Part of the New Holland Repair Manuals.
A directional clutch that will not hold pressure gives you nothing to work with until someone hands you the figure it is supposed to make, and that number sits in the 389 pages of this New Holland LW270 service manual, next to the oil flow diagrams that explain where the pressure went.
Publication 75131020 is written for the LW270 wheel loader with the Cummins M11C engine. It runs from safety rules, specifications and fluid capacities through the engine, torque converter and transmission, front and rear axles, braking, steering, the bucket boom and frame, the attachment hydraulic system, the electrical system and the cab.
Most jobs stall for want of one figure: a clearance, a test pressure, a tightening torque. This book carries them section by section with the disassembly and reassembly steps built around them. Download the PDF, print only the pages the job needs, and let them get dirty on the bench.
What's Inside This New Holland LW270 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety Rules | 14-20 | Generalities |
| Specifications | 21-22 | Engine, Torque Converter, Axles, Tires, Brakes, Steering System |
| Fluids and Capacity Table | 23 | Engine, Cooling System, Transmission, Hydraulic and Brake System, Fuel Tank |
| Units of Measure Used in the Manual | 24 | Force, Pressure, Torque |
| Tightening Torques | 25-27 | Torque Converter, Transmission, Nuts, Screws |
| Engine | 28-37 | Identification Data, General Specifications, Engine Supports |
| Transmission General Description and Torque Converter | 38-50 | General Description, Power Train Diagram, Torque Converter Operation, Oil Flow |
| Transmission Pump and Directional Clutches | 51-55 | Torque Converter Pump, Directional Clutches Shaft, Clutch Engagement Operation, 2nd Speed Clutch Accumulator |
| Power Train Diagrams and Control Valve | 56-72 | Forward/Reverse Power Train Diagrams, Transmission Control Valve, Solenoid Valve Operation, Manual Spool Emergency Travel |
| Automatic Transmission Control System | 73-84 | ATC Electronic Unit, Wiring Diagrams, Transmission Selector, Kick-Down Function |
| Oil Circuit and Transmission Disassembly | 85-109 | Transmission Oil Circuit, Delivery Filter, Disassembly Procedures, Parking Brake Disassembly |
| Transmission Reassembly and Maintenance Values | 110-150 | Reassembly Procedures, Standard Maintenance Values, Tightening Torques, Prop Shafts |
| Front and Rear Axles | 151-195 | Axle Description, Differential Operation, Final Drives, Axle Disassembly and Reassembly, Troubleshooting |
| Braking System | 196-221 | General Description, Operation, Diagnostics and Testing |
| Steering System | 222-245 | General Description, Steering Group, Steering Valve |
| Bucket Boom and Frame | 246-259 | General Description, Bucket, Bucket Positioner Device |
| Attachment Hydraulic System | 260-297 | General Description, Hydraulic System Pump, Equipment Control Valve |
| Electrical System | 298-353 | Logic Board and Cab Connections, Cab Instruments Cluster, Connectors |
| Cab | 354-389 | General Description, Repair, Air Conditioning Unit |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Wheel tightening torque | 78.8 daNm | p. 21 |
| Low pressure switch interruption | OFF 2,45 bar, ON 2,6 bar | p. 367 |
| High pressure switch interruption | OFF 28 bar, ON 25 bar | p. 367 |
| Steering valve main pressure setting | 206 bar (2980 psi) | p. 230 |
| Steering valve safety and anticavitation valve setting | 245 bar (3550 psi) | p. 230 |
| Thermostat range | 82 - 93°C [180° to 200°F] | p. 32 |
| Coolant pressure in cylinder block (Minimum, Thermostat closed - 1800 rpm - no load) | 1.37 bar (138 kPa) [20 psi] | p. 32 |
| Transmission-torque converter group support bracket to engine | 18 daNm | p. 43 |
| Clutch engagement oil pressure | 21 - 24 bar (299 - 342 psi) | p. 44 |
| Opening pressure of safety valve | 7.2 bar (102 psi) | p. 44 |
| Front windscreen wiper motor stroke | 45° | p. 359 |
| Rear windscreen wiper motor oscillation | 80° | p. 359 |
New Holland LW270 Common Problems This Manual Covers
Loader revs but will not climb
Directional clutches that no longer hold engagement pressure show up as an engine that winds out while the machine crawls into the pile. The Transmission General Description and Torque Converter section gives the clutch engagement oil pressure as 21 - 24 bar (299 - 342 psi), so you can gauge the circuit before anyone splits the case.
