Life at the end of the road

July 6, 2018

On the move :-)

Apologies in advance for any errors in grammar or  spelling cos I’m ‘on the move’ being chauffeured to ‘snecky (Inverness) for an eye appointment. So between the bumps in the road an me cloudy left eye this may go a little pear shaped.

I did set myself the goal of actually posting something yesterday but the day ended up being much longer than expected and it was a case of in, shower, bed Smile 

The plan for the day was to service my old wind turbine next door for the neighbours in me old house. It’s been on the ‘to do’ list since May but I just keep getting distracted, nothing fresh there then. The Proven/Kingspan and now SD Energy   turbine has been working away for some 13 years now with little more than routine maintenance. Sure it’s broken a few springs and worn out a couple of sets of yaw rollers but I’ve always managed to scrounge, repair or botch it without actually spending a great deal of money on it.

From a recent email :- SD Green Energy of Tokyo, Japan are pleased to announce the acquisition of the wind turbine product range from Kingspan. SD Green Energy have established a new division called SD Wind Energy Ltd and will expand its team immediately with the addition of the staff and manufacturing capabilities of the site in Stewarton, Scotland.  This will also be supported by an existing international sales team based in Asia.

 

With all this dry weather I’d have been stupid to put it off any longer for the access to it is now good and hard. Normally it’s bit boggy which means I have to use the quad and a dubious anchor point for lowering it. When conditions are ideal like this then I can use the Land Rover and winch or Calum the digger. As the ‘Old Girl’ is still away having a new galvanized chassis, bulkhead and B posts it was down to Calum the Kubota.

Servicing a Proven wind turbine

First task was to fuel up, grease up, load up then track up to the site.

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After carefully positioning the digger in line with the axis of the turbine I fitted the ‘gin pole’ to the mast in preparation for lowering.

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The Tirfor winch was then attached to the digger and the wire slack just taken up prior to removing the base bolts, one of which had snapped!!! That must have been a helluva wind to snap an M20 high tensile bolt!

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Once the base bolts are removed on a 2.5/3.2kW Proven on 6m mast it’s possible to just tip it a few degrees manually before lowering with the Tirfor. On larger versions you need to jack them up a few inches with a hydraulic jack first. Normally you would do this with the brake on but replacing the brake rope was one of the jobs that needed doing. This was in part one of the reasons for it taking me so long to getting around to doing the job, it needed a very calm day.

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The mast is lowered onto a rest, an oil drum in this case but care is needed to ensure it doesn’t slide on the tapered mast. I usually put a tyre or some soft wood between them and just keep the winch wire fairly tight. A proper steel trestle like I use for my own would be far safer but it’s not very portable Sad smile

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The ‘wee dug’ supervised as I removed the springs Smile

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It’s the furling springs and their mounting hardware that generally require the most attention on these normally very durable turbines. Over the years these have undergone many modifications and improvements. Initially only two springs were fitted, then three, then the mounting yolks were changed from pressed steel tp cast steel and the mounting bolts upgraded from M8 to M10.

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Whilst very simple in principle there are actually a lot of components so it’s important to take note of where they go. This is a version with the pressed steel yolks and at this age I’d be tempted just to upgrade to a complete new spring set with the later yolks and bigger bolts. However, for now I just overhauled it as I had a few spare yolks.

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Check for wear in the bolts, washers and bushes, new nylon washers can be got from RS online or eBay from memory the washers are 1” x 1/2” x 1/82 or 25mm x 13mm x 3mm but do check, I’m driving past Cluanie Dam now with no Internet Sad smile  More info here http://scoraigwind.co.uk/2012/03/servicing-the-6kw-proven-on-scoraig/ The bolts are M10 x 110 and the bushes are made from 12mm air line with a 1mm wall thickness which can be had off eBay or any commercial vehicle factors (it’s the same as lorry air brake pipe and you just cut it with a Stanley knife.

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It was a great opportunity to try out the impact wrench that the new smiley postie delivered.

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That ‘little job’ took me all afternoon, more because I kept getting distracted than anything else, and with wifey working a late shift at the Raasay Distillery I was glad of my son making dinner.

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Welsh Rarebit pork chop https://www.bbcgoodfood.com/recipes/2215/rarebit-pork-chops I was most impressed Smile Even had a fine view out of the window as the cruise ship MV Prinsendam glided by

After dinner I went round to the turbine and did an hours work replacing the springs, greasing the bearings and inspecting the slip rings.

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Needing some 7.5mm x 370mm tie wraps and some silicone sealer I left the turbine head itself and went to remove the broken bolt from the base.

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The M20 x 60 bolt came out quite easily really, just drilled a 4mm hole through it and used an ‘Eaziout’.

https://www.stationaryengineparts.com/eazi-out-set-814-0.html

These hardened steel bits are excellent at removing broken studs, they are kinda like a left hand threaded tapered tap. You drill a hole in the middle of the broken stud/bolt then insert the tool screwing it anticlockwise, as the tool bites it extracts the broken stud. However much care is needed when using them cos if they break they’re virtually impossible to drill out Sad smile A couple of things to watch, do not use one that is too big or it will expand the stud making it more difficult to remove. Do not use one too small or you may break it and these are no use for removing bolts that have snapped due to being seized insitu. Chances are if the stud was so tight that it sheared the head off a bolt, then it WILL break your Eaziout.

130 years ago

Came across this on Facecloth yesterday.

1885

https://www.facebook.com/groups/141561509698818/permalink/405217239999909/

It’s a picture taken up at Arnish in 1885 by an unknown photographer so well out of copyright but copies can be had from Raasay Heritage trust http://www.angelfire.com/il2/raasayheritagetrust/ .

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So, here it is today, can’t get the exact spot due to the trees,

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Looking at the same spot from up on the hill.

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