Why is the excavator not operating
As an important equipment in construction machinery, excavators will seriously affect the construction progress once they fail. This article combines popular topics and hot contents on the entire network for the past 10 days to sort out common reasons and solutions for the excavator not moving, and presents them with structured data to help users quickly locate problems.
1. Hydraulic system failure
The hydraulic system is the core of the excavator operation, and the following are common fault points:
| Cause of failure | Performance characteristics | Solution |
|---|---|---|
| Insufficient hydraulic oil | Oil level is below the standard line, weak or stagnant | Supplement the same model of hydraulic oil to the specified range |
| Damage to hydraulic pump | Anomaly noise, pressure gauge displays zero | Replace hydraulic pump or repair seals |
| Oil blockage | Local action failure, oil temperature rises | Clean the filter element and replace the hydraulic oil |
2. Electrical control system problems
Electrical failures may cause signal transmission interruption:
| Cause of failure | Detection method | Handling measures |
|---|---|---|
| Fuse blown | Use a multimeter to measure the circuit on and off | Replace the fuse of the same specification |
| Controller failure | Diagnostic device reads error code | Reset or replace the ECU module |
| Sensor failure | Compare the normal value range | Clean or replace sensors |
3. Mechanical transmission components are stuck
Mechanical structure issues need to be checked:
| Part Name | Typical Symptoms | Repair advice |
|---|---|---|
| Sliding motor | Unable to rotate or there is a strange noise | Add grease or replace bearings |
| Walking speed reducer | One-sided walking powerlessly | Check gear wear |
| Cylinder seal | Hydraulic oil leakage | Replace the seal ring |
4. Improper operation or secure lock
Non-technical reasons cannot be ignored:
| Situation description | Key points for troubleshooting | Solution |
|---|---|---|
| The security lock has not been released | Check the cab locking lever | Put down the safety locking device |
| Error in operation mode | Confirm the working mode selection | Switch to the correct mode |
| Overload protection trigger | Dashboard alarm prompt | Restart after shutdown and cool down |
5. References to recent hot cases (next 10 days)
| Source of the event | Fault phenomenon | Final diagnosis |
|---|---|---|
| A short video leaked at a construction site | All the excavators suddenly failed | The solenoid coil of the main control valve burns out |
| Repair forum help post | The cooler is normal and the heater is not active | Hydraulic oil deteriorates at high temperature |
| Manufacturer Technical Notice | New machine walking sideways | Factory hydraulic pipeline connection |
Summary suggestions:
When the excavator has no movement failure, it is recommended to follow"Electrical first, then hydraulic first, simple first, then complex"Gradually investigate the principles:
1. Check the dashboard alarm information and safety lock status
2. Test whether a single action is responsive
3. Measure hydraulic system pressure value
4. Use diagnostic equipment to read fault codes
5. Contact professional maintenance personnel to deal with complex mechanical failures
Regular maintenance can prevent 80% of failures. It is recommended to replace the hydraulic oil filter element every 500 working hours and comprehensively check the sealing of the hydraulic system every 2,000 hours.
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