Most of us clean the coupler and even waste the first couple pumps of grease to push out any debris before using a grease gun for the first time. Until recently, I did not pay much attention to the inside of a new grease gun. I discovered that the barrel and rubber plunger can be contaminated with dust, metal filings and other debris from the factory. (Five of five new grease guns from two different manufacturers were dirty inside.) Now I clean them before putting them in service. (Jerry Baker, Lubrication Specialist, DuPont Tate & Lyle Bioproducts)
Join us in Seattle on July 26-28 for
Oil Analysis or Machinery Lubrication training.

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