Trico Wiper Motor Moves Only One Direction

[some mech 3]

I just finished rebuilding the original Trico motor on my 1930 standard roadster. When I pull out the sliding switch the wiper blade moves to the left and stops. When I push in the sliding switch the wiper blade returns to the opposite side and stops. One of you Model A people can diagnose the problem. Looking forward to hearing from you. Thanks.
Some mech 3

[chap52]

After rebuilding mine complete with new paddle seals (?) it was quite stiff and needed to be encouraged by manual assistance. Only been a couple of weeks so it still needs encouragement. My next "exercise" for it will be using the vacuum from my shop vacuum to help it to break in.
I will tape one end of some vacuum hose into a small vac nozzle I have for cleaning small crevasses and let the uninterrupted vacuum exercise the unit into smooth operation.
Sound great in theory. Chap

[Gary WA]

Originally Posted by some mech 3

I just finished rebuilding the original Trico motor on my 1930 standard roadster. When I pull out the sliding switch the wiper blade moves to the left and stops. When I push in the sliding switch the wiper blade returns to the opposite side and stops. One of you Model A people can diagnose the problem. Looking forward to hearing from you. Thanks.
Some mech 3

A bit of oil on the leather blade inside,remove line, a couple squirts of a light wt oil-3 in 1 or sewing machine oil works.

[JOHN CT]

Have you tried it with the windshield wet ? When it comes to a wiper it needs water for lube for the blade to flow smoothly. Just a thought

[Tom Wesenberg]

I don't think a shop vac has enough vacuum to run a wiper.
Are you sure the wiper switching mechanism is flipping over when the wiper reaches the end of the stroke?
Also, as John said, the glass should be wet.

[BILL WILLIAMSON]

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Mine worked after heating it with a hairdryer
Bill Clicking