1. Abnormal noise and vibration

There are knocking sounds, roaring sounds and sharp hissing sounds during operation. Periodic abnormal sounds and obvious vibration of the machine body.

1、Gear issues: Tooth surface wear, pitting, broken teeth, improper assembly clearance.
2、Bearing issues: Bearing wear, cage damage, poor lubrication.
3、Assembly issues: Loose anchor bolts, misaligned couplings.
4、Foreign object intrusion: There are metal debris or impurities inside the box.

1、Stop the machine immediately, check and tighten the bolts.
2、Check the alignment of the couplings.
3、Open the box to inspect the gears and bearings, and replace the damaged parts.
4、Keep the lubricating oil clean.

2、Leakage

Oil stains or dripping oil observed at bearing end covers, housing joint surfaces, inspection windows, etc.

1、Seal failure: oil seal aged, worn, or hardened.
2、 Housing issues: damaged gasket, sand holes, or cracks in the housing.
3、Blocked vent: internal pressure buildup forcing oil out.
4、 Excessive oil level: oil splashing severely and escaping through seals.

1、Replace faulty oil seals or gaskets.
2、Clear the vent (breather valve).
3、Adjust oil level to the specified range on the dipstick.
4、Repair sand holes or cracks as needed.

3、Excessive Temperature Rise

Housing surface temperature exceeds ambient temperature by 70°C or more, feeling hot to the touch.

1、Lubrication issues: incorrect oil level, wrong oil grade, or degraded oil quality.
2、Overload: actual load exceeding rated capacity.
3、Mechanical friction: improper bearing or gear installation, severe wear increasing friction.
4、Environmental factors: high ambient temperature or poor ventilation."

1、Check oil level and quality; replace with correct lubricant.
2、Verify load is within rated limits.
3、Inspect internal components for damage.
4、Improve ventilation and clean surface debris.

4、Lubricant Degradation

Oil appears black, milky (emulsified), contains metal particles, or emits a burnt odor.

1、Normal wear: metal fines mixed into the oil.
2、Abnormal wear: severe internal component wear.
3、Water ingress: cracked water-cooling coil, high humidity, or poor sealing.
4、Oxidation: oil used beyond its service life or aged due to high temperatures.

1、.Conduct regular oil analysis to monitor oil condition and wear debris.
2、Replace lubricant thoroughly at specified intervals.
3、Identify and eliminate the source of water ingress.

5、Lubricant Degradation

Seizure, sluggish rotation, or insufficient output torque.

1、Bearing damage: bearing seized or fractured.
2、Shaft damage: worn keyway, bent or broken shaft.
3、Internal jamming: broken gear tooth or foreign object inside the housing.
4、Severe overload: resulting in structural damage.

1、Stop immediately; do not attempt to force restart.
2、Contact qualified maintenance personnel for internal inspection.
3、Replace damaged shafts, bearings, or gears as required.