I have DeWalt grinder. When grinding, I noticed there was an exposed tear on electric cord, I went ahead replaced with new one. After, the grinder won't turn on. Also, there was a couple of times where it would turn off, when in use.
What is it that I missed or what should be the next step?
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Check your power cord. Turn the grinder on, then pull and twist the power cord, especially by the boot coming out of the grinder. If there's a break in the line, it's possible for it to work in some positions but it will die if you change the orientation of the cord to the tool.
Same thing happened to me about 1 year ago. I took the machine apart and determined the issue to be in the circuit board. I bypassed the board and wired the power cord directly to the motor. The machine began to work and is still operating fine. The only drawback, of course - having bypassed the circuit board and switch, you now are on full manual operation. Plug the power cord into the wall outlet and the motor spins; when you are finished grinding you have to remove the cord from the power source to stop the motor. I am OK with this - beats 35 - 50 dollars for a new grinder. Dave
Yes, the wobble can be fixed. First, remove both wheels and check the shaft bearings/bushings for wear. Make certain the grinder is unplugged and mounted securely. Try moving the shafts up, down side to side; there should be little or no noticeable movement. If there is movement it is a major(time and money) problem. I'm not familiar with what the shafts ride on. It could be, ball bearings(the best-long lasting, least friction, most accurate, but expensive), sealed bearings(almost as good as ball bearings, with many of the same attributes) and bushings(least expensive to produce and fit and cause the most friction. If excessive up,down side to side movement is present a decision must be made as to how much money/time you want to invest. If the shaft exhibit little movement; check if the shaft is running true/straight. Turn the grinder by hand while observing the shaft for bends. If none are seen by eye use a magnetic base micrometer to check run out(deviation from straight). If a micrometer isn't available; bend a short length of wire(coat hanger works nicely) with a small hook on one end and then put a pointer end on the other. Put a screw thought the end with the hook to mount it to the base of the grinder. Then bend the pointed end so it just touches the shaft. Rotate the shaft and notice if the distance changes between the point of the wire and the grinder shaft. Repeat for the other side. A couple of thousands won't hurt. However, any more and the cost effectiveness of tearing the grinder apart straightening the shaft must be considered. The most common cause of grinding wheel wobble is the wheels becoming out of true and/or unbalanced. This is easily cured with a wheel dressiing tool. The tool grinds the wheels in place. By gringing the wheels on the grinder they balance the wheel, true the wheel to the shaft and clean it of imbeded soft materials, aluminum, wood and so forth.
take the handle screws out and there will be 2 screws on the trigger holding 2 wires in and 2 screws holding a bracket to keep the wire from being pulled out. replace it with a new cord and 2 new connectors. the wire is a 14-2 and you will need about 4' of it. when putting a new plug-in on the end put the black wire to the brass side and the white wire to the chrome side.
Easiest way to set the grind on the super jolly is to remove the beans, turn towards fine until you can barely move the middle stem in the grind chamber, then turn towards course about 12-14 notches on the grinding adjuster(not numbers but notches between numbers). If you still cannot get a fine grind and it is not a brand new grinder replace burrs.
to do this: remove the 2 small covers on the left and right side of the tool and push aside the coil spring holding in the brush. the brush should freely pull out of the holder.
when you have the covers off, look for charring or melting. and after the brushes are out, rotate the arbor to move the armature inside and look to make sure it's not charred.
if that doesnt help, take apart the handle and look for melted or exposed wire. dewalt likes to pack the wires in tight among the screws and sometimes the normal vibration of the tool will cause a screw to cut into a wire and short the wire.
new brushes and holders (if melted) are usually around 20 dollars US