Inspection and repair on FLENDER PEAK 4280 gearbox

This client from The Netherlands came to us with this FLENDER PEAK 4280. We inspected the gearbox and performed a repair. After a succesful testrun we shipped the gearbox back to the client.

We got invited to do an inspection on a leaking gearbox in a wind turbine.

In case that the leakage is still not solved, it may take some time for the chamber on the hub side to be filled with oil again. It is therefore recommended to:

- Check the wind turbine for oil leakage again after a couple of days / after a week
- Keep inspecting the wind turbine for oil leakage for some time
If no leakage is observed after this period then the problem is solved. It has also been noted that the pitch pipe is not in line with the hollow shaft through the gearbox, it seems to be rubbing on the bottom of the hollow shaft (see appendix A, pictures 4 and 5). The pitch cilinder was also not in line with the pitch pipe. It is therefore also recommended to:

- Check and adjust the alignment of the pitch pipe through the hollow shaft
- Check and adjust the alignment of the pitch cilinder to the pitch pipe