Construction machinery repairing and maintenance knowledge for brand equipments Factory China - New - Liteng Machinery

20/Jul2021

Display Of Various Switches And Sensors (connector Disconnection) Of The Exca...

l. D/G means the display on the background, L/G means the display on the bright background. 2. The meanings of the symbols in the table are as follows: +- -5V power supply ((5+0.5)V), S-signal: gro...

20/Jul2021

Understand The Walking Operation Of Hitachi Excavators

When the oil from the travel control valve flows into the oil port BV, the oil flows around the spool 2, opens the one-way valve 3, and flows into the motor oil port BM. The return oil from the mot...

20/Jul2021

The Principle Of Hitachi Excavator Travel Brake Valve

(1) One-way valve: The function of this valve is to ensure smooth start and stop, and together with the balance valve to prevent cavitation in the walking motor circuit. (2) Pressure reducing valve...

20/Jul2021

Hitachi Excavator Travel Speed Selection Valve Principle

The variable servo piston 1 is connected with the valve plate 6 through the connecting rod 5. Therefore, when the servo piston 1 is moved, the valve plate 6 changes the inclination angle of the cyl...

18/Jul2021

Overview Of Hitachi Excavator Engine Controller (EC) And Pump Valve Controlle...

The Hitachi excavator system is controlled by two microcomputers, namely: Engine Controller (EC) and Pump Valve Controller (PVC). The engine controller and pump valve controller receive signals fro...

18/Jul2021

Structure Of Hitachi ZX470LCR-3 Excavator Crawler Adjustment Device

Hitachi excavator track adjustment device is installed on the side frame. It is composed of spring 5 and adjusting device cylinder 6. The spring 5 absorbs the load applied to the front guide wheel,...

18/Jul2021

Doosan Excavator Relief Valve Structure And Working Principle Diagram

1) The role of overflow valve The relief valve uses the imported oil pressure to balance the spring force to achieve pressure control. There are four main functions of relief valve for hydraulic ex...

18/Jul2021

The Role Of The Main Control Valve Of Doosan Excavator And The Working Proces...

(1) Function: Main control valve or multi-way valve, it is a combination valve with two or more reversing reads as the main body. According to the requirements of different systems, overflow valves...

18/Jul2021

Doosan Excavator DH60-7 Hydraulic Pump Structure And Working Principle

1) Structure understanding and the role of each component 2) Working principle of swash plate axial piston pump The cylinder block is connected with the spline on the main shaft, so that it rotates...

18/Jul2021

The Structure And Working Principle Of Doosan Excavator Slewing Motor

1. The structure of the rotary motor The structure of the rotary motor includes a housing, a cylinder, a plunger, a balance valve, a valve plate, a brake, and so on. Its function is that the slewin...

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Knowledge

Display Of Various Switches And Sensors (connector Disconnection) Of The Exca...

Understand The Walking Operation Of Hitachi Excavators

The Principle Of Hitachi Excavator Travel Brake Valve

Hitachi Excavator Travel Speed Selection Valve Principle

Overview Of Hitachi Excavator Engine Controller (EC) And Pump Valve Controlle...

Structure Of Hitachi ZX470LCR-3 Excavator Crawler Adjustment Device

Doosan Excavator Relief Valve Structure And Working Principle Diagram

The Role Of The Main Control Valve Of Doosan Excavator And The Working Proces...

Doosan Excavator DH60-7 Hydraulic Pump Structure And Working Principle

The Structure And Working Principle Of Doosan Excavator Slewing Motor