Hi Jerry,
If you are interested, you can rebuild the tach by taking it apart. Dirt can
cause it to freeze, also lack of lubrication can also cause it to squeal.
Take the tach out of the car of course. Remove the bezel, this can be hard
work, with out breaking the glass. There is a gasket in the bezel. It should
with a little effort twist off about a 1/8 of a turn. Remove the screws in the
back and look at the condition of the small spiral clock spring. If it is
sprung look for another tach. If the inside looks good, then it can be
rebuilt. They get gummed up in the bearings. You need to disassemble the
cable drive part and clean it with a degreaser. Then oil it with a light oil,
3 in 1 oil works good. Reassemble it and it should turn free. Clean the dirt
off the large disk, it's magnetic and collects iron pyrite. Reassemble
everything and test with a small screw driver. Turn it rather quickly after
inserting it in the square tach slot. The needle should move.
Hope your eye sight is better than mine. I don't think I would attempt this
now. The screws are pretty tiny and hard to hold. I'm doing this from memory
so it may be a little out of order. You might have to remove the needle I
don't remember. They are press fit and the shaft bends very easy so be careful.
The way I look at it is it broke all ready, so you can't hurt it.
Good luck
Wrongway Ricky
60 Frog eye Puddles
Don't let the road get you down, get down on the road.
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