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badpenny
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Re: Jubilee Riviera won’t stop spinning

Postby badpenny » Mon Mar 11, 2019 9:46 pm

It's often the spinny vane catching on something as they are quite frail and easily bent.
However it stops in two different places in your video. So I doubt it's that.
I think it might be one of the linkages catching.

Instead of restarting it the way you are, try flicking the vane very gently. If it moves then it's not the vane and you need to look elsewhere.
You'll notice that the levers coming out of the back of the clock operate the three reel stops and the coin slide release, there are several linkages any of which might have a rough edge. That's where I'd be looking.

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coppinpr
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Re: Jubilee Riviera won’t stop spinning

Postby coppinpr » Mon Mar 11, 2019 9:55 pm

First test is to disconnect the arm you have to push from the clock then fire up the mech and see if the clock still stops. Remember the clock is doing several jobs all at the same time. If there is nothing binding on the control arms (the above test should confirm this if the clock still stops), the problem could be inside the clock. Taking the clock apart seems a daunting task at first but it's not that bad and can pay dividends. They are often full of oxidised grease, not to mention odd coins frozen in with the grease. You will also see if there is any damage to the cogs or ratchets. There is a good run through on servicing a clock at the link below (you should not need to remove the bracket, so pick up the method from the 5th photo onward).
Removing a jammed clock bracket and servicing the clock

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atticbrowser
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Re: Jubilee Riviera won’t stop spinning

Postby atticbrowser » Thu Mar 14, 2019 6:22 am

Thank you all for your very helpful advice. I began by looking for possible points where the mechanism could be binding. The only possibility I could identify was where the horizontal brake lever travels through the slot at the far left. There does seem to be contact between the lever and the lower part of the slot. But then looking at the system I see that the three individual vertical brake levers are pressing down on the horizontal lever when it is in the ‘cocked’ position. So isn’t it inevitable that the horizontal lever will be pressing slightly on the bottom of the slot? Or should there be a clear gap below the lever so it can move without touching the slot? If there should be a gap, then my mech doesn’t have it. If this is the isssue what would the solution be? Hope this all makes sense.

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Re: Jubilee Riviera won’t stop spinning

Postby badpenny » Thu Mar 14, 2019 11:02 am

I doubt that's it, the big spring at the back which pulls the clock should easily overcome any friction that causes.

Like I said in my post, it's likely to be either the clock is jamming on something internally or one of the linkages has a sharp edge.
So …..
Let it jam
Then apply gently pressure to the air vane, you'll feel if the restriction is in the clock.
If it's not then …..
Check each of the linkages coming out of the back of the clock. There is likely to be a lot of play in each one as these are not high precision engineering. It not only operates the three reel stops but also the coin slide bundle release at the very end of the cycle. It might be a split pin holding a linkage together that is catching on another part.

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atticbrowser
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Re: Jubilee Riviera won’t stop spinning

Postby atticbrowser » Thu Mar 14, 2019 4:50 pm

Thank you BP. That will, be my task for tomorrow.

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Re: Jubilee Riviera won’t stop spinning

Postby atticbrowser » Sat Mar 23, 2019 11:06 am

Just a quick update, with not a lot to report.
I’ve been continuing to fire the mechanism with mostly the same result BUT on two occasions it has spontaneously applied the brakes correctly and so completed the cycle. I wasn’t able to identify anything about those two successful cycles that was different from the usual stuck ones but it has made me feel that I can’t be far off a solution.
In addition on a few occasions by lifting the vertical reel brake levers, which press down on the horizontal brake lever, the mechanism has completed its cycle. Which seems to support BPs suggestion that it is somewhere in that area that the binding is taking place.
BP also talked about ‘roughness’ (presumably of some contact surfaces). There are certainly some rather rough spots I’ve identified...but what do I do about them. Lubricating hasn’t done the trick. Can I use a file safely on these mechanical parts? Thank you as always.


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