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The Ammann ARS 121 BS III Soil Compactor provides an outstanding price-to-productivity ratio and is the industry leader in compaction efficiency.

The hydrostatic drive of both wheels and the drum ensure traction and travel performance. The machine is equipped with an efficient turbocharged Cummins engine and reliable Rexroth hydraulics.

The roller is suitable for compaction of a wide range of soil, from silt to crushed stones.

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  • Industry-leading compaction efficiency
  • Easy and safe operation and maintenance
  • Superior fuel efficiency
  • Great stability and maneuverability thanks to no-rear-axle concept
  • No-axle concept for exceptional traction
  • Intuitive operator station
Dimensions Metric
A = Machine length 5460 mm
B = Wheel-base 2820 mm
C = Machine height 3030 mm
D = Machine height (removed CAB / ROPS) 2375 mm
E = Drum width 2130 mm
F = Machine width 2260 mm
G = Machine length (blade)
H = Ground clearance 450 mm
I = Drum diameter 1500 mm
J = Drum shell thickness 25 mm
K = Machine width (blade)
ARS 121
Operating Weight 11100 kg
Operating Weight max. 13080 kg
Drum load 6200 kg
Axle load 4900 kg
Static linear load (drum) 29,1 kg/cm
Drum and Axle
Working width 2130 mm
Drum diameter 1500 mm
Drum shell thickness 25 mm
Tyres 23,1×26″ mm
Steering angle (+/-) ±36 °
Oscillation angle (+/-) 10 ° °
Turning radius inner 3375 mm
Riding Characteristics
No. of Travel speeds 2
Maximum speed 0-11,5 km/h
Gradeability 0,4
Operating Hydrostatic
Parking SAHR
Emergency SAHR
Amplitude 1.85/1.15 mm
Frequencies 32/35 Hz
Centrifugal forces 277/206 kN
Fluid capacities
Fuel 410 l
Electrical installation
Voltage 12 V
Capacity of batteries 180 Ah
Make Cummins or Equivalent
Type 4BTA 3,9
Rated power 74/99 kW/HP
Standard BSIII
  • Operator platform with rails
  • Sun canopy
  • Heated ventilated cab
  • Lockable vandal guard
  • Engine air pre-cleaner
  • Working speed increase (up to 7 km/h)
  • Ammann traction optimizer
  • ROPS protection structure
  • Toolbox
  • Set of tools
  • Air conditioning for cab
  • Compaction meter

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