The GHH Fahrzeuge dump truck MK-A20Ex is designed in accordance with the ATEX directive for use in potentially explosive areas and is based on the proven MK-A20. The newly revised vehicle with a water-cooled engine meets highest standards of ergonomics and maintainability. The machine is characterized by a robust and simple design and thus ensures very low operating cost at very high performances. The MK-A20Ex can be optimally combined with a LF-10Ex LHD.


  • For use in potentially explosive atmospheres (e.g. methane)
  • Complies with ATEX directive Group I Category M2 and GOST standard
  • Compact, simple and powerful design
  • Great power to weight ratio
  • ROPS / FOPS certified cabin
  • Extremely robust GHH frame and system design resulting in lowest operating cost
  • Customized body designs and sizes available
  • Proven technology only
  • Efficient combination with LF-10Ex LHD


  • Main Dimensions
    Length9 417 mm
    Width (at body)2 200 mm
    Height, laden (at body)2 149 mm
    Height, laden (above cabin)2 555 mm
    Std. body capacity (SAE heaped)10.0 m³
  • Tramming Capacities
    Max. tramming speed (laden fwd/ rev on level road)
    1st gear4.5 km/h / 4.8 km/h**
    2nd gear9.5 km/h / 10.0 km/h**
    3rd gear16.0 km/h / 17.5 km/h**
    4th gear26.5 km/h / 29.5 km/h**
    Max. admissible gradient25%
    ** Converter / Lock-up mode
  • Weights
    Operating weight18 955 kg
    Payload capacity20 000 kg
    Front axle, empty14 850 kg
    Rear axle, empty4 105 kg
    Front axle, loaded20 150 kg
    Rear axle, loaded18 850 kg
  • Engine
    TypeC9 Acert (explosion proof)
    DesignFlameproofed water cooled diesel engine
    Power205 kW / 2 200 min-1
    Air intake systemDry air filter, spark arrester
    Exhaust systemWater cooled exhaust line with temperature sensors, flame trap, catalyst, silencer
    Starter power/voltage6.6 kW / 24 V (Ex d)
    Three-phase alternator/voltage80 A / 28 V (Ex d)
    StandardsATEX Group I Category M2 / GOST
  • Drive Train
    Torque converter
    TypeSeries CL 8 000
    DesignSingle stage with Lock-up
    Power shift transmission
    TypeSeries R 32 000
    DesignFour gears forward / reverse (mechanic)
  • Axles
    Front and rearRigid planetary axle
  • Wheels and Tires
    Front wheels
    Rim size11.25 - 25 / 2.0
    Tire size16.00 - 25
    Tire pressure5.5 ± 0.1 bar
    Rear wheels
    Rim size11.25 - 25 / 2.0
    Tire size16.00 - 25
    Tire pressure8.0 ± 0.1 bar
  • Brakes (Service and Parking)
    DesignMulti disk spring brake (SAHR)
  • Steering
    DesignSwivel joint hydr. power steering
    Steering angle± 42°
    Outer turn radius8 165 ± 200 mm
    Inner turn radius5 023 ± 200 mm
  • Steering Hydraulic System
    Pump displacement volume50 cm³/rev
    System pressure130 bar
    Number of steering cylinders2
  • Dump / Hoist Hydraulic System
    Pump displacement volume50 + 10 +10 cm³/rev
    System pressure150 bar
    Number of dump cylinders1
    Body raising, laden7.0 s
    Body lowering, unladen7.5 s
  • Filling Volumes
    Fuel tank280 l
    Hydraulic tank230 l
    Engine with oil filter31.5 l
    Torque converter / power shift transmission36.5 l
    Front axle differential15.0 l
    Front axle planetary gear2 x 3.0 l
    Rear axle differential18.5 l
    Rear axle planetary gear2 x 3.0 l
  • Electrical Equipment
    Operating voltage24 V
    Battery2 x 12 V / 180 Ah (Ex d)
    EnclosuresEx d
  • Lighting System
    Main / reverse headlightsLED (Ex d)
    Additional headlightsLED (Ex d)
  • Main Options
    Central lubrication systemCamera system
    Fire suppression, manual / autoTailgate
    Open / Closed cabinAggressive environment kit
    Heating systemSpare wheel