PREVENTATIVE MAINTENANCE: To ensure your drill continues to run at peak efficiency, monitor four main areas. One, check the lubrication. Since drills use oil, it's important to check and fill the oil reservoir with rock drill oil as frequently as once or twice per day — depending on workload and the model. Second, pay attention to the trunion bolts, which secure the latch that holds the bit in the drill. Improper use can cause these to break. Third, check the machine's other bolts and parts since the hammering motion of the drill may shake parts loose. Finally, watch for part wear. Eventually, the pawl, pawl springs and air tube could need replacement.

WINTERIZING PROCEDURES: Whenever the drill will be out of use for a while, such as during the winter season, prep it properly for storage. Begin by pouring a small amount of rock drill oil directly into the motor and then running it at half-throttle to ensure all parts are well-lubricated. This will help prevent rust. Next, drain condensation from the machine's filters, and then cover the unit with a tarp if it will be stored outside.

RETURNING TO SERVICE: Bring your machine back into service by starting with a few basic checks: oil level, bolt tightness and tire pressure. Next, blow out the hose that runs between the compressor and drill to ensure it's clean. Reconnect everything, and you're ready to go.