Andreas Reinhold Posted April 6 Share Posted April 6 Hello, rookie caterham-owner from Germany here, please be gentle... 😉 Today the speedo on my 275s started working intermittently. After some troubleshooting I noticed, that the speed sensor gear on the right driveshaft had moved about 3-5mm towards the diff, causing the sensor not being able to "see" the teeth. I pried the gear back in place and everything was back to normal, however I'm wondering if there is anything to prevent this from happening again? Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted April 6 Member Share Posted April 6 Welcome The guide to speedometers. There's some previous discussion of the reluctor ring becoming loose or moving: Jonathan 1 Link to comment Share on other sites More sharing options...
BigCol Posted April 6 Share Posted April 6 I had exactly the same Andreas - the ring isn’t rigidly fixed. I “moved” mine back (some precision tapping with a hammer/screwdriver) and then used epoxy adhesive to hold it in place. It has been fine since. That said, it was whilst my diff was being worked on, so the driveshaft was on the bench and everything easily accessible. I don’t know how easy it would be with the driveshaft in situ. 🤷🏼♂️ 1 Link to comment Share on other sites More sharing options...
Ralph45 Posted April 6 Share Posted April 6 Evening Andreas, Mine did exactly what yours has done, migrated towards the bolts.It was an easy fix. All you have to do is move the reluctor ring so you can properly clean the mating surface where it should seat by removing any corrosion or road dirt to give you a nice clean surface. Then try your best to clean the inside face of the ring if possible, I used isopropyl alcohol on all surfaces to remove any grease or left over residue from cleaning. Use some stud locker on the surfaces and the tap the ring back into position rotating the driveshaft to ensure it is perfectly inline with the sensor and has no wobble as you rotate the driveshaft. leave for the stud lock to go off, then enjoy blatting with a speedometer again. I hope this sorts your problem. Ralph Link to comment Share on other sites More sharing options...
Ralph45 Posted April 6 Share Posted April 6 I’ve just read BigCol’s post, so basically the same story.The only difference was mine was on the car when I fixed it but still really easy to sort. Link to comment Share on other sites More sharing options...
BigCol Posted April 6 Share Posted April 6 and that you used Loctite rather than Araldite to keep the ring in place… Link to comment Share on other sites More sharing options...
Ralph45 Posted April 6 Share Posted April 6 These were my options. I only got to first base, stud lock, araldite was to be my braces if the belt failed. 😆 Link to comment Share on other sites More sharing options...
Andreas Reinhold Posted April 6 Author Share Posted April 6 Thanks guys. I will give it a try with Loctite which I have available. I will clean it as much as possible and then hope for the best... Just a (maybe stupid) idea... putting a CV boot clamp in front of the ring additionally? Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted April 7 Member Share Posted April 7 The good news is that no-one seems to have reported recurrence. There's a lot of different locking compounds labelled Loctite. Experiences and recommendations, please. Jonathan https://next.henkel-adhesives.com/us/en/articles/choosing-the-right-threadlocker.html ... and that's just those designed to be used on threaded fasteners... Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now