I've got a buddy with a 1940 Buick Special he just got back on the road. Being in FL, having a working wiper system is fairly essential. When he got the car it had no wiper system and he wants to track down the entire setup (motor, linkage, arms) if possible.
He's seen the electric conversion but those require that you have the linkage assembly. I've done a bit of hunting but figured the hive would probably know where to find this stuff.
He might find some parts of this discussion from 2014 helpful: http://forums.aaca.org/topic/232626-1940-56s-wiper-questions/
(And I thought THIS forum dug down to the smallest details. Not that there's anything wrong with that....)
I know the wiper need to be assembled with sliding bearing，how much do everybody here know the sliding bearing？
Hemmings.com?
eBay - beauty is to be able to do such a specific search.
The good part is the Buick in those years shares it's wiper transmissions and probably the rest of the system with other GM cars of the era.
Can't say I'm familiar with a "sliding bearing" in that system.
The vacuum motor is in the center with a linkage going to each transmission. The transmissions each have a small chain and sprockets in the casing. Everything runs in bushings.
The linkage attaches to the inboard side of the transmission which bolts through the cowl. The wiper arm attaches to the output shaft of the wiper transmission.
FWIW, if the motor needs to be rebuilt, there's a company called "Ficken wiper service" that handles it, we've used them before.
Honestly though, if originality isn't a concern, use an electric conversion motor with the original linkage and all your problems will be over. Enough GM cars used the same system that if there's a kit for a 1940 Chevrolet, it will work in your Buick without much trouble.
A third canoe with sliding bearings.
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