I am back from vacation but need a few days to see what’s going on and get back into the swing of things so another rerun for you all.
Originally posted 7/28/09: Following on my success with the Super gauges intended for my TI and the two Sprint Speciale gauges, I decided tackling the last gauge for the SS was the thing to do yesterday when I spent some hours at the shop.
Outwardly the Tachometer was the middle child, not so cosmetically usable as is as the tri-gauge and not so obviously water damaged as the Speedometer. Functionally it was not much better off than the Speedometer. This is how it went:
I would probably have paid $40 for this on eBay and been disappointed when I received it if I didn’t know then what I know now. Needles are pointed where they belong but other than that it looks bad. At least the plastic insert is not yellowed.
This all has to come apart. To remove the needle you hold the aluminum wheel the post attaches to and pull it off. Had I been thinking I would have marked the relationship of the aluminum wheel to the body with the needle on the post to make sure it went back together the same way. We’ll see how it goes.
Here’s the face after. I use 3M hand glaze on the spots, rub it gently then polish it down with one of those microfiber cloths then clean it with IPA on a lint free wipe. Last step is some high pressure air to blow any dust away.
Here’s the oil pressure mechanism. I didn’t take the time to figure out how it worked but I assume the oil pressure (engine oil is actually piped up to the back of the gauge) pushes on something that is resisted by a spring, the higher the pressure, the farther it pushes the needle against the spring indicating pressure via the needle on the plastic insert markings.
I seem to have skipped photographing a few steps. Here I have the drive mechanism reassembled to the base, plastic and face that make up the gauge face. All this was cleaned the same way as the oil pressure gauge.
Here the newly assembled face and mechanism are in the bucket, the repainted glass support ring and polished glass await assembly. The glass required a lot of care with fine steel wool, a fresh razor blade, mothers mag polish and finally IPA. Came out very nice!
And here it is almost back together. I say almost because I had to adjust the needle so it stopped against the post. We’ll see what it takes to calibrate this later I suppose. As I said at the outset, this is mostly a cosmetic operation.
This took me about 2 hours. If all I was doing was polishing and dusting it would have been an hour tops. Anyone need some gauges cleaned? I’m on a roll!