McSparky Posted November 12, 2010 Share Posted November 12, 2010 Since doing this I stumbled across this article http://triumph.daveola.com/NOTES/Speedo_Repair.pdf which gives much more information on the inner workings but I thought I would post this anyway. The story is my odometer has never worked since I bought the truck and I want it to work. It's probably easier to just buy a refurbished unit but due to location that's not (probably) an affordable option plus I'm curious to see how they work. Removing the gauge from the dash is straight forward; just 2 lug nuts on the back. Remove the front outer bezel by twisting it and remove the two screws at the back of the gauge. The front glass sits in a metal cup which should just pull out. Don't seperate the glass from the metal holder unless you have to because the o-ring will probably disintegrate. Gently tip out the guts. The needle is just pressed on and twists off fairly easily but you have to hold this bit on the back to stop it turning. Remove the needle and then you can remove the two screws holding the dial face on and remove the dial face. Peering in, the problem is apparently a very seized gear shaft and the worm gear has been turning (and rubbing away) against locked gears! I hope it's ok. Undo the 4 screws and seperate the two halves of the gauge. You don't have to do this. Remove the retaining clip on the shaft, the spring and the lever. I tapped out the shaft using a hammer and bolt. It was VERY stuck, and you can see why. Clean up everything with your solvent of choice, apply much grease and reassemble. You can see where the gear teeth have worn away. Luckily this didn't effect anything but I have yet to test it at great speeds. Also make sure this spring is not too slack and holds the lever properly against the odometer gear. I had to dismantle everything again to correct this. Urg. Quote Link to comment Share on other sites More sharing options...
Gazzar Posted November 12, 2010 Share Posted November 12, 2010 Nice one! Thanks for this, I was always scared to look inside one of these. G. Quote Link to comment Share on other sites More sharing options...
Phil Hancock Posted November 13, 2010 Share Posted November 13, 2010 For the mods. A reansfer to the tech archive i would suggest. Quote Link to comment Share on other sites More sharing options...
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