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For added versatility the switch may be locked in its full on position and tool speed changed b means of the speed control wheel alone (see Figure 3). Figure 2 Figures Speed Control Wheel Cont’d (6138 only) The electronic speed control not only lets you select the speed to suit the job, but also helps to maintain that speed as you load the tool by pressing down. It’s this feature, coupled with the variable speed switch, that make this tool such a value. The speed control wheel can be set for any speed between 1000 and 3000 RPM and the variable speed switch will then control tool speed from zero to the wheel setting. For example: A control wheel setting of 2200 RPM will allow the variable speed switch to operate the tool between zero and 2200 RPM, depending on how far the trigger is depressed. A wheel setting of 1000 RPM would allow the switch to operate the tool from zero RPM to 1000 RPM. The electronic speed control feature comes into play whenever the trigger switch is fully depressed and the tool is running at the selected speed determined by the setting of the control wheel. As you load the tool by pushing it down on the work surface, (with the trigger fully depressed) the electronic circuit inside the tool will compensate for the loading and maintain the selected speed. If the speed selected by the control wheel is 2200 RPM, as in the example above, the tool will maintain 2200 RPM, as it is loaded. It is important to remember two things about electronic speed control: 1. The electronic speed control operates only when the trigger switch is fully depressed. 2. The effect of electronic speed control is much easier to observe at lower speed settings (2600 RPM and below), than at high speeds. As the tool approaches 3000 RPM, the effect is considerably less dramatic. Keep in mind that, with a conventional polisher running at a typical no load speed of 2400 RPM, the tool slows down to about 2000 RPM under a polishing load. Your 6138 will continue to run at 2400 RPM (or any speed you select with the control wheel) as a load is applied. Since it doesn’t slow down, the speed may be greater than you’re used to so some extra caution should be observed until you get the “feel” of your polisher. If you feel the speed is too great, you can, of course slow the tool down with either the trigger switch or the control wheel. Spindle Lock Button TURN OFF TOOL AND DISCONNECT FROM POWER SUPPLY. (See Figure 1) In order to prevent the spindle of the tool from rotating while installing or removing accessories, a spindle lock button has been provided in the gear head of the machine. To lock the spindle, depress and hold the lock button. NEVER DEPRESS THE SPINDLE LOCK BUTTON WITH THE TOOL RUNNING OR COASTING. Attaching and Removing Polishing Pads (Figures 4 & 5) TURN OFF TOOL AND DISCONNECT FROM POWER SUPPLY. To attach pad, push the hub of the clamp washer through the hole in the center of the polishing pad as far as it will go. Engage the hexagonal hole in the backing pad. Holding the three pieces firmly together, place the assembly on the tool spindle. Hold the spindle lock button while turning the pads clockwise to thread them completely on the spindle. To remove the pads, turn them by hand in the opposite direction from normal rotation to allow lock button to engage spindle, then unscrew pads in normal direction for right hand thread. NOTE: If you are using a polishing bonnet, rather than a pad, put clamp washer on first, pull bonnet completely over backing pad and pull draw strings tight Tie bow knot and push knot and all loose string completely under the inside, cloth edge of the polishing bonnet. Figure 4 CLAMP WASHER POLISHING BONNET BACKING PAD POLISHING BONN Figure 5 SPINDLE WARNING: TIED KNOT AND ALL STRINGS MUST BE TUCKED ENTIRELY UNDER THE CLOTH APRON. FAILURE TO DO SO MAY CAUSE SERIOUS INJURY. Polishing These instructions and suggestions are intended to familiarize new operators in overall general operation of power polishing. You will develop your own techniques which will make the job easier and faster as you learn power polishing. You should use utmost care when power polishing around or over sharp objects and contours of the car body. It is very important to use the correct pressure while polishing various sections of an automobile body. For example, light pressure should be applied when polishing over sharp edges of body panels, or over edges of the rain gutter along the top. Since everyone does not use the same type of power polish, we recommend you clean and polish a test section on a flat area of the car first. From this test section, you can judge the strength or cleaning action of your power polish. Remember, all power polish is not the same. Different brands will react differently on various painted surfaces. Also, you are now using a power polisher with power polish. This is entirely different from any hand application which you may have done before. Wash the car before...

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