Windscreen wiper motor assembly advice please - SV650.org

06-11-12, 03:01 PM

Hi guys, before I complain to an ebayer, need to check my theory! I bought a used windscreen wiper assembly off of ebay, like the one pictured below, however on arrival, and like the one I removed, it doesn't even move by hand?

Now am I wrong or should this be possible? Or is the motor really that powerful?

Cheers for any answers.
Ian

tigersaw · 06-11-12, 03:19 PM

yes, most likely high gearing.
I cant turn my leccy screwdriver tip round by hand, same reason

06-11-12, 03:20 PM

From memory from my time working at Honda they don't. Maybe your old one does due to a fault.

Sid Squid · 06-11-12, 03:25 PM

You can't turn the them by hand usually - there's a lot of reduction between the motor pinion and the quadrant.

If possible take the cover off the motor pinion and turn it by hand.

06-11-12, 03:25 PM

If you find a nearby car (not your own) and try to use the wiper blade to turn the motor you'll find that the wiper blade just bends and breaks, the motor wont turn, and that you're now wanted for vandalism.

06-11-12, 03:32 PM

Cheers guys. The mounting was so corroded it fell off during transit anyway. Just wondered if there were any more issues to add to my woes haha

06-11-12, 04:03 PM

Quote:

Originally Posted by Stenno

The mounting was so corroded it fell off during transit anyway. Just wondered if there were any more issues to add to my woes haha

Well how are you going to fix it to your helmet then!

06-11-12, 04:23 PM

Quote:

Originally Posted by sputnik

Well how are you going to fix it to your helmet then!

Boom boom

SIII · 06-11-12, 04:50 PM

http://auto.howstuffworks.com/wiper1.htm

Use of worm gear will mean you will be unable to turn the motor. Unlike with ordinary gear trains, the direction of transmission (input shaft vs output shaft) is not reversible when using large reduction ratios, due to the greater friction involved between the worm and worm-wheel, when usually a single start (one spiral) worm is used. This can be an advantage when it is desired to eliminate any possibility of the output driving the input.

Hope this helps to explain.

06-11-12, 07:00 PM

We need at least a picture of the rotter.

06-11-12, 03:01 PM	#1
Stenno Guest Posts: n/a	Windscreen wiper motor assembly advice please Hi guys, before I complain to an ebayer, need to check my theory! I bought a used windscreen wiper assembly off of ebay, like the one pictured below, however on arrival, and like the one I removed, it doesn't even move by hand? Now am I wrong or should this be possible? Or is the motor really that powerful? Cheers for any answers. Ian

06-11-12, 03:19 PM	#2
tigersaw Member Mega Poster Join Date: Mar 2005 Location: Llanwrtyd Wells Powys Posts: 1,146	Re: Windscreen wiper motor assembly advice please yes, most likely high gearing. I cant turn my leccy screwdriver tip round by hand, same reason

06-11-12, 03:20 PM	#3
daveyrach Guest Posts: n/a	Re: Windscreen wiper motor assembly advice please From memory from my time working at Honda they don't. Maybe your old one does due to a fault.

06-11-12, 03:25 PM	#4
Sid Squid No, I don't lend tools. Mega Poster Join Date: Jul 2003 Location: Skunk Works, Nth London Posts: 8,680	Re: Windscreen wiper motor assembly advice please You can't turn the them by hand usually - there's a lot of reduction between the motor pinion and the quadrant. If possible take the cover off the motor pinion and turn it by hand. __________________ If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing. "a deathless anthem of nuclear-strength romantic angst"

06-11-12, 03:25 PM	#5
Spank86 Guest Posts: n/a	Re: Windscreen wiper motor assembly advice please If you find a nearby car (not your own) and try to use the wiper blade to turn the motor you'll find that the wiper blade just bends and breaks, the motor wont turn, and that you're now wanted for vandalism.

06-11-12, 03:32 PM	#6
Stenno Guest Posts: n/a	Re: Windscreen wiper motor assembly advice please Cheers guys. The mounting was so corroded it fell off during transit anyway. Just wondered if there were any more issues to add to my woes haha

06-11-12, 04:50 PM	#9
SIII Member Mega Poster Join Date: Apr 2010 Location: Dumfries and Galloway Posts: 1,319	Re: Windscreen wiper motor assembly advice please http://auto.howstuffworks.com/wiper1.htm Use of worm gear will mean you will be unable to turn the motor. Unlike with ordinary gear trains, the direction of transmission (input shaft vs output shaft) is not reversible when using large reduction ratios, due to the greater friction involved between the worm and worm-wheel, when usually a single start (one spiral) worm is used. This can be an advantage when it is desired to eliminate any possibility of the output driving the input. Hope this helps to explain. __________________ "You know, Scotland has its own martial arts. Yeah, it's called Fuk-U. It's mostly just head butting and then kicking people when they're on the ground" The Stoppy King Last edited by SIII; 06-11-12 at 04:51 PM.

06-11-12, 07:00 PM	#10
monkey Guest Posts: n/a	Re: Windscreen wiper motor assembly advice please We need at least a picture of the rotter. Last edited by monkey; 06-11-12 at 07:01 PM.

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