Industry Background Introduction
Excavators are one of the most common construction equipment in the engineering machinery industry, and are used in infrastructure, road engineering, mining, water conservancy and hydropower, municipal construction and other fields. The core power source of its operation comes from the hydraulic system. The hydraulic pump, hydraulic motor, multi-way valve, hydraulic cylinder and other components work together to complete complex excavation, lifting, walking and rotation actions.
Analysis Of Common Problems Of Customer Systems
Although modern excavators generally use high-performance hydraulic systems, due to long-term operation, high-load conditions and harsh construction environments, hydraulic systems often face the following problems
Decreased Efficiency Of Hydraulic Pumps
Problem manifestation:
Slow excavation and arm lifting, weak equipment output
Root cause:
Serious wear of the internal matching of the variable piston pump, reduced volumetric efficiency
Leakage Or Instability Of Hydraulic Motors
Problem manifestation:
Equipment slips, vibrates or delays in response during rotation or walking
Root cause:
Aging of motor seals, increased internal leakage, and fatigue damage of parts
Multi-Way Valve Failure
Problem manifestation:
Uncoordinated action, valve core stuck, and poor operating feel
Root cause:
System contaminants enter the valve body, electromagnetic reversing is insensitive or sludge accumulates
Hydraulic Oil Temperature Is Too High
Problem manifestation:
System temperature rises sharply after continuous operation, affecting operation continuity
Root cause:
Unreasonable system oil return design or insufficient radiator efficiency
Inaccurate Control
Problem manifestation:
Delayed operation response, excessive or discontinuous action
Root cause:
Old variable control or pilot system, slow response speed
Hydraulic System Optimization Solution
In order to ensure the continuous and efficient operation of the excavator under complex working conditions, we recommend that
customers optimize and upgrade the system from the following key components
- Replace High-Efficiency Variable Piston Pump
- Upgrade High-Torque Hydraulic Motor
- Replace The Multi-Way Control Valve With Strong Reliability
- Optimize Hydraulic Oil Circuit And Cooling System
- Add Pilot Control System Or Electronic Control Unit
Replace High-Efficiency Variable Piston Pump
Recommended products: Poocca PVM series, Rexroth A4VG, Kawasaki K3V/K5V/K7V
Features: high-pressure output, fast response speed, long life
Advantages: meet the coordinated control of complex actions and support load-sensitive system design
Upgrade High-Torque Hydraulic Motor
Recommended products: Rexroth A6VM / Hägglunds CA / Danfoss OMS series
Features: impact resistance, high torque output, stable efficiency
Application location: swing motor, travel motor, improve the climbing and swing control capabilities of the whole machine
Replace The Multi-Way Control Valve With Strong Reliability
Recommended products: Parker P70 series, Vickers DG4V, Poocca multi-way reversing valve
Features: modular design, proportional electronic control, sensitive response
Advantages: synchronous action, improved control accuracy, and adaptable to electronic control system transformation
Optimize Hydraulic Oil Circuit And Cooling System
Suggested measures:
Add return oil cooling circuit
Use high-performance radiator and cooling fan
Use special engineering machinery hydraulic oil (anti-wear, anti-oxidation, strong low-temperature starting performance
Add Pilot Control System Or Electronic Control Unit
Goal: Improve the operating feel and accuracy, and meet the needs of multiple actions at the same time
Technical direction: proportional solenoid valve + load-sensitive pump + flow distribution control (LUDV system)
Recommended Spare Parts And Supporting Services
| Category | Recommended model | Applicable brand | Application area |
|
Piston pump |
A4VG125,K5V140,PVM063 |
Rexroth, Kawasaki,Poocca |
Main pump system |
|
Travel motor |
A6VM107,Hegglund CA100 |
Rexroth |
Crawler drive |
|
Swing motor |
MS11,A2FE90 |
Poclain, Rexroth |
Slewing system |
|
Control valve |
DG4V-3,P70CF |
Vickers ,parker |
Multi-channel control |
Poocca Hydraulic Manufacturer - Your Engineering Machinery Hydraulic Partner
Poocca has rich experience in engineering machinery hydraulic system services, providing one-stop hydraulic pump, motor, valve system and other solutions, supporting OEM customization and technical support. We promise a 12-month warranty for all products, spare parts are available in stock, and shipped worldwide.
Welcome to contact us for more industry application cases and quotations:
