Track links wearing out early, a code 8002 on the display, or a dozer that will not move after a travel drive failure: this is the book for those jobs. It is the Liebherr Service Manual for the PR724, PR734, PR744, PR754, PR764 Litronic crawler dozers, Series 4, index issue 02.2010. It comes from Liebherr-Werk Telfs, runs 2567 pages and is in English.
Every day the dozer sits, you pay for an idle operator and the contract falls further behind. The book covers engine data by serial range, the hydrostatic travel and working hydraulics, and LinDiag diagnostics. It also covers the final drives, track and blade.
Check your F/N against the right engine and component pages before you call the dealer. Then the part you order is the one that fits.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 13-56 | Safety Guidelines, Service Items and Lubricants, Tightening Torques, Conversion Chart, Storage Guidelines, Weights |
| Special Tools / Application Guidelines | 57-90 | Special Tools, Repair Welding, Installation of Slip Ring Seals |
| Technical Data / Maintenance Guidelines | 91-192 | Technical Data per Model and Serial Range, Maintenance and Inspection Schedules and Guidelines |
| Engine | 193-220 | Engine Data Pages, Fan and Cylinder Configuration, Diesel Particle Filter Installation, Engine Mount |
| Coupling and Splitterbox | 221-244 | Engine Coupling, Splitterbox, Pump Output Couplings |
| Travel Hydraulic | 245-450 | Data Page, Description, Function, Test and Adjustment, Component Location |
| Working Hydraulic | 451-622 | Regulating Pump, Pilot Control, Control Valve Block, Quick Drop Unit, Overspeed Safety, Blade Release, Check and Adjustment |
| Hydraulic Components | 623-814 | Variable Pump, Variable Motor, Regulating Pump, Double Gear Pump, Control Valve Block, Hydraulic Cylinders |
| Electrical System - Plans | 815-1528 | Code Letter Explanations, Function List, Fuses, Current Flow Diagrams, Component Arrangement |
| Electrical System - Descriptions | 1529-1620 | Instrument Panel, LinDiag Diagnostic Software, Adjustments, Service Code Lists |
| Final Drive | 1621-1706 | Data Page, Design and Function, Sectional View |
| Track Components | 1707-1782 | Track Wear and Evaluation, Inspection Checklist, Track Pad Screw Torques, Track Roller Frame, Idler and Tension Unit |
| Attachments - Front and Rear | 1783-1856 | Straight Blade, 6-Way Blade, Hydraulic Cutting Angle Adjustment, Ripper |
| Main Frame Components | 1857-1894 | Cooler Arrangement, Hoist Cylinder Suspension, Equalizer Bar |
| Tank Arrangement | 1895-1950 | Hydraulic Tank, Fuel Tank, Battery Box |
| Operator's Platform | 1951-1980 | Heater and Blower, Air Conditioning, Operator's Seat |
| Special Equipment / Additional Documentation | 1981-2567 | Special Equipment, Travel and Working Hydraulic Schematics, Additional Electrical and Hydraulic Sheets |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| PR724 | ||
| PR724 engine (F/N 7697 to 9199) | Liebherr D924 TI-E A2, 4 cylinder in-line intercooled, 6.6 l, 118 kW (160 HP) to ISO 9249, rated 1800 rpm | p. 95 |
| PR724 engine (from F/N 9200) | Liebherr D934 L A6, 7.0 l, 120 kW (163 PS) to ISO 9249 | p. 97 |
| PR724 firing order (D924 TI-E A2) | 1-3-4-2 | p. 95 |
| PR724 fuel tank capacity | 365 l | p. 95 |
| PR724 travel pumps | 2 x HPV 105, max. 2 x 233 l/min, max. operating pressure 420 bar | p. 95 |
| PR724 track pad screws 3/4-16 UNF 12.9 (Intertractor, as of 2010) | 320 +/- 15 Nm + 120 degrees | p. 1710 |
| PR734 | ||
| PR734 engine (F/N 6200 to 8219) | Liebherr D926 TI-E A2, 9.96 l | p. 105 |
| PR734 engine (from F/N 8220) | Liebherr D936 L A6, 10.5 l, 150 kW (204 HP) to ISO 9249 | p. 107 |
| PR744 | ||
| PR744 engine | Liebherr D936 L A6, 10.5 l, 185 kW (252 HP) to ISO 9249 | p. 111 |
| PR754 | ||
| PR754 engine | Liebherr D946 L A6, 12 l, 250 kW (340 PS) to ISO 9249 | p. 113 |
| PR764 | ||
| PR764 engine (from F/N 9506) | Liebherr D9508 A7, 16.2 l, 310 kW (422 PS) to ISO 9249 | p. 117 |
| All Models | ||
| Track chain sag between idler and carrier roller | 30 to 40 mm, depending on track type | p. 135 |
