#heat-wave
The Match Unit plunger pulls back well enough to advance the unit, but often not strong enough or far enough to ring the bell.

Weak coil?

I just cleaned the sleeve & plunger last weekend. Had the whole unit apart and degunked.

Have some new sleeves i was going to use to refurb the pops. Could try one of those.

That was all done last weekend. Had the whole advance unit apart & cleaned. The unit advances fine. The coil just doesn’t seem to pull back far enough or perhaps strongly enough to ring the bell all the time.

So,

LTG how do I check for low power? I have a multimeter.

Sleeves may be readily available & forty cents in New York, but here they are $5.40 and a week away (shipping costs & time). Fortunately, I’d just ordered five, along with other pop bumper parts.

This advance unit has no clapper. I’ve put on washers, quarters, dollar coins, 4C8E87FB-7FBE-4CFC-8F87-F57507FE81BB (resized).jpeg and other substitutes. Toyed with different methods of securing them- loose, tight. Adjusted how close and far away the bell is a zillion times.

A previous owner must have had problems, too, because there is a second mounting hole in the bell.

It rings when manually pulled. A soft ring, but better than nothing. But, closing a one point switch only gets an occasional ring.

The unit itself advances fine. It’s hitting the bell that's the problem.
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Also, the bell can’t get too close, because the clapper is on the arm that advances the ratchet. If it doesn’t go down far enough, the unit can’t advance.

Could try making an elongated clapper that points down....

I made a striker from 1/8” steel. Seems to be working.

Held in with neoprene grommet

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I knew this machine was going to be a project, but it’s been the littlest things!

Fixed it with a home designed clapper. The coil is fine.