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Part of the New Holland Repair Manuals.
All 826 pages of this New Holland LW50B, LW80B Service Manual PDF (OEM #60367191NA) focus on one machine family: the LW50B and LW80B wheel loaders, from the hydrostatic travel drive to the articulated frame joint. Inside you get factory wiring diagrams with a complete fuse list, hydraulic schematics for the working circuit and steering priority valve, and exploded views of every Carraro axle group: brake disks, epicyclic reduction gears, wheel hubs, differentials. Step-by-step adjusting operations walk you through the axial-piston pump and motor on the hydrostatic transmission. Torque the wheel nuts to 500 Nm, hold the front axle mounting bolts at 350 Nm, and set the parking brake idle position at 6.0 mm. No more chasing hydraulic faults with a gauge and a hunch. Bookmarked PDF opens on any device; grab your tablet, walk to the loader, and start wrenching.
What's Inside This New Holland LW50B, LW80B Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 4-17 | Safety Instructions, Organizational Measures, Personnel Qualification, Special Dangers |
| Service Data | 18-47 | Engine, Axles, Hydraulic System, Pump, Motor, Tightening Torques |
| Diesel Engine | 48-51 | - |
| Travel Drive | 52-259 | Hydrostatic Transmission, Axial-Piston Pump, Axial-Piston Motor, Distributor, Adjusting Operations |
| General Information and Safety | 260-273 | Axle Design, Safety Instructions, Maintenance, General Working Instructions |
| Carraro 28.16 Fr Front Axle | 274-324 | Carraro Repair Manual P/N CA357327, Rif. CA147195 (1st Edition 03/2004), Sectional View, Brake Disk Group, Epicyclic Reduction Gear Group, Wheel Hub Group, Differential Support Group, Pinion Group |
| Carraro 28.25-28.25 Fr Front Axle | 372-481 | Carraro Repair Manual P/N CA357329, Rif. CA150144-CA147188 (1st Edition 03/2004), Sectional View, Brake Disk Group, Epicyclic Reduction Gear Group, Wheel Hub Group, Differential Support Group, Pinion Group |
| Carraro 28.16 + TB150 Rear Axle | 482-577 | Carraro Repair Manual P/N CA357330, Rif. CA147194-CA150145 (1st Edition 04/2004), Sectional View, Hydraulic Motor Group, Transmission Box Group, Epicyclic Reduction Gear Group, Wheel Hub Group, Differential Support Group |
| Carraro 28.20 + TB150 / TB138.5 Rear Axle | 578-713 | Carraro Repair Manual P/N CA357331, Rif. CA147186-CA147187-CA147189-CA150146-CA150147 (1st Edition 05/2004), Sectional View, Hydraulic Motor Group, Transmission Box Group, Epicyclic Reduction Gear Group, Wheel Hub Group, Differential Support Group |
| Steering System | 714-735 | Hydraulic Steering System, Steering Valve, Steering Cylinder, Priority Valve, Double Pump |
| Brake System | 736-761 | Service Brake, Parking Brake, Pedal Brake Valve, Pressure Switch, Accumulator Charging Valve, Pressure Accumulator |
| Hydraulic System | 762-797 | Working Hydraulics, Control Block, Lifting Cylinder, Dumping Cylinder, Hydraulic Reservoir, Hydraulic Filter |
| Electrical System | 798-817 | Electrical Components, Wiring Diagrams, Fuse List, Pcb |
| Frame | 818-826 | Articulated Joint, Pin, Articulated Bearing, Clamping Elements, Frame Halves |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| LW50B | ||
| Wheel-nut tightening torque | 500 Nm | p. 29 |
| Cardan shaft tightening torque | 34 Nm | p. 29 |
| Engine rating speed | 2300 min-1 | p. 22 |
| All Models | ||
| Parking brake idle position | 6.0 mm | p. 746 |
| Parking brake switching threshold | 5.5 mm | p. 746 |
| Precharging valve pressure | 0.5 bar | p. 782 |
| By-pass valve pressure | 2.5 bar | p. 782 |
| Fan speed | 2750 min-1 | p. 786 |
| F11 fuse rating | 7.5A | p. 802 |
| F30 fuse rating | 10A | p. 802 |
| LW80B | ||
| Wheel-nut tightening torque | 500 Nm | p. 44 |
| Engine rating speed | 2300 min-1 | p. 36 |
New Holland LW50B, LW80B Common Problems This Manual Covers
New Holland LW50B wheel loader creeps in neutral and loses drive power under load
Check the mechanical zero position and feed pressure following the hydrostatic troubleshooting sequence in the transmission section. Test travel high pressure with gauges on both sides of the closed loop. If you pull the variable displacement pump for repair, torque its mounting screws to 250 Nm before reconnecting the high pressure lines.
Manual Section: Travel Drive p. 274Bucket lifts slowly and boom drifts down once hydraulic oil gets hot
Drain a sample from the reservoir and inspect the return filter element first. Verify the by-pass valve on page 782 opens at 2.5 bar; a plugged element pushes unfiltered oil past it and starves the feed circuit. Confirm the precharging valve holds 0.5 bar, then replace the element and refill.
Manual Section: Hydraulic System p. 782Brake pedal knocks back underfoot and parking brake will not hold on a slope
Test accumulator recharging and feed pump pressure using the brake troubleshooting table on page 756. Measure parking brake idle travel; anything past 6.0 mm means the linkage needs adjustment. Verify the switching threshold sits at 5.5 mm so the warning circuit trips before braking action fades. Bleed the pedal brake valve afterward.
Manual Section: Brake System p. 756Engine shuts off while working and will not restart, starter cranks fine
Check fuse F11 first; it feeds the engine stop solenoid and carries a 7.5A rating listed on page 816. Replace it only with an original fuse of the same value. If it blows again, inspect the solenoid harness for chafe against the block and test the stop solenoid connector for corrosion.
Manual Section: Electrical System p. 816Hydraulic oil overheats during continuous loading, cooling fan turns slower than normal
Measure fan speed at full throttle; the spec on page 786 calls for at least 2750 min-1 at maximum diesel speed. Clean the cooler core with compressed air from the fan side. If speed still falls short, test the fan drive circuit for leakage and inspect the hydraulic motor for wear.
Manual Section: Hydraulic System p. 786Frequently Asked Questions
What is the torque specification for the wheel nuts on a New Holland LW50B?
The tightening torque for the wheel nuts on the LW50B is 500 Nm. This applies to the A 20-8 thread size (M 20 x 1,5 / SW 27). p. 30
What is the approximate filling quantity for the diesel engine oil on the LW50B?
The approximate filling quantity for the diesel engine oil, including filters, is 10.5 liters. p. 29
What is the recommended oil change interval for the diesel engine on the LW80B?
The recommended oil change interval for the diesel engine on the LW80B is every 500 operating hours. p. 43
What is the primary pressure relief setting for the hydraulic system on the LW50B?
The primary pressure relief setting for the working hydraulics on the LW50B is 230 ±10 bars. p. 24
How will I receive this New Holland LW50B Service Manual?
All 826 pages arrive as one scanned PDF at checkout. Read it at the desk, then take the phone out to the machine.
Can I print this New Holland LW50B manual?
No restrictions at all. Print individual pages, full chapters, or the entire manual. The PDF is completely unlocked.
Is there a hydraulic diagram in this New Holland LW50B Service Manual?
Yes, complete hydraulic schematics with flow diagrams, valve configurations, and pressure specifications are included. You can see one on page 55.
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