I am going to try and help you out, when i got my DAM it had way too much lube on it as well. So i would start by taking the old lube and clean off and re apply new lube to it, do this the the whole bolt, I put just enough to fill the grooves where the o-rings sit. Also when screwing the two parts back together, get the tight, hand tight. This will help stop the two parts separate when unscrewing the back cap part.
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