Manual Section: Transmission General Description and Torque Converter p. 44Engine temperature climbs during long cycles
Steady loading keeps the cooling system near its limit, and a tired thermostat is as likely a cause as a plugged core. The Engine section lists the thermostat range as 82 - 93°C [180° to 200°F], which lets you bench test the part instead of replacing radiators on a hunch.
Manual Section: Engine p. 32Wheel nuts working loose
Nuts that back off ream the stud holes quickly on a machine this heavy, and guessing with an impact gun is how it starts. The Specifications section gives a wheel tightening torque of 78.8 daNm to set with a torque wrench after any rim or tire work.
Manual Section: Specifications p. 21Bucket and boom settle when parked
A loaded bucket that creeps down while the operator steps away points at cylinder packing or a spool passing oil in the equipment control valve. The Attachment Hydraulic System section covers the hydraulic system pump and the equipment control valve.
Manual Section: Attachment Hydraulic System p. 260Steering goes heavy or wanders
Slow response at the articulation joint usually traces back to the steering valve, the steering group or a cylinder that has started bypassing internally. The Steering System section gives the general description, the steering group and the steering valve so you can work through the circuit in order.
Manual Section: Steering System p. 222Final drive weeps oil or whines
A hub that leaks onto the rim, or a whine that changes as the machine turns, is a differential or final drive problem rather than a transmission one. The Front and Rear Axles section carries the axle description, differential operation, disassembly and reassembly, and a troubleshooting chart.
Manual Section: Front and Rear Axles p. 151Battery flat after a shift
Repeated dead batteries on a loader that runs lights and air conditioning all day usually mean the charging circuit, not the battery. The Electrical System section specifies a 70 Amp alternator output, which gives you a figure to measure against at the terminal.
Manual Section: Electrical System p. 326Frequently Asked Questions
Which machine and engine does this manual cover?
It is the New Holland LW270 wheel loader service manual, publication number 75131020, covering the machine built with the Cummins M11C engine. Coverage runs from safety rules and specifications through engine, transmission and torque converter, axles, braking, steering, bucket boom and frame, attachment hydraulics, electrical system and cab.
Does it give torque values, or just procedures?
Both. There is a dedicated Tightening Torques section, plus values carried inside each system chapter, for example the 78.8 daNm wheel tightening torque listed in the Specifications section. Torque converter, transmission and bracket fasteners each have their own figures where the procedure calls for them. p. 21
Can I diagnose a slipping transmission with this?
Yes. The transmission chapters give the power train and oil flow diagrams, control valve and solenoid operation, and test figures such as the 21 - 24 bar (299 - 342 psi) clutch engagement pressure. Disassembly and reassembly procedures with standard maintenance values follow if the test points to internal wear. p. 44
Are wiring diagrams included for electrical faults?
Yes. The Electrical System section covers the logic board and cab connections, the instrument cluster and the connectors, and the Automatic Transmission Control System chapter includes its own wiring diagrams for the ATC electronic unit, transmission selector and kick-down function. p. 298
How will I receive this New Holland LW270 Service Manual?
All 389 pages arrive as one searchable PDF at checkout. Read it at the desk, then take the phone out to the machine.
Am I able to print pages from this New Holland LW270 manual?
You can. The PDF is unlocked and carries no copy protection, so print the sections you want and keep the file as your backup.
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