Part of the New Holland Repair Manuals.
Stop searching the web for unreliable skid-steer loader specs. This heavy-duty 562-page New Holland LS120, LS125 repair manual PDF targets every major component, from the hydrostatic drive pump down to the final drive chain. You get complete factory wiring diagrams and full hydraulic schematics to trace complex faults without second-guessing. Open it up to find dedicated troubleshooting charts for the parking brake, detailed exploded views of the hydraulic gear pump, and an entire section packed with hardware torque specifications. Verify your engine runs right by setting the spark plug gap to exactly 0.64 mm and torquing them down to 31-41 N-m. Blind repairs will drain your shop's profit margin. Grab this bookmarked digital download, open it on your tablet right next to the machine, and get back to making money.
What's Inside This New Holland LS120, LS125 Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 1-28 | Introduction, Company Policy, Parts and Accessories, Model Codes, Precautionary Statements, Safety Precautions, Hardware Torque Specifications |
| Engine | 29-212 | Onan Gasoline Engine Information, Diesel Engine Information, Engine Specifications, Assembly Torques, Troubleshooting, Engine Removal, Cylinder Head Assembly, Crankshaft Inspection |
| Hydrostatic Transmission | 213-272 | Hydrostatic Drive System Overview, Specifications, Troubleshooting, Hydrostatic Pump Disassembly, Hydrostatic Motor Disassembly, Transmission Neutralizing Adjustment |
| Brakes and Controls | 273-280 | Parking Brake Troubleshooting, Parking Brake Testing, Parking Brake Adjustment |
| Hydraulic System | 281-330 | Hydraulic System Compatibility, Specifications, Troubleshooting, Control Valve Disassembly, Hydraulic Gear Pump Disassembly, Boom Lockout Solenoid |
| Frames | 331-336 | Cab / ROPS Inspection, Cab / ROPS Removal, Cab / ROPS Re-Installation, Labor Guide |
| Axles and Wheels | 337-366 | Final Drive and Drive Chain, Specifications, Troubleshooting, Axles Removal, Drive Chain Replacement, Drive Chain Adjustment |
| Electrical System | 367-537 | Definition of Terms, Wiring Diagrams, Troubleshooting, Control Module Restraint System Operation, Battery Specifications, Alternator Output Test, Starter Disassembly |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Spark plug type | Champion RS 12YC AC R42CLT3 | p. 22 |
| Spark plug gap | 0.64 mm (0.025") | p. 22 |
| Oil grade | 10W-30 API Service SH/CG-4 | p. 24 |
| Oil Filter replacement cartridge | #507631 | p. 22 |
| Oil filter | 10 micron cartridge (#634958) | p. 24 |
| Oil Capacity without Filter | 1.4 L (1.5 Qt.) | p. 39 |
| Engine overheating | Dirty or inoperative blower | p. 46 |
New Holland LS120, LS125 Common Problems This Manual Covers
New Holland LS120/LS125 engine overheats during operation
A dirty or inoperative blower is the most common cause. Clean debris from the blower housing and cooling fins, and verify the blower turns freely; replace it if damaged.
Engine will not start or runs rough
Check the spark plug (Champion RS12YC / AC R42CLT3) gapped to 0.64 mm (0.025 in). On the LS120 verify the PU wire is reconnected to the ignition coil positive; on the LS125 check the fuel shutoff and stop solenoid wiring.
Low engine oil pressure or premature engine wear
Use 10W-30 API SH/CG-4 oil and the correct filter cartridge (#634958, 10 micron). Oil capacity without filter is 1.4 L (1.5 qt); confirm level and change intervals per the manual.
Hydraulic function is weak or slow
Never loosen hydraulic connections before relieving system pressure. Check hydraulic oil level and filter condition, and inspect the pump and control valves for wear as described in the hydraulic system section.
Frequently Asked Questions
How to reset the error codes on a New Holland LS120 LS125 skid steer?
The manual does not describe a specific procedure to "reset error codes" in the traditional sense. Instead, it outlines a sequence of operations (sitting in the seat, buckling the seat belt, turning the ignition key) that enables the control module restraint system. If the system is out of sequence, re-sequencing it by sitting in the seat and buckling the seat belt will allow boom operation to resume. p. 395
What are the torque specs for the engine bolts on a New Holland LS120 LS125?
For the LS120 (P218 Engine), engine mounting bolts should be torqued to 34 N⋅m (25 ft. lbs.). Cylinder head bolts (cold) require 22 - 24 N⋅m (16 - 18 ft. lbs.) with an asbestos gasket or 19 - 22 N⋅m (14 - 16 ft. lbs.) with a graphoil gasket. For the LS125 (E673 Engine), engine mounting bolts are also 34 N⋅m (25 ft. lbs.), and cylinder head bolts are 34 - 39 N⋅m (25 - 29 ft. lbs.). p. 43
How to reset the hydraulic system on a New Holland LS120 LS125?
To reset the hydraulic system after service, ensure the Service/Operate switch is in the OPERATE position and the system is clean. Install a 20.7 bar (300 PSI) pressure gauge in the hydraulic line plug port, then loosen the gear pump pressure hose 3/4 turn to bleed air. Crank the engine for 10 seconds until oil appears, then tighten the fitting. p. 263
What is the fuel tank capacity for the New Holland LS120 and LS125 skid steers?
The fuel tank capacity for both the LS120 and LS125 models is 22.7 liters (6 US gallons). This capacity is consistent across both skid steer models. p. 22
Is this New Holland LS120, LS125 Repair Manual a digital download?
A 562-page Repair Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Can I print this New Holland LS120, LS125 manual?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
Can I find wiring schematics in this New Holland LS120, LS125 manual?
Yes, this New Holland LS120, LS125 Repair Manual includes complete electrical wiring diagrams, wire routing, and connector pinouts.
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