Wiper Box / Motor Alternatives? - Defender Source
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  #1  
Old September 10th, 2014, 01:12 PM
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Wiper Box / Motor Alternatives?

My wipers are terrible. I don't think it's unique to my truck, but basically the motor spins at two speeds, driving a helical cable back and forth like a sawzall, which then engages some gears in two stamped steel wiper boxes which then move the wipers back and forth somewhat. The bad news is that at the low setting they barely cover half the windshield. At high setting, they overshoot whatever setting I set it at. When it's raining, they overshoot even more, sometimes enough to fly off

My boxes are lucas-style wiper boxes:

http://workshop-manuals.com/landrove...oned_vehicles/

http://www.erareplicas.com/427man/wiper/index.htm

Is there an alternative to the early wiper boxes that has reasonably deterministic wiper behavior? Is there a TD5 or later box that can be retrofitted to the earlier Defenders? Perhaps something with servomotors or position sensing mechanisms?
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  #2  
Old September 10th, 2014, 01:18 PM
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Old September 10th, 2014, 01:35 PM
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Look at some of the products aimed at the street rodders. I see that sort of thing advertised in Street Rodder magazine, but I haven't dug deeper. I do know that the cable driven wiper box is pretty common.
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Old September 10th, 2014, 01:37 PM
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You need to tighten up the wheel boxes. They get loose and you get the result that you describe. Easy, quick job. The wipers should not have much play when setup correctly.
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Old September 10th, 2014, 01:39 PM
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Quote:
Originally Posted by Red90 View Post
You need to tighten up the wheel boxes. They get loose and you get the result that you describe. Easy, quick job. The wipers should not have much play when setup correctly.
I think what you are describing is more common than we all might think
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Old September 10th, 2014, 01:42 PM
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Yep. There are lots of things like this that people live with and think are normal that are easily adjusted and fixed.
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Old September 10th, 2014, 01:43 PM
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adjusting the wiper boxes is as simple as bending a tab of metal to hold the cable sheath closer to the gear wheel.
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  #8  
Old September 10th, 2014, 02:23 PM
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also, fresh grease replacing the paste that is undoubtedly in there helps a lot too.
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Old September 10th, 2014, 02:26 PM
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ok, will do when I can disassemble the dash again. thanks for the feedback!
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  #10  
Old September 10th, 2014, 02:26 PM
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Worst case, you pull the arms off and spin the box gear 180 degrees to get them working on an unused part of the gear. But tighten and grease and see how it goes.
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  #11  
Old September 10th, 2014, 04:43 PM
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I thought ECR posted something a while ago how to retrofit TD5 wiper boxes to the round hole wiper bulkheads. Iirc they said it made a big difference.
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Old September 10th, 2014, 06:49 PM
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What are you guys using to lubricate the wheel boxes and cable? The lubricant that LR specifies is not made anymore as far as I know. I used Sil-Glyde from NAPA on the last wheel box and cable I did. Not sure if it was the correct thing, but the packaging said it was good for sunroof cables, which look about the same as a wiper cable in a Defender.
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  #13  
Old September 10th, 2014, 07:15 PM
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Quote:
Originally Posted by don View Post
I thought ECR posted something a while ago how to retrofit TD5 wiper boxes to the round hole wiper bulkheads. Iirc they said it made a big difference.
They said it makes very little difference
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  #14  
Old September 10th, 2014, 09:31 PM
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Quote:
Originally Posted by leastonce View Post
They said it makes very little difference
I must have misread one of his posts - could have sworn he said they were a worth while upgrade on one thread/post.

Here is an ECR post about wipers:

http://www.defendersource.com/forum/...05&postcount=4
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