Dave pb Posted September 6, 2018 Report Share Posted September 6, 2018 HI Just been out for a drive and noticed both mileometer and tripometer stuck after a mile or so. Speedo still working normally. Stopped the car, engine still running. Started off again both meters working, a mile later both stick in the same place i.e the same place on the tripometer right hand digit 1/10th mile. Repeat the process, 2 or 3 times, same thing everytime. Any ideas? Dave === Link to comment Share on other sites More sharing options...
Pete Lewis Posted September 6, 2018 Report Share Posted September 6, 2018 The oddometer rolls are indexed by a small pawl driven off a worm inside the head, the pawl lever pivots and might even use gravity to operate the ratchet wheels. This simple mechanism gets dried out , so its off with the chrome rim remove the glass undo the screws I the back and lift the inards out of its case You will see the pawl and levers , simple lubrication will generally bring it back to life light oil , not wd40 stuff. No need fo remove needles or the face , whist inside oil the main shaft , dont grease the magnet or drive disc Pete Link to comment Share on other sites More sharing options...
Colin Lindsay Posted September 7, 2018 Report Share Posted September 7, 2018 Ever tried resetting the mileage on a speedo? I tried it once with a car that I'd restored after it had been abandoned for years and thought a speedo starting off at 000000 miles would reflect the mileage of the reconditioned engine and reborn car... sadly the digits all ended off looking totally skew-wiff so had to fit another spare. Any tips would be welcome as I might try it again someday... Link to comment Share on other sites More sharing options...
dougbgt6 Posted September 7, 2018 Report Share Posted September 7, 2018 I'm told the preferred method is an electric drill on the speedo cable, forward or reverse depending on closeness to zero. That's just what I've been told. I don't really know. Doug Link to comment Share on other sites More sharing options...
Pete Lewis Posted September 7, 2018 Report Share Posted September 7, 2018 from my days running the factory tachograph centre you had a neat little jig to hold the rolls , this allowed the index ratchets to be disengaged between each drum roll and you turn the drums to what reading was required, like match the replacement, doing it DIY with a few beers in tow will always end up winky wonky digits , it designed to show up any fiddling as Colin found out 0o0oo01 Pete 1 Link to comment Share on other sites More sharing options...
Dave pb Posted September 7, 2018 Author Report Share Posted September 7, 2018 Thanks Pete. I'll give it a go Dave ==== Link to comment Share on other sites More sharing options...
Dave pb Posted September 7, 2018 Author Report Share Posted September 7, 2018 Just to be certain.... I have to get the whole speed out first, right? Link to comment Share on other sites More sharing options...
Pete Lewis Posted September 7, 2018 Report Share Posted September 7, 2018 Yes removed from the dash , apart from access and the need for some sticky plaster its unscrew the cable nut and just two knurled nuts that hold /clamp the speedo into the dash, there is a rubber ring behind the rim wich will be old and tacky sticks the speedo in place Theres another under the glass , this sticks the glass as well, new O rings are available can be silly prices but cheapest is buy a length of 1.5 mm dia rubber and cut it to length supa glue the joint. to make an 0 ring On the back of the speedo is mounted the small gauge voltage stabiliser , needs the wires /lucar disconnecting . Pete Link to comment Share on other sites More sharing options...
Dave pb Posted September 7, 2018 Author Report Share Posted September 7, 2018 Ok. I thought so, but hoped not. Not much room under there. I might replace the voltage stabiliser with an electronic one while I am at it. Thanks Pete Dave Link to comment Share on other sites More sharing options...
Gully Posted September 7, 2018 Report Share Posted September 7, 2018 The odometer and trip 'pause' on mine each time I clock over another 1000 miles. Quick tap on the face of the speedometer gets them moving again! Gully Link to comment Share on other sites More sharing options...
Pete Lewis Posted September 8, 2018 Report Share Posted September 8, 2018 Forgot to say you need to undo the trip reset cable driveeither from the lower dash or undo the bayonet type fit in theback of the head Which is a simple half turn to disengage it from the case Pete Link to comment Share on other sites More sharing options...
Mad4classics Posted September 8, 2018 Report Share Posted September 8, 2018 Auto electrical spares sell the square section rubber seals and spong sealing cord by the meter in different sizes depending on the gauge size, just cut to length as Pete indicated. https://www.autoelectricalspares.co.uk/bezels-glass--seals-for-smiths--lucas--jaeger-gauges-68-c.asp David Link to comment Share on other sites More sharing options...
NonMember Posted September 8, 2018 Report Share Posted September 8, 2018 12 hours ago, Gully said: The odometer and trip 'pause' on mine each time I clock over another 1000 miles. Quick tap on the face of the speedometer gets them moving again! My GT6 suffers that on 100 mile rollover, especially if the trip is aligned with the odo. Unfortunately, the "tap on the face" doesn't work and they often remain "paused" for quite a few miles. Link to comment Share on other sites More sharing options...
