ETW,ETW国际,上海ETW,ETW International,China ETW,ETW Manufacturer,Bulldozer SWD8

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Bulldozer SWD8

Main Specification of Bulldozer

Operating weight(not including ripper)	40000㎏
Ripper weight-	4300㎏
Engine 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(L×W×H)	8090×4172×3952(with single shank ripper)
-Gradeability-	latitude30 ° transverse 25°
Ground clearance--	485mm
Theory travel speed (km/h) 1st gear	forward 0-3.9; reverse 0-4.8
Theory travel speed (km/h) 2nd gear	forward 0-6.8; reverse0-8.4
Theory travel speed (km/h) 3rd gear	forward 0-11.9; reverse0-14.8
Dozing operating rate (moving distance 40m)-	452m³/h
Diesel engine specification
Model	Cummins NTA855-C400 (BCⅢ)
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
Power transmitting system
Power separating, hydraulic-mechanic drive, single stage torque converter is used in SWD8 elevate sprocket bulldozer. It integrates center drive, transmission and speed changing control valve into one component. It can be assembled or disassembled, and is 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. Braking clutch and steering clutch are adjustment-free, oil-type, multi-disc clutch. The former is pressed by spring, separated hydraulically, constant meshed type, and the later is hydraulic pressed, non-constant engaged clutch. Steering and braking act simultaneously, operated manually to achieve 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 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.
Hydraulic system
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
Lubricating pump Rated pressure	0.4 MPa
Lubricating pump Rated speed	2000 r/min
Working pump Rated displacement-	115 ml/r
-Working pump Rated pressure	3.1 MPa
Working pump Rated speed	2000 r/min
Oil draining pump Rated displacement	160 m/r
Oil draining pump Rated pressure	0.5 MPa
Oil draining pump Rated pressure---	0.5 MPa
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 pumps. The main specification is as following:
Front pump displacement--	129ml/r
Front pump rated pressure	21MPa
Front pump rated speed	2000r/min
Rear pump displacement-	56ml/r
Rear pump rated pressure	21MPa
Rear pump rated speed	2000r/min
Rated operation pressure of blade lifting system-	-17.5MPa
Rated operation pressure of tilting system -	18.3MPa
Undercarriage system
SWD8 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 traveling stability and comfortable of the driver. Ground contact area is increased. Performance of traveling and traction is raised.
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

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