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The LN IMS Retrofit - it's dual and single row IMS bearing designs - was created in 2009.
I believe that LN considers its dual row bearing a permanent fix. With zero dual row failures, they may be right.
On the other hand, LN recommends owners treat its 1st generation single row bearing as a maintenance item because its load carrying is far less than its dual row counterpart. The maintenance interval is 50,000 miles or every four years. That said, LN single row bearings may last far longer.
LN introduced its Gen 2 Pro bearing at the beginning of this year to eliminate the single row Retrofit's load carrying concern.
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Threaded Mode
