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Rough roads and tracks


Coachman

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Went down to Hampshire and stayed on three CC 5 sites. All were up dirt tracks for about 300 m. All were dry thank goodness but it threw the van about a bit even doing less than walking pace. Anyway , one day after getting on to main road found the speedo not working ,strange, looked at sat nav for speed in towns so ok for that. Coming back to site looked down and speedo is working again.Any idea why?.
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Hello Pastiche.

 

This is a known problem. It was dealt with in Interchange in the October 2006 issue of MMM

 

See the pic. the large blue gear sits just inboard of the special driveshaft joint that allows for the length of the shaft to vary as the suspension bounces up and down. A big bounce can dislodge the four prongs that hold the large gear onto the shaft so that it disengages from the driven gear. Sometimes the prongs re-engage and the speedo comes back on duty but sometimes the driveshaft has to be stripped, its a relatively cheap job although most garages would want to take the gearbox out.

 

If yu want the original much longer article PM me.

2011369257_Boxer1speedogear.jpg.fe6325a5ae26b30a973acd4716bb8ee1.jpg

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Jtd it is then. As its working again it may well be that the power unit jumping around on the rough going dislodged a connector but remade the contact over another bump.

 

There is a statutory defence to having a failed speedo.(a) It happened during the journey ( b) Steps have already been taken to fix it in a reasonable time.

 

But if you are exceeding the limit due to no speedo its still an offence.

 

Concentrating on your sat-nav or phone to check speed is probably driving without due care.

 

Most of us an remember roughly what speed is indicated by our rev counter in top gear but if you can keep up with a six speed box your are a better man than I Gunga-Din.

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