5 signs your WTG yaw sliding pads need replacing

Yaw sliding pads support the nacelle on the yaw ring and let it turn smoothly into the wind. They wear gradually, and catching the wear early avoids damage to the yaw ring itself.

1. Noise while yawing

Groaning, squealing or "stick-slip" noise during yaw movement is one of the first signs that pads are worn or the friction surface is contaminated.

2. Vibration and jerky yaw movement

If the nacelle moves in steps instead of smoothly, or you feel vibration in the tower during yaw, check pad condition and preload.

3. Yaw errors and higher motor load

Frequent yaw-related alarms, slower alignment with the wind, or higher yaw-motor current can all point to increased friction from worn pads.

4. Pad thickness below the limit

Measure pad thickness at every PM. Once it reaches the manufacturer's minimum, plan replacement – running below the limit risks metal-to-metal contact.

5. Powder or debris around the yaw ring

Fine pad material, metal particles or grease contamination around the yaw ring and brake area means it is time for an inspection.

Planning a replacement

• Replace pads as a complete set (top, bottom and radial) so the load is shared evenly.
• Clean the yaw ring friction surfaces carefully and inspect them for scoring.
• Check the pad holding plates and fasteners, and tighten to the specified torque.
• Use the correct pad material and chamfer for your turbine model.

We supply Inox RD93 yaw sliding pads with holding plates, and our team carries out yaw pad replacement on site. Contact us for pricing and availability.