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Originally Posted by AGAREL
....are there new serations formed when you bolt down the assembly. I successfuly got the wipers to work, but now they park up as the previous writer said....
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My suggestion is to synch the motor with the parked position of the blades.
To do this you need to remove the screw and take the eccentric off the motor shaft. Then, have someone turn the wipers on and then off again. Watch to see if the motor cycles and momentarily goes into reverse just before it stops. It should do this.
My memory is a little short on whether the eccentirc locks or unlocks in the run position, but in either case,
it has to do both to run the wipers OR park them. I may have the un-lock and lock reversed. There is a pin and pawl arrangement inside the eccentric clutch that engages or disengages when the motor goes into reverse to park the wipers.
(Better yet, find a friend with a working set of wipers and watch to see how the eccentric works. That will tell you what to do in order to re-park the wipers so they will park at the cowl. Pay close attention to how the eccentric locks and unlocks because you may have to unlock it manually before re-installing it.)
At this stage, the motor is in the parked position. You can bring the blades down to the cowl and then re-attach the eccentric being careful to note whether the eccentric is either in the un-locked or locked position (based on and confirmed by viewing a working vehicle).
As mentioned in this thread elsewhere, there is a tiny spring and lever on the underside of the eccentric assembly. It rides up against a stationary post when the motor goes into reverse and disengages the clutch so the wipers will park. If the lever and spring are covered in road dirt and appear 'dry' of lubricant, this causes the wipers to park at the 'A' pillar because the clutch never disengages.
As for the serrations in the hub assembly, the assembly is made to be softer than the motor shaft to ensure a proper engagement of the splines, but I believe there is a taper to it that makes it bind really well.
In order to ensure it seats deep enough to create new splines, you could remove a small amount of material off the tip of the motor shaft (no more than .040 inch though). This will cause the shaft to seat a little deeper before it 'bottoms' bringing the sides closer together.
I took the eccentric apart and cleaned it then lubricated it with wheel bearing grease and 10w30 motor oil...sort of a light grease mixture. When I had the wiper assembly out about a year ago to provide more room for shock removal, I lubed the wiper shafts and all linkage points before re-installing the assembly.
There is a one time, one way clip on the bottom of the eccentric that can be removed if you are careful and then re-installed using a vise and a socket of the same size as a press. That was about 3 years ago.
Hope this helps.