Possibilities, 1. the bolts were inserted with the side hole either directly north or south thus allowing the weight of the trailer pressing against the spring to dam up the hole, 2. the grease zerk itself has trash in it from the mfg. process. I would remove one of the zerks first and clean it out (parts cleaner) and insert it into your grease gun to make sure it works first before screwing it back into the bolt. If it works while out, but not after you install, then you would need to pull the bolts. Sorry bout that.
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Daniel & Donna Leonard
Kernersville, NC
2011 Ram 4500 SLT 4x4
2005 PF36SK
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