The 255E is your no fuss solution for carriers between 0.9 and 2.5 tons. The 110 kg hammer is protected by box type housing.
High-Performance Excellence Line
Small Range 777E Hammer
Reliable, Versatile, and High-Performance
Reliable and versatile Rammer 777E is designed for optimum carrier compatibility in the 2.6 to 9.5 tonne range. The 390 kg hammer has been designed to please the specific demands of rental fleet operators. The 777E features a pivoting hose connecting block and a reversible manifold that allows for right or left hand hose connections, in addition to its ability to accept a wide range of oil flows and pressures. The Rammer 777E comes with the remote monitoring hardware RD3 installed.
Key Features
Key Applications
Primary demolition, Secondary demolition, Recycling, Boom mounted applications, Trenching, Landscaping, Cutting of asphalt or frozen ground, Ground compacting
Single Part Tool
Single part tool bushing retained with shared tool pin
Specifications
| Minimum working weight, flange mounted *1 | 390 kg | 860 lb |
| Weight | 320 kg | 710 lb |
| Working length | 1449 mm | 57.0 in |
| Impact rate (frequency) | 500 – 1700 bpm | |
| Operating pressure | 90 – 140 bar | 1305 – 2030 psi |
| Oil flow range | 40 – 120 l/min | 10.6 – 31.7 gal/min |
| Pressure relief setting *2 | 140 – 190 bar | 2030 – 2755 psi |
| Pressure relief max | 220 bar | 3190 psi |
| Pressure in LP-circuit | 36 – 38 bar | 520 – 550 psi |
| 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, min. inner diameter | 19 mm | 0.75 in |
| Return line size, min. inner diameter | 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 | |
| Skid steer, robot weight, optimum | 3.3 – 5.2 t | 7300 – 11500 lb |
| Skid steer, robot weight, range *3 | 2.6 – 6.3 t | 5700 – 13900 lb |
| Miniexcavator, tractor backhoe weight, Optium | 4.9 – 7.8 t | 10800 – 17200 lb |
| Miniexcavator, tractor backhoe weight, Range *3 | 4.3 – 9.5 t | 9500 – 20900 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 wear parts | ||
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