Speedo Adjustment Lever
Discussion
I've been a little silly, and hoping the collective wisdom of PH can bail me out.
My odometer had stopped working, so I took the speedo out and disassembled it to see if I could figure out what was up.
There was a worm gear that had come out of it's mounting hole, so I reseated that. While doing that, I accidentally moved a plastic lever inside the speedo mechanism. With hindsight, this is obviously some sort of adjustment/calibration mechanism. I wasn't sure where it was positioned prior to me moving it ... so settled on a position about half way through the movement arc.
Upon reassembling and taking for a test drive, 2 things are very obvious. Firstly, my odometer still isn't working! Secondly, my previously bob-on speedo is now overreading by about 10% or so.
Does anyone know which way to move the adjustment lever to decrease the speed being shown? Is it moving the end of the lever towards the front (dial) on the unit, or towards the back?
My odometer had stopped working, so I took the speedo out and disassembled it to see if I could figure out what was up.
There was a worm gear that had come out of it's mounting hole, so I reseated that. While doing that, I accidentally moved a plastic lever inside the speedo mechanism. With hindsight, this is obviously some sort of adjustment/calibration mechanism. I wasn't sure where it was positioned prior to me moving it ... so settled on a position about half way through the movement arc.
Upon reassembling and taking for a test drive, 2 things are very obvious. Firstly, my odometer still isn't working! Secondly, my previously bob-on speedo is now overreading by about 10% or so.
Does anyone know which way to move the adjustment lever to decrease the speed being shown? Is it moving the end of the lever towards the front (dial) on the unit, or towards the back?
So this is just in case anyone googles this in future.
Took it apart again, and my memory was playing tricks on me. The adjustment lever runs clockwise/anticlockwise, not forward/backwards.
I've worked out that anti-clockwise makes the speedo over-read and clockwise makes it under-read.
I took a punt and moved it to a point that felt right. I also noticed 1 of the wires going to the odometer motor was pinched, so I quickly bodged in a bypass.
Put it all back together and back in the car (I'm getting good at disassembling/reassembling the dashboard). The odometer now works, and the speedo now under-reads by about 20%. So I need to move the adjustment lever again. 3rd time lucky!
But feeling pretty upbeat, it feels like progress - even if I've not quite completely solved it.
Took it apart again, and my memory was playing tricks on me. The adjustment lever runs clockwise/anticlockwise, not forward/backwards.
I've worked out that anti-clockwise makes the speedo over-read and clockwise makes it under-read.
I took a punt and moved it to a point that felt right. I also noticed 1 of the wires going to the odometer motor was pinched, so I quickly bodged in a bypass.
Put it all back together and back in the car (I'm getting good at disassembling/reassembling the dashboard). The odometer now works, and the speedo now under-reads by about 20%. So I need to move the adjustment lever again. 3rd time lucky!
But feeling pretty upbeat, it feels like progress - even if I've not quite completely solved it.
I'm a little surprised at the fact you could get the speedometer / odometer apart and back together again OK. Well done!
You don't state what year it is but regardless, my 1998 Cerbera that I had a few years ago had the same as the ones in the post '95 Chimaera and Griffs. You can't get it apart without bending up the outer bezel, something that usually needs to be done by specialists.
You don't state what year it is but regardless, my 1998 Cerbera that I had a few years ago had the same as the ones in the post '95 Chimaera and Griffs. You can't get it apart without bending up the outer bezel, something that usually needs to be done by specialists.
sixor8 said:
I'm a little surprised at the fact you could get the speedometer / odometer apart and back together again OK. Well done!
You don't state what year it is but regardless, my 1998 Cerbera that I had a few years ago had the same as the ones in the post '95 Chimaera and Griffs. You can't get it apart without bending up the outer bezel, something that usually needs to be done by specialists.
Mine's a 98. I got in using nothing more technical than a small screwdriver to lever the back of the bezel away from the casing. When I pull it apart again to adjust the lever (hopefully for the final time!) I'll grab some photos.You don't state what year it is but regardless, my 1998 Cerbera that I had a few years ago had the same as the ones in the post '95 Chimaera and Griffs. You can't get it apart without bending up the outer bezel, something that usually needs to be done by specialists.
It's got stickers on to say it's previously been serviced, so I don't know if they modified something to make future access easier.
There were firms that could repair them (JDO and not-so-speedy cables ), the odometer sticking due to a worn motor inside the most common issue, but no spares are available now. 
Caerbont do new ones, even with various colours, but only with the LCD odometer display. They do all the silver rimmed instruments too.
There's sometimes residual damage if you do it yourself, but it's at the back and not visible I suppose when refitted.
), the odometer sticking due to a worn motor inside the most common issue, but no spares are available now. Caerbont do new ones, even with various colours, but only with the LCD odometer display. They do all the silver rimmed instruments too.
There's sometimes residual damage if you do it yourself, but it's at the back and not visible I suppose when refitted.
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