The LM Trac 287 is a multi-purpose compact tractor designed and manufactured by Oy LAIMU Ab. It is built with high-quality materials and components from reputable manufacturers, adhering to strict quality standards and control criteria throughout its design and manufacturing process.

Function Description

The LM Trac 287 features a fully hydraulic drive power train, enabling highly flexible forward and backward movement. Its driving automation system allows for efficient operation. The double-action drive pedal controls both driving direction and speed, similar to a traditional clutch/brake pedal. Pressing the upper part of the pedal moves the machine forward, while pressing the lower part with the heel moves it backward. Releasing pressure on the pedal activates an automatic hydrostatic braking action, which functions regardless of the driving direction. A separate brake pedal is primarily used for holding the machine on sloping surfaces.

The machine is equipped with a variable displacement axial piston pump driven by a Perkins 403J-E17T diesel engine. This pump supplies oil to two-speed hub motors located in the front wheel hubs, allowing for stepless adjustment of driving speed. An electro-hydraulic valve system provides a function similar to a traditional differential lock, equalizing oil flow to the hub motors and ensuring equal tractive capacity to all drive wheels.

Work hydraulics are supplied by a fixed-displacement gear pump, powering all actuators hydraulically. The steering mechanism utilizes hydrostatically boosted rear-wheel steering with a separate steering hydraulics pump, orbitrol steering gear, and steering cylinder. This system allows for steering even when the machine is off, though it will be stiffer.

Plate compressor brakes, submerged in oil and integrated with the hub motors, serve as both driving and parking brakes. The automatic braking function of the hydraulic drive power train also acts as a service brake.

Important Technical Specifications

Dimensions:

Length: 2730 mm
Width: 1300 mm
Height: 2110 mm
Wheelbase: 1570 mm
Track width, front: 1000 mm
Track width, rear: 1030 mm
Turn radius, inner: 1750 mm
Turn radius, outer: 3050 mm

Weights:

Kerb weight: 1550 kg
Front axle weight: 900 kg
Rear axle weight: 650 kg
Largest permitted weight for front axle: 1750 kg
Largest permitted weight for rear axle: 1350 kg
Largest permitted total weight: 2000 kg

Engine:

Perkins 403J-E17T, 3-cylinder 4-stroke diesel
Liquid cooling, direct injection, turbocharger with waste-gate valve
Cylinder bore: 84 mm
Stroke: 100 mm
Number of cylinders: 3
Displacement: 1663 cm³
Nominal output: 36 kW (2400 r/min)
Maximum torque: 166.5 Nm (1400 r/min)
Min. idle: 1000 r/min
Meets smoke regulation: US EPA 40 CFR Part 1039.105
Meets emissions regulations: EU NRM 97/68/EC Stage 5, US EPA 40 CRF Part 1039 Tier 4 Final, CARB 13CCR Section 2423 Tier 4 Final, MLIT Japan Stage 4

Fuel System:

Fuel: Diesel, EN 590 (E.U.) – ASTM D975-09B regulation - S 15 (U.S.)
Fuel tank capacity: 35 l

Cooling System:

Thermostat-controlled, pressurized
Cooling system volume: Approximately 10 l

Drive Hydraulics:

Automatic four-wheel drive with traction control
Two speed ranges: Slow (0–10 km/h) and Fast (0–20 km/h)
Hub motors: Two-speed radial-piston type

Work Hydraulics:

Variable-supply open system
Work hydraulics pump: Axial piston variable pump
Valves: 4-stem, electrically controlled
Motor hydraulics: 47 l/min (2400 rpm), 200 bar
Cylinder hydraulics: 15 l/min, 175 bar

Steering Hydraulics:

Hydrostatically boosted body steering with load sensing
Steering valve: Danfoss

Brakes:

Automatic hydraulic drive power train braking
Drum brakes integrated in front wheel hub motors
Parking brake: Spring-load disc brakes (negative brakes) submerged in oil

Axles:

Front wheels mounted on hub motors
Rear wheels mounted to rigid rear axle
Optional four-wheel drive available

Tires:

Standard front: 31x11.50 R15 (2 bar pressure)
Standard rear: 175/70 R13 (3 bar pressure)

Electrical System:

Voltage: 12 V
Alternating current alternator: 12 V / 85 A
Battery: 12 V, Earth: Negative (-)
Bulbs (Headlight, Working light, Parking light, Turn indicator, Brake light, Beacon): LED
Interior light, rotatable spot light: 10 W
Interior light, rigid: 21 W

Air Conditioning:

Refrigerant charge (R134a): 0.9 kg

Volumes:

Hydraulic tank: 42 l
Engine oil: 6 l
Windscreen washer tank: 3.8 l

Usage Features

The LM Trac 287 is designed for ease of use and operator comfort. The cabin features a multi-function switch for horn, turn signals, windscreen washer, and wiper. The screen provides essential information such as fuel gauge, tachometer, speedometer, engine temperature, operating time, and various warning indicators. Screen buttons allow for speed range selection, 4WD activation (optional), differential lock, rear camera view (optional), tool view, and settings.

The right armrest includes joysticks for controlling hydraulics, a hand throttle, and switches for various functions like mirror heating (optional) and front tool suspension (ON/OFF). The upper panel houses switches for the parking brake, parking/headlights, hazard flasher, air conditioning, and cabin fan. The driver's seat is adjustable for distance, suspension stiffness, backrest tilt, and lumbar support. The steering column can be adjusted for tilt and height.

The machine can be equipped with an A-frame, rotating A-frame, or three-point attachment device for front tools. Rear tool attachment and power take-out are available as optional accessories. A trailer hitch (optional) with a 50 mm ball diameter allows for towing. The engine bonnet/platform body is hinged and can be tilted, with a hydraulic tilting system available as an accessory.

Maintenance Features

The LM Trac 287 has a component structure that facilitates quick and easy maintenance and repairs. Service hatches on both sides of the engine compartment provide access to key components like the hydraulic oil filler neck, engine oil dipstick, fuel filters, air conditioning compressor, alternator, thermostat, and turbocharger. The radiator and condenser core can be accessed by removing the rear grille and tilting the air conditioning condenser.

A comprehensive periodic maintenance schedule is provided, with intervals ranging from daily (10 hours) to 3000 operating hours. This schedule includes checks for indicators and warning lights, engine oil level, coolant level, hydraulic oil level, washer fluid level, tire inflation pressure, air cleaner service indicator, engine air filter, fuel filters, engine compartment inspection, greasing, belt tension, battery, wheel fastener torque, radiator and condenser cleaning, cabin fresh-air filter, oil/fluid leak checks, parking brake function, engine air filter replacement, engine oil change and oil filter replacement, primary and secondary fuel filter element replacement, hydraulic oil return filter replacement, intake air, coolant and fuel hoses check, fan clearance check, air conditioning maintenance, hydraulic oil change and tank cleaning, fuel tank cleaning, pressure measurement and adjustment of drive/work hydraulics, alternator/fan belt replacement, engine valve lash check, turbocharger inspection, crankcase breather filter element replacement, alternator check, starter check, cooling system cleaning, engine mounts inspection, handbrake valve coil replacement, thermostat replacement, and water pump inspection.

The manual emphasizes safety precautions, such as never opening the radiator cap when the engine is hot, not performing maintenance on a pressurized cooling system, and never towing the machine. It also provides guidance on environmental considerations, including proper disposal of hazardous waste.

LM Trac 287 - Cabin from Inside

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