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| Why has my speedo needle gone haywire?? https://www.ausmini.com/forums/viewtopic.php?f=2&t=74981 |
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| Author: | tsb [ Fri Jan 13, 2012 1:18 pm ] |
| Post subject: | Why has my speedo needle gone haywire?? |
All of a sudden our speedo needle has statred jumping around, odometer still reads fine but needle goes mad??? I have oiled the speedo cable it moves ok and the fitting that fits into the back of the speedo seems fine ?? Any ideas? cheers tsb |
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| Author: | adamstuart [ Fri Jan 13, 2012 1:23 pm ] |
| Post subject: | |
Mine does this too, sometimes it will get stuck, other times it will just go all over the place And squeak like a mad man, worst part is, the squeak gets faster and louder with revs.. |
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| Author: | drmini in aust [ Fri Jan 13, 2012 1:24 pm ] |
| Post subject: | |
1. If needle is just moving up and down a bit probably the cable has a slight kink in 1 spot. If it's flicking around the dial and back I'd say either the speedo head is worn out (needle drum touching the magnet), or else you have got oil inside the speedo head. It is good practice to leave the top 4-6" of the cable dry to avoid this, when you lube it. Adam, re the squeaking, note that most new cables now are supplied dry and somtimes with free rust. Clean and lube before use. 
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| Author: | Harley [ Fri Jan 13, 2012 1:32 pm ] |
| Post subject: | |
With my minis, I've always found you can tell its a kinked cable if the bouncing only happens in a 20 km/h range somewhere on the speedo, eg mine does it between 40-60, but not faster and not slower. If its bouncing at a higher speed, problem is more likely elsewhere. |
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| Author: | tsb [ Fri Jan 13, 2012 1:56 pm ] |
| Post subject: | |
I think i have got oil in the speedo by the sounds of dr minis suggestions,so how do i fix that?? Tsb |
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| Author: | Morris 1100 [ Fri Jan 13, 2012 2:20 pm ] |
| Post subject: | |
It can also be caused by a dry bushing inside the speedo head. To much oil is bad, dried up 40 year old grease is also bad. My advice is to send the speedo to an instrument repairer and get it cleaned and serviced. |
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| Author: | grey 64 [ Fri Jan 13, 2012 6:44 pm ] |
| Post subject: | |
Lubing a speedo cable is news to me. Please explain. |
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| Author: | drmini in aust [ Fri Jan 13, 2012 7:22 pm ] |
| Post subject: | |
You pull the inner out and wipe it with molygrease- Castrol LM or LMM or equivalent. Leave the top bit dry as said above. Once upon a time they had lube in when new, they seem to be supplied dry as a bone now. 
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| Author: | cush [ Fri Jan 13, 2012 7:41 pm ] |
| Post subject: | |
It could be restless leg syndrome.. |
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| Author: | TK [ Fri Jan 13, 2012 8:14 pm ] |
| Post subject: | |
My speedo used to do the same, bounce al over the place. I sort of had to take an average. LOL I replaced the cable with a new cable and wallah, perfect. |
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| Author: | 9YaTaH [ Fri Jan 13, 2012 8:26 pm ] |
| Post subject: | |
drmini in aust wrote: 1. If needle is just moving up and down a bit probably the cable has a slight kink in 1 spot.
If it's flicking around the dial and back I'd say either the speedo head is worn out (needle drum touching the magnet), or else you have got oil inside the speedo head. It is good practice to leave the top 4-6" of the cable dry to avoid this, when you lube it. Adam, re the squeaking, note that most new cables now are supplied dry and somtimes with free rust. Clean and lube before use. What the good Dr said...or it can be just some iron particles have found their way into the mechanism...people do tend to leave their "precision" instruments lying open on benches with a lot of magnetised crap lying around 
M1100 advice: My advice is to send the speedo to an instrument repairer and get it cleaned and serviced... |
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