Product Weight


Product Carrier Weight


Oil Flow Range
40-120 l/min

Designed to satisfy the specific demands of rental fleet operators, the 370 kg 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 to work with a broad range of carrier optimum fleet utilization.

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 suppressed
  • No tie rods
  • CBE+ (Constant blow energy plus)


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

Compatible with Standard Chisel Tool, Moil Point Tool, Asphalt Cutting Parallel Tool, Asphalt Cutting Traverse Tool, Compacting Tool and Special Tool Grease 

  Metric Imperial
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 in  
Return line connection (OUT) BSPP-internal 3/4 in  
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 weight optimum 4.9-7.8 t 10800-17200 lb
Miniexcavator weight, range *4 4.3-9.5 t 9500-20900 lb
Miniexcavator weight, range *4 4.3-5.2 t 7300- 11500 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 5700-13900lb
Noise level, measured (2000/14/EC) 120 dB(A)  
Noise level, guaranteed (2000/14/EC) 124 dB(A)  

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