Fits the Liebherr R 900 C Litronic and R 904 C Litronic crawler excavators, both powered by the D 924 TI E A2 engine. The R900C runs an LPV 150 pump at 88 kW. The R904C gets a DPVO 165 and 99 kW. This is Liebherr order number 10069965, issue 01/2008, in English.
On a 20 t excavator, a guessed torque or pump setting can cost you a head gasket or a pump, plus a day with the crew standing still. This book gives you the factory figures, the test points and the adjustment check lists for both machines.
The main group index covers groups 1 to 18. It starts with general information and runs through the engine, LSC hydraulics, BST electrics, swing, travel, undercarriage, options and the schematic sheets. Find your group in the index, turn to it and start work.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Service Manual Index | 1-5 | Main Group Index for Groups 1 to 18 |
| General Information | 6-59 | Safety Instructions, Servicing the Machine Safely, Crack Testing, Tightening Torques, Assembly of Pistons and Piston Nuts, Piston Rod Bearings, Preloads and Tightening Torques (DIN 13), Fuel and Lubricants |
| Tools | 60-121 | Special Tools for Maintenance and Repair, Special Tools for the Hydraulic System and Electrical Connectors, Common Tools, Hydraulic Cylinder Mounting Tools, Swing Gear Slotted Nut Wrench, Travel Gear Disc Brake Mounting Device |
| Technical Data and Maintenance Guidelines | 122-151 | Technical Data R 900 C Litronic and R 904 C Litronic, Maintenance and Inspection Chart, Lubrication Charts R900C and R904C |
| Diesel Engine | 152-157 | Technical Data D 924 TI-E, Performance Data, Filling Amounts, Cooling System Values, Tightening Torques on the Diesel Engine, Cylinder Head Torque Schedule |
| Coupling and Splitterbox | 158-163 | Elastic Coupling (Torsion Damper) Job Definition, Design and Function, Removal and Installation of the Coupling |
| Hydraulic System | 164-241 | Adjustment Check Lists R 900 C and R 904 C Litronic, LSC System, Layout of the Hydraulic System, Setting Instructions, Checking and Adjusting the Variable Displacement Pumps, Hydraulic Scheme Basic Excavator |
| Hydraulic Components | 242-449 | Variable Displacement Pumps LPV and DPVO, Fixed Displacement Motor FMF, Variable Displacement Motor FMV, Hydraulic Cylinders, Extension and Retraction Speeds, 1-Way, 2-Way and 4-Way Servo Controls, LSC Control Valve Block, Rotary Connections, TC Valve, Travel Motor Brake Valve |
| Electrical System | 450-610 | Arrangement of Components, Excavator Control BST, Monitoring Display Upwards of V5.5 with Error Code Charts, Control Unit S2, Summary of Error Codes, Faults and Remedies, Electrical Scheme Basic Excavator |
| Swing Gear | 611-630 | Swing Gear SAT, Swing Gear Brake |
| Swing Ring | 631-640 | Ball Swing Ring |
| Travel Gear | 641-660 | Travel Gear Transmission, Travel Gear Brake |
| Track Components | 661-696 | Wear of Track Components, Dismantling and Installing Track Components, Berco Idler, Tensioning Unit, Track Roller, Carrier Roller |
| Options | 697-936 | Load Holding Valves for Hoist Cylinders, Hydraulic Installation Kits AHS 11 and AHS 12 with and Without Tool Control, Hydraulic Schematics for Options, Electric Schematics for Options |
| Cab, Heater and Air Conditioning | 937-994 | Auxiliary Heating with Troubleshooting by Fault Code, Heating and Air-Conditioning System |
| Central Lubrication | 995-1044 | Centralized Lubrication System, Lubrication Pump, Progressive Distributors SX-E and MX-F |
| Schematic Sheets | 1045-1265 | Hydraulic and Electrical Schematic Sheets for the Basic Machine and Options, With Legend Sheets |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| R900C, R904C Litronic | ||
| Engine type | D 924 TI E A2 | p. 124 |
| Engine oil quantity (oil change with filter) | 23 l | p. 124 |
| Max. swing speed | 9,0 rpm | p. 125 |
| Swing gear oil quantity | 5,0 l | p. 125 |
| Operating voltage | 24 V | p. 125 |
| Batteries | 2 x 92 Ah (series connection) | p. 125 |
| Alternator | 28 V / 55 A | p. 125 |
| Starter | 24 V / 5.4 kW | p. 125 |
| Track pad width | 500 / 600 / 750 mm | p. 126 |
| All Models | ||
| Engine output (DIN ISO 9249) | 88 kW (120 HP) (R900C Litronic) / 99 kW (135 PS) (R904C Litronic) | p. 124 |
| Nominal engine speed | 1800 rpm (R900C Litronic) / 2000 min-1 (R904C Litronic) | p. 124 |
| Fuel tank | 300 l (R900C Litronic) / 340 l (R904C Litronic) | p. 124 |
| Max. pump flow | 270 l/min (R900C Litronic) / 330 l/min (R904C Litronic) | p. 124 |
| Max. travel speed (normal / fast) | 2.4 / 5.0 km/h (R900C Litronic) / 2,6 / 5,2 km/h (R904C Litronic) | p. 125 |
| Digging / breakout force | 100.6 / 125.7 kN (R900C Litronic) / 97 / 141 kN (R904C Litronic) | p. 124 |
| R904C Litronic | ||
| Max. engine torque | 730±10 Nm at 1000 min-1 | p. 128 |
| Hydraulic oil quantity (oil change with filter) | ca. 290 l | p. 128 |
| Travel gear oil quantity | 2x4,1 l | p. 129 |
| Operating weight (Std, type 984) | 20,6 t | p. 128 |
| R900C Litronic | ||
| Operating weight (Std, type 971) | 19,3 t | p. 124 |
