1999 New Holland LM 410 / LM 630 / LM 640 & 8060 Engine Service Manual

• Machine and engine coverage: New Holland LM 410/LM 410 T, LM 420, LM 430, LM 630, and LM 640 telehandlers, with naturally aspirated and turbocharged 8045 engine builds.
• Engine and fuel repair: Covers engine/transmission assembly removal, engine teardown and reassembly, cylinder-head and valvetrain work, piston/rod/crankshaft inspection, timing-gear synchronization, Bosch injection-pump timing, fuel-system bleeding, injector service, oil-pump overhaul, turbocharger service, and cooling-system work.
• Transmission diagnosis and overhaul: Details the T4-2024 Powershuttle/4x4 Compact Shuttle and T12000 4x3 Powershift units, including pressure and stall testing, Powershift microprocessor test modes, clutch-pack and gear-train service, end-float shimming, torque-converter circuits, and transmission removal.
• Axle, brake, and steering work: Provides Hurth front- and rear-axle removal and overhaul, pinion and differential-bearing setup, wet-disc brake fault charts, bleeding and pressure testing, parking-brake service, axle load-sensor adjustment, and hydrostatic steering circuit service.
• Hydraulic and loader-boom procedures: Documents flow and pressure testing, relief-valve adjustment, pump/control-valve/accumulator/counterbalance-valve overhaul, mechanical and servo controls, boom wear pads and shims, hydraulic cylinders, telescopic boom removal, and complete loader-boom removal.
• Electrical, cab, and climate systems: Supplies separate Powershift and Powershuttle wiring sets, starter/alternator/battery testing, cab removal and bonded-glass repair, heater diagnosis, plus R134a air-conditioning leak testing, recovery/charging, flushing, component repair, and compressor overhaul.
• Factory reference data and tooling: Lists component torques, approved fluids and capacities, test pressures, wear limits, clearances, adjustments, electrical values, fastener charts, and tools such as NH01251, FNH02760, NH01379, NH01382, and NH01380.

The 623-page PDF contains 622 New Holland repair-manual pages divided into seven machine-system sections. It is not an engine-only booklet; coverage runs from the power unit and driveline through brakes, steering, cab, climate control, hydraulics, and the boom. New Holland directs the described work to authorized workshops and specifies special lifting, pressure-test, electrical-test, and refrigerant equipment. The material is therefore suited to experienced service technicians with a properly equipped shop, not first-time DIY repair.

Confirm the 8045 Engine and Transmission Match

The engine application table assigns the naturally aspirated 75 hp 8045.05B.476 to the LM 410, LM 630, and LM 640; the turbocharged 106 hp 8045.25.476 to the LM 410 and LM 430; and the turbocharged 106 hp 8045.25.475 to the LM 420 and LM 430. The model matrix also distinguishes Powershuttle and Powershift transmissions, mechanical and servo loader controls, and standard, heavy, and heavy-plus counterweight configurations. Because both transmission families are covered, the transmission identification plate—not the machine model alone—should determine which chapter, parts, and test procedure applies. 8060 is not a covered telehandler model in this manual.

Full-Machine Repair Scope

Engine specifications and overhaul tables cover the cylinder block and dry liners, cylinder head, valve guides and seats, camshaft and tappets, pistons, connecting rods, crankshaft and main bearings, flywheel, timing gears, oil pumps, and coolant pump. Transmission material traces neutral, forward, and reverse oil and power flow before moving into solenoid diagnosis, pressure checks, shaft and clutch work, and shimming. The axle chapters identify the Hurth 60221256 front axle and Hurth 60221299 rear axle, with hub, transfer-box, differential, crown-wheel, and pinion procedures.

Hydraulic coverage is organized around the gear pump with integral load-sensing flow divider, priority steering/brake circuit, pressure-reducing valve and accumulator, open-center sectional control valve, individual circuit relief valves, and counterbalance load-holding valves. The manual also identifies DIN 3902 hydraulic fittings on the LM 430 and LM 640 and provides model-specific valve and cylinder circuit views.

Wiring, Schematics, and Repair Cautions

The separate linear wiring packages divide electrical diagnosis by transmission type. Named supporting illustrations include the Fuel Circuit Schematic, Powershift Microprocessor Circuit, Brake System Schematic, Steering Valve Schematic, Hydraulic Circuit Schematic, and Air Conditioning Flow Diagram, backed by system-specific fault charts and test data.

The transmission chapter delays installation of new shaft seals until rear-cover shimming is complete because repeated cover fitting and removal can damage them. The general data also warns that mismatched tire combinations on four-wheel-drive machines can cause severe driveline damage. Procedures involving a raised boom, brake accumulator, pressurized hydraulics, heavy assemblies, or refrigerant require proper supports, pressure isolation, rated lifting equipment, and certified R134a recovery/recharge equipment.