NK165-II

NK165-II is a upgrade product of NK165-I bulldozer. It has characteristic of semi-rigid suspension, mechanical drive. The main clutch is hydraulic boosted. The articulated point of the implement cylinder is at both sides of the guard., With hydraulic pilot controlled , electric monitoring , good appearance, it can be used in road building , hydro-electric construction , field modification , port and mine development and
other construction .

Main specifications

Overall dimensions (L × W × H):5416 × 3297 × 3160 mm (straight); 5566 × 3726 × 3160 mm (angle)
Operation weight 17.8t (straight); 18.2t (angle)
Flywheel power 121kW
Max. drawbar pull 139.6 kN （  straight ）；  142.7kN （  angle ）(The efficient force depends on weight and ground surface adherence)

Ground pressure (atoperating weight)

 69KPa
Min. ground radium 3.9 m
Min. ground clearance 352.5 mm
Grade ability traight 30 °
Side 25 °

Diesel engine

Manufactured factory WEIFANG DIESEL ENGINE CO., LTD
Model WD615T1-3B
Type straight line, water-cooled, with four stroke, pressure boost and direct injection
Cylinders Number-bore diameter × travel distance 6-126x 130mm
Displacement 9.726 L
Rated RPM 1800 r/min
Rated power 130 kW
Max. torque 870 N · m/1200-1300 rpm
Fuel consumption (at rated working condition) 225 g /kW·h
Oil consumption 1.8 g /kW·h
Admissible altitude ≤ 4000m
Cooling method closed circulation water cooled
Starting method electrically starting at 24V pressure
Manufactured factory SHANGHAI DIESEL ENGINE CO., LTD
Model G128ZG8
Type straight line, water-cooled, with four stroke
Cylinders Number-bore diameter × travel distance 6-135x 150mm
Displacement 12.88 L
Rated RPM 1800 r/min
Rated power 130 kW
Max. Torque 838 N · m/1260 rpm
Fuel consumption (at rated working condition) 224 g /kW · h
oil consumption 0.7 g /kW · h
Admissible altitude ≤ 4000m
Cooling method closed circulation water cooled
Starting method electrically starting at 24V pressure

Main clutch and transmission
The flywheel clutch is constantly disengaged with Muti-powder-metal discs, which is operated by hydraulically boosting.The transmission is mechanical double levels controlled with constantly meshed helical gears, and coupling sleeve shift. It has five speeds FORWARS and four speeds REVERSE.

Travel speed (in theory 1800r/min engine speed)
Forward Reverse
 

Forward Reverse
First speed 2.5km/h First speed 3.5km/h
Second speed 3.3km/h Second speed 4.6km/h
Third speed 5.7km/h Third speed 7.9m /h
Forth speed 7.5km/h Forth speed 10.5km/h
Fifth speed 10.61km/h    

Steering and braking
The steering clutch is tighten by pressured springs and separated hydraulically with oil-type, multi-powder-metal discs.
The brakes are oil, two-direction floating band with mechanism foot pedals, hydraulic boosted. The steering and braking can be actuated in one control.

Final drive
The final drives are double reduction with spur gear and segment sprocket, which are sealed by floating oil seal for easy service.

Undercarriage system
Inner and outer beam of track roller frame are rectangular section " 八" frame .Track roller, carrier roller, idler are mounted with long life well sealed Duo-cone floating ring well sealed Duo-cone floating ring seal.

Track roller (each side):
 

Singe flange 4
Double flange 2
Carrier roller (each side) 2
Idler (each side) 1
Type of track single grouser combined
Tension mode of track hydraulic
Pitch 203mm
Number of shoes(each side)  38 pieces
Width of shoe 500mm
Length of track on ground 2570mm

Sealed and lubricated track
The pitch, numbers and width of track shoes are the same with the general track.

Implement hydraulic system
It consists of two group gear pump, pilot valve, main valve, cylinders, oil filter and lines.

Pump type two group gear oil pump
Pump flow  
Front pump:190L /min Pilot pump:19L /min
System pressure 12MPa

Cab
The cab with adjustable seat features low noise and wide visible range and contains electrical fan.
This following different kinds of cabs as follow can be chosen:
•Cab with air-conditioner
•Cab with Rops
•Simple structure canopy

Service refill

Fill location Capacity (L)
Radiator and diesel engine water 60
Lubricating system of diesel engine Oil 25 （G128）、20（WD615）
Flywheel house, main clutch oil 35
Transmission, bevel gear case Oil 95
Final drive (each side) Oil 24
Implement hydraulic system Oil 80
Fuel tank Oil 285
Idle track roller, carrier roller, front idler (each) Oil 0.35

Blade specifications

Blade Angle Straight Coal pushing
Width 3762mm 3297 mm 4240mm
Height 1140mm 1170 mm 1150mm
Max digging depth 400mm 420mm  
Max. Ground clearance 1000mm 852mm 1000mm
Vertical tilting angle 9 ° 8.5 ° 9 °

Note: ▲ indicates optional parts

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