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Old 10-15-2012, 04:25 AM   #51 (permalink)
cobyrne
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Join Date: Feb 2008
Location: Dunedin, NZ

Assuming the pump arm is correctly seated in the bolt and the internals aren't binding - you might check that the nut on the pump arm (which is missing in the photos you posted so far) is snug against the pump handle and that the pump arm can only move slightly side-to-side in the slot in the grip frame (ie it's not the pump arm binding).

The pump arm nut, when tightened against the pump handle, prevents rolling of the pump handle and keeps the pump arm moving in a straighter (and smoother) line.
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