Main technical characteristic of hydraulic excavator NK450
○ Turbo-charged after-cooled diesel engine: environment protecting, power saving, its satisfied the emission of Europe Standard Grade.Ⅲ
○ Control with constant power of single pump, crossover power of two pumps for reasonably distributing and using the power
○ Starting with zero displacement so as to reduce the moment of resistance at starting
○ T echnique with pressure cut to protect hydraulic system and reduce the system heat
○ Secondary overloading for swing and normal closed brake for swing and travel ensure smoothly brake
○ Integrated oil& water cooler with compact conformation
○ The working attachment realized automatic level crowding with bucket to increase the bucket filling factor
○ Attachment designed by CAD, case shape and casting-welding structure realizing the high strength
○ Automatic central lubricating system to save daily lubrication
○ Multi-function meters show automatic illumination and detection of the various pressure ,temperature and oil level to have sound-light alarm
○ Better reliability with Parker hose &seals and Trelleborg cylinder seals
○ The Technique with disassembled undercarriage which is advanced to transport the machine quickly
○ Cab is provided with large tri-dimensional ventilation, fresh air circulation, large capacity air condition without fluorine
○ The operator’s cab with the wide vision field and the streamlined appearance, matching the decoration and function with human nature, and offering the working environment in a car.
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Main Technology Data of Hydraulic Excavator NK450
No.
|
Item
|
Unit
|
Date
|
Face shovel
|
Backhoe
|
1
|
Machine weight
|
t
|
46
|
45
|
2
|
Bucket capacity
|
Standard
|
m 3
|
2.5
|
2.0
|
Range
|
m 3
|
2.0~2.5
|
1.0~2.5
|
3
|
Diesel engine
|
Model
|
|
M11-C290
|
Power /Speed
|
kW/rpm
|
216/2100
|
Fuel tank Capacity
|
L
|
420
|
4
|
Hydraulic system
|
Type
|
|
variable system controlled by Crossing power with two pumps and two circuits
|
Max. pressure of main oil circuit
|
MPa
|
29.4
|
Max. flow of main oil circuit
|
L/min
|
2×320
|
Operating style
|
|
Pilot control
|
Hydraulic oil tank capacity
|
L
|
425
|
5
|
Performance
|
Swing speed
|
r/min
|
9.0
|
Travel speed
|
km/h
|
3.0/5.0
|
Max. pulling force
|
kN
|
321
|
Gradeability
|
%
|
70
|
Ground pressure
|
MPa
|
0.077
|
Circulating time of operation
|
s
|
16~19
|
6
|
Working date
|
Boom length
|
mm
|
3950
|
6400
|
Stick length
|
mm
|
2600
|
2800
|
Max. digging radius
|
mm
|
8260
|
11315
|
Max. digging depth
|
mm
|
2440
|
7098
|
Max. digging height
|
mm
|
9240
|
9204
|
Max. unloading height
|
mm
|
6630
|
5944
|
Max. digging force of stick
|
kN
|
243
|
175
|
Max. breakout force of bucket
|
kN
|
230
|
186
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Main Components of Hydraulic Excavator NK450
No.
|
Component
|
Type
|
Manufacturer
|
1
|
Diesel engine
|
M11-C290
|
Cummins/ America
|
2
|
Main pump
|
A11VLO190
|
Rexroth /Germany
|
3
|
Main Valve
|
M8
|
Rexroth /Germany
|
4
|
Double join valves
|
2MO
|
Rexroth /Germany
|
5
|
Swing motor
|
A2FE125
|
Rexroth /Germany
|
6
|
Swing reduction gear
|
GFB60T2
|
Rexroth /Germany
|
7
|
Travel motor
|
A6VE107
|
Rexroth /Germany
|
8
|
Travel reduction gear
|
GFT80T3
|
Rexroth /Germany
|
9
|
Logical Valve
|
026710
|
Rexroth /Germany
|
10
|
Isolating Valve
|
MH3WA
|
Rexroth /Germany
|
11
|
Foot pedal pilot valve
|
4TH6N
|
Rexroth /Germany
|
12
|
Armrest pilot valve
|
4TH6E
|
Rexroth /Germany
|
13
|
Electromagnetism Valve
|
4WE6C
|
Rexroth /Germany
|
14
|
Hydraulic hose + System seal
|
|
Manuli/Italy
|
15
|
Cylinder seal
|
|
Trelleborg
|
16
|
Driver’s seat
|
|
Grammer
|
17
|
Air-condition system
|
|
Wuhan Jindong /China
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