Within the hour you might be measuring swing ring tilting clearance or pulling the double variable-displacement pump, and this 818-page Liebherr R 914 C, R 924 C service manual PDF is written for that work on both hydraulic excavators. Hydraulic components fill the largest chunk of the book, covering pump installation and dismantling, the fixed-displacement motor and the cylinders, while the hydraulic diagram, adjustment check list and electrical diagram let you trace a circuit and set it to factory values. Swing gear, travel gear brake, track tensioning unit, cab heating and air conditioning, the AHS installation kit and a long central lubrication section round it out. Change the 10 µm hydraulic return filter at 500 operating hours and every 500 after that, and torque the Allen head screws 41 to 87 Nm. Swing ring backlash checks go nowhere without the factory limit. Bookmarks and a live text layer put you on the right section in two clicks.
What's Inside This Liebherr R 914 C, R 924 C Manual
| System | Pages | Key Topics |
|---|
| General Information | 5-58 | Safety Instructions, Tightening Torques, General Instructions for Lubricants |
| Tools | 59-118 | Special Tools for Maintenance, Special Tools for Diesel Engine, Special Tools for Hydraulic System |
| Technical Data / Maintenance Guidelines | 119-144 | Technical Data, Inspection and Maintenance Schedule, Lubrication Chart |
| Engine | 145-150 | Technical Data for Engine |
| Coupling / Splitterbox | 151-158 | Coupling, Splitterbox |
| Hydraulic System | 159-186 | Adjustment Check List, Hydraulic Diagram |
| Hydraulic Components | 187-326 | Installation and Dismantling of Pumps, Double Variable-Displacement Pump, Hydraulic Fixed-Displacement Motor, Hydraulic Cylinders |
| Electrical System | 327-371 | Arrangement of Components, Electrical Diagram |
| Swing Gear | 372-373 | Swing Gear Transmission, Swing Brake, Hydraulic Motor, Secondary Pressure Relief Valve, Slotted Nut, Mounting Device |
| Swing Ring | 374-383 | Ball Track Lubrication, Swing Ring Teeth, Tilting Clearance, Circumferential Backlash, Outer Ring, Internal Ring |
| Travel Gear | 384-395 | Travel Gear Brake, Slide Ring Seal |
| Track Components | 396-431 | Wear of Travel Gear Parts, Dismantling and Installing Travel Gear, Tensioning Unit |
| Options | 432-590 | Hydraulic Installation Kit AHS, Schematics Chart for Options |
| Cab / Heater / Air Conditioning System | 591-648 | Auxiliary Heating, Heating and Air-Conditioning System |
| Central Lubrication | 649-818 | Centralized Lubrication System, Pump of Centralized Lubrication, Progressive Distributor |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| R 914 C / R 924 C with DPVP 108 pump (from serial 23079 / 23085) |
| Allen head screws 41 torque | 87 Nm | p. 200 |
| Screw plug 1 / 9 torque | 35 Nm | p. 204 |
| Sealing nut 7 torque | 18 Nm | p. 204 |
| Flow regulator 24.5 installation torque | 5 Nm max. | p. 205 |
| All Models |
| Hydraulic oil return filter (20 / 5 µm) replacement interval | first change after 500 operating hours, then every 1000 operating hours | p. 51 |
| Hydraulic oil return filter (10 µm) replacement interval | first change after 500 operating hours, then every 500 operating hours | p. 51 |
| R 924 Compact |
| Cylinder head screws 6 torque | 68 Nm | p. 191 |
| Hexagon head screws 12 torque | 68 Nm | p. 191 |
| R 914 C / R 924 C with hydraulic installation kit AHS 12 |
| Stroke limitation of control piston 503 Dimension Y of stop screw 500.1 | 8.5 mm | p. 437 |
| Stroke limitation of control piston 503 Dimension Y of stop screw 500.2 | 8.5 mm | p. 437 |
| R 914 C / R 924 C with AHS 11 with Tool Control |
| Pressure cut-off 101 | 350 +10 bar | p. 448 |
| Secondary pressure relief valve 501 (Extend cylinder 511, EV6 at 0%) | 100 ±10 bar | p. 449 |
