Liebherr R900B R904 R914 R924 R934 R944 R934B R944B Litronic Hydraulic Excavator Service Manual 8504335

Description

Liebherr R900B R904 R914 R924 R934 R944 R934B R944B Litronic Hydraulic Excavator Service Manual 8504335

This extensive service manual provides technical information for the Liebherr Litronic hydraulic excavator range identified on the manual cover as R900B, R904, R914, R924, R934, R944, R934B and R944B. It is a workshop-oriented reference covering the machine from general service information and technical data through diesel engines, hydraulic systems, electrical controls, swing and travel components, attachments, cab systems and lubrication equipment.

The manual is especially detailed in areas that require measured adjustment rather than simple component replacement. Hydraulic check lists provide test points, nominal pressures and adjustment procedures, the electrical section contains monitoring-display information and error-code coverage, and the engine chapters include specifications, capacities, operating values, tightening data and service limits. Machine-specific technical data is separated by model and serial-number starting points where applicable.

File Details

• Manual type: Service Manual
• Brand: Liebherr
• Models: R900B, R904, R914, R924, R934, R944, R934B, R944B Litronic
• Document identification: 8504335
• Issue shown on cover: March 2002
• Language: English with multilingual material in selected sections
• Page count: 1233 pages
• File format: PDF

Machine and Serial Coverage

The technical-data and system sections identify different starting serial numbers for individual machines. Coverage visible in the manual includes R900B from 6001, R904 from 6001, R914 from 6001, R924 from 6001, R934 from 5001 and R944 from 5001. Updated B-series information is also included for R934B from 9995 and R944B from 9872, with later electrical and attachment sections showing additional serial break points where the equipment or circuitry changed.

This matters when servicing these excavators because the manual does not treat every machine as mechanically identical. Hydraulic arrangements, electrical diagrams, monitoring functions, engine installations and optional equipment can differ by model and production stage, so the model-specific pages and serial references help the technician select the relevant procedure or diagram.

Technical Data, Maintenance and Service Values

A substantial technical-data section provides model-by-model information for major machine systems. Depending on model, the data includes machine weight, dimensions, engine ratings, hydraulic pump information, working pressures, cylinder sizes, swing system data, travel equipment, electrical system values and track information. The maintenance pages provide scheduled work for diesel engine, hydraulic system, electrical system, swing gear, swing ring, travel gear, tracks, cab and attachments.

The manual also contains lubrication and fuel specifications, viscosity guidance, antifreeze information, hydraulic oil requirements and oil-change guidance. Tightening sections include metric fastener torque data and specific hydraulic fitting and plug torque tables. These sections are useful during routine servicing as well as major disassembly and reassembly work, where the correct lubricant, pressure or tightening value is essential.

Diesel Engine Service Information

The engine chapters include data for the Deutz BF4M1013E installation and Liebherr diesel engine types including D924T-E A1, D924T-E A2 and D926T-E A2. Information shown in the manual includes engine performance, bore and stroke, displacement, firing order, compression data, operating speed ranges, valve clearances, oil and coolant capacities, oil pressure, coolant temperature, injection pressure, tightening sequences and major engine fastener torque procedures.

Engine coverage is tied to the applicable excavator models, making the Liebherr R900B R904 R914 R924 R934 R944 R934B R944B Litronic Hydraulic Excavator Service Manual 8504335 useful when confirming which engine specification or adjustment belongs to a particular machine rather than relying on a generic engine reference.

Hydraulic Testing, Adjustment and Repair

Hydraulic servicing is one of the strongest parts of this manual. The hydraulic-system chapters include adjustment check lists, system descriptions, pressure-adjustment procedures and hydraulic diagrams. The manual identifies test points and nominal values for servo pressure, horsepower regulation, working pumps, pressure cut-off, primary and secondary relief valves, swing circuits and attachment functions.

For the larger machines, the adjustment procedures show how to check pump P1 and P2, establish hydraulic regulation beginning pressure, set pressure cut-off, verify engine output under hydraulic load and check secondary relief settings for boom, bucket, stick and travel functions. The R934/R934B and R944/R944B sections also contain detailed swing-pump checks and hydrostatic cooler-fan test data. Separate variable-displacement pump instructions explain pressure cut-off adjustment using pump positioning-pressure and high-pressure test points.

