How to Repair a Broken Collated Screw Gun

What You'll Need
Replacements (batteries, chuck, wiring, etc.)
Soft cloth

A collated screw gun is an excellent device that can come in handy for a lot of repairs around the house. However, like all other electrical appliances and equipment, a screw gun could also break down. The accumulation of grime, dust and dirt into the head are some of the most common causes of a screw gun breakdown. Another reason the gun may break down is when there is a failure of the connections on the armature, preventing proper activation. If the copper connections do not conduct, the screw gun does not get started. Here’s how to fix a broken collated screw gun.

Step 1 – Troubleshooting

First, run the gun and try to find out the exact problem. If the gun is not working, it may be in need of new batteries. Check the batteries once and replace them. See if the gun runs now. If the screwdriver is not working properly, it could be because something is stuck inside. The chuck may need to be replaced to correct this. You can refer to the manual of the gun before you try working it to find out the exact problem. Remove all the electric connections to the screw gun. Unplug the power cord.

Step 2 – Opening the Casing

To begin the repair, first open up the gun. Loosen the screws that are holding the encasing intact. Be gentle with the screwdriver and lift the casing off. Replace the chuck of the screwdriver with another one of the same model. Attach the new chuck properly.

Step 3 – Cleaning the Connections

The copper connections may get coated with dust and grime over a period of time. To clean the copper contacts, use a small piece of sandpaper. Sand the connections till they become smooth and shiny. Then remove the stray copper fillings, grime and dust. Use a soft cloth to clean other visible parts of the gun.

Step 4 – Inspect the Wiring

You will need to inspect each of the wires using an ohmmeter, to make sure that they are able to pass current. Before you remove the wires, it is important to first make a wiring diagram. Most user manuals will have a wiring diagram given in it; however, if it isn’t already given, make the diagram before you remove the wiring. Attach each set of wiring to the ohmmeter and check for any bad or faulty wiring by passing current through them. If there are any damaged, burnt or faulty wirings, replace them with new ones. Assemble the rest of the wires, using the wire diagram that you have created. Assemble these in the exact manner that they were assembled earlier, or they will not run properly.

Step 5 – Final Checks

Give the gun a quick scan and locate all the points that may be locked or jammed. If you are able to locate any jams, try to dislodge the obstructions. If you need to replace any of the parts that are not working, always make sure that you buy parts only from the manufacturer of your gun and that the parts are compatible with the model you are using.