Duf-end

 I disassembled the entire movement. 

Split this image in half and you have the two separate trains of the movement.

The four wheels on the left are the time train and the five on the right are the strike train (that fifth one at the top is not easy to discern in this shot... it's the dark fan). Each train starts at the bottom from its power source. The largest wheels are geared to accept the chains from the weights. The time train is composed of four wheels, signifying that it is an eight day movement, topped by the escape wheel which is easily identified by its sharply pointed teeth. 

The fly tops the five wheeled strike train. The addition of a fifth wheel helps slow the speed of the train as does the fly which is that thin, flat fan at the top, made of brass that is built specifically as a kind of braking / regulating system. When it spins the fan slows the train just enough (from wind resistance) to keep the train from moving too fast and thus limits the clock from striking too quickly.

The wheels look pretty good. They're dirty but nothing too worrisome.

Slightly worrisome is that there is some wear related defects that I will have to repair... someday. 

See that groove along the barrel of the pivot? I'm pointing to the tip of the pivot with my x-acto blade. Here's a close up.

That groove around the pivot is the beginning of damage that, if uncorrected will only get worse and could seriously impair the function of the clock. 

I need a lathe.

It's for another day because likely it will take a number of years running uncorrected before that will start wear dramatically.

Here's the cleaned up pallet face of one arm of the escapement that I showed in an earlier post. 

The face is worn. Serious now? No. Serious one day? Yes.

More metallurgical skills needed.

Meanwhile, for now, a cleaning of the movement was all that was essential. 

No worn pivot holes requiring bushing. Nothing obviously bent or broken.

I will add that the examples of wear I've highlighted do indicate that this clock saw regular use for a fairly long time. But overall this movement is in great shape.

The cleaning was simple enough and I got the movement back together in a couple of hours.

First the two plates aligned and reassembled with all the interior gearing meshed. 

Reassembled the time works on the front plate.

No big surprises.

Similarly the reassembly of the striking works on the back plate was straight forward.

Well there was a fair bit of tweaking the pin wheel so it sat exactly right on its arbor and meshed correctly with the lifting levers. Those two heavy screws are for making that adjustment.

OK a lot of tweaking.

And then there was the strike hammer brake. 

Lord don't make me have to disassemble this again in the near future.

Then I got the pendulum suspension and crutch in place and put in a new suspension spring.

Remember our JB Weld victim?

Old "repaired" vs. New

You can see how the thin metal strips of the new spring allow the pendulum to rock back and forth.

Put the hammers on and put her up on the test stand.

I opened up the weights.

Looks ship shape.

Engaged the chains. Hung the weights and gave it a test run.

She runs!

But there's more to do.