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Old 08-15-2010, 04:09 PM   #6 (permalink)
CCM Pumps
Join Date: Mar 2010
Location: Igo (near Redding) CA

Like said above - clean the bottom tube. my S5 did the same thing. Per CCM tech oil (not lube) on the valve o-ring and piston and nothing (dry) on the hammer. When i cleaned mine it fixed my +/- 25 problem to +/- 3. It could be that the reg. was over lubed and it got to the valve or hammer.
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