Road-rail power shovel
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Road-rail power shovel MPS78UU-10

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Road-rail power shovel with the highest level of safety in the industry

  • Provided with heavy weight railway equipment to ensure excellent stability on tracks.
  • The hydraulic pump with a high discharge rate increases the running and working speed.
  • Capable of working with a large bucket (0.3 m3).
  • Provided with rail clamps (patented) to work stably on unstable tracks, such as bridges.
  • Provided with an emergency engine unit, which ensures running even in case of trouble with the main engine.
  • Provided with a hydraulic circuit for track work to enable installation of special attachments.
  • Attachments can be replaced quickly from the cockpit.
  • Equipped with automatic stop device to prevent contact with overhead lines and trains traveling on adjacent tracks.
  • Equipped with insulated rubber crawlers dedicated to track work.
  • Applicable to standard gauge (1,435 mm) and narrow gauge (1,067 mm)
    * Changeable to other gauges.
  • Equipped with a mobile crane to perform lifting work
  • All models are provided with back monitors.
Road-rail power shovel

Road-rail power shovel

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Examples of work
Major dimensions (MPS78UU-10)
Major dimensions
Principal specifications
Item MPS78UU-10
Base vehicle Komatsu PC78UU-10
Total working weight(kg) 11500
Type of track roller Rubber integral insulated shoe
Fuel tank(L) 125
Overall length (during transportation) (mm) 6040
Overall width(mm) 2330
Overall height (on track) (mm) 2730
Swing radius (mm) 1390
Overall length of crawler (mm) 2840
Bucket capacity rang(m3 0.09~0.3
Bucket offset(mm) Left 1050 Right 1050
Max. digging depth(mm) 4230
Max. digging radius (mm) 6400
Max. digging height (mm) 7330
Max. dumping height (mm) 5260
Min. swing radius (mm) 1200
Max. digging power (kN) 61.3
Max. speed of crawler (km/h) 低速2.8 高速5.0
Gradability (degrees) 35
Ground contact pressure (kgf/cm2) 0.36
Track running performance
Max. speed (km/h) 30
Track running performance 35/1,000
Counterbalance braking distance (m) In fine weather: 18m In wet weather: 25m
Braking distance(m) In fine weather: 10m In wet weather: 14m
Rated crane load MPS78UU-10
Working radius (m) Rated load (t)
1.8〜3.3 1.70
3.5 1.6
4.0 1.3
4.5 1.1
5.0 0.9
5.44 0.8
Major units
Item MPS78UU-10
Model Komatsu SAAD4D95LE-6
Type Air-cooled direct injection turbo
Total displacement (cc) 3260
Rated output (PS/rpm) 68.9/1950
Hydraulic unit
Type and quantity of hydraulic pumps Variable capacity piston type, 1 pc.
+ gear type, 2 pcs.
Hydraulic pump discharge (L/min) 80×2+60+12.7
Max. set pressure (kgf/cm2) 270
Type and quantity of control valves 10-spool valve: 1 pc.
Operation method Hydraulic assist
Crawler running motor Variable capacity piston type
Crane unit
Type Articulated jib mobile crane with hydraulic shovel
Rated lifting load (t) 1.7
Crane safety devices Overload prevention device, pressure rise prevention valve, sudden drop prevention valve, overload alarm, outer locking hook, level board and external signal lamp
Track running equipment
Wheel Diameter: 460 mm Width: 125 mm. wheel back to back gauge: 990 mm (narrow gauge), 1360 mm (standard gauge) 4 insulated wheels
Axle 2 axles (diameter 100 mm), 1 axle drive Distance between axles: 2620 mm
Motive power source Hydraulic motor with counterbalance valve (output 48 kW, torque 765 N.m), 2 units
Drive Chain driving system for each axle
Brake Hydraulic disc brake for each axle (braking torque: 0.5 t.m) + counterbalance valve for each axle, with parking braking system and escape lash prevention device
Rail clamp 4 pairs at front and rear for keeping body during working, hydraulically actuated Each clamp provided with insulating material Clamping force: 2.3 t
Safety devices in track
Emergency engine Air-cooled 4-cycle single cylinder diesel engine (406 cc, 10 ps)
Boom height limits 3.8 m: Yellow lamp ON 4.2 m: Red lamp ON + automatic stop of boom
Boom insulation High voltage plastic sheet for electrical use (withstand voltage: 7000 V)
Device for preventing interference with adjacent lines Key switch type. In setting: Red lamp ON + warning sound + automatic stop of swing
Other safety devices Hydraulic motor release clutch, hydraulic motor free valve, train proximity alert system, front and rear lamps, flasher, fence for crew, connecting hole, coupling rod and back monitor
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