Part of the New Holland Repair Manuals.
Working on a dead wheel loader? This 527-page New Holland LW 50 technical manual PDF (OEM #73179329) breaks down the complete travel drive, axles, and hydrostatic working hydraulics for your machine. Inside, you get full wiring diagrams to trace electrical faults, detailed hydraulic circuit schematics, and extensive troubleshooting charts to isolate pressure drops fast. Open up step-by-step tear-down procedures covering everything from the priority steering valve to the brake accumulator and lifting cylinders. Lock down the front axle mounting with exactly 670 Nm (495 lb-ft) of torque, and verify the variable pump displacement is hitting exactly 40 cc/rev before closing the system. Wasted shop time kills your profit margin. Download this bookmarked file directly to your rugged tablet, navigate straight to the repair you need, and get that loader pushing dirt again.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 3-15 | Safety Instructions, Warnings and Symbols, Organizational Measures, Special Dangers, Repair Work Safety |
| Service Data | 16-55 | Si Units, Conversion Tables, Calculation Examples, Tightening Torques, Service Fluids, Approximate Weights |
| Engine | 57-70 | Engine Specifications, Repair Instructions, Assisted Starting, Welding Operations |
| Travel Drive | 71-95 | Hydraulic System Safety, Hydrostatic Drive Principle, Pressure Measuring Points, Adjustment Procedures, Hydraulic Pump Repair |
| Axles | 176-270 | Axle Design, Filling Quantities, Dismantling Procedures, Brake Assembly, Differential Assembly, Special Tools |
| Steering | 271-289 | Hydraulic System Safety, Circuit Diagrams, Functional Description, Priority Valve, Steering Cylinder, Testing and Adjustment |
| Brakes | 290-308 | Safety Instructions, Braking System Circuit, Accumulator Charging, Pedal-Type Brake Valve, Checking Brake Disks, Bleeding System |
| Working Hydraulic System | 309-333 | Hydraulic System Safety, Functional Description, Control Block, Lifting Cylinder, Dumping Cylinder, Testing and Adjustment |
| Electrical System | 334-451 | Fundamentals of Electrical Engineering, Battery Charging, Troubleshooting, Wiring Diagrams, Fuses, Terminal Designations |
| Frame | 452-457 | Frame Components, Safety Instructions, Repairing Loader Frame, Exchanging Main Pivot Parts, Mounting Procedures |
| Fittings, Pipes and Hoses | 458-507 | Safety Instructions, Materials for Lines, Pipe Couplings, Flange Couplings, Assembly Aids, Gauge Connections |
| Sealing, Protective, Testing and Cleaning Agents | 508-527 | Preservation of Gearboxes, Preservation of Piston Rods, Surface Sealing Agents, Liquid Thread Adhesives, Lubricants, Surface Crack Checking |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine - repair instructions | 10 | p. 3 |
| Working hydraulic | 08 | p. 320 |
| Front axle mounting Tightening torque | 670 Nm (495 lbft) | p. 67 |
| Rear axle mounting (Pin mounting) Tightening torque | 79 Nm (58 lbft) | p. 67 |
| Variable pump Displacement | 40 cc / rev. | p. 63 |
| Variable pump Power requirement max. | 38.5 kW | p. 63 |
| Hydraulic cylinder hoist times (shovel empty) lifting | 6 Sec. | p. 61 |
| Hydraulic oil temperature for testing and adjusting work | 60-70°C (140 - 160°F) | p. 81 |
| Pressure gauge measuring range for checking mechanical zero position | 600 bars / 8700 psi | p. 81 |
| Feed pressure limit | ca. 25 bars (360 psi) | p. 78 |
| Travelling pressure at engine speed of ca. 1100 rpm | ca. 50 bars (725 psi) | p. 78 |
| Pressure gauge measuring range for checking high-pressure relief valves | 600 bars / 8700 psi | p. 83 |
