Bulldozer DFY-2

The large horse-power bulldozer is independently developedby China, with the characteristics of advanced structure, flexible operationand high production efficiency. It can be equipped with various blades andother accessories, such as ripper, capstan etc., and can widely meet users'working requirements. The cab of bulldozer has advantages of wide visual field,comfort, strong adaptability and low price.
The bulldozer is 220 horse power track-type dozer with elevated sprocket,hydraulic direct drive, semi-rigid suspended andhydraulic controls. It can be equipped with straight tilting blade, angleblade, coal pushing blade, single shank ripper, and three-shank ripper. The cabis installed with air conditioner. Its new structure, good performance, highworking efficiency, safety and comfortable operation condition, reliable entirequality, excellent service is your wise choice.

Main Specifications
Operating weight(not including ripper):23800Kg
Ripper weight: 3900Kg
Engine flywheel power:162kW
Ground pressure(without ripper):71.9kPa
Ground clearance :404mm
Ground contact length :2890mm
Track center distance :1980mm
Overall dimensions(L×W×H) :
(with single shank ripper) 7604×3823×3402(with straight tilting blade) Gradeability :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):350m3/h

Diesel Engine Specifications
Model:: NT855-C280 (Cummins)
Type ::water cooled, single line, vertical, four strokes, turbocharged,6-cylinders, diameter 140mm
Rated speed::2100 RPM
Flywheel power (speed at 2100 rpm)::162 kW
Starting mode:: 24V electric starting

Torque converter
Torque converter used in bulldozer is power separating hydraulic-mechanic type.

Transmission assembly
It integrates center drive, transmission and speedchanging control valve into one component. It can be assembled or disassembledas assembly or as a part. It is very convenient to service. Transmission ismulti-stage planetary gear drive to realize modular assembling anddisassembling. The shift can be changed among 1st gear, 2nd gear, 3rd gearforward or reverse rapidly, through multi-functional control valve.
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 hydraulic, constant meshed type. Steering clutch is hydraulicpressed, non-constant engaged clutch. The action of steering and braking iscombined, operation manually to realize steering slowly, sharply and braking.The braking of entire machine can be realized through the pedal. Parkingbraking rod is designed to keep the undercarriage system in braking conditionwhen starting the engine and guarantee the machine not to slip on slope whenstarting the engine.

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

Hydraulic system of the machine
It is composed of oil pump, transmission control valve, steering and brakingcontrol valve, sequence valve, relief valve at torque convertor outlet, filter and lines. Main pump: Gear pumpOil flow:160　L/min Working pressure::3.1MPa

Rops with air conditioner cab
The cab is hexagonal thin wall box-type structure. Glass is mounted at sixsides with wide viewing area. Pulling and pushing glass is installed at backside. Air conditioner is top-mounted with functions of cooling and heating. Thestructure of Rop is rigid. It can protect the driverefficiently when the bulldozer is in special condition.

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 oilpump, cylinder, inlet valve group diverter valve group, oil tank line andcontrolling 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 infront and at rear of the frame and seven-track roller. Recoil spring andcylinder adjuster is mounted at the undercarriage. The rear end ofundercarriage frame is supported on the pivot. The front end is articulatedwith the equalizer bar. Choose different undercarriage system according todifferent implement. The customer is required can guarantee center gravity ofthe machine to be at best efficient position. Choosing different width of trackshoe can ensure the bulldozer developing its optimum traction efficiency.

Maintenance filling capacity

Optional implement and components (＊ordinary)
1) Cab
A. Rops with air conditioner cab ＊
B. 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-shank ripper
C. back drawing mechanism
4) Track shoe of undercarriage
Optional track shoe width
A、510mm
B、560mm ＊
C、660mm
D、914mm
5) Winch dozer used in forest, desert dozer, LGP dozer, HW dozer can be chosenaccording to special requirements of customer.

Specifications