C1 Wiper Transmission

[Brad K.]

Re: C1 Wiper Transmission

Rich...I'm glad you noticed the small bushing...when I disassembled the unit.......it fell out of the larger pulley end of the housing (as opposed to smaller diameter wiper/arm end) I have not seen it on any of the 3 different exploded views that I have seen. Maybe the linear spring is a little shorter on my unit? After everything is assembled though..... the short spline and the longer main shaft splines (as in photo #1) seem to align well.
I'm still puzzled why the two pulleys with the spring inside will not align properly. Maybe I'll work with (the new) spring ever so slightly to get it to fit properly. Maybe I'll shorten both extended ends by grinding them off a LITTLE bit. Got any other ideas??

[Brad K.]

Re: C1 Wiper Transmission

Also.. ...the larger bushing is already pressed into its larger housing......that why I did not try to disassemble them....Also I will measure the length of the linear spring to see if it is shorter than yours

[Brad K.]

Re: C1 Wiper Transmission

Rich....Are you saying that in my 8th photo, the spring is seated in the wrong slot? Would I need to rotate it counterclockwise and let the spring seat deeper into the pulley?

[Richard M.]

Re: C1 Wiper Transmission

Also.. ...the larger bushing is already pressed into its larger housing......that why I did not try to disassemble them....Also I will measure the length of the linear spring to see if it is shorter than yours

The large busing assembly(inner is bronze, outer is steel) has to be a press fit into the wiper housing. It shouldn't spin. That's why I mentioned about peening it to make it a tighter fit when you reassemble.
P6240028.jpgP6240027.jpgP6240043.jpg

Rich....Are you saying that in my 8th photo, the spring is seated in the wrong slot? Would I need to rotate it counterclockwise and let the spring seat deeper into the pulley?

That's what I thought, but I looked at my photos again and it appears that small slotted area is where it sits. You can see where it's been rubbibg on this one below. So I think yours is set in the correct position.

P6240022.jpgP6240023.jpg
Try test fitting the 2 spools together without the coil spring and see if there is any resistance when rotating. IIRC there is a sweet spot" when assembling them with that spring.

I think that smaller bushing fell off the shaft on removal after rereading your posts. I'm pretty sure that goes at the top of the main housing at the wiper arm drive end. Look at the top drive end of your housing and I'd bet it's missing.

All of your pieces are in very good condition. I think once you get the assembly steps figured out it'll be fine.

Rich

[Brad K.]

Re: C1 Wiper Transmission

Rich,
1) My linear spring is 1 1/8" long....If your's is out and available, what does it measure?
2) Relative to the smaller bushing that neither of us knows about on any schematic....are you saying the shaft assembly should look like my first photo #1 before assembly?
3)What are you referring to as "missing"?
Brad

[Richard M.]

Re: C1 Wiper Transmission

Rich,
1) My linear spring is 1 1/8" long....If your's is out and available, what does it measure?
2) Relative to the smaller bushing that neither of us knows about on any schematic....are you saying the shaft assembly should look like my first photo #1 before assembly?
3)What are you referring to as "missing"?
Brad

1) Sorry Brad those photos from a '60 several years ago. Car is gone. But 1 1/8" sounds logical IIRC.

2,3) No that bushing should not be there in your photo#1. With only the bare shaft in your hand, place the small bushing over it ll the way up the the splined end that attaches to the wiper arm. I'm pretty sure it goes there. Then when you install the shaft into the main housing it will sit up at the top of the housing. The upper shaft needs a bushing to ride on. I think it's missing from the top of your main housing as it must have fallen off the shaft when you pulled the shaft out and pieces dropped.

Email me your phone # if you'd like and I'll give a call. Busy day here but I'll make time.

Rich

edit. If that small bushing does not fit over the top and into the housing, it may be pressed into the housing from below the top of the housing. i.e. deep up into the housing from the inside. It may be a press fit and it has worn the housing seating surface. If this is the case, you could take a pointed drift and hit some areas around the outer surface to make it tight, and add a drop of locktite before reinstalling it.

wiper transmission 009Mod.jpg

edit again.....I'm really thinking it's on the inside of the housing. I can see traces of the bushing on the shaft further down from the top. I think that's it.
wiper transmission 009Mod.jpg

[Stephen R.]

Re: C1 Wiper Transmission

Contact FTF(Frank the Fink) either here or on the Corvette forum. He's had a lot of experience with them

[Frank D.]

Re: C1 Wiper Transmission

Contact FTF(Frank the Fink) either here or on the Corvette forum. He's had a lot of experience with them

That's me (FTF) on the Corvette Forum. I say to the OP to run with Rich's guidance; he's forgotten more than I ever knew about these blasted things.... But thanks for the referral...

[Brad K.]

Re: C1 Wiper Transmission

Hallelujah!.......Thanks to the excellent advice I learned here, the wiper transmission is finally rebuilt, mounted back in the car, the cables adjusted with the wipers both fully functional. I thought for a little bit that I was going to have to break down and buy a NOS transmission. I am very proud of my rebuilding skills but I almost lost my cool a couple times. Never will I attempt it again.....

The basic problems were:
1) The screwed up cable torsion spring that was lost and I had to buy a new one
2) The large bushing that lies under the upper pulley was loose and slid in the housing
3) The circular shaped shroud broke loose of its staking and lost both of the little tabs that prevent the lower pulley from sliding off
4) By the time I put it together and took it apart again what seemed like a thousand times...the splines were going away from a good fit

The torsion spring was apparently a little too large for the pulleys and would not allow the pulleys to come together. So quite a bit of fitting and grinding was necessary to where it finally functioned as designed. A tiny bit of JBWeld was necessary on the bushing and the shroud was resolved though some additional JBWeld and some delicate welding of a small piece of flat stock to recreate the tiny tabs. I also took Rich's advice and drilled through the splines to place a small rollpin.

The whole thing was not pretty.....But it works!

[Brad K.]

Re: C1 Wiper Transmission

Tomorrow I will send some pictures so you can gaze upon my "craftsmanship"!!.....My wife says we need to go out to dinner and celebrate!