I'm very curious as to why is broke. The original, 'high quality' Land Rover-made cable had broken at exactly the same place, and I attributed that to resistance at the speedometer end due to seized lubricant. But the speedometer has now been redone, and there should be no such resistance. From the 'spaghetti' of the cable winding wire, it almost looks as if it broke by being twisted in both directions, as if putting the vehicle into reverse put stress.
Could it be that because the odometer does not move backwards, when the vehicle moves backwards, the cable twists? Would not the designing engineers have compensated for this? I'm sure there's a reasonable answer, but I don't know what it is right now!
Below: The first view, as removed from the gearbox housing.
A gentle tug with the pliers and the cable remains came out.
A view of the cable shavings around the gearbox entrance.
View of a new replacement cable, as it should be.
Hi Mike
ReplyDeleteYour Speedo cable could keep breaking beacause of a very very tiny spring inside the speedometer itself being disconected. This tiny spring is connected to the prawl which advances the milage numbers. When you reverse the vehicle the spring pulls the prawl out of the way. If this spring is not connected the cable breaks. I broke 2 cables before I found this fault.
Good luck Victor (1962 Dormobile)
Thanks, Victor, good point. Yes, I'm aware of that very small spring. In this case, something appears to have made the speedo shaft seize, possible some dirt dislodged due to vibration. I've cleaned it out, lubricated with teflon powder, and tested the unit with a drill - seems to be working again! Just need some good weather for a test drive....
ReplyDeleteHi Mike
DeleteSounds like you fixed it. If you find the MPH reading is off after all the messing around with the speedo and it is the correct number speedo for your tire size you can gently pull the needle off and reposition it to give a differant reading. But the actual road distance traveled may still be incorrect
You have done a great job on your Rover. It looks great.
Victor