Monitor eBay. The drive units show up regularly. I sold one a few months ago.
Won't be cheap.
Dennis C.
Sent from my iPhone
On Sep 12, 2012, at 9:52 AM, Tortuga <[email protected]> wrote:
> During our last sail, the wheel drive for the Autohelm ST4000 on our 1979 30
> mk1 stopped engaging. When I moved the drive lever into the engage position
> it seemed to not catch, although it stayed in position. The unit was clicking
> away but the wheel was not engaged.
>
>
>
> I put a note on the Raymarine tech forum, asking whether I should take the
> wheel drive apart. I received a reply, asking “What color is the wheel drive,
> Black or Gray?” I replied that I thought it was black faded to dark gray.
>
>
>
> I received another reply, "There is no adjustment on black wheel drives, and
> unfortunately no parts available any longer as well. Sometimes with those
> symptoms, changing the belt might help, again there are no parts available
> but there is a company…"
>
>
>
> I took the wheel drive apart and found that the cam mechanism was rotating on
> the shaft connecting it to the drive lever Once there were 2 pins which
> passed through the cam and the shaft to prevent the cam from free-rotating.
> They had been worn down or snapped off. The remains were still lodged in the
> shaft.
>
>
>
> As a temporary fix, I cut 2 thin brads to length and shoved them through the
> cam and shaft, then placed them both back into the drive wheel assembly,
> jammed the wheel drive back together and put the drive lever back on.
>
>
>
> I haven’t had a chance yet to try it out because of the winds and rain from
> Leslie.
>
>
>
> I have contacted CMC Electronics to ask about a replacement drive eccentric
> assembly. I was told someone there will call me back.
>
>
>
> My apologies if this has been discussed too many times before. Is it a common
> problem? What are my chances of finding a replacement assembly?
>
>
>
> Thanks
>
>
>
> Derek Kennedy
>
> C&C 30 mk 1
>
> Ballantyne's Cove, NS
>
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