Troubleshooting Abnormal Excavator Vibration: 5 Reasons and Effective Solutions

Abnormal vibrations in excavators are a common concern among operators, affecting both comfort and the machinery's longevity. Prolonged vibrations can lead to premature fatigue and wear on parts, resulting in unnecessary losses. In this blog, we will explore the primary reasons behind abnormal excavator vibrations and provide practical solutions to address them effectively.

 

1. Engine Vibration:

The excavator's engine is a major source of vibration. To minimize its impact, a flexible connection is employed between the engine and the body, reducing vibration transmission. However, loose fixing screws or damaged buffer blocks can lead to severe engine shake during operation, causing abnormal vibration throughout the excavator.

Solution: Tighten fixing screws or replace worn buffer blocks.

 

2. Slewing Mechanism Vibration:

Abnormal vibrations during rotation and a "cracking" sound indicate issues with the rotating mechanism. The excavator's slewing mechanism, comprising planetary gear sets, may experience abnormal meshing due to impurities or excessive wear, leading to poor gear set operation and abnormal upper body vibration during rotation.

Solution: Inspect and clean the planetary gear set for impurities. Replace damaged gears promptly.

 

3. Boom Vibration:

Abnormal vibration during boom lifting or lowering, accompanied by a jerky movement, is typically linked to hydraulic system problems. Worn one-way valves in the boom hydraulic cylinder or impurities in the hydraulic oil disrupt proper spool switching and hydraulic flow, leading to stuck hydraulic cylinder operation and boom vibration.

Solution: Check and clean the one-way valve of the hydraulic cylinder. Replace excessively worn valves.

 

4. Cab Vibration:

Cab vibration is prominently perceived by operators. Loose screws connecting the cab and the body amplify cab vibrations, especially at higher engine speeds due to resonance principles.

Solution: Check and tighten the fixing screws of the cab base.

 

5. Hydraulic PumpVibration:

Hydraulic main pump vibrations can cause overall machine abnormality. Incoherent oil flow within the pump, cavitation due to oil-air mix, excessive impurities like iron filings, or worn plungers can lead to pump body vibrations. Additionally, blocked oil supply lines disrupt smooth oil supply to the pump body, contributing to vibration.

Solution: Check internal pump parts, replace with clean hydraulic oil, and ensure hydraulic system seals are intact.

 

Abnormal vibrations in excavators can be disruptive and damaging. Identifying the root causes and employing appropriate solutions are essential to maintaining smooth operation and extending the machine's lifespan. Regular maintenance, thorough inspections, and prompt repairs will ensure that your excavator performs optimally and delivers exceptional results on the job site.

 

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