Speedo 740 GL 1990

[ejb]

The speedo works all the time,but the odo and trip are intermittent.
Sometimes they'll work for a couple of miles,other times a couple of hundred
miles,and then sometimes they don't work at all.

Any ideas ?

 

[Andy Dingley]

The speedo works all the time,but the odo and trip are intermittent.

Common fault - little plastic gears in the instrument are knackered.
http://www.homestead.com/volvo2/88speedo.html

 

[jdunville]

The speedo works all the time,but the odo and trip are intermittent.
Sometimes they'll work for a couple of miles,other times a couple of hundred
miles,and then sometimes they don't work at all.

Any ideas ?

Here is another source for the gears:

http://www.odometergears.com/

 

[James Sweet]

Common fault - little plastic gears in the instrument are knackered.
http://www.homestead.com/volvo2/88speedo.html

Do the gears still have problems on the 700's? I know the pre-'86 240's had
this problem, but the later cars and all 700 series have electronic speedos,
the usual problem for those is bad soldering on the circuit board.

 

[ejb]

"James Sweet" <> wrote >

Do the gears still have problems on the 700's? I know the pre-'86 240's had

this problem, but the later cars and all 700 series have electronic speedos,
the usual problem for those is bad soldering on the circuit board.

I wondered about this as when it's actually working,the 1/10 ths wheel
doesn't rotate at a constant rate but seems to move in small increments,as
if driven by a stepper motor.
Looks like I'll have to get the dash out then,or just put up with it.