In the post above I offered to send people the engineering drawings for the roof supports for running the Gr8Tops Safari Cab without the sides and the first person that contacted me didn't ask me about that, they asked me about adding a wiper to their Safari Cab. Unfortunately that's another feature Gr8Tops decided not to include in the product. So I'll provide the wiper info here...
The motor I used is from AM Equipment, it's their 212-series motor:
https://www.amequipment.com/shop/212-series-dc-gear-motor-assembly-and-208-replacement-3a2kl/, specs are 12v, 100-degree sweep, 25mm shaft. The wiper blade is 13", and the geometry looks like this:
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For my Jeep, I used some Trico parts to make a custom wiper arm. Before Gr8Tops decided not to offer the wiper as an option, I was working with the AM Equipment on a custom arm for this application, it's in the photo below. I didn't go any further with AM Equipment when Gr8Tops decided not to offer the wiper option so if someone wants to put a wiper in their Safari Cab rear door, they'll need to work up a custom wiper arm like I did. The dimensions and bend angle are shown in the drawing above, it's not really that hard to make.
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The wiper motor goes inside the bottom cavity of the barn door as shown in the diagram above and the photo below; the photo is a work-in-progress photo taken as I was installing the motor. One thing not shown in the photo below is the cavity cover, that was a separate piece molded in fiberglass so that's something that would need to be made if someone wants to do this project.
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