My wipers touch each other at one point on the way up, and when they park, the passenger side doesn't go down far enough. I thought, just take them off and turn them a notch or 2 on the spline. Unfortunately they're keyed so you can't do this. Is there any other way to adjust them?

 

They're not really keyed but rather splined. The thing that looks like a key is a retainer.



Push the tab and the arm will come off. You can then move it one tooth. If that's too much and your wiper arms are original, there is a screw adjustment about half way up the wiper arm. This will move it a little up or down. Might be enough to take care of your issue.

Just had to do this on mine and the pic is from another forum member that helped me.

 

I have never been able to move the arm one click but will try it someday as I thought they only went on in one place. The screw on the side of the arm may take care of the hitting or in the center on the linkage the holes are slotted for adjustment.

 

The adjustment for my wipers is in the center off the motor drive. Select which arm you want to adjust, loosen the two nuts, adjust the wiper position, (this will result in very little movement on the center drive link but results in a large adjustment at the wiper position relative to the windshield) then retighten the nuts. The proceedure is detailed in AIM. Since the ends of the wiper are keyed there is no adjustment on them. Hope this helps! I have pics if you need them.

 

 

 

I believe that I saw those nuts you're talking about, but didn't realize that there was any adjustment there. I'll try it tonight. Thanks!

 

OK, I adjusted the wipers down to where they're supposed to be. The passenger side doesn't interfere with the door closing anymore. But, they're still touching on the downward stroke. They're fine on the upward stroke. I'm sure it's from the bushings that ride on the motor shaft being worn. I took them off and they are worn. Are these available from anywhere? I've looked several places but no one lists them.

 

One last thing is I hope you have been keeping water on the windshield as they work different when dry. I have not seen the bushings for sale.Did you try the small screw on the side of the arm it is an adjustment.

 

I'm trying to get them to work both wet and dry. Occasionally you do turn them on while still dry.

I didn't see any adjustment screw, but I'm not sure that they are the original arms. They're marked Trico, is that what GM used?

 

Check the Paragon catalog P.93. You can download it from their website. They have rebuild services and may sell you just the parts you need.
Glenn

 

If you are working on a 69 the 69-73 original arms have metal tubes and the screw is on the side. With the wiper door other type arms may not work.

 

Thanks, I'll look again.

 

My 72 AIM gives an adjustment procedure for the arms. Tells exactly where to put them and how to adjust. Do you have an AIM? I am not home so i can't copy the instructions down. I know this is also in the 71 manual so it should be in most (all?) of the AIMs.

Gary

 

If the bushings are worn, making "band-aid" adjustments will only help for a while. Better to fix it right now, by only having to replace bushings, than letting it wear more to the point of having the arms bind and tearing up the motor.

 

We have the wiper arm adjustment listed in our repair help section at this link.

http://willcoxcorvette.com/product_i...ducts_id=24447 68-72

http://willcoxcorvette.com/product_i...ducts_id=24446 73-82

 

Thanks everyone, I found the adjustment screws, they were hiding behind the washer tubes. Since the arms are enclosed, I'm not sure how it actually works, but it makes adjustments very simple.

I was able to move the upper bushing shells off to one side and tighten them up for now. The machine shop I use said they may be able to build up the worn spots with brass if it becomes a problem again. Probably the most the wipers will be used is when they check them for the state safety inspections.

Thanks again!

 

YEP! That is what I was talking about.

 

Can any of You guys tell me what to do when the wipers make the journey up and down in a jumpy way regardless of wet or dry windshield ?
Peter

 

Things that will cause jumpy wipers:

If you look at the picture posted on the site for the 1973 and up wipers there is a better view of the wiper transmission nuts. These nuts clamp a strap down on top of the wiper bell crank stud. Make sure there is plenty of grease on this pivot crank stud!

If the clamp is worn or the ball stud is shot, or if the bushings are worn out in the transmissions, this will cause this. But one thing often forgotten about is if you have a worn out shaft on the end of the wiper arm where the blade connects to it you will get this every time you use the wipers.

Another cause… Generic wiper blades!

You can check the wiper transmission for excess play by holding the shaft that runs from the wiper transmission base to the bell crank and then move the wiper arm. There is no documented free play listed in any manual that I’m aware of, but if the play is excessive this too will cause the wiper arms to jump or skip. There should be little or no movement between the arm in relation to the linkage. If you have this problem, you need a new or used transmission.

In any case, we have plenty of used transmissions in stock. They are not listed on the web site so you would need to call sales if you need one. I think a good used transmission is about 25.00 per side. You would need to call sales at 800-588-3883 to verify the cost. But I’m sure it’s not more than that.

Willcox Inc.