Dumb (maybe) wiper operation question

gkgeiger

gkgeiger

Senior Member
I have my windshield out of the '39 putting a new weatherstrip on. what a PITA. I thought, what a perfect time to fix my wipers. So I replaced the original vacuum hose which was hard and collapsed. Now the wiper motor works but only makes one swipe. Turn the knob the other way and it goes back. Aren't they supposed to be continuous? In other words, turn on and they go back and forth. Is my motor bad or what? Thanks again for the help.
 
Squirt a little MMO in the wiper motor and give it another try. If that doesn’t help, take the vacuum motor apart (be careful doing this) clean it and coat the "flap" with a small amount of Vaseline. Reassemble and give it a try, it should work fine as long as there are no vacuum leaks.
 
sometimes you disturb the fittings attached to the wiper motor and cause vacuum leaks. If you had better operation before the hose change, suspect a connection unless a dirt dauber built a nest in the hose.
 
40cpe said:
sometimes you disturb the fittings attached to the wiper motor and cause vacuum leaks. If you had better operation before the hose change, suspect a connection unless a dirt dauber built a nest in the hose.
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I had no operation before.

Vic Piano said:
Squirt a little MMO in the wiper motor and give it another try. If that doesn’t help, take the vacuum motor apart (be careful doing this) clean it and coat the "flap" with a small amount of Vaseline. Reassemble and give it a try, it should work fine as long as there are no vacuum leaks.
Click to expand...

Thanks Vic, I took it apart and it was all gummed up. A little brake clean and some lube and it works fine on the bench, fender that is. I'll put it back on the car tomorrow.
 
remove the small cover on the rear. Inside is a valve that moves back and forth switching the vacuum path to reverse the wipers. A few drops of MMO should have it moving again, unless the small spring on the bottom of the valve has broken.
 
Also, Gene
With the windshield out, you might want to check the drain holes located on either side of the body. There were fittings and drain hoses on my 39.
 
Kahuna said:
Also, Gene
With the windshield out, you might want to check the drain holes located on either side of the body. There were fittings and drain hoses on my 39.
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In my plan. I saw the holes from the outside, will check for hoses in the morning. Thanks everyone.
 
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