Crawler Bulldozer SD7
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Crawler Bulldozer SD7, bulldozer, crawler , Chinese brand
| Engine | |||||||
| Model | Cummins NTA855-C280 | ||||||
| Type | Water cooled, single line, vertical, four strokes, turbocharged, 6-cylinders, diameter 140mm | ||||||
| Flywheel power, kW | 177 | ||||||
| Rated speed, r/min | 2100 | ||||||
| Number of cylinders - bore x stroke, mm | 6-ø140 x 140 | ||||||
| Starting method | 24V electric starting | ||||||
| Battery | 24V | ||||||
| Transmission system | |||||||
| Torque converter | Power separating hydraulic-mechanic type | ||||||
| Transmission | It integrates center drive, transmission and speed changing control valve into one component. It can be assembled or disassembled as a assembly or as a part. It is very convenient to service. Transmission is multi-stage planetary gear drive to realize modular assembling and disassembling. The shift can be changed among 1st gear, 2nd gear, 3rd gear forward or reverse rapidly, through multi-functional control valve. | ||||||
| Steering clutch | Wet, multiple-disc, hydraulically pressed, non-constantly engaged | ||||||
| Steering brake | Pressed by spring, separated hydraulically, constant meshed type | ||||||
| Final drive | Final drive is two-stage planetary reduction gear mechanism, splash lubricated. It is mounted at outside of steering and braking clutch. Combined sprocket segment is very convenient for assembling, disassembling and service. | ||||||
