The expensive wiper arms must be "torqued" per spec's. Then about 30 min or so retorqued. By doing so it "presses" the arm onto a splined cone shaft on the motor home. For the most part, once the arm is pressed on, if it is removed it must be replaced. The arm is pretty much a one time use thing. Once it "flys off" it will never stay on again. Mine did the same but also the sweep was way to much. The factory finally modified the linkage under the hood and GOT EVERYTHING FIXED for the first time in 2 1/2 years. it is a common problem,but no recall. Just stay after them.
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Howard & Connie. USAF Retired
2007 Newmar KSDP tow Jeep 4dr wrangler
member of IRV2since 2003
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