How To Repair A Milwaukee Core Drill

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Drills and other power tools can brand a task go easier and more than chop-chop, but damaged tools can be dangerous to use. Repairing a ability string on a bones electric drill can extend the life of the tool and make it much safer to utilise.

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1
Decide the damage to your tool. The tool in the illustrations has damage acquired by misuse or poor tool maintenance, but the problem isn't always this obvious. You can take the following steps to effort to make up one's mind where the trouble is with your drill:
- Brand sure the drill is plugged into a receptacle that has the right voltage. You lot might plug a similar tool into the same receptacle to exam the power, and if the alternate tool works, you can continue.
- Audit the tool and its ability string. Most drills are double insulated, then if you run into burnt connectors on the plug, or one is missing, you can presume that this might be causing the problem. Look for damaged insulation or other signs of a problem every bit well.
- Smell the drill'southward motor where the vents are visible. If the internal parts take overheated, there will be a singled-out odor of burnt plastic.
- Concord the trigger in the "on" position and tap the drill lightly, making sure the chuck is in a safe position. Loose wires and bad brushes sometimes will permit the drill to run intermittently when you tap the drill.
2
Brand sure that the drill is disconnected from any power source. Remove the drill'south switch cover so you tin test the wires and motor after you have completed the previous steps. If you have already adamant the cord is damaged, you tin probably skip the testing steps and proceed with repairs.
- Exam the drill's power cord for continuity with an ohmmeter to determine if the conductors are cleaved. This tin can be done by connecting the test leads to the prong on each side and the last at the drill's switch.
- If you read continuity on each wire, you lot can test the switch itself. Clasp the trigger while contacting the terminals on each side to come across if the circuit through the switch is making a connectedness.
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iii

Remove the terminal wires from the switch afterwards you lot have determined the problem with the tool is in the ability cord. Many drills (and other tools) take screw blazon connections at the switch; these are removed by but loosening the screws and removing the wires. For stabbed in connections, you might insert a small diameter precipitous musical instrument next to the wire to depress the locking tag that secures the wire, then pull the wire free from the connector.
iv

Remove the clamp that secures the ability cord to the drill motor housing (this is a stress relief clench that protects the internal connection).
v

Pull the cord out of the drill housing, and remove the factor boot, or cord protector from it. If the power cord has obvious impairment near the drill, you may be able to cutting the damaged section from the cord and reuse information technology, although information technology volition be essentially shorter than when it was new.
half-dozen

Find a replacement power cord for the drill. If your drill is double insulated, you need to replace the string with a two-wire cord the aforementioned size every bit the original; if it is grounded, use a three-wire, three pronged string for a replacement. Practice non utilise a two wire cord for a grounded tool.
7

Strip the insulation jacket off of about three to 5 inches (7.v-12.5cm) of the replacement cord, then strip the conductor insulation back near 3/4 inch (2cm), being careful not to nick or impairment the wire strands.
8

Slide the string boot onto the new string, letting it sideslip downward several inches from the stripped insulation jacket.
9

Insert the wires into the holes (or clamp them onto the terminals) where the sometime ones were removed, making sure the same colored wires keep the same terminals. Tighten the clamps/screws tightly if applicative.
10

Re-install the cord clamp and tighten it securely, then skid the cord boot into its slot. Replace the drill switch cover, tightening all of its fasteners snugly.
11

Test the drill to brand sure it runs. If it fails to operate, you may find you need to supplant the switch or the brushes, only otherwise, you volition need to replace the drill.

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Question

How do I replace brushes on a drill power cord?

Brushes are inside the motor, not the cord. On some ability tools, there appear to exist big screws 180 degrees apart on either side of the trunk of the tool. These can exist removed to supervene upon the brushes.

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Save cords, switches, and chucks from hopelessly damaged drills or other tools if they are nonetheless serviceable.
Tin the wires with rosin core solder to make a better connection if desired.
Clean the internal parts of the drill and re-grease the gears and bearings if needed while the drill is disassembled.

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Never concur or lift a power tool by its power cord.
Utilise the same size and blazon cord when replacing a power tool cord.
Go along power tools make clean and dry out.
Make sure the tool is unplugged before servicing internal electric parts.

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Things You lot'll Need

Screwdriver
Replacement string (if needed)
Ohmmeter or Multimeter
Precipitous pocketknife or stripping pliers

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