Dewalt DW840 Instruction Manual - Page 6

English • The label on your tool may include the following symbols. The symbols and their definitions are as follows: V ..........volts A ..........amperes Hz hertz min ..........minutes ........direct current Class II Construction earthing terminal INTRODUCTION W ..........watts ..........alternating current no ..........no load speed ..........safety alert symbol .../min ....revolutions per minute COMPONENTS A. Trigger Switch B. Lock-On Button C. Spindle Lock Button D. Side Handle E. Guard (Type 27, open beneath wheel or accessory) C B E DA ASSEMBLY CAUTION: Turn off and unplug the tool before making any adjustments or removing or installing attachments or accessories. Before reconnecting the tool, depress and release the rear part of the switch to ensure that the tool is off. ATTACHING SIDE HANDLE The side handle can be fitted to either side of the gear case in the threaded holes, as shown. Before using the tool, check that the handle is tightened securely. ACCESSORIES It is important to choose the correct guards, backing pads and flanges to use with grinder accessories. See pages 5-6 for information on choosing the correct accessories. CAUTION: Accessories must be rated for at least the speed recommended on the tool warning label. Wheels and other accessories running over their rated speed may fly apart and cause injury. Threaded accessories must have a 5/8" - 11 hub. Every unthreaded accessory must have a 7/8" arbor hole. If it does not, it may have been designed for a circular saw. Use only the accessories shown on pages 5-6 of this manual. Accessory ratings must always be above listed tool speed as shown on tool nameplate. OPERATION Switch CAUTION: Check that the tool is not locked ON before connecting it to a power supply. If the trigger switch is locked ON when the tool is connected to the power supply, it will start immediately. Damage to your tool or personal injury may result. To start the tool, squeeze the trigger switch (A). To turn the tool off, release the switch. The tool can be locked on for continuous use by holding the trigger switch depressed while you depress the switch locking button next to the trigger. Hold the lock-on button (B) in as you gently release the trigger. Release the locking button and the tool will continue to run. To turn the tool off from a locked on condition, squeeze and release the trigger once. 4