The latest development of GHH Fahrzeuge is the Load Haul Dumper (LHD) LF-21H with a payload of 21 t. The LF-21H is the most powerful and efficient machine in the largest LHD class. The LF-21H is equipped with the newest generation of the worldwide proven hydrostatic drivetrain Efficient Drive System (EDS). The EDS is optimized for the rough conditions of underground mining and achieves both significant efficiency as well as productivity gains compared to conventional hydrodynamic drivetrains. In combination with an intelligent monitoring system it guarantees simple operability as well as maintainability. Reduced fuel consumption, very low brake and tire wear as well as high robustness of the system minimize the operating cost. The eco-friendly engine complies with the latest standards EU Stage IV and EPA Tier 4 final and thus minimizes the underground ventilation requirement. The focus is on ergonomics with a large foot box, two-pedal control with an inch-function and controls adjustable for all operator sizes. The LF-21H is available in different cabin variants for a highly efficient mining in low seam applications of min. 2.5 m. A Z-link for hard rock applications is designed for high breakout forces and loading of matching dump trucks. A low profile version of this Z-link and the lowest machine height of its class provide superior visibility even in confined spaces. A great variety of optional assistance systems such as collision avoidance systems and the automatic loading mode grant a high safety standard and simple operation.

MAIN FEATURES

  • Compact design with lowest machine profile of its class for superior visibility
  • Efficient Drive System (EDS) for highest productivity and reduced maintenance costs
  • Best power to weight ratio and rimpull of its class
  • Fuel efficient and clean engine (EPA Tier 4f / EU Stage IV)
  • Intelligent power management increases productivity and saves fuel
  • Extremely robust GHH frame and system design resulting in lowest operating cost
  • Z-link optimized for loading of dump trucks
  • Ergonomic ROPS/FOPS safety cabin with large legroom, excellent visibility and intuitive operator interface with 12” touch screen display
  • All daily maintenance points accessible from ground level
  • Centralized service points
  • Advanced automation features and condition monitoring systems
  • Features such as semi-automatic loading, automatic productivity measurement and active collision avoidance systems

TECHNICAL SPECIFICATIONS

  • Capacities
    Payload capacity21 000 kg
    Standard bucket capacity (SAE heaped)10.5 m³
    Max. tramming speed23 km/h
    (laden fwd/rev, on level road)
    Max. rimpull (steady up to 2 km/h)420 kN
    Breakout force – high reach/ore pass350/300 kN
    Maximum admissible gradient28%
    Max. transverse slope15%
    Max. admissible ambient temperature52 °C
  • Weights (Standard machine)
    Operating weight58 358 kg
    Front axle, empty26 896 kg
    Rear axle, empty31 462 kg
    Front axle, loaded58 253 kg
    Rear axle, loaded21 105 kg
  • Engine
    ManufacturerDeutz
    TypeDeutz TCD12.0V6
    Emission StandardEPA Tier 4f / EU Stage IV
    DesignWater cooled diesel engine
    Power375 kW / 2 100 min-1
    Air intake systemDry air filter
    Exhaust system2x SCR, heat insulation
    Starter power / voltage6.6 kW / 24 V
    Alternator current / voltage55 A / 28 V
    Engine optionDeutz TCD2015V6
    Emission StandardEPA Tier 3 / EU Stage IIIA
    Exhaust systemCatalyst, silencer
  • Drive Train
    Pump transfer gearboxStiebel
    TypeHelical gearbox
    Axle transfer gearboxRögelberg
    TypeHelical gearbox
    PumpsPiston type, electro-proportional control
    MotorsPiston type, electro-proportional control
  • Axles
    Front axleRigid planetary axle
    ManufacturerKessler
    TypeD111
    DifferentialStandard
    Rear axleRigid planetary axle, oscillation ±8°
    ManufacturerKessler
    TypeD111
    DifferentialNo Spin
  • Tires
    Front tires875/ 65 R33
    Tire pressure7.5 ± 0.1 bar
    Rear tires875/ 65 R33
    Tire pressure5.5 ± 0.1 bar
  • Brakes (Service and Parking)
    DesignMulti disk spring brake (SAHR)
  • Steering
    DesignHydraulic articulated power steering
    ControlSmooth joystick control, end cushioning
    Safetyinterlock protection, emergency steering (opt.)
    System pressure (load sensing)250 bar
  • Dump / Hoist Hydraulic System
    System pressure (load sensing)280 bar
    Boom raising time8.4 s
    Boom lowering time4.5 s
    Tipping time1.8 s
  • Filling Volumes
    Fuel tank600 l
    Hydraulic tank535 l
  • Electrical Equipment
    Operating voltage24 V
    Battery2 x 12 V / 180 Ah
    Control systemCANopen-Safety bus and SIL certified PLC (high functional safety)
    Main / reverse headlightsLED
    Additional headlights and position lightsLED
  • Main Options
    Central lubrication systemBrake release tow hook
    Fire suppression systems (manual / automatic) Ansul / Protecfire / othersElectric brake release pump
    Fire extinguishersAutomatic brake application (ABA)
    Optional bucket sizesElectric emergency steering
    Ground engagement tools (G.E.T)Electric hydraulic filling pump
    Automatic ride controlWiggins fuel fill system
    Payload weighing system with automatic productivity monitoringWiggins fill set (hydraulic oil)
    Semi-automatic loading mode (TIMO)Wheel chocks and brackets
    Bucket shaker for faster dischargeTire pressure monitoring
    Air condition / HeatingRemote Monitoring System (WiFi)
    Camera systemCorrosion protection kit
    Collision avoidance systemsLow temperature kit
    Audio-visual reverse alarmRadiator blow-out (automatic radiator cleaning)
    Radio remote controlOptional differentials
  • Service Options
    Electronic / Online spare parts cataloguePreventive maintenance kits
    Operator trainingRepair and rebuild kits
    Technical trainingMaintenance / MARCcontracts
    Service tool box