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david.corbett5(at)btinter
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 Posted: Mon Dec 31, 2007 9:44 am Post subject: Mod 74 - after-effect; and Wm Mills DOTH |
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Help, please!
I incorporated Mod 74 in August ’07 and, as part of the process, I replaced the two pip pins because one of the originals was damaged at the top. The new pip pins, supplied by EA 04 Ltd, are a different part number, 4BLPR2.00.
These pins appeared to be a much better designed and engineered type, but are different in one vital respect; the old pins had a thin key ring right through the head of the centre part of the pin, such that when extracting the pip pins, upward lift on the thin key rings released the balls at the bottom.
The new pins are different in that the “ring” by which they are extracted is “D” shaped, with the two ends fitted into the collar at the top of the outer part of the pin. The “D” shaped part ring is a very soft material, and the holes into which they are fitted are very shallow.
Now I need to remove my wings. When I did Mod 74, both new pip pins went in fairly easily; the port one needed more hand pressure – with a drift – than the starboard one, which was easy to push in.
Today I used my favourite “extraction” tool – a button hook on the end of a metal shoehorn – to try to get the pins out. The starboard pin came up part way easily, then came up against a solid stop; pushing the blue centre part of the pin down whilst pulling the ring had no effect – and in fact the ring then pulled completely away from the collar. Trying the port side was useless – the pin would not move at all, and I did not want to apply too much pressure, otherwise I would have pulled its ring off as well. Refitting the starboard ring in situ, and closing it up tight, is going to be very difficult.
What do I do now?
The simplest answer would be to push the pins up from below, whilst pulling the ring from the top in the normal way; however, although I had a hole for that purpose originally (before the wing “cuffs” were bonded on), I have no hole now, and have no accurate idea where to drill the holes.
Does anyone – in UK initially – have holes for this purpose in the lower part of the wing, and if so could you let me have a template of where to drill the holes?
How would anyone else solve this problem? Has anyone fitted these new type pip pins, and then tried to pull them out after a long period?
Not a good way to end 2007!
May we all have lots of excellent flying in 2008!
Incidentally, whilst writing, Bryan Alsop and I are proposing to organise a DOTH (ie a fly-in) in memory of William Mills and Paul Sweeting, here at Shobdon, in spring 2008. We will soon be asking Europhiles to indicate their interest in attending, but first Bryan and I need to agree a date with Shobdon; watch this space!
Happy New Year to you all!
David
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davidjoyce(at)doctors.org
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| Posted: Mon Dec 31, 2007 10:37 am Post subject: Mod 74 - after-effect; and Wm Mills DOTH |
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David, Could you not extract them with one of those pairs of long nosed
pliers that have teeth on the end? I don't own such an animal but have seen
them in tool shops. A preliminary administration of WD40 might help too but
no doubt you have already thought of that! Regards & Happy New Year David
Joyce, G-XSDJ
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josok-e(at)ukolo.fi
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| Posted: Mon Dec 31, 2007 12:21 pm Post subject: Mod 74 - after-effect; and Wm Mills DOTH |
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Hi David,
Long nosed pliers is the way to do it, if needed you can even hammer one tip to an L shape. I've discarded all pulling rings to prevent "accidental" removement and always use the pliers, part of the tool set in the plane.
Regards,
Jos Okhuijsen
Visit - www.EuropaOwners.org
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ami(at)mcfadyean.freeserv
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| Posted: Mon Dec 31, 2007 12:35 pm Post subject: Mod 74 - after-effect; and Wm Mills DOTH |
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David,
Having an assistant "swing" the wings either slightly forward or backwards (depending whether your replacement pins were longer or shorter respectively than the originals) may allow the pin to be withdrawn with less effort.
Other than that, on mine, I can get to the lower end of the pins via the flap recess, with the flap in the lowered position.
Pip pins need to be kept internally greased too, so that corrosion does not prevent operation or, worse, the balls not springing outwards to lock the pin.
Rgds.,
Duncan McF.
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ptag.dev(at)tiscali.co.uk
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| Posted: Mon Dec 31, 2007 5:15 pm Post subject: Mod 74 - after-effect; and Wm Mills DOTH |
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Hi! David
Count me in on the Fly In.
Happy New year to one and all……may it be better than 2007 …..and release us from Europe !
Regards
Bob Harrison G-PTAG
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Trevpond(at)aol.com
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| Posted: Tue Jan 01, 2008 3:21 am Post subject: Mod 74 - after-effect; and Wm Mills DOTH |
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Hi David,
I'm in for Williams DOTH - looking forward to it.
Trev Pond
G-LINN
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