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Part of the New Holland Repair Manuals.
Looking for the New Holland W50–W80 Series Repair Manual PDF? This factory repair manual (OEM #87734623C) runs 482 pages and covers the W50BTC, W60BTC, W70BTC, and W80BTC wheel loaders in one book. Separate hydraulic diagrams for every model, with and without optional outfits, plus a full electrical section: wiring diagrams, fuse and relay layouts, and voltage and continuity checks. Also inside: complete front and rear axle teardowns, brake pressure checks, and step-by-step rebuilds for the variable-displacement piston pump and travel motor. Set the primary working attachment relief at 250 bar, then torque the drive shaft pulley to 350 Nm before reassembly. Your loader is down and the axle is in pieces on the bench. Get the factory numbers, not forum guesses. Bookmarked and keyword-searchable; pull it up on any device and start wrenching.
What's Inside This Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 1-34 | Safety Instructions, General Safety Instructions |
| Engine | 35-42 | Diesel Engine, Fuel System, Cold Start Device |
| Front Axles | 43-140 | Disc Brake Assy, Brake Caliper, Reduction Gear, Wheel Hub, Wheel Shaft, Differential Support, Differential Assy, Pinion, Oil Change, Troubleshooting |
| Rear Axles | 141-252 | Motor TB150, Motor TB138.5 High Speed, Transmission Box TB150, Transmission TB138.5 High Speed, Reduction Unit, Wheel Hub, Limited Slip Differential Assy, Pinion, Oil Change, Troubleshooting |
| Brake System | 253-272 | Brake System Diagram (Standard Diagram, High Speed Diagram), Technical Specifications (Brake Pedal Valve, Pressure Switches) |
| Hydraulic System | 273-344 | Hydraulic Diagrams (W50BTC, W50BTC with Optional Outfits, W60BTC, W60BTC with Optional Outfits, W70BTC, W70BTC with Optional Outfits, W80BTC, W80BTC with Optional Outfits) |
| Frame | 345-350 | Articulated Joint (Components, Disassembly and Assembly) |
| Steering System | 351-386 | Operation (Emergency Steering, Pressure Adjustment), Power Steering (Technical Specifications, Components, Disassembly and Assembly, Troubleshooting, Special Tools) |
| Heating and Air Conditioning System | 387-420 | Heating, Air Conditioning, Troubleshooting |
| Electrical System | 421-452 | Electrical Diagrams, Fuses and Relays, Voltage and Continuity Check, Battery (Replacement), Bulbs, Troubleshooting |
| Working Equipment | 453-482 | Hydraulic Diagram, Operation, Removal and Installation, Quick Tool Coupler (Components, Cylinders), Bucket (Assembly, Disassembly, Teeth - Replacement) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Oil pan plug | 50 Nm (36.87 lbf·ft) | p. 24 |
| Cylinder head - 1st phase (M12) | 65 Nm (47.94 lbf·ft) | p. 24 |
| Primary safety pressure (Working attachment) | 250 bar (3625 psi) | p. 26 |
| Secondary safety pressure - tilt dumping cylinder bottom side | 280 bar (4059 psi) | p. 26 |
| Tightening torque for screws (9) | 50 Nm (36.87 lbf·ft) | p. 61 |
| Tightening torque for screws (4) | 169 Nm (124.64 lbf·ft) | p. 63 |
| Maximum compressed air pressure for cleaning heat exchanger | 7 bar | p. 390 |
| Battery (without cold start) Weight (with electrolyte) | 25 kg (55 lb) | p. 444 |
| Battery (with cold start) Weight (with electrolyte) | 18 kg (40 lb) | p. 444 |
| Engine Oil Capacity (without filter) | 8.5L | p. 33 |
| Cooling System Capacity | 16.5L | p. 33 |
| Fuel System Capacity | 95L | p. 33 |
