How to Repair a Chainsaw

What You'll Need
Screwdriver or Rivet Punch
Chain Sharpener
Chainsaw Chain Mender
Mineral Spirits or Other Degreasing Agent
Chain Lubricant
Protective Gloves

In order to repair chainsaw chains, first determine if you should repair the chainsaw or replace it. Some models of chainsaws recommend completely replacing the chain instead of repairing it.

Chainsaws are used for all kinds of removal of brush and trees from properties. Smaller chainsaw models are used for cutting up small bushes and branches, while larger heavy duty chainsaws are used to thin and remove larger more substantial trees from properties or roads.

Proper maintenance of you chainsaw will prevent unnecessary damage to the entire chainsaw and dangerous accidents from occurring. On a regular basis, check all of the screws around the bar and around the finger guard. Also inspect the kickback protection bar. Also regularly check to make sure that the bar and chain are lubricated. Finally, double check the fuel filter regularly to make sure there are no fuel leaks. If the chainsaw is electric, inspect the electrical cable and connectors for wear and tear, including any damage to the cable insulating covering.

Step 1 – Remove Old Chain

Wearing protective gloves, remove the old chain. Locate the chain protective bar by unscrewing it from the chainsaw body housing. Carefully remove the chain.

Some chainsaws have a master chain that must be removed first before you can remove any other supporting chains. If there is a master chain, locate the screws that secure it into place and remove these first. Set the screws aside where they will not be lost.

If there is no master chain, then choose the chain to be removed and pull it free from the chainsaw body.

Step 2 – Sharpen Chain

If the chain needs to be sharpened, then use the chainsaw chain sharpener. Carefully hold the chain using protective gloves, since the edges will be extremely sharp.

Degrease the chain with mineral spirits or other degreasing agent.

Choose a tooth in the chain to begin. Place the file in front of that tooth and lift the file so that it is at a 25 degree angle. Run the file across the surface of the tooth 2 to 4 times. Do this for each blade, both in the direction facing you and in the opposite direction. Repeat this process for each tooth in the chain.

Step 3 – Remove Additional Chains/Adjust Links

Remove additional chains from the body housing with a screwdriver or rivet punch. If the chain is stretched, then you will need to adjust the links in the chain to pull it back to size. Alternatively, replace any damaged links in the chain.

Step 4 – Replace Repaired Chain

Place sharpened or repaired chain back on the chainsaw body housing, aligning the saw links with the saw bar. Thoroughly lubricate all of the chains so that they will slide easily on the bar.

Carefully set the chain in place, adjusting the tension as needed. Replace the screws holding the safety bar in place and tighten the bar.