Fill the reservoir with air tool oil or 10W equivalent for 9 lb and 15 lb class. Use rock drill oil for the 38 lb and 60 lb class tools. Check all nuts and bolts to ensure they are tight on the tool. Make sure retainer locks into place. Replace retainer and springs if worn.
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[pdf] There are many different types of drill bits, each designed for a specific purpose. However, the main factor determining which drill bit to use on rock is the hardness of the material. The harder the rock, t.
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