1.Message Display List

[6]Troubleshooting for reduction gear

Trouble Description Possible Cause

No rotation. Malfunction has occurred with equipment other than the piston motor and the reduction gear.

Abnormal noise comes from the reduction gear during running. Malfunction has occurred with the motor except the reduction gear.

A load that exceeds the motor output torque is working on the motor.

The angular bearing of the reduction gear is damaged and does not rotate.

The gear in the reduction gear is damaged and does not rotate.

The bearing in the reduction gear is damaged and does not rotate.

The spline in the reduction gear is damaged and does not rotate.

The gear in the reduction gear is damaged.

The bearing in the reduction gear is damaged.

The sliding section of the reduction gear has worn and interference has occurred among the parts.

The attachment section of the reduction gear is abnormally hot. The reduction gear lubricating oil is not enough.

The reduction gear lubricating oil is too much.

The bearing in the reduction gear is damaged.

Wrong selection of a thrust plate causes abnormal thrust load in the reduction gear. Countermeasure and Solution

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.

See the above-mentioned troubleshooting 1 through 5.

Check the load working on the motor and remove it.

Replace the reduction gear. Check whether too much external load is working on it. If so, remove the load.

Replace the reduction gear.

Replace the reduction gear.

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.

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.

Adjust the amount of the lubricating oil to the specified amount.

Replace 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.

Trouble Description

There is oil leaking. Possible Cause Countermeasure and Solution

A loosened tightening bolt on the reduction gear cover causes oil leak. Remove the cover to apply liquid packing again and then tighten the cover to the specified torque. Feed the specified amount of lubricating oil.

A loosened plug of the feed, drain, or oil check port on the reduction gear cover causes oil leak.

A deteriorated O-ring of the feed, drain, or oil check port on the reduction gear cover causes oil leak. Retighten the plug to the specified torque. After that, feed the specified amount of lubricating oil.

Replace the O-ring of the plug. After that, retighten the plug to the specified torque and feed the specified amount of lubricating oil.

cracks on the housing causes oil leak. Replace the reduction gear.

Foreign matter gotten into the sliding surface of the floating seal causes oil leaking.

Corrosion on the sliding surface of the floating seal causes oil leak.

A deteriorated or damaged O-ring of the floating seal causes oil leaking. A cracked seal collar of the floating seal causes oil leak. Disassemble the unit to remove the foreign matter from the floating seal and re-assemble it.

Disassemble the reduction gear to replace the floating seal.