Comprehensive Service Manual for New Holland LS120 LS125 Skid Steer – 562 P. Manual | Factory Grade

New Holland LS120 & LS125 Service Manual

This professional-grade workshop documentation provides the definitive technical foundation for maintaining, diagnosing, and overhauling New Holland skid steer loaders. By utilizing factory-direct specifications, technicians ensure mechanical uptime and operational safety through precise engineering standards. This manual eliminates the risks associated with aftermarket guesswork, securing the longevity of your equipment investment through verified OEM procedures.

Operational ROI & Field Efficiency

• Cost Mitigation: Prevent expensive component failures by adhering to strict factory clearance and wear tolerances.
• Precision Maintenance: Reduce machine downtime with streamlined removal and installation sequences designed by New Holland engineers.
• Accuracy: Eliminate trial-and-error troubleshooting with targeted hydraulic and electrical diagnostic logic.
• Safety Compliance: Ensure all ROPS and safety interlock systems are serviced to original manufacturing specifications.

Technical Logistics & Document Profile

• Total Pages: 562
• File Format: PDF (High-Resolution / Searchable)
• Print/LIT Number: 86584315
• Publication Date: November 2000

Model Scope & Series Coverage

This documentation covers the LS120 and LS125 skid steer loader platforms. It includes detailed data for both the Onan P218 (Gas) and New Holland E673 (Diesel) engine configurations. Coverage extends across global serial number ranges, including specific sections for regional lighting and safety decal requirements.

Visual Schematics & Workshop Clarity

The manual features high-resolution fold-out style wiring diagrams and hydraulic flow charts engineered for clarity at high zoom levels. Every schematic includes color-coded identification and connector pin-outs, allowing technicians to trace circuits across the chassis without ambiguity. Detailed exploded views of the final drive and hydrostatic pumps provide a 1:1 visual reference for complex component reassembly.

Master Service Index

• General Information: Hardware torque specs, lubricants, and machine serial locations.
• Engine Systems: Overhaul procedures for Onan and New Holland power plants.
• Fuel Systems: Troubleshooting for gas and diesel delivery circuits.
• Electrical System: Battery, alternator, and starter motor diagnostics.
• Hydrostatic Transmission: Variable displacement pump and motor service.
• Hydraulic System: Main control valves, cylinders, and cooling circuits.
• Chassis & Drive: Final drive chains, axles, and tire specifications.
• Platforms & Decals: ROPS, seat, and safety labeling.

Factory Precision Data

Advanced Diagnostics & Logic

Troubleshooting sections are organized by symptom-based logic, guiding the user from the most common failure points to complex internal malfunctions. This includes dedicated flowcharts for the hydraulic interlock system, ensuring the electronic seat and belt sensors correctly communicate with the boom lock solenoids to prevent unauthorized or unsafe movement.

FAQ

What are the main hydraulic system pressure limits for the LS120 and LS125?

The main relief valve for the hydraulic system is factory-calibrated to operate between 1600 and 1700 PSI (110–117 bar). Maintaining this specific pressure benchmark is vital for ensuring the lift arms reach their rated SAE operating capacity of 600 lbs for the LS120 and 700 lbs for the LS125. If pressures fall below this range, hydraulic cycle times will lag, potentially indicating a need to inspect the gear-type pump which delivers 8 GPM at 3600 RPM.

How do I troubleshoot the engine if the starter will not engage?

The service manual details a complex safety interlock logic that requires the seat sensor and seat belt switch to be closed before the 12-volt starter circuit completes. You must verify that the battery is providing a minimum of 390 Cold Cranking Amps (CCA). If the engine still fails to turn over, the diagnostic section guides you through testing the neutral start switch on the hydrostatic pumps to ensure the transmission is not engaged, preventing accidental machine movement during startup.

Is this manual compatible with both the Gas and Diesel engine variants?

Yes, this documentation provides full coverage for the Onan P218 two-cylinder gasoline engine found in the LS120 and the New Holland E673 three-cylinder diesel engine used in the LS125. It includes specific mechanical benchmarks for both, such as the 3.2 US quart (3.0 liter) oil capacity for the diesel variant versus the 1.8 US quart (1.7 liter) capacity for the gas model, ensuring correct fluid management during a full overhaul.

Where can I find the specific torque requirements for the wheel lug nuts?

High-stress hardware specifications are located in the General Information section, which lists the standard torque for 1/2-inch wheel bolts as 105–115 lb-ft (142–156 N·m). Adhering to these exact torque values is critical for preventing wheel stud fatigue and ensuring the final drive axles, which are housed in a 9.0 US gallon (34.1 liter) common oil reservoir, remain securely seated during heavy-duty skid-steering maneuvers.

What are the benefits of using these high-resolution schematics in the workshop?

The digital schematics are engineered for high-level zoom, allowing technicians to trace the 20-amp charging circuit and complex hydraulic flow paths without losing image fidelity. This is especially useful when diagnosing the hydrostatic transmission’s charge pressure, which must be maintained at 80–120 PSI. Having instant access to these clear visual guides on a tablet or laptop helps identify the exact port locations on the variable displacement piston pumps while standing at the machine.

How do I service the drive chain system on these models?

The manual outlines the procedure for accessing the final drive chains located within the chassis side tanks. It specifies that the drive system and hydrostatic reservoir share a combined capacity of 9.0 US gallons (34.1 liters) of specialized hydraulic/transmission oil. Technicians must check the chain tension through the inspection covers to ensure there is no excessive slack, which could lead to sprocket wear or drive-line binding under load.