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Speedo does not work

Posted: Sun Nov 05, 2006 9:15 pm
by Rob_Jennings
I hope that someone might be able to give me a few more things to try on this problem....

The speedo was a bit touch and go and then finally gave up all together.

I removed the cable from the gear box end and turning it by hand the needle rises so the head is fine and the cable seems OK.

So next step was to replace the pinion wheel that takes off from the back of the gear box, I removed this yesterday and as expected the nylon wheel was very worn, even flat on one side. So in went the replacement but I still get nothing.

I have a spare cable, but doubt it will make any difference, since it all works fine from that end and it does not look rounded which is the normal problem.

All I can think of is to try and refit the pinion wheel again incase it is misaligned, but that will have to wait until I can get some more oil, as I used the last I had to top the box back up after the first try.

But I'd welcome more ideas at what might be wrong? I assume the cog that drives the take off cant really wear out or become unattached form the shaft?

well I await ideas

oh and one last question.... MOT is on Wednesday, is a broken speedo a failure?

Cheers

Posted: Sun Nov 05, 2006 9:33 pm
by JimK
Speedo is not part of the test, according to this page.

I don't know how authoritative it is, but my car has an MoT and the speedo hasn't been connected for at least three years.

I'm thinking of buying a Road Angel or suchlike as the speedo is not exactly accurate when it is working...

Posted: Sun Nov 05, 2006 9:58 pm
by d_harris
I thought the speedo was part of the test.......

Posted: Sun Nov 05, 2006 10:05 pm
by JimK
I've done a bit of googling, and several pages agree that the speedo is not part of the test.

It does, however, seem that having a working speedo is a requirement of the construction and use regulations.

So, the test doesn't require it but other law does.

Posted: Sun Nov 05, 2006 10:07 pm
by d_harris
I know my dad got done in the 80s for not having a working speedo in his mini

Posted: Sun Nov 05, 2006 11:06 pm
by Packedup
Dan_Harris wrote:I thought the speedo was part of the test.......
http://www.motuk.co.uk/manual/contents.htm

Nope.

A working speedo (on vehicles fited with one...) is part of the C&U though as pointed out, and might get you a fine if you get pulled by a very anal, very bored, very determined ociffer...

Posted: Mon Nov 06, 2006 8:59 am
by Rob_Jennings
Thanks, thats one question sort of answered

But more importantly any more things to check to get it working again?

Cheers

Posted: Tue Nov 07, 2006 4:14 pm
by Kevin
I removed the cable from the gear box end and turning it by hand the needle rises so the head is fine and the cable seems OK.
Hi Rob Im surprised that you could turn it fast enough, I would have checked using a drill on the end. The other way to check the gearbox end of things is to see if the cable is turning while driving, removing the speedo is probably easist or if you have a spare cable connect up and run it into the car and see if it turns.

Posted: Tue Nov 07, 2006 5:03 pm
by Rob_Jennings
I did have the speedo out and rolled at low'ish speed holding the cable and could feel no movement ;-( thats why I hoped the swap of the pinion wheel would fix it.

I'm running out of ideas

Posted: Tue Nov 07, 2006 5:12 pm
by Axolotl
might get you a fine if you get pulled by a very anal, very bored, very determined ociffer...
Is there another sort?
:P

Posted: Wed Nov 08, 2006 8:41 am
by Rob_Jennings
hummm

do you think these cars really have a character, today on the way to the test centre the speedo sprang into life I wonder if it might keep working and am still mistified as to why it stops.

oh, and I'm pretty sure its not a stuck spring/needle as the mile counter stops at the same time.

Posted: Wed Nov 08, 2006 9:25 am
by JimK
That's just odd.

Mine is as dead as a very dead thing so I'm going to try some of these ideas.