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Hello Bill, nice to meet you now through this channel.

This makes perfect sense. The outer disc indeed won't move. I had
trouble removing the centre disc, and whacking it didn't come close to
bringing it off. In the end I managed to get it out by making a small
tool from iron wire to pull it out from the two screw holes. I removed
the cone spring. So I'm ready for the releasing oil.....    now what
exactly is releasing oil to you? Would penetrating oil like WD-40  be
OK? And then is the outer disc freely attached to the central shaft or
screwed or otherwise?

The lever operates OK and I did not disassemble it. I only briefly
disassembled the locking nut and cup spring on the underside of the
averager.

Eric



Op 21-1-2012 6:00, Bill Morris schreef:
>
> Hello, Eric
>
> When the averager works normally, you rotate the (outer) vernier disc
> clockwise until it reaches a stop and its zero should coincide with
> the zero of the central disc. Adjust the bright metal piece at the
> bottom right hand corner if necessary to get exact coincidence. This
> is the starting position.
>
> If you then set the main counter to, say, sixty degrees and operate
> the thumb lever back and forth, the zero of the vernier disc should be
> opposite the sixty of the central disc after eight operations.
>
> If you carry on operating the lever a few more times, the vernier disc
> will eventually go through one and a sixth turns and then stop. The
> thumb lever won't move it any further anti-clockwise, but you should
> be able to turn it clockwise until it reaches a stop at zero again,
> ready for the next series.
>
> If the vernier disc won't move in either direction, remove the two
> screws in the central disc and remove the disc and th cone spring
> underneath it. The vernier disc should then lift off the central
> shaft. If it won't, then give it some releasing oil, rest it overnight
> and try again. The central disc is a very close fit in the recess in
> the vernier disc and is best removed by whacking it against the palm
> of your hand until you can eventually grasp the edge between your
> finger nails.
>
> If the thumb lever won't operate, you may have inadvertently
> reassembled it with its little cone spring trapped between the pin nut
> and the shaft. It should lie beneath the pin nut and the back of the
> pentagonal plate.
>
> If this doesn't make sense to you, Let me know and I will send you
> some photos of the deconstructed averager off post.
>
> Kindregards
>
> Bill Morris
> Pukenui
> New Zealand
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