Caterpillar 320D Excavator Faults And Troubleshooting Methods

The Caterpillar 320D excavator is a hydraulic excavator of medium size, primarily created to offer users improved and more affordable excavators. The engine of the Caterpillar 320D excavator is stronger and less affected by low-quality fuel than other excavators of similar type. The 320D excavator consumes less fuel. The 320D excavator can perform effectively in all work settings. MyMROmarts is a professional aftermarket CAT Caterpillar parts supplier. In this article, MyMROmarts will present various issues with the Caterpillar 320D excavator and ways to troubleshoot them.

 

1. The 320D Excavator Lacks Power

A common occurrence is the loss of power in excavators. Initially, it is imperative to verify if all actuators are without power. Use the control handle and listen for any noise indicating engine refueling. If not, it could be because of the following explanations:

The engine is not starting or experiencing a malfunction, requiring a check of its operation.

Air is present in the hydraulic system and requires venting.

The suction filter might be blocked and requires replacement.

The oil outlet pipe of the pump might be blocked and requires cleaning.

The pilot pressure is too low, so the pilot pressure control valve should be inspected and calibrated.

The main safety valve is experiencing abnormal pressure and requires adjustment or replacement.

 

If the only issue is with the running gear being weak, it could be due to the following factors:

The pilot's oil pressure while traveling is too low and must be examined and corrected.

The mutual injection relief valve has abnormal pressure and requires adjustment or replacement.

There is a leak in the central swivel joint that requires the seal to be changed.

The mobile motor could have a leakage and require fixing or substitution.

The multi-way valve requires inspection and repair due to a malfunction.

 

2. Caterpillar 320D Excavator Experiences A Reduction In Engine Speed

There are multiple factors that can result in a decrease in engine speed. Initially, the output power of the engine itself must be tested. Below are possible factors for a decrease in engine output power from the rated power.

The fuel is of low quality and should be exchanged for appropriate fuel.

The valve clearance requires adjustment as it is not correct.

The timing of the injection is incorrect and requires adjustment.

An air intake system has a leak that requires fixing.

 

If the hydraulic pump flow rate does not align with the engine output power even when the engine output power is normal, there could be several reasons for this discrepancy:

A problem has been identified in the hydraulic pump system which requires an inspection of the electrical system, hydraulic system, and mechanical transmission system.

 

3. Deviation In The Movement Of The 320D Excavator

There are numerous factors that can lead to excavator deviation. Some typical troubleshooting techniques include:

Verify if there is any harm to the sealing ring of the central rotary joint. If the sealing ring is damaged, replace it.

Service the balance valve, oil lines, and hydraulic oil filter by cleaning and replacing them.

Inspect the safety valve of the travel motor for any signs of oil leaking. Replace the oil if there is a leak.

Maintain oil flow by cleaning the balance valve's minor orifice in the final drive system.

Verify the traveling proportional valve's output pressure. If it is not enough, it must be changed or substituted.

 

The faults mentioned above are only a few common ones and the associated troubleshooting methods. The current circumstances can differ based on the environment and conditions in which the equipment is used. Regular care and maintenance are essential to decrease the frequency of malfunctions. While using the excavator, ensure the use of proper hydraulic oil and regularly change the hydraulic oil and filter to maintain the hydraulic system's functionality and lengthen the excavator's lifespan.