777

Designed to satisfy the specific demands of rental fleet operators, the 370 kg Rammer 777, is designed for optimum carrier compatibility and installation flexibility. A flange top-mount for adapter installation, pivoting hose connecting block, reversible manifold, right or left-hand hose connections, and the ability to accept a wide range of oil flows and pressures allow Rammer 777 rockbreaker to work with a broad range of carrier optimum fleet utilisation.

Rammer 777 benefit from 40 percent more power and 20 percent higher blow frequencies than the model it replaces for enhanced power-to-weight ratios and highest possible productivity levels.

  • Single lower tool bushing
  • Membrane type accumulator
  • Twin-handed
  • Sound supressed
  • CBE+ (Constant blow energy plus)
  • No tie rods

Applications

  • Primary Demolition
  • Secondary Demolition
  • Trenching
  • Asphalt Cutting
  • Ground Compacting

Specifications

Weight 315 kg 690 lb
Working length 1449 mm 57.0 in
Minimum working weight, flange mounted  *1 385 kg 850 lb
Impact rate (frequency) 500 - 1700 bpm
Operating pressure 90 - 140 bar 1305 - 2030 psi
Pressure relief min  *2 140 - 190 bar 2030 - 2755 psi
Pressure relief max 220 bar 3190 psi
Pressure in LP-circuit 36 - 38 bar 520 - 550 psi
Oil flow range 40 - 120 l/min 10.6 - 31.7 gal/min
Back pressure max 20 bar 290 psi
Input power 28 kW 38 hp
Tool diameter 80 mm 3.15 in
Pressure line connection (IN) BSPP-internal 3/4"
Return line connection (OUT) BSPP-internal 3/4"
Pressure line size  *3 19 mm 0.75 in
Return line size  *3 19 mm 0.75 in
Optimum oil temperature 40 - 60 °C 104 - 140 °F
Allowed oil temperature range -20 - 80 °C -4 - 176 °F
Optimum oil viscosity at operating temperature 30 - 60 cSt
Allowed viscosity range 20 - 1000 cSt
Miniexcavator, tractor backhoe weight, Optium 4.9 - 7.8 t 10800 - 17200 lb
Miniexcavator, tractor backhoe weight, Range  *4 4.3 - 9.5 t 9500 - 20900 lb
Skid steer, robot weight, optimum 3.3 - 5.2 t 7300 - 11500 lb
Skid steer, robot weight, range  *5 2.6 - 6.3 t 5700 - 13900 lb
Noise level, measured (2000/14/EC) 120 dB(A)
Noise level, guaranteed (2000/14/EC) 124 dB(A)
*1   Includes average mounting bracket and standard tool
*2   Minimun setting = actual operating pressure + 50 bar or 725 psi
*3   minimum inner diameter
*4   Check carrier's lifting capacity from carrier manufacturer
*5   Check carrier allowed attachment weight from carrier manufacturer. Check application requirements.

 

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