2006 New Holland LS180.B/LS185.B/LS190.B Skid Steer Loader Repair Manual (P/N 604_13_552_01)

This New Holland workshop manual covers the 2006 LS180.B, LS185.B, and LS190.B skid steer loaders. Publication 604_13_552_01 is dated March 24, 2006.

• Hydraulic systems: Primary, secondary, and high-flow circuits, including pump disassembly, relief-valve pressure and flow testing, and contamination-control procedures.

• Engine and cooling: Model-specific engine removal and installation, radiator service, fuel-system specifications, and starter-motor disassembly, inspection, and assembly.

• Hydrostatic transmission: Tandem-pump repair, single-speed and two-speed drive-motor service, travel adjustments, steering-command adjustment, and startup checks.

• Axles and brakes: Front and rear axle disassembly, drive-chain tensioning, final-drive sprocket service, and hydraulic parking-brake diagnosis.

• Electrical diagnosis: Circuit-specific test charts, connector pin assignments, wiring schematics, and EIC/AIC instrument-cluster troubleshooting.

• Lift and attachment systems: Boom removal, lift and tilt cylinder repair, control-linkage inspection, mechanical coupler repair, and hydraulic coupler electrical tests.

• Cab and climate control: ROPS tilting, seat and interlock service, heater and ventilation repairs, and A/C evacuation, charging, and compressor-clutch work.

The procedures suit experienced technicians familiar with hydraulic test equipment, electrical meters, and the lifting equipment needed for cab and boom work.

Hydraulic Testing and Hydrostatic Drive Repair

Charge-pressure testing compares neutral and loaded operation to help assess internal leakage in the closed-loop drive. The hydraulic chapters identify equipment such as the CAS-10280 flowmeter and CAS-1804 pressure-test fitting kit.

Sauer Sundstrand tandem axial piston pump coverage includes disassembly, inspection, measurement, and assembly. Separate procedures address single-speed and two-speed Rexroth drive motors, neutral centering, and servo-control adjustment. Hydraulic circuit schematics and a hydrostatic transmission external view support component identification.

The contamination guidance explains how debris trapped in the oil cooler and closed loop can damage repaired pumps or motors. Related sections describe the third-port bypass filter and filter-replacement requirements after cleaning.

Engine, Cooling, Axles, and Final Drives

Engine coverage centers on specifications and removal and installation, with separate procedures for the LS190.B. The fuel and injection-system chapter addresses diesel-fuel requirements, throttle-linkage tension, and fuel-level sender testing.

Radiator removal, coolant draining and filling, and sensor checks support cooling-system service. Starter-motor procedures extend to internal inspection, assembly, and no-load testing.

Axle sections cover bearings and seals, while final-drive procedures address chains and sprockets. The steering-clutch chapter covers control-lever removal and wear inspection; hydraulic parking-brake service links to the drive-motor brake assemblies.

Electrical Fault Isolation and Instrument Clusters

Connector views pair terminal positions with circuit IDs and destinations. Electrical Schematic Frames 01–27 cover circuits including starting, optional handle controls, and ground connections. An alternator sectional view identifies bearings, brushes, and the regulator assembly.

Electronic Instrument Cluster (EIC) and Advanced Instrument Cluster (AIC) charts address no-crank, no-start, incorrect RPM readings, and boom/bucket lockout faults. These charts help distinguish switch, wiring, and solenoid problems from instrument-cluster faults before parts are replaced.

Boom, Couplers, Cab, and Air Conditioning

Lift-cylinder sectional views and exploded mechanical assembly drawings accompany boom, control-valve, and cylinder service. Coupler coverage includes mounting-plate inspection and hydraulic latch solenoid and switch tests.

Cab sections document ROPS removal and forward tilting. Climate-control coverage includes louvers, blower assemblies, receiver-driers, and magnetic-clutch exploded views, plus compressor-clutch disassembly and assembly.

Torque tables cover SAE and metric fasteners, including grades 8.8, 10.9, and 12.9, plus 37-degree flare and O-ring hydraulic fittings.

Because heavy machinery maintenance involves inherent risks, particularly with high-pressure fluid systems, always review prescribed safety protocols before performing any shop work.

Selected Charge-Pressure and Sensor Test Data

The hydraulic chapters provide test conditions alongside expected readings. These two examples represent a small selection of the manual's technical data.

The charge-system test specifies a minimum of 2,482 kPa (24.8 bar/360 psi) at full throttle, with hydraulic oil at least 52°C (125°F).

For the hydraulic oil temperature sensor, the chart lists 4,300 ohms at 60°F and 180 ohms at 212°F, with checks at the sensor and through the instrument-cluster wiring.

Text Search, Section Bookmarks, and PDF Contents

Search and diagram detail: Main text is searchable, with embedded bookmarks for the major sections. Labels within the wiring-diagram images are not searchable; small pin and wire codes require zooming for close reading.

One printable, English-language PDF contains 838 pages: 837 manual pages plus one additional introductory page, already included in the total. Original covers, blank pages, and publication notices are included in the manual-page count.