160KW 220HP Hydraulic Control Diesel Engine Crawler Dozer Machinery
for Engineering Construction
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.
SD7-220 horsepower, elevated sprocket bulldozer integrate modern science into it, its
new structure, good performance, high working efficiency, safety
and comfortable operation condition, realizable entire quality,
excellent service is your wise choosing.
Main specifications
Operating weight(not including ripper) | 23800 KGS |
Ripper weight | 3900 KGS |
Engine flywheel power | 162 KW |
Ground pressure(without ripper) | 71.9 KPa |
Ground clearance | 404 mm |
Ground contact length | 2890 mm |
Track center distance | 1980 mm |
Overall dimensions(L × W × H) | (with single shank ripper) 7604 × 3823 × 3402(with straight tilting blade) |
Grade-ability | Latitude30 ° Transverse 25 ° |
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 |
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 |
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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.
Rops with air conditioner cab
The cab is hexagonal thin wall box-type structure. Glass is mounted
at six sides with wide viewing area. Pulling and pushing glass is
installed at back side. Air conditioner is top-mounted with
functions of cooling and heating. The structure of Rop is rigid. It
can protect the driver efficiently when the bulldozer is in special
condition.
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 |
Optional implement and components ( ＊ ordinary)
- Cab
- Rops with air conditioner cab ＊
- Rops cab
c. Rops canopy | 2) Front mounted implement a. Straight tilting blade ＊ b. Angle blade c. U-type blade |
3) Rear mounted implement a. Single shank ripper ＊ b. Three shanks ripper c. Back drawing mechanism | 4) Track shoe of undercarriage Optional track shoe width - 510mm b. 560mm ＊
c. 660mm d. 914mm |
5) winch dozer used in forest, desert dozer, LGP dozer ,HW dozer
can be chosen according to special requirements of customer. |
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 |
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