Many times when pumping grease into a grease fitting the joint won't accept the grease. Usually the problem is a clogged fitting, but changing the fitting doesn't always work if the grease in the joint has become hard or contaminated. Now with the Grease Fitting Cleaner from Innovative Products of America you can force a light oil into the joint loosing up the old, hard grease and allowing new grease to be pushed in.
