Wiper Motor Juddering FIX

RSM Masser

Member
Messages
2,437
The rubber strip your talking about was not glued on my car - its a maserati windscreen (small logo in corner of screen). Thats not to say it should not be glued or sealed - personally I dont think it needs it. The rubber is there to protect the glass from scratching as much as a watertight seal, it will drain into the void where the wiper motor is and from there out of the car - keep the drain holes free of leaves and muck, even though mine lives indoors i was amazed how much **** got in the drain holes.
 

rs48635

Member
Messages
3,181
Me too, big handful of leaves / mulch dragged out of each side. Good job the sealant is so well done, could imagine this a potential rot spot in future.

On my car the rubber seal was attached to the one piece plastic cover (yours has a join), albeit coming adrift at one end. Yours appears stuck to the screen.
So long as it is attached to one piece, it should stay in place, rather than falling into the void beneath.
 

stradaman

New Member
Messages
376
The juddering is usually one of 3 things.
Wiper is worn, or dirty. Use some silicone on the rubber, to soften it.
Windscreen is greasy.
Wiper arm [spring] is pushing the arm too ******* the windscreen.

I have stopped wipers juddering, simply by bending arm, very very slightly. Makes a big difference, as long as screen and wiper clean and in good condition. Just check how the rubber, is sitting on the screen.

Andy.
 

safrane

Member
Messages
16,749
There is a known fault with the motor that it gets bunged up with grease which makes it shudder on the way up and down on intermittent...not to be confused with poor wipers.
 

stradaman

New Member
Messages
376
How can grease make it shudder? Poor contacts? I bet when the arms are removed, and cleaned/greased, its this, that sorts the problem.
I still recommend checking how the wiper sits on the screen, and give wipers a thorough clean with WD40, followed by some silicone, wiped up and down the blades.

Andy.
 

safrane

Member
Messages
16,749
Its in the motor, the contacts degrade, gunk up and cause the shudder, much more pronounced than bad blades.

There is a 'strip and fix' post on how to take the motor apart and get it back to perfect which is at the start of this post.
 
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conaero

Forum Owner
Messages
34,594
Its the contacts getting dirty/greasy that causes the juddering, it was the same on the GTV, my 3200 but never saw it on my GS.

There is a fix on here somewhere.

Basically you take the motor out, clean the contacts and the contact disc, job done.
 

stradaman

New Member
Messages
376
90% of judder, is down to arm strength. 30 yrs in the car trade has seen this. Amount of cars, i have quietened, adjusting the arm. Not convinced, pulling the motor apart, is the solution. Horses for courses.
I am willing to be convinced otherwise. Maserati wipers, are like most Italian cars, even like most european cars!

Andy.
 

safrane

Member
Messages
16,749
All I can say Andy is that on normal mode my wipers were perfect, however in flick mode they shook like some dodgy robot arm even if they were lifted off the screen no matter how much WD40 and screen wash was used. I fitted a new motor [£250] and they were perfect. it has been recorded by many owners on this car and Alfas.
 

davidhowson

Junior Member
Messages
474
It was the same with my 4200, cleaned out the motor contacts and now perfect on the same wipers.
-David-
 

stradaman

New Member
Messages
376
All I can say Andy is that on normal mode my wipers were perfect, however in flick mode they shook like some dodgy robot arm even if they were lifted off the screen no matter how much WD40 and screen wash was used. I fitted a new motor [£250] and they were perfect. it has been recorded by many owners on this car and Alfas.

I have a juddering wiper.
Looks like 2 new wipers are needed[passenger side blade has split]. So looks like i will need to look at the motor!

Andy.
 

Danny

Member
Messages
442
He guys, I did this fix some time ago and although the wipers performed fine directly after, the juddering returned a couple of days later.

Currently, the symptons are: only juddering in the 1st position (interval). No juddering in the 2nd (normal) and 3rd (fast) positions. And finally: only juddering during the first 3, 4 or 5 swipes. After that, no more juddering and they just perform fine. Someone has a clue what I have done wrong/ should have done better?

I only cleaned the contact plate and re-greased the worm (see pictures). Should I have sanded the contact area?

img0110ap.jpg


img0114en.jpg
 

CatmanV2

Member
Messages
48,557
That's a good photo. I can see where the problem comes up now. The only thing I'm having trouble getting my head round is which track controls which function. I'm going to *guess* that the outer track is for intermittent, but it might also be the inner track. The lighting is a bit tough, but yes, I'd think a gentle polish might well help. As would maybe bending the contacts down a little bit.

Always a sod when the only test is to put it all back together again.

C
 

conaero

Forum Owner
Messages
34,594
I only made the assumption as I had a GTV with exactly the same fault, TS, 1999 Phase 2 model. Thes cars are renowned for sharing parts, if it does not look the same then don't buy it.
 

CatmanV2

Member
Messages
48,557
Right, I had some more thoughts about this (I do my best thinking when I'm running)
I reckon that the other track is the auto park system
The middle one is the normal speed, the inner one is the intermittent control, and the high speed is just straight 12v.
It looks to me that you've got some damage at about 1 on the clock (although it may be the lighting) and that would match to about half way down, assuming clockwise rotation of the control discs.

One of these will be in my kit before I start:

http://www.ebay.co.uk/itm/Fiberglass-Pen-Fibre-Pencil-Abrasive-Cleaning-PCBs-Etc-/190384502242

C