2015 New Holland L565, LX565, LX665 Skid Steer Loader Service Manual

New Holland service manual for the 2015 L565, LX565, and LX665 skid steer loaders, covering the naturally aspirated N844 and turbocharged N844T diesel engines.

• Engine repair: Engine removal and installation, cylinder-head and crankshaft inspection, piston and bearing work, valve adjustment, and LX665 turbocharger overhaul.

• Fuel and cooling systems: Injection-pump spill timing, injector nozzle service, fuel-system testing, thermostat inspection, and water-pump and radiator replacement.

• Hydrostatic drive and steering: Pump and motor testing and overhaul, motor shimming, neutralizer adjustment, and startup procedures after component replacement.

• Hydraulic repairs: Gear-pump and control-valve overhaul, boom and bucket cylinder rebuilding, auxiliary attachment compatibility, and high-flow troubleshooting.

• Final drive and structure: Axle and gearbox repairs, chain and sprocket service, parking-brake adjustment, and ROPS, boom, and attachment mounting plate service.

• Electrical diagnosis: Early and later EIC diagnostics, interlock testing, alternator and starter repair, wiring diagrams, and circuit-specific test tables.

Suited to mechanics familiar with diesel and hydrostatic systems who have access to lifting equipment, pressure gauges, and hydraulic flow-test equipment.

N844/N844T Engine and Fuel System Repair

If you are rebuilding the N844 or N844T diesel, the engine chapters detail dismantling, inspection, and reassembly. Reference data includes crankshaft clearances, piston-ring limits, general hardware torque charts, and cylinder-head and connecting-rod torque specifications.

Early and later lubrication specifications distinguish oil-capacity and dipstick changes by model and serial number.

Fuel coverage includes injector nozzle service and the fuel injection pump spill-timing procedure. Internal injection-pump repair and testing/setting are assigned to fuel-equipment specialists.

LX665 turbocharger procedures include bearing-clearance checks, dismantling, and reassembly. Cooling-system coverage separates the two engines’ thermostat checks and includes water-pump and radiator service.

The special-tool list identifies the FNH 00120 compression-test adapter and FNH 02020 diesel compression test kit.

Hydrostatic Testing and Hydraulic Component Variants

Charge-pressure, case-drain, and efficiency tests help distinguish charging-circuit problems from pump or motor wear when diagnosing weak drive. Hydrostatic System Oil Flow diagrams accompany the repair sections, including motor shimming and startup checks after replacement.

Hydraulic repairs distinguish 25000- and 26000-series gear pumps, control valves with bolt-on solenoid blocks or threaded solenoid ports, and both boom-cylinder designs. The general section also covers hydraulic tube and fitting installation.

High-flow coverage adds selector-valve and pump-drive service, attachment case-drain requirements, and a High Flow Hydraulic Oil Flow Diagram.

The main relief cartridge is nonadjustable and nonserviceable; the manual warns that a higher-pressure replacement can damage the boom or main frame. Motor-removal cautions also explain why hammering the shaft out of its coupler can damage the motor.

EIC Diagnostics and Electrical Diagrams

Separate silver-frame and gold-frame Electronic Instrument Cluster (EIC) chapters explain their respective diagnostic and configuration functions. Gold-frame coverage includes stored fault history, setup modes, and engine-speed display calibration.

The Starting System Electrical Diagram, Fuel System Electrical Diagram, and Warning Light (Four-way) Wiring Diagram accompany sensor and interlock tests, relay wiring, and engine fuse-block layouts. Alternator and starter sections include internal inspection and bench testing.

Final Drive, Cab, and Attachment Service

Final-drive procedures cover drive-axle seals and bearings, gearbox overhaul, and parking-brake caliper adjustment. Structural service includes cab-tilting procedures, the ROPS frame, boom-lock linkage, upper and lower boom links, and round-bar and square-bar attachment mounting plates.

Cab heater/defroster work includes core and fan replacement plus LX665 bleeding instructions. The Bucket and Tire Combination Chart links tire configurations with suitable bucket widths.

Follow the manual’s precautions for raised booms, cab tilting, heavy lifting, and pressurized hydraulics before tear-down.

A Preview of Valve and Thermostat Specifications

These examples are a small selection from the engine adjustment and cooling-system data.

For both engines, intake and exhaust valve clearance is specified at 0.2 mm (0.0078 in.) with the engine cold.

The thermostat inspection table gives start-to-open temperatures of 176–183°F (80–84°C) for the N844 and 156–163°F (69–73°C) for the N844T. Separate fully open temperatures and valve-lift specifications are also provided.

PDF Search, Navigation, and Page Count

Text search and wiring detail: The main text is searchable, while some wiring diagrams have no searchable labels. Embedded bookmarks cover all eight sections and major topics. Small labels on the detailed wiring sheets require zooming.

One printable, English-language PDF contains 827 pages across eight sections. Section contents, indexes, three wiring sheets without a text layer, one numbered blank page, and one wiring-diagram divider page are already included in that total.