dismantaling speedometer

[Dale .D]

I've got myself a used speedo that works to replace my old one . Unfortunatle it's 40000 miles to low a little dirty on the inside, I've read that the lense has to come off & go from there but it doesn't want to come & if I hit it any harder it'll break.Any advise to get it off & also run up the adometer & cleaning or oiling I might do if I do get the lense off without breaking it.Also I once saw a thread on fixing the clock but can't find it any more.Thanks

[hrcollinsjr]

Originally Posted by Dale .D I've read that the lense has to come off & go from there but it doesn't want to come & if I hit it any harder it'll break.

I've removed them by prying on the back of the chrome ring that holds the glass in place. I start and gently bend it upward going around the edge several times straightening the edge a little more each time until I can get the ring off. I hope there is a better method and someone will post it but my way will get the job done.

HTH,
Harold

[Dale .D]

Originally Posted by hrcollinsjr I've removed them by prying on the back of the chrome ring that holds the glass in place. I start and gently bend it upward going around the edge several times straightening the edge a little more each time until I can get the ring off. I hope there is a better method and someone will post it but my way will get the job done. HTH, Harold

Thanks . I'll try it again a with a little more perswasion.Couldn't get to budge a mm before.Is it plastic or metal?

[opeldean]

http://www.opelgt.com/forums/1e-othe...uel-gauge.html

see my post #18

I grind the corner edge off.

[traytodd]

In one of my old posts on the classicopels site at Yahoo, I described how to run a replacement odometer up to match the current one. The post was published in the OMC Blitz. Here it is:

1) Remove the speedo from the case by prying off the front molding.

2) Remove the 2 screws in the back of the case to get at the mechanism. Be very careful of the speedo needle and is quite fragile. The bearings are small and the coil spring is provides the calibration.

3) There is a nylon shaft running from the first shaft to the odometer wheels. There is a worm gear at both ends of this shaft. Remove the shaft by removing the closest screw on the gear box and by loosening the one on the opposite side. Replace the screws.

4) Then using a short pencil with an eraser in a reversible drill, drive the brass gear on the end of the odometer wheel shaft with the eraser. The drill should be in reverse. You should be able to do about 40,000 mph. To go 29,000 miles took me 2 erasers. I put a drop of clock oil on the end of the odometer shaft to make sure it had enough lube for this high speed run.

5) Clean, degrease, inspect everything.

6) Install the worm gear shaft again by loosening the 2 screws again.

7) Use a high temperature grease to lubricate the gears since you can expect high temperatures in a closed car. A small drop of clock oil in the odometer bearings and the speedo bearings should not hurt either.

8) Make sure the speedo needle moves freely before reassembly. (I am doing this because the one in my car binds at 35 mph even after two attempts to repair it.)

9) Clean the glass and trim ring and reassemble.

[Dale .D]

Originally Posted by traytodd In one of my old posts on the classicopels site at Yahoo, I described how to run a replacement odometer up to match the current one. The post was published in the OMC Blitz. Here it is: 1) Remove the speedo from the case by prying off the front molding. 2) Remove the 2 screws in the back of the case to get at the mechanism. Be very careful of the speedo needle and is quite fragile. The bearings are small and the coil spring is provides the calibration. 3) There is a nylon shaft running from the first shaft to the odometer wheels. There is a worm gear at both ends of this shaft. Remove the shaft by removing the closest screw on the gear box and by loosening the one on the opposite side. Replace the screws. 4) Then using a short pencil with an eraser in a reversible drill, drive the brass gear on the end of the odometer wheel shaft with the eraser. The drill should be in reverse. You should be able to do about 40,000 mph. To go 29,000 miles took me 2 erasers. I put a drop of clock oil on the end of the odometer shaft to make sure it had enough lube for this high speed run. 5) Clean, degrease, inspect everything. 6) Install the worm gear shaft again by loosening the 2 screws again. 7) Use a high temperature grease to lubricate the gears since you can expect high temperatures in a closed car. A small drop of clock oil in the odometer bearings and the speedo bearings should not hurt either. 8) Make sure the speedo needle moves freely before reassembly. (I am doing this because the one in my car binds at 35 mph even after two attempts to repair it.) 9) Clean the glass and trim ring and reassemble.

Thanks everyone great advise.Get started this weekend