1985–1990 New Holland L225, L325, L425, L445 & L445D Skid Steer Loader Service & Repair Manual

This New Holland service and repair manual covers 1985–1990 L225, L325, L425, and L445 skid steer loaders, including the L-445D Deutz diesel variant.

Text search, bookmarks, and diagram detail: Text search is available on some pages; many repair sections have no searchable text. Chapter bookmarks are included, but MAIN MENU links to a separate file. Small electrical labels are readable when enlarged. Several hydraulic diagrams need rotating and have faint lines or clipped edge text.

• Hydrostatic transmission: Cessna 70112/70142 pump overhaul, 74410 motor inspection and rebuilding, gerotor charge-pump service, and start-up checks after overhaul.

• Lift hydraulics: Cessna 24300 gear-pump inspection and reassembly, control-valve service, and boom and bucket cylinder seal replacement.

• Steering and engine drive: Neutralizer repair, control-linkage adjustment, and removal and installation of early chain couplers or later drive shafts.

• Final drive and brakes: Chain-case teardown, axle bearing and seal replacement, chain tensioning, and parking-brake phasing.

• Electrical diagnosis: Motorola RA and TE alternator tests, charging-circuit wiring diagrams, and Style I/II seat-activated boom-lockout checks.

• Reference material: Model-specific hydraulic diagrams, troubleshooting charts, component section views, exploded views, and torque tables.

The pressure and flow tests make this manual suited to mechanics experienced with hydrostatic systems and equipped with hydraulic test instruments.

Hydrostatic Drive Repair and Fault Isolation

The transmission troubleshooting section compares pump and motor efficiency using flow measurements and pressure gauges. It requires satisfactory pump efficiency before motor testing, helping avoid misdiagnosing a motor when the supply pump is worn.

Start-up coverage addresses priming, air bleeding, and follow-up filter checks after overhaul.

Earlier motor rotating groups use powdered-metal shoes with a Tufftrided thrust race; later units use bronze shoes with a carburized race. Mixing parts between these assemblies can cause premature wear. Conversion kit 273357 is identified for replacing the earlier group.

Lift Hydraulics, Steering, and Final Drive

The L-225, L-325, and L-425 use single-acting boom cylinders; the L-445 uses double-acting cylinders and different boom-valve porting. Cylinder sections cover seals, wipers, and Teflon piston rings where used.

Steering coverage connects neutralizer and stop-bolt adjustment with creeping complaints. Final drive repair coverage adds axle seal replacement, bearing shimming, brake-disc clearance, and both engine-stopped and engine-running chain-tensioning methods.

Incorrectly aligned eccentric bearing caps can accelerate bearing, chain, and sprocket wear. Always ensure hydraulic pressure is relieved and the boom is properly supported before service.

Engine Variants and Drive Connections

Early chain couplers and later drive shafts have separate inspection and installation procedures. The conversion table identifies model-specific shafts and the Wisconsin crankshaft changes required when updating older coupler-driven machines.

Engine reference data covers Wisconsin TJD and VH4D, Kohler K582S, and Deutz engines. For L-445 diesel loaders, mount and installation procedures distinguish the F2L-411D before S/N 528284 from the F2L-511D at S/N 528284 and above. Internal engine overhaul is outside this manual's scope.

Charging Circuits, Boom Lockout, and Reference Drawings

Motorola RA and TE sections cover isolation-diode checks, field-circuit tests, and regulator diagnosis. TE Type I uses a three-wire regulator without an isolation diode and requires an ammeter; Type II supports the charge-warning light.

Style I and II seat-activated boom-lockout coverage includes the seat switch, solenoid, time delay, and switch-clearance adjustment. The later switch conversion is identified as kit 676699.

Reference drawings include the L-225 and L-445 Loader Hydraulic Diagrams, the RA Series Motorola Indicator Light circuit, the TE alternator wiring diagram, and the boom-cylinder section view. Hydraulic-fitting, component, and hardware torque charts supplement these drawings.

Pump Wear, Coupler Gap, and Alternator Test Examples

These examples represent a small selection of the manual's inspection and test data.

The gear-pump inspection section calls for back-plate replacement when face wear exceeds 0.0015 in. For chain-coupler alignment, the sprocket faces allow a maximum 0.015 in. gap at the tooth area.

For the Motorola RA field-circuit check, the auxiliary-terminal reference is approximately 1.5 volts with the ignition on and engine stopped.

Printable PDF and Included Pages

One printable English PDF with 118 pages total: 116 pages of manual content, one additional opening page, and one cover page. Both opening pages are already included in the total.