Preparation:
- Shut off the engine: Ensure that the chainsaw is powered off and disconnect the spark plug wire.
- Use protective gear: Wear gloves and safety glasses to protect yourself during the process.
Step 1: Remove the Old Chain:
- Slacken the chain tension: Loosen the chain tension adjustment mechanism and remove the side cover.
- Pull the old chain off: While holding the guide bar, pull the old chain off the guide bar and sprocket.
Step 2: Prepare the New Chain:
- Match chain size: Ensure that the new chain matches the size and pitch of your chainsaw's guide bar.
- Determine cutting direction: Identify the cutting direction of the new chain and ensure it matches your saw's specified rotation direction.
Step 3: Install the New Chain:
- Loop the chain around the sprocket: Start by looping the new chain around the engine sprocket, ensuring proper alignment of the chain teeth with the sprocket grooves.
- Thread the chain through the bar: Carefully thread the chain between the guide bar and around the tip of the bar, ensuring that it fits snugly.
- Insert into tensioner slot: Continue looping the chain until you reach the tensioner slot on the guide bar. Ensure the tensioning pin aligns with a chain drive link.
Step 4: Tension the Chain:
- Adjust tension: Use a screwdriver or the chain tension adjustment tool provided with your chainsaw to tighten the chain tension.
- Check fit: When properly tensioned, the chain should be snug against the guide bar but still move freely by hand.
Step 5: Secure the Chain and Cover:
- Lock the tensioner: Tighten the tensioner adjustment mechanism to secure the chain tension.
- Reattach the side cover: Replace the side cover and secure it properly.
Step 6: Test the Chain:
- Check alignment: Ensure the chain is aligned properly with the guide bar and sprocket.
- Run the saw: Briefly start the chainsaw to test the chain movement. Adjust tension further if necessary.
Note:
- Make sure to follow the specific instructions provided in your McCulloch chainsaw's user manual for your model.
- Properly tensioned chain contributes to the chainsaw's performance and safety.
- If you're uncomfortable performing this task, consider taking the saw to a professional repair center.
