Harbor Freight Tools 38144 User Manual - Page 10

SAFETy changing Drill Speed Before changing the speeds, make sure the machine is switched OFF and UNPLUGGED. 1. Open the pulley cover. 2. Slacken off the Belt Tension Lock Knobs (18A) on both sides of the head and turn the Belt Tension Lever (19A) clockwise, to bring the Motor Pulley (11A) closer to the Spindle Pulley (3) in order to remove all tension from the drive belts. 220 300 3. Consult Figure c (or the chart inside the pulley cover) and position the belts on the pulley's according to the spindle which corresponds to the spindle/drill speed required. 4. When the belts have been correctly positioned, tighten them by turning the Belt Tension Lever counterclockwise until the belt deflects by approximately 1/2″ at its center when using reasonable thumb pressure. Lock this position in with the two Belt Tension Lock Knobs. Note: If the belt is too long to be properly tensioned, it must be replaced. 430 480 590 650 720 850 900 950 1600 1900 2000 2500 2900 3600 M24 Left Belt Figure c: Drill Speed Table The table above shows the belt arrangements for given drill speeds (A full chart is also located on the inside of the pulley cover). Bit Installation M25 Right Belt 1. Insert the bit into the jaws of the Chuck approximately 1″, ensuring that the jaws do not touch the flutes of the bit. 2. Ensure that the bit is centered within the jaws, then use the supplied chuck key to firmly tighten the Chuck. SETUp OpERATION MAINTENANcE Page 10 For technical questions, please call 1-888-866-5797. Item 38144