Pete Lewis Posted September 8, 2018 Report Share Posted September 8, 2018 As I said depends on the exact speedo but on many the pawl amd ratchet relies on some gravity A tap on the glass lets it know whos boss , I guess its the ......gravity of the situation !!! Pete Link to comment Share on other sites More sharing options...
Dave pb Posted September 8, 2018 Author Report Share Posted September 8, 2018 Well, getting the speedo out is impossible. I can't get my hand up there, never mind finding the right bits to twiddle. I might try the tap-on-the-face method. Dave Link to comment Share on other sites More sharing options...
Dave pb Posted September 8, 2018 Author Report Share Posted September 8, 2018 The tap on the face method isn't working. Now to figure out how to get the speedo out. Dave Link to comment Share on other sites More sharing options...
JohnD Posted September 8, 2018 Report Share Posted September 8, 2018 If I may, while it's out, revise the wiring. At present, putting the connections back is groping behind the dash, in the dark, or else lying on yiur back with a torch in your mouth. Unless you have one of thiose forehead things. All modern cars will have a single multiway connector from loom to any electrical item. It's easy to copy this, and insert a multiway ( See: http://www.vehicle-wiring-products.eu/product.php/613/multi-connectors-6-3mm Other suppliers may be used , of course). Then, before inserting the gauge back into the dash, you recah in throughb the hole, pull out the inner end of the multiway, plug it into the tail on the gauge and re-fit the gauge. Job done! See pic, original on left, with multiway on right. John Link to comment Share on other sites More sharing options...
Dave pb Posted September 8, 2018 Author Report Share Posted September 8, 2018 like the idea. Might give it a go. If I can get it out in the first place. Link to comment Share on other sites More sharing options...
Pete Lewis Posted September 8, 2018 Report Share Posted September 8, 2018 Thats why I mentioned sticky plaster, some triumph are easier than others Same needs as head torch, upside down varifocals, hard hat and 999 on speed dial And thats just to do the speedo Ha!!! pete Link to comment Share on other sites More sharing options...
Gully Posted September 8, 2018 Report Share Posted September 8, 2018 2 hours ago, Dave pb said: The tap on the face method isn't working. Now to figure out how to get the speedo out. Dave If you remove the heater knobs and open the middle segment of the dash it's much easier to access the back of the speedo and one of the two holding clamps. Gully Link to comment Share on other sites More sharing options...
Pete Lewis Posted September 8, 2018 Report Share Posted September 8, 2018 Go on then what about the ........other one Ha Pete Link to comment Share on other sites More sharing options...
Badwolf Posted September 11, 2018 Report Share Posted September 11, 2018 Don't do what I did when fitting led bulbs to the dials. Put my hand under the dash to get at the speedo, twisted my wrist to get better access, couldn't get my hand out. The more I struggled upside down etc etc, the more my hand swelled up, the worse it got. Got out eventually, but the fire brigade could have had fun with that one. Link to comment Share on other sites More sharing options...
Dave pb Posted September 11, 2018 Author Report Share Posted September 11, 2018 Speedo is out!, Mid-section unscrewed made it possible, otherwise I don't see how. However Chrome bezel won't come off. Is it just stuck on via the rubber seal ? Bit of brute force required? Dave == 1 Link to comment Share on other sites More sharing options...
Colin Lindsay Posted September 11, 2018 Report Share Posted September 11, 2018 Chrome bezel will rotate with sufficient but gentle force - don't distort it or bend anything. The rubber seal will probably have dissolved into rubbery glue. You can unpick the tabs on the rear but they're brittle, can snap easily, and never go back the same way as before if bent. To refit, rotate the speedo - no wires attached - until the furthest bolt is right beside you. Attach the clamp, spring washer and nut, then tighten until it grips but also slides. Then rotate the speedo until it's in the correct position where you can get at the other bolt. You can usually tighten this one fully as is, but when you come to the other one, awkward though it now is, just a few more degrees will tighten it fully - much easier than trying to fit the screw along the entire length of the bolt from underneath. 1 Link to comment Share on other sites More sharing options...
Dave pb Posted September 12, 2018 Author Report Share Posted September 12, 2018 On 9/8/2018 at 5:22 PM, JohnD said: If I may, while it's out, revise the wiring. At present, putting the connections back is groping behind the dash, in the dark, or else lying on yiur back with a torch in your mouth. Unless you have one of thiose forehead things. All modern cars will have a single multiway connector from loom to any electrical item. It's easy to copy this, and insert a multiway ( See: http://www.vehicle-wiring-products.eu/product.php/613/multi-connectors-6-3mm Other suppliers may be used , of course). Then, before inserting the gauge back into the dash, you recah in throughb the hole, pull out the inner end of the multiway, plug it into the tail on the gauge and re-fit the gauge. Job done! See pic, original on left, with multiway on right. John Hi JOhn I'm working on this idea, but I have 10 cables going to the speedo. 2 for oil lamp, 2 for ign lamp, 2 for beam lamp, 3 to volt stabilizer, one to illumination lamp, (actually 11, an earth cable to one of the fixing bolts). Did you rationalise these in anyway to get an 8-way connector? Dave ==== Link to comment Share on other sites More sharing options...
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