SD7 Bulldozer

SD7 bulldozer is a track type dozer with elevated sprocket, hydraulic direct drive, semi-rigid suspended and hydraulic controls. Attachments like straight tilting blade, angle blade, coal pushing blade, single shank ripper, three shanks ripper, are compatible with this 230 horse power dozer. It has an ROPS and air-conditioned cab. With features like new structure, good performance, high working efficiency, safe and comfortable operating condition, this bulldozer is your wise choice!

Main Specifications

Operating weight (not including ripper) 23800¡§K
Ripper weight 3900¡§K
Ground pressure (without ripper) 71.9kPa
Track center distance 1980mm
Grade ability Latitude30 Transverse 25
Ground clearance 404mm
Overall dimensions (LxWxH) 5677x3500x3402 (with straight tilting blade)

Specifications of Diesel Engine

Model A NT855-C280 (Cummins)
Rated speed 2100 RPM
Flywheel power (speed at 2100 rpm) 169 kW
Min. Fuel Consumption <= 235 (g/Kw.h)
Model B C6121ZLG10 (Shanghai )
Rated speed 2100 RPM
Flywheel power (speed at 2100 rpm) 169 kW
Min. Fuel Consumption <= 222 (g/Kw.h)
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) 350m3/h

Torque Converter
The torque converter applied in this SD7 bulldozer is of power separating hydraulic-mechanic type.

Transmission Assembly
The transmission assembly of this bulldozer integrates center drive, transmission and speed control valve in one. It can be assembled or disassembled conveniently. The transmission adopts multi-stage planetary gear drive to realize modular assembling and disassembling. Through the multi-functional control valve, the shift can be changed among 1st gear, 2nd gear, 3rd gear forward or reverse rapidly.

Steering and Braking Clutch
1. The steering clutch and braking clutch adopted in this bulldozer are adjustment-free, oil-type and multi-disc clutches.
2. The braking clutch is of spring-pressed, hydraulic separated, constant meshed type. The steering clutch is of hydraulic pressed, non-constant type.
3. While the steering and the braking clutches are operated at the same time, slow steering, sharp steering and braking can be realized.
4. The braking of the entire bulldozer can be achieved through the pedal.
5. Parking braking rod works to keep the undercarriage system in braking condition while the engine is started. It guarantees the machine not to slip on slopes when the engine is started.

Final Drive
This bull dozer adopts two-stage planetary reduction gear mechanism as its final drive. It is mounted outside of the steering and braking clutch. The combined sprocket segment can be conveniently assembled or disassembled for maintenance.

Hydraulic System
The hydraulic system of SD7 bulldozer is made up of oil pump, transmission control valve, steering and braking control valve, sequence valve, relief valve at torque converter outlet, filter and lines.

Main pump Gear pump
Oil flow 160 L/min
Working pressure 3.1 MPa

ROPS Cab with Air Conditioner
1. The cab is of hexagonal, thin-wall, box-type structure.
2. Glasses are mounted at six sides, which provides broad view to the driver.
3. Pulling and pushing glass is installed at the back side.
4. An air conditioner is mounted at the top. It works to either cool or heat the cab.
5. The structure of Rop is rigid, which protects the driver efficiently when the bulldozer is in special condition.

Implement Hydraulic System
Mainly consists of oil pump, cylinder, inlet valve group diverter valve group, oil tank line and controlling parts, implement hydraulic system functions to control the lifting, lowing and tilting of the blade. It can also be used to control the lifting, lowing of the ripper.

Main pump High pressure gear pump
Oil flow 194 L/min
System working pressure 18.6 MPa

Left and Right Undercarriage System
1. The track is of triangle shape and elevated sprocket.
2. There are two idlers in the front and at the rear of the frame and seven track rollers.
3. Recoil spring and cylinder adjuster are mounted at the undercarriage.
4. The rear end of undercarriage frame is supported on the pivot.
5. The front end is articulated with the equalizer bar.
6. Different undercarriage systems are available for different implements.
7. The center gravity of the bulldozer can be adjusted at the best position.
8. Different width of track shoe can be chosen so as to ensure the optimum traction efficiency of this bulldozer.

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
1. Cab
Rops with air conditioner cab (standard configuration), Rops cab or Rops canopy
2. Front mounted implement
Straight tilting blade (standard), angle blade, or U-type blade
3. Rear mounted implement
Single shank ripper (standard), three shanks ripper, or back drawing mechanism
4. Track shoe of undercarriage, optional track shoe width
510mm, 560mm (standard), 660mm, or 914mm
5. Winch dozer for forest application, desert dozer, LGP dozer, and HW dozer are available upon request.