5-2 Lower Mechanism: Travel Drive Unit [6] Troubleshooting for reduction gear Trouble Description No rotation.
Possible Cause
Countermeasure and Solution
Malfunction has occurred with equipment other than the piston motor and the reduction gear.
Check whether pressure has reached to the intake side of the motor and then inspect and repair the motor by identifying the causes of problems and countermeasures for it for each piece of equipment.
Malfunction has occurred with the motor except the reduction gear.
See the above-mentioned troubleshooting 1 through 5.
A load that exceeds the motor output torque is working on the motor.
Check the load working on the motor and remove it.
The angular bearing of the reduction gear is damaged and does not rotate.
Replace the reduction gear. Check whether too much external load is working on it. If so, remove the load.
The gear in the reduction gear is damaged and does not rotate.
Replace the reduction gear.
The bearing in the reduction gear is damaged and does not rotate. The spline in the reduction gear is damaged and does not rotate. Abnormal noise comes from the reduction gear during running.
The attachment section of the reduction gear is abnormally hot.
The gear in the reduction gear is damaged.
Replace the reduction gear.
The bearing in the reduction gear is damaged. The sliding section of the reduction gear has worn and interference has occurred among the parts.
Disassemble the unit to check the damage. If damaged, replace the reduction gear. If it is not damaged, replace the worn parts. Clean the reduction gear and reassemble it.
The reduction gear lubricating oil is not enough.
Check whether there is any oil leak point. Disassemble the reduction gear to check internal damage. If damaged, replace the reduction gear. Feed the specified amount of lubricating oil.
The reduction gear lubricating oil is too much.
Adjust the amount of the lubricating oil to the specified amount.
The bearing in the reduction gear is damaged.
Replace the reduction gear.
Wrong selection of a thrust plate causes abnormal thrust load in the reduction gear.
Disassemble the reduction gear to check internal damage. If damaged, replace the reduction gear. If not damaged, replace the thrust plate with one with appropriate thickness.
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