Chris A Posted November 27, 2019 Report Share Posted November 27, 2019 Good morning all, well it would be a good morning if it wasn't pi**ing down AGAIN! The trip distance dial doesn't work properly, Herald 13/60. It turns the 1/10th drum but when it gets to '9' it restarts again from '0' but the unit counter doesn't move on. I don't want to change the whole speedometer unit as everything else works correctly and is even quite accurate. I am contemplating trying to replace just the trip counter unit, have any of you done this? I realise that the unit in my current speedometer may be repairable as it is only 'slightly' broken but if I had a replacement to hand I would be happier in trying to change the whole unit rather looking to fix it. I have coped with the fault for over 4 years but I would like it to work if possible without changing the whole speedo and at a limited cost. I assume the speedometer isn't really designed to be opened and tinkered with but I assume it is possible with the correct tools, i.e. screwdriver, hammer and strong language. Any comments, tips, thoughts much appreciated. Thanks Link to comment Share on other sites More sharing options...
dougbgt6 Posted November 27, 2019 Report Share Posted November 27, 2019 Chris, The little I know is the speedo is difficult to get out and a real bugger to get back in. (If it’s similar to mine) There’s a elongated clamp on either side and thumb wheels. They can be undone, but getting it all back together requires a triple jointed wrist. I’ve also read getting the right replacement speedo for your set up can be troublesome, depending on gearbox and rear axle. Good luck! Doug Link to comment Share on other sites More sharing options...
Pete Lewis Posted November 27, 2019 Report Share Posted November 27, 2019 most tripp and oddo roll problems come from the small pawl ratchet arrangement that nudges the rolls the operaating lever is driven from a worm on the mains spindle the lever pivot is sprung , the grease goes hard the lever stays stuck in nomans land a clean and lube will normally resurrect it dont mess with the ratchets between the rolls as once alignment is upset its a long job to re arrange them hardest job is getting the rim and glass to let go of the nasty gooey rubber seal , pry the lugs on the rim to aid rotation and removal then its all easy , do not take the needle off pete 1 Link to comment Share on other sites More sharing options...
dougbgt6 Posted November 27, 2019 Report Share Posted November 27, 2019 And don’t touch the decals, they come off on your fingers! Doug Link to comment Share on other sites More sharing options...
Qu1ckn1ck Posted November 27, 2019 Report Share Posted November 27, 2019 If all else fails, try Speedy Cables London Ltd ! Nick Link to comment Share on other sites More sharing options...
68vitesse Posted November 27, 2019 Report Share Posted November 27, 2019 As Pete says getting the rim of is awkward, did this on my Vitesse speedo and rev counter the other year to fit new rims. Fit a large jubilee type clip around the rim to support it when levering up the tangs or it will distort, I used closed cell black neoprene cord as a seal when replacing rim. Regards Paul Link to comment Share on other sites More sharing options...
Chris A Posted November 27, 2019 Author Report Share Posted November 27, 2019 Thanks guys. I am tempted to leave well alone, don't want to risk wrecking the whole unit. 🙄 Link to comment Share on other sites More sharing options...
68vitesse Posted November 27, 2019 Report Share Posted November 27, 2019 You wouldn't be the first to repair to destruction. Regards Paul Link to comment Share on other sites More sharing options...
Chris A Posted November 27, 2019 Author Report Share Posted November 27, 2019 25 minutes ago, 68vitesse said: You wouldn't be the first to repair to destruction. Regards Paul Not ground breaking, then. If I can't be first I'm not playing 😜 Link to comment Share on other sites More sharing options...
Pete Lewis Posted November 27, 2019 Report Share Posted November 27, 2019 no have a go have a look if it only needs a dab of lube you will kick yourself for not trying Pete Link to comment Share on other sites More sharing options...
Iain T Posted November 27, 2019 Report Share Posted November 27, 2019 Chris, if you don't want to tackle it yourself speak to Richfield Speedograph they refurb instruments but be prepared to pay! I have a Ford type 9 gearbox in my Vitesse and they (Richard if I remember) supplied a right angle drive so the speedo cable wasn't bent to so tight a radius it kept on snapping. One of the many issues I had with the hapless quality of work I had at Jigsaw and had to sort out myself. Link to comment Share on other sites More sharing options...
Adrian Posted November 27, 2019 Report Share Posted November 27, 2019 I used them to refurb the dials in the mini pod, new bezels, fix the mile counter, internal clean etc together with the two small dials about £90 as I recall. Link to comment Share on other sites More sharing options...
Chris A Posted November 28, 2019 Author Report Share Posted November 28, 2019 I would like to tackle it myself as the problem should only be slight, although it could be a gear wheel is broken or some such. I spotted a speedo for sale on the bay a couple of days ago for a good price, it would give me something to practice on and could be a donor for the bits. However the seller hasn't replied to either of my mails yet. The inconvienience of sending the unit away is, apart from cost obviously, not having the car available for weeks/months (?). Thanks for all the comments and suggestions. Link to comment Share on other sites More sharing options...
Ben Caswell Posted November 28, 2019 Report Share Posted November 28, 2019 Try resetting the trip to zero and give it another go. I had a similar problem and it was just the tumblers had got stuck. This maybe useful https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=2ahUKEwia4vjDjo3mAhWP-aQKHa1-ATYQFjAAegQIARAC&url=http%3A%2F%2Fobswww.unige.ch%2F~wildif%2Fcars%2Fdocs%2FSmith-jaeger_speedo_repair.pdf&usg=AOvVaw33d-onw9QrtuVptkc8F_SJ Link to comment Share on other sites More sharing options...
poppyman Posted November 28, 2019 Report Share Posted November 28, 2019 I have the same on my Dolomite, sometimes it re sets first time other times three or four goes. Tony. Link to comment Share on other sites More sharing options...
Chris A Posted November 28, 2019 Author Report Share Posted November 28, 2019 Ben: Thanks for the link, I have scrolled through it and will give it a read over the week-end I hope. Ben & Poppyman : I have tried resetting to zero many times but it doesn't. The 1/10th drum turns but has difficulty engaging the unit drum it tries to turn it but doesn't quite seem to catch. This again leads me to think it is only slightly broken 🙄 Link to comment Share on other sites More sharing options...
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