Latching switches

Clarence3815

Western Thunderer
Many years ago I bought some latch switches from Maplins. They also sold kits whereby you could assemble several switches into a frame and then pressing any switch would release another.

At last I have reached the stage at which I wish to assemble a six gang unit but I can`t get it to work reliably. I have two four gang units of the same type that were assembled by a friend about 36 years ago that work reliably.

Individual switches work correctly. I have three sets of frames for a six gang unit and all parts look identical and match parts for a four gang and two gang unit.

I can`t feel any burrs on the parts and dimensionally I think they identical.

Any ideas?

As far as I can tell there is no lubrication on the old working units.

TIA
 
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