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Re: Series II wipers

Posted: Tue Jun 26, 2012 1:46 pm
by onion
I've tried today with holding the brushes to the armature, and I was getting some rotation but no more than half a turn.

I'm going to get some new brushes. Do you think I should grease the armature (and if so, with what). And what would you suggest as a suitable replacement for that holding spring? (I was thinking an elastic band, but that's liable to melt/snap)

Re: Series II wipers

Posted: Tue Jun 26, 2012 10:31 pm
by bmcecosse
What 'holding spring' ??? With the rack disconnected - the armature should spin easily. No point fitting new brushes unless you can see that the old brushes are obviously worn out!

Re: Series II wipers

Posted: Tue Jun 26, 2012 11:35 pm
by onion
The brushes are definitely worn down a long way, so they'll need changing soon enough anyway. By holding spring I mean the spring holding the brushes to the armature, managed to solve that bit though, my mum had a spring that fitted nicely.

What does it mean that is doesn't spin freely? Does it just need a good dose of 3-in-1/WD40, or is it more serious?

Re: Series II wipers

Posted: Thu Jun 28, 2012 12:01 am
by bmcecosse
Try some WD40 -can't do any harm. But it should spin easily.

Re: Series II wipers

Posted: Thu Jun 28, 2012 1:57 pm
by onion
well, WD40 and a good clean freed it up nicely. However, when I put voltage through it, it locks up and I can't turn it at all. Ideas?

Re: Series II wipers

Posted: Thu Jun 28, 2012 6:42 pm
by bmcecosse
'When you put voltage through it' - what do you mean? With the motor reassembled - it should spin away nicely when you apply volts to it - but you won't get your fingers to it........

Re: Series II wipers

Posted: Thu Jun 28, 2012 8:18 pm
by onion
When I connect it up it doesn't spin by itself, it just sticks :/

Re: Series II wipers

Posted: Thu Jun 28, 2012 8:44 pm
by bmcecosse
Windings may be burned out if it's been stopped with current running through.............

Re: Series II wipers

Posted: Thu Jun 28, 2012 8:49 pm
by onion
That sounds expensive :( If the windings were burnt out, surely the armature would spin even with current?

Re: Series II wipers

Posted: Thu Jun 28, 2012 10:02 pm
by onion
HAPPY TIMES! I tried the old hit it and hope, and job's a good'un. Just need to regrease the gears and connect it back up :)

Thank you so much for your help, I reckon I'd probably have ended up with a new motor if I didn't have some guidance.

Re: Series II wipers

Posted: Thu Jun 28, 2012 10:03 pm
by bmcecosse
Errr - have you got to Mr Fleming's Left Hand Rule at skool yet??

Re: Series II wipers

Posted: Thu Jun 28, 2012 11:07 pm
by onion
Yep, just still not quite used to applying theory to practice yet.

Re: Series II wipers

Posted: Fri Jun 29, 2012 2:44 pm
by onion
Damn, it's stopped again. just getting really hot :(