Main technical characteristic of hydraulic excavator 750-7
○ Cummins diesel engine, water cooled, direct injection, turbo-charged and after cooled, electric control, it satisfies the emission requirement of Europe standard, grade Ⅱ - Ⅲ
○ Control of constant power of single pump, limited power of three pumps for reasonable distribution of engine 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 lubrication two pumps of system by control of micro-electronics to save daily lubrication
○ Better reliability with Parker hose &seals and Busak+Shamban cylinder seals
○ The Technique with disassembled undercarriage which is advanced to transport the machine quickly
○ LCD displayer, electronic monitoring & alarm, trouble record system
○ Cab with fixed elevation and integrated 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.
Main Technology Data of Hydraulic Excavator 750-7
No. |
Item |
Unit |
Date |
Face shovel |
Backhoe |
1 |
Machine weight |
t |
75 |
73 |
2 |
Bucket capacity |
Standard |
m 3 |
4.5 |
3.5 |
Range |
m 3 |
4.0~5.5 |
2.3~5.0 |
3 |
Diesel engine |
Model |
|
QSM11-C400 |
Power /Speed |
kW/rpm |
298/1800 |
Fuel tank Capacity |
L |
820 |
4 |
Hydraulic system |
Type |
|
Three pumps and three loops, limit load variable system |
Max. pressure of main oil circuit |
MPa |
32 |
Max. flow of main oil circuit |
L/min |
2×415 |
Swing type |
|
Independence open type |
Flow of swing oil |
|
1×415 |
Operating style |
|
Pilot control |
Hydraulic oil tank capacity |
L |
780 |
5 |
Performance |
Swing speed |
r/min |
6.0 |
Travel speed |
km/h |
3.18 |
Max. pulling force |
KN |
457 |
Gradeability |
% |
70 |
Ground pressure |
MPa |
0.098 |
Circulating time of operation |
s |
20 |
6 |
Working date |
Boom length |
mm |
4450 |
7100 |
Stick length |
mm |
2900 |
3000 |
Max. digging radius |
mm |
9262 |
12173 |
Max. digging depth |
mm |
2659 |
7585 |
Max. digging height |
mm |
10701 |
10560 |
Max. unloading height |
mm |
7585 |
7099 |
Max. digging force of stick |
KN |
333 |
242 |
Max. breakout force of bucket |
KN |
370 |
320 |
