Sunday, June 26, 2016

Wind generator repair

The crane is back. My grandson, Gus would love it! It has been 11 years since I put the Enertech 1800 up. Thanks Mick Sigrillo. Now because of a crack in the mounting plate I brought it down.

Working on the top of a 50 foot tower is... lets say exciting. When you have to let go and use both hands on something putting all your trust in a thin strap of nylon and a couple of clips!

The the wind was low (about 5 mph) and since there is no good way to lock the yaw of the head I was at the mercy of the wind to hook the crane to the generator lifting eye screw. Finally I made the hook and removed the nuts so the head could be lifted. Unfortunately as luck would have it the balance was off and the mounting plate jammed on the bolt threads. With nothing to lever with or against I decided to screw the nuts below the mounting plate up and raise the head to the top of the three bolts. Problem solved.

For years I have had a family of birds nesting in the nacel. Each year I would evict them and each year they would come back. Looks like this year they really did a number on some of the wiring. One of my repairs will be to bird proof the unit!

OK. Now now a new project. Let the learning begin.

Monday, June 20, 2016

Yeks! This is trouble...

Last January I hear this strange clicking noise outside and wondered if it could be my wind generator. Shutting off the generator stopped the clicking noise. Not wanting to test fate I shut it off until warmer weather. When I climbed up to have a look this is what I saw. Yeks! A crack in the mounting plate. Had this broken off I would not need a crane to take it down for repair. Gravity would have done the job for me.

My guess is that the designers got it wrong when they drilled that 1" hole in the plate for the power cord. This weakened this section and after many years of flexing caused a metal fatigue crack. My repair will be to make another plate and weld it to the existing one. I will make some other arrangement for securing the power cord in place. More pictures to follow when I get the crane in and take the unite down.

In my last post I had just repaired my SDHW system and replaced the anti-freeze in the hot loop. Then it was time to replace the pipe insulation on the roof lines. I had good weather and everything was going just fine. I should have known.

As I removed the insulation around one of the high point vents I noticed some corrosion. 

Upon removal and close examination I realized that when they say that the anti freeze should not be used with galvanized fittings they mean it. In this picture you can see the brass fitting below the other vent is just fine. So I had to drain off some of the loop, replace the fitting and then refill and vent the system. Oh well live and learn it guess.