SD8 Earthmoving Earthwork Dozer,330HP Crawler Bulldozer Engine:NTcummins NTA855-C400(BC) Revelution:1900

SD8 Earthmoving Earthwork Dozer,330HP Crawler Bulldozer

Operating weight(not including ripper): 40000 kgsRipper weight: 4300 kgsEngine flywheel power/RPM: 246 kw(335HP)/1900r/min Track ground contact length: 3280 mm Ground pressure(without ripper): 105 kPa Track contact length: 2200 mm Overall dimensions:8090x4172x3952(with single shank ripper) Gradeability: latitude30degrees transverse 25degrees Ground clearance: 485mm Theory travel speed (km/h)1st gear forward 0-3.9 1st gear backward 0-4.8 2nd gear forward 0-6.8 2nd gear backward 0-8.4 3rd gear forward 0-11.9 3rd gear backward 0-14.8 Dozing operating rate (moving distance 40m ) 452m 3 /h

Main specifitions (the spare parts are interchangeable with KOMATSU)

Diesel engine specifications

Model:NTA855-C400 (BC) Type: water cooled, single line, four strokes, turbocharged, 6-cylinders, diameter 140mm Rated speed: 1900r/min Flywheel power: 246kw(335HP) Torque storage coefficient: 24.5% Start mode: 24v electric starting

Torque converte

Power separating, hydraulic-mechanic drive, single stage torque converter is used in SD8 elevale sprocket bulldozer.

Transmission assembly

It integrates center drive, transmission and speed changing control valve into one component. It can be assembled or disassembled as assembly or as a part. It is very convenient to service. Transmission is multi-stage planetary drive to realize modular assembling and disassembling. Gear the shift can be changed among 1st gear, 2nd gear, 3rd gear forward or reverse rapidly, through multi-functional control valve. 

Steering and braking clutch

Steering and braking clutch are adjustment-free, oil-type, multi-disc clutch. The braking clutch is pressed by spring, separated hydraulicly, constant meshed type. Steering clutch is hydraulic pressed, non-constant engaged clutch. Steering and braking acts simultaneously, operated manually to realize steering slowly, sharply and braking. The braking of entire machine can be realized through the pedal. Braking rod is designed to keep the undercarriage system in braking condition and guarantee the machine not to slip on slope when starting the engine.

Final drive

Final drive is two-stage planetary reduction gear mechanism. It is mounted at outside of steering and braking clutch. Combined sprocket segment is very convenient for assembling, disassembling and service.

Undercarriage system

SD8 dozer utilizes elastic-mounted undercarriage. The track is triangle shape. The sprocket is elevated. Through floating function of continuous auxiliary suspension device, the machine can travel near obstacle on the ground to improve travelling stability and comfortable of the driver. Ground contact area is increased. Performance of travelling and traction is raised.

R.o.p.s cab

The  cab is hexagonal thin wall box-type structure. Glass is mounted at six sides with wide viewing range. Pulling and pushing glass is mounted at back side. Air conditioner can be installed according to the requirement of customer. The structure of Rops is rigid. It can protect the driver efficiently when the bulldozer is in special condition. Adjustable operator' s seat bias to right 15?degrees and fuel tank, engine hood, track are tilting, the driver can has a good front and rear sighting range.

Implement hydraulic system

Implement hydraulic system can control lifting, lowering and tilting of the blade. It also can control the moving of ripper. It mainly consists of oil pump, cylinder, valve group, oil tank line and controlling parts. Implement pump is two group vane type pump.

Front pump:Displacement: 129ml/r Rated pressure:21MPa Rated speed:2000r/min Rear pump: Displacement 56ml/rRated pressure:21MPa Rated speed:2000r/min Rated operation pressure of blade lifting system:17.5MPa Rated operation pressure of tilting system: 18.3MPa

Hydraulic system of tractor

It is composed of oil pump, transmission control valve, steering and braking control valve, sequence valve, torque converter outlet relief valve, filler and oil line, etc. Main pump is three group gear pump. The main performance is as following: Lubricating pump: Rated displacement: 90 ml/r Rated pressure:0.4 MPa Rated speed: 2000r/min Working pump: Rated displacement: 115 ml/r Rated pressure: 3.1? MPa Rated speed: 2000 r/min Oil draining pump:Rated displacemen: 160 m/r Rated pressure: 0.5 MPa Rated speed: 2000 r/min

Maintenance filling capacity

Fuel tank: 753L Water tank and diesel engine cooling water: 125L Camshaft case of diesel engine: 47L Bevel gear case hydraulic system of tractor: 167L Final drive (one side):23L Rear seat buffer spring case (each side): 30L Pivot lubricating: 13L Implement system oil tank:89L

SD8 Earthmoving Earthwork Dozer,330HP Crawler Bulldozer