Understanding the Causes and Solutions for Slow Excavator Operations: A Comprehensive Guide

Do you often encounter a lack of power in excavators? Today, let’s analyze and address the issue of slow excavator operations.

Slow Component Movement
When a single action is performed slowly, including walking, lifting arms, turning, and excavator bucket rotation, the problem can usually be traced to three areas:

1. Component Failure
Failure in the action components themselves, such as poor information reception, poor contact during operation, or low overflow valve pressure in related components. Operators can tap the component to check for loose screws or conduct pressure tests for repair and maintenance.

2. Transmission Process Failure
Failure in the command transmission process that impedes the transfer of command signals. Focus should be on inspecting the pump, low-pressure sensors, and multi-way valves for faults.

3. Control Center Failure
Failure in the excavator’s command issuing center, preventing signal transmission. This situation is generally more complex and requires professional repair guidance. Operators should carefully check for electromagnetic valve faults, such as a stuck spool.

Slow Movement of the Entire Excavator
1. Hydraulic System
The hydraulic system is one of the power systems of the excavator. If the entire machine is slow, check whether the hydraulic system is maintained regularly and if the hydraulic oil is changed on schedule. Expired hydraulic oil not only affects performance but can also corrode the hydraulic walls. Also, inspect for any blockages in the hydraulic oil circuit and return oil filter elements. In case of blockage, clean the oil circuit or replace parts if necessary.

2. Low Engine Power
Like the hydraulic system, the engine is also a power system of the excavator. Low engine power leads to reduced output and slows down the excavator.

3. Hydraulic Pump
Insufficient hydraulic pump output, a transmission fault in the hydraulic system. Operators can use the service diagnostic system for relevant pressure tests to see if the slow excavator action is caused by the hydraulic pump transmission.

Slow Movement in a Warm Engine
1. Check the Fuel
Ensure that the fuel used meets the excavator’s requirements. If the fuel is too old or dirty, it needs to be replaced. Additionally, if there are copper filings on the fuel filter screen, it can scratch and wear out the main pump, necessitating the cleaning of the filter screen.

2. Filter Blockage
A blocked filter impedes oil flow. Check if the pilot filter, return oil filter, and suction filter are blocked. If they are, clear the blockage or replace the filter if it’s severe.

3. Main Pump Conditioner
Mud on the pistons of the main pump conditioner. Excavators often work in contact with soil, which can easily lead to piston blockage, reducing pump pressure and output power, thus slowing down the excavator’s movements.

Explore our in-depth guide to diagnosing and solving slow excavator operations. Learn about common issues in component movement, hydraulic systems, engine power, and more, with practical solutions to keep your excavator running smoothly.



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