Appendix H-2 Maintenance Schedule
NOTICE: Use of the material contained in this document is subject to the warning on page Iv and the disclaimer on page v of this
document.
DOC012R02 AOC 15/50 User Manual Nov 2001
158
Scheduled Routine Maintenance for the AOC 15/50
Monthly (ground level inspection):
• Visually inspect the wind turbine and site for obvious problems.
• Record the meter and run time readings.
• Inspect the dynamic brake components for discoloration or failure.
Six months after turbine installation:
• Visually inspect the tower fasteners and carry out a random torque check.
• Check and clean the electrical connections.
• Check the blade bolt washer alignment and all accessible fasteners, especially the tower top bolts, blade
bolts and yaw bearing bolts.
• Inspect the yaw bearing and yaw lock.
• Inspect the tip brakes.
• Check the torque of the hinge block nuts and the tip brake plate fasteners.
• Inspect the generator.
• Inspect the gearbox for leaks and vent clogging.
• Check the oil level in the site glass.
• Inspect the main shaft for cracking.
• Inspect the rotary transformer.
Annually
• Check oil level in the site glass.
• Grease the yaw bearing and yaw lock.
• Clean the blades.
Every two years (or after severe events):
• As for the inspection carried out after the first six months of operation
• Clean the blades.
• Re-calibrate the control system if necessary.
• Inspect and replace the anemometers if necessary.
• Inspect all exposed cables
Every five years:
• As for the inspection carried out every two years.
• Overhaul the wind turbine generator if the oil samples and/or inspection records indicate this to be
necessary.