Gnarff

Hi

I live in a country where screenwhipers are an essential part of my car, so I have a huge problem: Yesterday, my screenwhipers seemed to slow down, as if there wasn't enough power to keep them moving (and that in the normal, fast and interval position). Eventually, they are doing about 1 minute to move across the front window. When I put them out, I can hear a rattling noise about 10 seconds after the whipers stopped whiping.

Any suggestions about the cause of the problem and how to fix it (as soon as possible...)

Thanks

Lode

944 '86

Hans

Hi Gnarf
Start with checking the grounds and contacts on the motor and the main ground behind the battery in the tray.
You can find the wiring diagram on the Pelicanparts web page.

Motor is located in the tray under the hood, just before the window.

Note: remove the wiper arms for testing while the hood is open, there is a fair chance they will hit the edhe of the hood.

Caution: the gear reduction tha that huge that the power from relative small motor is converted to huge torque.
The mechanism is capable of cutting screw drivers and pliers, so MIND THE FINGERS.
TakeCare

jim968

You might also try oiling the shafts that come thru the body work... the ones that the wiper arms mount to (after removing the arms). There's a stationary tube, and the shaft is inside that. Try a penetrating oil first, to loosen any old lube or other crud in the clearance between the tube & shaft; then a drop or two of good oil on each one (light motor oil will work).

Jim, who gets to play with the forklift again today...

Gnarff

Hi

thanks for the advice. I'll try to dismantle the screenwhiper unit. (jim968: I have some special oil at home, which I can use to loosen the bolts)

The weird thing is dat the slow motion effect of my whipers did happen suddenly (in about 5 times trying to use the screenwhipers). I hope to find the cause of the problem very quick.

Hans, thanks for the pelicanparts tip. I found the diagramms

Greetz

Lode

Gnarff

Jim968

Thanks a lot, your hint did the trick. I have put some penetrating oil on both shafts after removing the top bolts, and after a few minutes, the whipers where whiping as never before!

Greetz

Lode
<img src="graemlins/jumper.gif" border="0" alt="[jumper]" />

Hans

Hi Lode

Strange me... Mechanical engineer still thinks that electrical driven parts with problems = electrical problem!!

Time to take the mechanism apart and re-lube the hole thing with graphite based grease (like molycote).
There are some more of these joints inside with hardned out grease.
Thanks for the feed-back.
TakeCare

jim968

Posted by Hans:

"Strange me... Mechanical engineer still thinks that electrical driven parts with problems = electrical problem!!"

Thats because we mechanical engineers _know_ that the mechanical parts were designed by fellow mechanical engineers, who are by definition infallable.... yeah, right! (Anybody want to buy a bridge?)

Seriously, yes, if the oiling freed up the wipers, they do need to be dismantled & (semi-) permanently re-greased. The oil is fine for troubleshooting, but won't last for more than a few months.

Odd how _everybody_ overlooks this lube point until there's trouble... just like window tracks & hatch release mechanisms...

Jim, gotta go sort some donated equipment... a _lot_ of chaff for not much wheat...

Hans

Jim:
..who are by definition infallable.... yeah, right!

Thanks, this realy restored my faith in fellow engineers (and most of all myself...)
TakeCare