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Excavating Machine A7-2 1. Cummins diesel engine, water cooled, direct injection, turbo-charged and after cooled, electric control, it satisfies the emission requirement of Europe standard, grade II 2. Control of constant power of single pump, limited power of three pumps for reasonable distribution of power 3. Starting with zero displacement so as to reduce the moment of resistance at starting 4. Technique with pressure cut to protect hydraulic system and reduce the system heat 5. Secondary overloading for swing and normal closed brake for swing and travel ensure smoothly brake 6. Integrated oil& water cooler with compact conformation 7. The working attachment realized automatic level crowding with bucket to increase the bucket filling factor 8. Attachment designed by CAD, case shape and casting-welding structure realizing the high strength 9. Automatic central lubrication two pumps of system by control of micro-electronics to save daily lubrication 10. Better reliability with Parker hose &seals and Trelleborg cylinder seals 11. The Technique with disassembled undercarriage which is advanced to transport the machine quickly 12. LCD displayer, electronic monitoring & alarm, trouble record system 13. Cab with fixed elevation and integrated is provided with large tri-dimensional ventilation, fresh air circulation, large capacity air condition without fluorine 14. The operator's cab with the wide vision field and the streamlined appearance, matching the decoration and function with human nature, and offering the working environment in a car.No. Item Unit Data Face shovel Backhoe 1 Machine weight t 75 73 2 Bucket capacity Standard m 3 4.5 3.5 Range m 3 4.0~5.5 2.3~5.0 3 Diesel engine Model QSM11-C400 Power /Speed kW/rpm 298/1800 Fuel tank Capacity L 820 4 Hydraulic system Type Three pumps and three loops, limit load variable system Max. pressure of main oil circuit MPa 32 Max. flow of main oil circuit L/min 2×415 Swing type Independence open type Flow of swing oil 1×415 Operating style Pilot control Hydraulic oil tank capacity L 780 5 Performance Swing speed r/min 6.0 Travel speed km/h 3.1 Max. pulling force kN 457 Gradeability % 70 Ground pressure MPa 0.097 Circulating time of operation s 20 6 Working date Boom length mm 4450 7000 Stick length mm 2900 3400 Max. digging radius mm 9280 12290 Max. digging depth mm 2680 7741 Max. digging height mm 9745 10286 Max. unloading height mm 7680 7340 Max. digging force of stick kN 334 233 Max. breakout force of bucket kN 357 285 No. Component Name Model Manufacturer 1 Diesel engine QSM11-C400+AM365 Cummins/America 2 Main pump 2×A11VO190+1×A11VO190LR/11R Rexroth/Germany 3 Main valve 8M8-32+M032 Rexroth/Germany 4 Double join valves MO/2MO Rexroth/Germany 5 Swing motor A2FE125/61W Rexroth/Germany 6 Swing reduction gear GFB80T3B Rexroth/Germany 7 Travel motor A2FE125/61W Rexroth/Germany 8 Travel reduction gear GFT110T3 Rexroth/Germany 9 Logical valve 026710 Rexroth/Germany 10 Isolating valve MH3WA06CG Rexroth/Germany 11 Isolating valve MH3WA06UG Rexroth/Germany 12 Solenoid valve 4WE6C6X Rexroth/Germany 13 Solenoid proportional pressure-reducing valve MHFP04G1 Rexroth/Germany 14 Armrest Pilot Valves 4TH6E70 Rexroth/Germany 15 Foot pedal pilot valves 2TH6NRP70 Rexroth/Germany 16 Foot pedal pilot valves for opening or closing bucket 2TH7Q06 Rexroth/Germany 17 Track Ass. J01083DOM ITM or Berco/Italy 18 Driver’s Seat DS-85H Grammer/China 19 Hydraulic hose + System seal Parker/America 20 Cylinder seal Trelleborg/America 21 Automatic lubricating system BEKA/Germany or LINCOLN/America 22 Air-condition Wuhan Jingdong/China
