Troubleshooting Guide
Fault
Causes
Solutions
Abnormal Gearbox Vibration
1 - Loose mounting bolts
2 - Loose or damaged input connections
3 - Damaged key, keyway, or improper key fit
4 - Presence of foreign particles inside the gearbox
5 - Damaged or worn bearings
6 - Damaged or worn gears
2 - Loose or damaged input connections
3 - Damaged key, keyway, or improper key fit
4 - Presence of foreign particles inside the gearbox
5 - Damaged or worn bearings
6 - Damaged or worn gears
1 - Tighten all mounting bolts securely.
2 - Tighten the input connections or replace them if necessary.
3 - Replace the key. The key must be completely free of play and properly fitted. Use a standard key. If the keyway is damaged or enlarged, it must be repaired or replaced.
4 - Drain the lubricant, thoroughly clean the gearbox housing, and refill it with fresh oil.
5 - Replace the bearings.
6 - Replace the gears.
2 - Tighten the input connections or replace them if necessary.
3 - Replace the key. The key must be completely free of play and properly fitted. Use a standard key. If the keyway is damaged or enlarged, it must be repaired or replaced.
4 - Drain the lubricant, thoroughly clean the gearbox housing, and refill it with fresh oil.
5 - Replace the bearings.
6 - Replace the gears.
Oil Leakage
1 - Incorrect installation position:
○ Unsuitable location of plugs for the selected mounting position.
○ Improper gearbox mounting orientation.
2 - Loose oil plugs.
3 - Excessive oil level.
4 - Damaged oil plugs.
5 - Damaged or worn oil seals.
6 - Damaged washers / gaskets.
○ Unsuitable location of plugs for the selected mounting position.
○ Improper gearbox mounting orientation.
2 - Loose oil plugs.
3 - Excessive oil level.
4 - Damaged oil plugs.
5 - Damaged or worn oil seals.
6 - Damaged washers / gaskets.
1 - Check the position of the oil plugs and correct them if necessary.
2 - Tighten the oil plugs securely.
3 - Reduce the oil level; the gearbox housing should be filled approximately up to half of its internal volume.
4 - Replace the oil plugs.
5 - Replace the oil seals.
6 - Replace the washers / gaskets.
2 - Tighten the oil plugs securely.
3 - Reduce the oil level; the gearbox housing should be filled approximately up to half of its internal volume.
4 - Replace the oil plugs.
5 - Replace the oil seals.
6 - Replace the washers / gaskets.
Excessive Gearbox Temperature
1 - Excessive load (the service factor has not been correctly considered, power/torque calculations are incorrect, or machine components are under excessive stress).
2 - Insufficient or excessive amount of lubricant.
3 - An unsuitable lubricant has been used.
4 - High ambient temperature.
2 - Insufficient or excessive amount of lubricant.
3 - An unsuitable lubricant has been used.
4 - High ambient temperature.
1 - Check the service factor according to the catalog. Ensure that the machine components move freely. If necessary, replace the gearbox with a larger one.
2 - Adjust the oil level.
3 - Use the appropriate lubricant specified in the catalog.
4 - Use a lubricant suitable for higher temperatures; if necessary, replace the gearbox with a larger one.
2 - Adjust the oil level.
3 - Use the appropriate lubricant specified in the catalog.
4 - Use a lubricant suitable for higher temperatures; if necessary, replace the gearbox with a larger one.
High temperature at the bearings location
1 - Excessive radial load
2 - Insufficient lubricant
2 - Insufficient lubricant
1 - Reduce the radial load on the gearbox, use appropriate bearing support in the opposite direction, and if necessary, replace with a larger gearbox.
2 - Adjust the oil level.
2 - Adjust the oil level.
Gearbox noise
1 - Insufficient lubricant
2 - Key or keyway issues at input or output
3 - Problems in the machine system (transmission of noise to the gearbox)
5 - Damaged coupling and input/output connections
6 - Loose mounting bolts
7 - Uneven or unlevel gearbox installation surface
8 - Bearing failure
9 - Gear damage
10 - High ambient temperature
2 - Key or keyway issues at input or output
3 - Problems in the machine system (transmission of noise to the gearbox)
5 - Damaged coupling and input/output connections
6 - Loose mounting bolts
7 - Uneven or unlevel gearbox installation surface
8 - Bearing failure
9 - Gear damage
10 - High ambient temperature
1 - Adjust the oil level
2 - Replace the key; the key must fit perfectly without any play
3 - Inspect the connections, bearings, rails and guides, housing, and other machine components to ensure they are secure and operate smoothly
4 - Drain the oil and refill the gearbox after cleaning the housing
5 - Replace the key; it must fit perfectly without any play. Use a standard key. If the keyway is damaged or enlarged, it must be replaced
6 - Tighten the mounting bolts
7 - Ensure the installation surface is level. Use supports or shims if necessary
8 - Replace the bearings
9 - Replace the gears
10 - Use appropriate oil (higher viscosity oil for high-temperature operation)
2 - Replace the key; the key must fit perfectly without any play
3 - Inspect the connections, bearings, rails and guides, housing, and other machine components to ensure they are secure and operate smoothly
4 - Drain the oil and refill the gearbox after cleaning the housing
5 - Replace the key; it must fit perfectly without any play. Use a standard key. If the keyway is damaged or enlarged, it must be replaced
6 - Tighten the mounting bolts
7 - Ensure the installation surface is level. Use supports or shims if necessary
8 - Replace the bearings
9 - Replace the gears
10 - Use appropriate oil (higher viscosity oil for high-temperature operation)