I take apart and put together a Park Tool PFP-3 bike floor pump and show where the various o-rings are that might cause problems. I also show how to lubricate it. I include Park Tool part numbers for various parts. The Park Tool PFP-6 is pretty much the same as the PFP-3 with mostly the same parts. It will probably be cheaper to fi the old pump than to buy a new one. It just may need a new o-ring or some silicone grease.
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