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

26/Jun2021

Analyze The Slewing Device Of Hitachi Excavators-slewing Buffer Valve, Slewin...

1. Hitachi excavator rotary buffer valve When the swing control lever is pulled to the neutral position to stop the operation, the oil return line of the swing motor is blocked, and the oil pressur...

26/Jun2021

Hitachi EX200-5 Excavator Engine Speed Does Not Change

Trouble phenomenon: The wires between the main controller (MC), EC motor, and engine controller are faulty. Even if the engine controller rotates, the engine speed does not change. Fault diagnosis ...

25/Jun2021

Daily Maintenance Items For Hitachi Excavators

(1) Check, clean and replace the air filter element: first blow from the inner side of the filter element along the crease with dry compressed air with a pressure of less than 700kPa, then blow alo...

25/Jun2021

Hitachi ZX470LCR-3 Excavator Hydraulic Pump And Engine Joint Control System

Common sense article: Hitachi ZX470LCR-3 excavator hydraulic pump and engine joint control system Through the joint control of Hitachi excavator hydraulic pump and engine, a high level of power and...

25/Jun2021

Explanation Of The Control System Of Hitachi Excavator Hydraulic Pump Controller

The control function of Hitachi excavator hydraulic pump controller. According to the stroke of the joystick, the displacement of the pump is controlled to reduce the neutral loss and fine control ...

25/Jun2021

Diagnosis And Troubleshooting Of Excessive Slippage Of Hydraulic Cylinder Of ...

1. Failure phenomenon Due to the failure of the pilot control valve, main operation valve spool, anti-slip valve, overload supplement valve, hydraulic cylinder oil seal, etc., the boom, stick and b...

25/Jun2021

The Working Principle Of Sumitomo Excavator Regulator

1. Flow control The oil discharge of the pump can be arbitrarily controlled according to the pilot pressure P (1) Flow reduction After the pilot pressure P increases, the pilot piston moves to the ...

25/Jun2021

Sumitomo Excavator Reducer Structure

The reducer is a combination of two-stage simple planetary gear reducer. Its components are driving gear, sun gear, retainer, and hydraulic oil flowing into the piston motor. The shaft of the pisto...

25/Jun2021

Sumitomo Excavator Piston Motor Structure

Nine pistons are installed on the cylinder body, the end surface of the cylinder body is in contact with the valve plate, and two cylindrical oil ports B and C are installed on the valve plate. The...

25/Jun2021

How To Troubleshoot The Fault Of The Loader?

When the loader is used, it will make abnormal noises for a long time. Abnormal noise may come from the following three aspects: one is the abnormal noise produced when the drive shaft is telescopi...

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Knowledge

Analyze The Slewing Device Of Hitachi Excavators-slewing Buffer Valve, Slewin...

Hitachi EX200-5 Excavator Engine Speed Does Not Change

Daily Maintenance Items For Hitachi Excavators

Hitachi ZX470LCR-3 Excavator Hydraulic Pump And Engine Joint Control System

Explanation Of The Control System Of Hitachi Excavator Hydraulic Pump Controller

Diagnosis And Troubleshooting Of Excessive Slippage Of Hydraulic Cylinder Of ...

The Working Principle Of Sumitomo Excavator Regulator

Sumitomo Excavator Reducer Structure

Sumitomo Excavator Piston Motor Structure

How To Troubleshoot The Fault Of The Loader?