There is a time in even the highest quality of crescent wrench where the adjustable end of the tool may stop working properly, and it would be more cost efficient to simply fix it instead of spending money on an entirely new wrench. What happens here is that the teeth or gearing teeth in the wrench have become stripped or worn from excessive tork or wrenching, which causes the wrench to no longer hold its position when used. You will notice that when pressure is applied to remove a bolt, the jaw may slide or pop open and lose its grip on the work area. This can be fixed quite easily, and the hardware for this can be bought at most full scale hardware stores, used by the local professionals for their mechanic and electronic tool needs.
Step 1 - Secure the Wrench
First you will want to secure your crescent wrench into a good working bench vice so ensure that it does not move while you are working on its repair. Be sure that if you have a vice with teeth that you place wooden blocks on either side of the handle evenly to prevent it from getting marred or bitten by the vices grip. This may be important to some, who like to keep their tools neat and clean, which is a good best practice to extend the life of your equipment. Bites in the metal can over time potentially cause structural weakness in the tools functionality down the road.
Step 2 - Knock Out the Securing Pin
The adjusting wheel on your crescent wrench is simply held in by a pin that can be seen on each of its sides, one end of this pin is tapered to prevent it from slipping out and you will want the narrow hole facing up as this is the side you will be tapping loose to get the pin out. Take your mallet and tap your hole punch onto the pin lightly and you will see it starts to work its way free, once it starts to come out you may be temped to pull it out with pliers. Do not pull the pin out with pliers as the teeth of your pliers can gouge the pin making it not go back in correctly when finished, simply tap the pin out and remove the wheel from the tool.
Step 3 - Replacing the Hardware
Now that the pin and wheel are out of the crescent wrench, you will want to take it out of the vice and place it facing the other side up, being careful not to drop it jaw in the process. Line the new wheel with the threads in the wrench and use your mallet to pound the pin back into place. You have just successfully replaced the stripped wheel on your wrench, and saved an otherwise perfect tool in the process with very little time and effort. Put your new wrench to the test to ensure it holds a good grip and the job is complete.