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Specifications
China SD7 bulldozer/dozer1 Adopts CTA tech
2 with CUMMINS engine
3 with Triangle track
China SD7 bulldozer/dozer
SD7 bulldozer are 220 horsepower track-type dozer with elevated sprocket, hydraulic direct drive, semi-rigid suspended and hydraulic controls. It can be equipped with straight tilting blade, angle blade, coal pushing blade, single shank ripper, three shanks ripper. The cab is Rops with air conditioner.
Main specifications
Operating weight(not including ripper) |
23800 KGS |
||
Ripper weight |
3900 KGS |
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Engine flywheel power |
162 KW |
||
Ground pressure(without ripper) |
71.9 kPa |
||
Ground clearance |
404 mm |
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Ground contact length |
2890 mm |
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Track center distance |
1980 mm |
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Overall dimensions(L × W × H) |
(with single shank ripper) 7604 × 3823 × 3402(with straight tilting blade) |
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Grade-ability |
Latitude30 ° Transverse 25 ° |
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Theory travel speed (km/h | |||
1st gear forward 0-3.9 |
1st gear backward 0-4.8 |
||
2nd gear forward 0-6.5 |
2nd gear backward 0-8.2 |
||
3rd gear forward 0-10.9 |
3rd gear backward 0-13.2 |
||
Dozing operation rate(moving distance 40m ) |
350m 3 /h |
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Diesel engine specifications | |||
Model |
NT855-C280 (Cummins) |
||
Type |
water cooled, single line, vertical, four strokes, turbocharged, 6-cylinders |
||
Flywheel power(speed at 2100 rpm) |
162 kW |
||
Starting mode |
24V electric starting |
||
Transmission assembly
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.
Torque converter
Torque converter used in SD7 bulldozer is power separating hydraulic-mechanic type.
Steering and braking clutch
Steering clutch and braking clutch are adjustment free, oil-type , multi-disc clutch. The braking clutch is pressed by spring, separated hydraulically, constant meshed type. Steering clutch is hydraulic pressed, non-constant engaged clutch. The action of steering and braking is combined, operation manually to realize steering slowly, sharply and braking. The braking of entire machine can be realized through the pedal. Parking braking rod is designed to keep the undercarriage system in braking condition when starting the engine 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.
Hydraulic system of the machine
It is composed of oil pump, transmission control valve, steering and braking control valve, sequence valve, relief valve at torque convertor outlet, filter and lines.
Main pump |
Gear pump |
Oil flow |
160 L/min |
Working pressure |
3.1 MPa |
Implement hydraulic system
Implement hydraulic system can control lifting, lowing and tilting of the blade. It also can control lifting, lowing of the ripper. It mainly consists of oil pump, cylinder, inlet valve group diverter valve group, oil tank line and controlling parts.
Main pump |
High pressure gear pump |
Oil flow |
194 L/min |
System working pressure |
18.6 MPa |
Left and right undercarriage system
The track is triangle shape. The sprocket is elevated. There are two idlers in front and at rear of the frame and seven track roller. Recoil spring and cylinder adjuster is mounted at the undercarriage. The rear end of undercarriage frame is supported on the pivot. The front end is articulated with the equalizer bar. Choosing different undercarriage system according to different implement. The customer is required can guarantee center gravity of the machine to be at best efficient position. Choosing different width of track shoe can ensure the bulldozer developing its optimum traction efficiency.
Maintenance filling capacity | |
Fuel tank |
450L |
Water tank of cooling system |
118L |
Camshaft box of the engine |
20L |
Bevel gear case |
150L |
Implement oil tank |
100L |
Pivot lubricating tank |
15L |
Final drive |
15L |
Blade type |
Track ground contact length (A) |
Length of machine (B) |
Blade height (C) |
Overall height (D) |
Blade width (E) |
Track center distance (F) |
Digging depth |
Lifting height |
Blade capacity |
Straight tilting blade |
2895 |
7604 |
1280 |
3402 |
3823 |
1980 |
500 |
1170 |
6.3 |
Coal blade |
2895 |
7880 |
1350 |
3402 |
4428 |
1980 |
670 |
1115 |
8.1 |
Angle blade |
2895 |
7571 |
1100 |
3402 |
4253 |
1980 |
670 |
1115 |
5.2 |
LGP blade |
3185 |
7190 |
1150 |
3482 |
4382 |
2235 |
635 |
|
ect.
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