Wiper blade attachment to gearbox shaft

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Jim Blakewell
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Wiper blade attachment to gearbox shaft

#1 Post by Jim Blakewell » Sat May 27, 2017 3:50 pm

My '60 Roadster #87288 has the wiper gearboxes with the 6mm shaft. The wiper arm recommended by
Stoddard has a small bolt that squeezes on the shaft and a steel insert for the back side. It has a flat surface. Will the clamping bolt provide enough grip or should I file a flat on the shaft for better grip arm to shaft?
What's best practice? (besides don't drive in rain?)
Jim Blakewell

Jim Blakewell
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Re: Wiper blade movement is backwards

#2 Post by Jim Blakewell » Wed Feb 12, 2020 6:03 pm

I have finally got the electrics completed! I remembered someone said to check rotation of shafts before attaching arms. I did and rotation is backwards! Any ideas for correcting this, please?
Jim Blakewell
1960 Roadster 87288
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Martin Benade
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Re: Wiper blade attachment to gearbox shaft

#3 Post by Martin Benade » Wed Feb 12, 2020 6:42 pm

Can you reposition the levers 180 degrees off from their current positions, on the bottoms of the wiper shafts? Or do you have actual gear boxes? If it’s that style I have no experience but maybe switching left and right?

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Doug McDonnell
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Re: Wiper blade attachment to gearbox shaft

#4 Post by Doug McDonnell » Wed Feb 12, 2020 6:43 pm

See Brad Ripley's comment #3 in this link: viewtopic.php?f=1&t=46415&p=313746&hili ... ms#p313746 Sorry unable to help with wiper direction.
1965 356C There is never enough time to do it right, but always enough time to do it over.

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Ron LaDow
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Re: Wiper blade attachment to gearbox shaft

#5 Post by Ron LaDow » Wed Feb 12, 2020 8:23 pm

Jim,
What do you mean "backwards"? The both cycle clockwise and anti-clockwise, right?
Ron LaDow
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Re: Wiper blade attachment to gearbox shaft

#6 Post by Martin Benade » Wed Feb 12, 2020 8:40 pm

I assume he means they park in the wrong direction.

Jim Blakewell
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Re: Wiper blade attachment to gearbox shaft

#7 Post by Jim Blakewell » Wed Feb 12, 2020 9:13 pm

If I install the blades facing the left side of the car the shafts turn clockwise and they will turn the arms into the cowl and tear thing up. I can install the arms facing the right side but that isn't correct.
Reminds me of Charlie Davis who had many cool ideas and parts for our '70's 911es. He showed me how to move wiper blades to the right side so we could see the road better when it wasn't raining. My '73 is still that way.
Jim Blakewell

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Ron LaDow
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Re: Wiper blade attachment to gearbox shaft

#8 Post by Ron LaDow » Wed Feb 12, 2020 9:35 pm

Jim Blakewell wrote:
Wed Feb 12, 2020 9:13 pm
If I install the blades facing the left side of the car the shafts turn clockwise and they will turn the arms into the cowl and tear thing up.
A lot of people learned that the $$$ way; that's the reason to try it w/o blades first. Oh, and making little masking tape flags will make the motion easier to see.
This is memory from some time back, but if the lever on the motor parks 180* off, I think it will produce the result you're seeing. Probably have to take the assembly out to change it, but this time you can prove the action on the bench.
Ron LaDow
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Jim Blakewell
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Re: Wiper blade attachment to gearbox shaft

#9 Post by Jim Blakewell » Wed Feb 12, 2020 9:44 pm

Thanks, Ron. I need to put the motor on the bench anyway now because it quit running!
Jim Blakewell

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Doug McDonnell
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Re: Wiper blade attachment to gearbox shaft

#10 Post by Doug McDonnell » Wed Feb 12, 2020 10:34 pm

Sounds like others have had your problem in the past Jim: viewtopic.php?t=17154 See entry #10
1965 356C There is never enough time to do it right, but always enough time to do it over.

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Ron LaDow
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Re: Wiper blade attachment to gearbox shaft

#11 Post by Ron LaDow » Wed Feb 12, 2020 11:13 pm

Doug McDonnell wrote:
Wed Feb 12, 2020 10:34 pm
Sounds like others have had your problem in the past Jim: viewtopic.php?t=17154 See entry #10
Damn - only 9 years back; gotta take those memory pills!
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Harlan Halsey
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Re: Wiper blade attachment to gearbox shaft

#12 Post by Harlan Halsey » Thu Feb 13, 2020 5:33 am

To answer your original question, yes the screw will provide enough clamping force. But the screw chews into the shaft. This means that after the first set up with virgin parts, you cannot make small angle adjustments, the set screw will just go back to the existing dent. Further, with use the screw may get a little loose and chew up the shaft. It was a poor design and frustrating to deal with. The C cars have a much better design. My solution is not to drive the cars in the rain!

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Re: Wiper blade attachment to gearbox shaft

#13 Post by Jim Blakewell » Wed Feb 19, 2020 7:33 pm

Today I fixed the wipers parking on the wrong side. Removed the ground strap and the radio, then the 4 bolts that hold the assembly under the dash. I was able to lower rhe motor enough to loosen the bolt clamping the arm to the motor shaft and turn it 180 degrees. With the power off the motor was easy to turn so the clamping nut and bolt could be tightened. Bolted assembly back in place and when battery reconnected the motor turned to it's stop position.
Thanks for your help- and for the forum that gives me enough info to try and fix my car!
Jim Blakewell
'60 Roadster
'64 SC Coupe
'73 911T modified
'74 914/w 2.8L
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Doug McDonnell
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Re: Wiper blade attachment to gearbox shaft

#14 Post by Doug McDonnell » Wed Feb 19, 2020 7:39 pm

We love a story that ends well. Thanks for the followup.
1965 356C There is never enough time to do it right, but always enough time to do it over.

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