedies. Audible and visual warning tables supplement the codes.

The 2plus2 transfer-gear troubleshooting section links gearbox pressure checks with travel-hydraulic adjustment, oil level, and operating temperature. Its Diagram of the Hydraulic Gearbox Control Unit identifies the relevant control circuits.

Cab Controls, HVAC and Attachment Details

The A13 LCD and A13a touch-screen arrangements have separate display and control references. HVAC sections distinguish condenser configurations by model and serial applicability, with cooling-circuit diagrams and descriptions of the compressor, dryer-collector, expansion valve, and anti-icing sensors.

Z-lift geometry, bucket and forklift specifications, and direct-attach versus quick-change connection drawings support attachment matching. The pin-bearing section includes dimensioned extractor-hammer and pushing-tool drawings alongside its repair procedures.

Damaged bucket-bearing sealing lips admit contamination, increasing wear at the bushings and pins. The bearing instructions explain seal preparation and assembly clearance in that context.

Workshop Tools and Safety

SCULI testing calls for USB dongle 10333608 and diagnostic data cable 10035410, together with the specified pressure gauges and test lines.

The tool tables identify diesel-engine compression and installation tools, hydraulic-cylinder seal sleeves, axle and L580 Hercules tooling, and transmission coupling tools. Separate entries cover BEKA/Groeneveld lubrication fillers, A/C evacuation and test equipment, and the cab-glass suction kit.

Work involving raised lift arms, stored hydraulic or accumulator pressure, brake testing, battery isolation, rotating components, and refrigerants requires trained personnel and the support and safety precautions specified in the manual.

Sample Engine and Parking-Brake Inspection Data

Valve and heater checks: For the D934 and D936 engines, the valve-adjustment section specifies cold clearances of 0.30 mm intake and 0.40 mm exhaust. The heating-flange test specifies a resistance of 0.25 ohm ±10% at 20°C.

Parking-brake wear: The inspection section specifies a minimum lining thickness of 1.0 mm and distinguishes lining wear from the separately adjustable brake clearance.