FAQ

Gear Unit Troubleshooting Guide

Malfunction	Possible Cause	Corrective Action
Excessive noise around fastening points	Loose fasteners	Tighten the bolts and nuts to the specified torque. Replace any damaged bolts or nuts.
Changes in operating noise	Damaged gear teeth	Contact the after-sales service team. Inspect the teeth of all gears and replace any damaged components.
	Excessive bearing clearance	Contact the after-sales service team and adjust the bearing clearance.
	Damaged bearings	Contact the after-sales service team and replace the damaged bearings.
Abnormal gearbox noise	Oil level is too high or too low	Check the oil level at room temperature. Add or drain oil as required.
	Oil has been in service for too long	Check the date of the last oil change. Replace the oil if necessary.
	Oil pump malfunction	Check whether the oil pump is operating correctly. Repair or replace the pump if necessary.
	Bearing damage	Contact the after-sales service team. Review the available vibration measurement data. Inspect and replace the bearings as required.
Operating temperature is too high	Oil level is too high	Check the oil level and adjust it if necessary.
	Oil has been in service for too long	Check the date of the last oil change and replace the oil if necessary.
	Oil is heavily contaminated	Contact the after-sales service team and replace the oil.
	Cooling-medium flow rate is too high or too low on gear units equipped with an oil-cooling system	Adjust the inlet and outlet valves. Check that the cooling-water circuit flows freely.
	Oil flow through the water cooler is too low	Check the oil level and adjust it if necessary.
	Oil filter is severely clogged	Clean or replace the oil filter.
	Oil pump malfunction or damage	Contact the after-sales service team. Check whether the oil pump operates correctly. Repair or replace the oil pump as required.
	Air inlet of the fan guard and/or gearbox housing is heavily contaminated	Clean the fan guard and gearbox housing.
	Deposits have accumulated inside the cooling coil	Contact the after-sales service team. Clean or replace the cooling coil.
Increased vibration at the bearings	Bearing damage	Contact the after-sales service team. Inspect and replace the bearings as required.
Increased vibration at the bearings	Gear damage	Contact the after-sales service team. Inspect and replace the gears as required.
Excessive backstop temperature or failure of the backstop function	Backstop damage or malfunction	Contact the after-sales service team. Inspect and replace the backstop as required.
Oil leakage from the gear unit	Poor sealing at the housing cover or connection points	Inspect the seals and connection points. Replace damaged seals and reseal the connections if necessary.
Oil leakage from the gear unit	Radial shaft seal failure	Contact the after-sales service team and replace the radial shaft seal.
Water in the oil	Oil contains water or other contaminants	Take an oil sample and check for water contamination. Have the oil analysed by a laboratory if necessary.
	Oil cooler or cooling coil leakage	Contact the after-sales service team. Locate and repair the source of the leak. Replace the cooler or cooling coil if necessary.
	Condensation caused by cool ventilation air entering the machine room	Protect the gear unit with suitable insulation. Close the relevant air outlet or redirect the airflow away from the gear unit.

Note: If a malfunction cannot be safely identified or corrected by the customer, please contact our after-sales service team.

FAQ

Gear Unit Troubleshooting Guide

After-Sales Team Contact Information:

Customer Service Department: +86 577 6366 0008

After-Sales Service Department: +86 577 6365 5788