Electrical System and Monitoring Diagnostics

The electrical section covers components, wire references, monitoring displays, control units and basic or optional electrical diagrams. Later pages include different electrical-diagram sets according to model and serial break. The monitoring-display material explains engine coolant and fuel indications, warning lights, LCD display operation, machine information menus and stored errors.

Error-code charts include electrical faults relating to engine oil monitoring, coolant level and temperature, hydraulic oil level and temperature, transmission temperature, engine speed, pump-regulation solenoids, joysticks and other control circuits. The display section also explains technician-level menus used to inspect operating hours, hydraulic pump status, inputs and outputs, error memories, engine information, pump settings and machine-specific parameters.

Special Attachments and Tool Control

The manual contains dedicated sections for load check valves, overload-warning equipment, quick-change adapters, flow limitation, hydraulic hammers and additional hydraulic installations. AHS11 and AHS12 tool-control chapters describe hydraulic installations for attachments such as hydraulic hammers, hydraulically adjustable booms, telescopic demolition sticks, scrap shears and concrete crushers.

These chapters explain the relationship between pedal controls, control-valve spools, pressure switches, pump regulators and solenoid valves used to limit hydraulic flow and pressure for the selected attachment. Adjustment sections provide pressure-relief settings and pressure-check procedures for the additional hydraulic circuits.

Special Tools

Dedicated special-tool pages identify equipment for hydraulic excavator repair, Liebherr and Deutz diesel-engine adjustment, hydraulic-system work, electrical connector service, gears and axles. The manual includes pictorial tool charts, tool numbers, dimensions and application information, along with dedicated drawings for items such as hydraulic-cylinder piston wrenches, swing-gear tooling, brake-housing mounting devices and slipping-seal installation tools.

IMAGES PREVIEW

Chapters Covered

• 1. General Information – modification information, safety, conversion factors, tightening torques and lubrication
• 2. Tools – maintenance and repair tools for excavators, diesel engines, hydraulics, electrical connectors, gears and axles
• 3. Technical Data / Maintenance Guidelines – machine technical data, maintenance schedules and lubrication charts
• 4. Engine – Deutz and Liebherr diesel-engine technical data, service limits, operating values and torque procedures
• 5. Coupling / Splitterbox
• 6. Hydraulic System – adjustment check lists, system descriptions, pressure adjustments and hydraulic diagrams
• 7. Hydraulic Components – pumps, control components and component repair information
• 8. Electrical System – electrical components, wire references, monitoring display, control units and electrical diagrams
• 9. Swing Gear
• 10. Swing Ring
• 11. Travel Gear / Two Speed Gear Box
• 12. Track Components / Axles
• 13. Steering System
• 14. Oscillating Axle Stabilizer
• 15. Brake System
• 16. Special Attachments / Additional Hydraulic Installations – overload warning, quick-change adapter, flow limitation, hydraulic hammers and AHS hydraulic installations
• 17. Cab Heater / Air Conditioning System
• 18. Undercarriage / Uppercarriage Attachments – centralized lubrication and related equipment
• 19. Arrangement of Tanks

Taken together, these chapters give the technician a broad machine-level service reference instead of a manual limited to one component family. Mechanical repair information is supported by hydraulic adjustment values, electrical diagnostics, technical specifications, maintenance requirements and model-specific system documentation.

Centralized Lubrication System

Later sections provide extensive servicing information for the centralized lubrication system used on applicable models. The manual explains manual and automatic centralized lubrication, lubrication-point layouts for different equipment configurations, troubleshooting, electric pump operation, controller settings and emergency lubrication. It also covers SXE-2 and MX-F progressive distributors, including their internal operating sequence, dosing elements, outlet combinations, sensors, service parts and assembly details.

Service, Diagnose and Repair with the Correct Technical Reference

The Liebherr R900B R904 R914 R924 R934 R944 R934B R944B Litronic Hydraulic Excavator Service Manual 8504335 supports a wide range of workshop tasks, from scheduled maintenance and lubrication through engine adjustment, hydraulic pressure testing, pump and valve setting, electrical fault diagnosis, swing and travel system service, special-attachment setup and centralized lubrication repair. Having the correct model-specific procedures, pressure values, service limits, tightening data and diagrams available can make complex diagnosis and repair work far more systematic and reduce the risk of using settings intended for a different machine or production stage.

After purchase, the manual is delivered as an instant PDF download. There is no physical book or shipping delay. The PDF can be opened on a computer, tablet or phone and pages can be printed when a paper reference is useful at the machine or workbench.