Part of the New Holland Repair Manuals.
Fixing the hydrostatic drive on your New Holland Construction LW 80 Wheel Loader requires the right data, and this 541-page technical manual (OEM #73179332) gives you every factory procedure. Open the file to find complete hydraulic schematics for the lifting and steering circuits, alongside detailed wiring diagrams for the entire electrical system. You get step-by-step teardown instructions for the axles, brakes, and control blocks, plus dedicated troubleshooting charts to track down stubborn faults. Verify your boom performance by checking the empty bucket lifting time against the factory 6.3-second standard, then confirm the cooling system is topped off with exactly 18.5 liters of fluid. Stop wasting hours bleeding brake valves blind. Grab this indexed PDF on your tablet, find the exact schematics you need, and get that loader pushing dirt again.
What's Inside This New Holland LW 80 Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 3-15 | Safety Instructions, Warnings and Symbols, Repair Work, Accumulators, Engine Safety, Welding Operations |
| Service Data | 16-55 | Si and Additional Units, Conversion Tables, Calculation Examples, Tightening Torques, Temperature Units |
| Engine | 56-70 | Engine Specifications, Axles and Transmission Gears, Travel Speeds, Hydraulic System Data, Service Fluids, Approximate Weights |
| Travel Drive | 71-97 | Hydraulic System Safety, Circuit Diagrams, Hydrostatic Drive Principle, High Pressure Adjustment, Repair Instructions |
| Axles | 186-280 | General Design, Maintenance, Filling Quantities, Dismantling Procedures, Assembling Procedures, Tightening Torques |
| Steering | 281-299 | Hydraulic System Safety, Circuit Diagrams, Steering System Overview, Functional Description, Priority Valve, Steering Cylinder, Steering Valve |
| Brakes | 300-318 | Safety Instructions, Braking System Circuit, Functional Description (Service, Auxiliary, Parking Brake), Accumulator Charging Valve, Pedal-Type Brake Valve, Bleeding System |
| Hydraulic System (Working Hydraulics & Cooling) | 319-347 | Safety Instructions, Working Hydraulics Circuit, Functional Description, Control Block, Lifting/Dumping/Locking Cylinders, Hydraulic tank/filter, Testing and Adjustment |
| Electrical System | 348-465 | Electrical Components, Fundamentals of Electrical Engineering (Battery, Alternator, Motors, Circuits), Interpretation of Wiring Diagrams, Troubleshooting, Fuses, Schematic Symbols |
| Frame | 466-471 | Safety Instructions, Repairing Loader Frame, Exchanging Main Pivot Parts, Articulated Joint Assembly |
| Fittings, Pipes and Hoses | 472-521 | Safety Instructions, Materials for Pipes and Hoses, Line System Conditions, Steel Pipes (Cutting, Bending), Hoses (Fitting, Routing) |
| Sealing, Protective, Testing and Cleaning Agents | 522-541 | Safety Instructions, Preservation (Gearboxes, Piston Rods), Corrosion Protection (Pins, Bearings), Sealing Agents (Surface, Thread), Adhesives (Metal, Plastics, O-Rings) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine - repair instructions | 10 | p. 3 |
| Working hydraulic | 08 | p. 336 |
| Hydraulic cylinder lifting times (bucket empty) lifting | 6,3 Sec. | p. 61 |
| Cooling system capacity | 18.5 (5) litres (gal) | p. 66 |
| acid-protection grease | Ft 40 v 1 | p. 63 |
| Battery plus | B + | p. 391 |
| Permissible tolerances for hose length alteration under high pressure | -4% to +2% | p. 487 |
| Engine Rated Output | 56 kW | p. 59 |
| Engine Rated Speed | 2200 rpm | p. 59 |
| Engine Oil Pressure | 2.8 bar | p. 59 |
New Holland LW 80 Common Problems This Manual Covers
New Holland LW 80 engine overheating during heavy load operation, coolant temperature climbing past normal range
Check coolant level against the 18.5 liter cooling system capacity in the maintenance chart on page 66; top off with the correct mix if low. Inspect the radiator core for debris and clean it out. At max engine speed, verify fan speed reaches at least 2750 min-1 per the cooling check on page 342.
Manual Section: Engine p. 342Bucket won't lift or lift arm motion feels weak and sluggish under load
Connect a pressure gauge to the working hydraulics test port and check the primary relief setting against the 230 bar spec on page 61; low readings point to pump wear or a bad relief valve. Time the lift cylinder stroke, it should run about 6.3 seconds at full engine speed per page 338.
Manual Section: Hydraulic System (Working Hydraulics & Cooling) p. 61Transmission slips or hesitates to shift gears under load, especially when climbing grades
Check transmission fluid level and condition, drain and refill with the correct grade if contaminated. Replace the transmission filter and torque the housing bolts per the specification chart on page 50. If slipping persists, pressure test the hydrostatic drive circuit and inspect clutch pack wear following the Travel Drive procedures starting on page 71.
Manual Section: Travel Drive p. 50Engine won't crank or control panel behaves erratically in damp or cold weather
Start at the battery terminals, marked B+ and B- on the wiring diagram on page 391; clean off corrosion and torque the connections tight, loose terminals are the most common cause of intermittent faults. Follow the systematic fault-finding procedure to isolate whether it's wiring, the alternator, or a sensor relay.
Manual Section: Electrical System p. 391Steering feels jerky with delayed, inconsistent response during turns at low RPM
Bleed air from the steering circuit lines first, trapped air causes exactly this kind of jerky, delayed response. Inspect steering hoses for stretch beyond the -4% to +2% tolerance noted on page 487 and replace any hose outside that range. Verify the priority valve and steering cylinder function against the specs in the Steering section starting on page 281.
Manual Section: Steering p. 487Frequently Asked Questions
What are the torque specs for engine mounting bolts on New Holland LW80?
The tightening torque for the engine bracket bolts (M 12 / 8.8 / SW 19) on the New Holland LW80 is 79 Nm (58 lbft). p. 67
What are the replacement specifications for Hydraulic pump seal kit?
The manual identifies 'Seal kit for drive shaft' and 'External seal kit' for the A4VG hydraulic pump. These kits are for replacement, but specific material or dimensional specifications are not provided. p. 103
What is the engine oil capacity and recommended oil type for the New Holland LW80?
The engine oil capacity, including the filter, is 9.0 liters (2.4 gallons). The recommended oil type is CD SE 15W-40. p. 66
What are the valve clearances for the inlet and exhaust valves on the New Holland LW80 engine when cold?
The valve clearance for the inlet is 0.20 mm (0.008 inch) and for the exhaust is 0.45 mm (0.018 inch) when the engine is cold. p. 59
How quickly can I access this New Holland Construction LW 80 manual after?
Immediate download of the complete 541-page searchable Technical Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Am I able to print pages from this New Holland Construction LW 80 manual?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Can I find wiring schematics in this New Holland Construction LW 80 manual?
Yes, this New Holland Construction LW 80 Technical Manual includes a wiring diagram for the electrical system.
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