How to Change a Chainsaw Chain: Quick Guide

Can you change a chainsaw chain yourself? Yes, you can change a chainsaw chain yourself with the right tools and a little guidance. This guide will walk you through the simple steps of chainsaw chain replacement, making chainsaw maintenance chain a breeze. Whether you’re dealing with a dull chain or switching to a different type for a specific job, replacing a chainsaw chain is a fundamental skill for any chainsaw owner. We’ll cover everything from chainsaw chain removal to new chainsaw chain installation, ensuring you know exactly how to put a new chainsaw chain on.

Preparing for Your Chainsaw Chain Swap

Before you dive into changing the chainsaw bar and chain, it’s crucial to gather the necessary items. Having everything ready will make the process smooth and efficient. Think of this as your pre-flight checklist for a successful chain change.

Essential Tools and Supplies

Here’s what you’ll need to have on hand:

New Chainsaw Chain: Ensure it’s the correct gauge, pitch, and has the right number of drive links for your chainsaw model. If you’re unsure, check your chainsaw’s manual or the side of the old chain.
Chainsaw File (Round): The size of the file should match the pitch of your chain.
File Guide or Depth Gauge Tool: This helps ensure consistent depth-gauge setting.
Combination Scrench or Socket Wrench: This is your primary tool for loosening and tightening bar nuts and the chain tensioning screw.
Gloves: Heavy-duty work gloves will protect your hands from sharp chain teeth and potential cuts.
Safety Glasses or Goggles: Essential eye protection.
Work Rags: For wiping away debris and oil.
Owner’s Manual: Always a good reference for specific details about your chainsaw model.
Optional: Chain Brake Cleaner: To clean the brake components if needed.

Identifying Your Chainsaw Chain Specifications

Getting the right replacement chain is paramount. A chain that’s too large or too small won’t fit or work correctly, and could be dangerous. You need to know three key things about your current chain:

Pitch: This is the distance between the drive links, measured from the first rivet to the third rivet, then divided by two. Common pitches are .325″, 3/8″, and .404″.
Gauge (or Drive Link Thickness): This is the thickness of the drive links that fit into the bar groove. Common gauges are .050″, .058″, and .063″.
Number of Drive Links: This is the count of the drive links on the bottom of the chain.

You can usually find this information stamped on the chain itself, often on the drive links or the cutter links. Alternatively, your chainsaw’s manual will specify the correct chain specifications.

Step-by-Step Guide to Chainsaw Chain Removal

Now that you’re prepared, let’s get started with chainsaw chain removal. This is the first part of replacing chainsaw chain, and it’s straightforward if you follow these steps carefully.

Safety First!

Always ensure your chainsaw is turned off and the chain brake is engaged before you begin any work. It’s also a good practice to disconnect the spark plug wire to prevent accidental starting.

Accessing the Chain and Bar

Most chainsaws have a side cover that needs to be removed to access the chain and bar. This cover is typically held in place by one or two nuts.

Loosen the Bar Nuts: Use your scrench or socket wrench to loosen the nuts holding the chain cover and bar in place. You don’t need to remove them completely yet, just loosen them enough so the cover can be removed.
Remove the Chain Cover: Gently pull off the chain cover. You might need to wiggle it a bit. Be mindful of any tension springs underneath.
Ease the Tension: To make it easier to get the old chain off, you’ll need to release the chain tension. Most chainsaws have a tensioning screw located on the side of the chainsaw body, often near the bar. Turn this screw counter-clockwise. You should see the chain loosen up.

Removing the Old Chain

With the cover off and tension released, chainsaw chain removal is simple:

Slide the Bar: Gently pull the guide bar away from the clutch drum. This will create slack in the chain.
Lift the Chain Off: Carefully lift the old chain off the guide bar and away from the clutch.
Remove the Bar (Optional but Recommended): For thorough cleaning and inspection, it’s best to remove the guide bar completely. You’ll usually find two bar nuts holding it to the chainsaw body. Undo these nuts and lift the bar off.

Installing the New Chainsaw Chain

This is where how to install a new chainsaw chain comes into play. This part of new chainsaw chain installation requires precision to ensure the chain fits correctly.

Inspecting the Bar and Sprocket

Before fitting the new chain, take a moment to inspect your guide bar and the clutch sprocket.

Guide Bar Inspection: Look for signs of wear. Check the groove for debris and clean it out. Ensure the rails are straight and not excessively worn. If the rails are uneven or the bar is damaged, it’s time for a new bar.
Sprocket Inspection: Check the clutch sprocket for worn or hooked teeth. A worn sprocket can damage your new chain quickly. If the teeth are pointed or uneven, it needs to be replaced.

How to Put a New Chainsaw Chain On

This is the core of the chainsaw chain fitting process. Follow these steps to correctly install a new chainsaw chain:

Position the Guide Bar: Place the guide bar back onto the chainsaw body, ensuring the mounting studs go through the bar’s mounting holes.
Thread the New Chain: Start by hooking the drive links of the new chain onto the clutch sprocket. Then, carefully guide the chain around the nose sprocket of the guide bar. Make sure the cutters on the chain are facing the correct direction. For most chainsaws, the cutters should be angled forward, away from you, on the top of the bar.
Engage the Chain: Pull the chain around the entire bar. The drive links should sit snugly in the bar’s groove.

Adjusting Chain Tension (Crucial Step)

Proper chainsaw chain adjustment is vital for both performance and safety. A chain that’s too loose can derail, while one that’s too tight can cause excessive wear and damage.

Initial Tensioning:
- Locate the chain tensioning screw on your chainsaw.
- Turn the screw clockwise to tighten the chain. Do this while holding the guide bar up.
- You want the chain to be snug enough that it doesn’t sag off the bar, but you should still be able to move it by hand with a bit of effort.
Check for Proper Fit:
- Pull the chain around the bar manually. It should move smoothly.
- Lift the chain from the bottom of the bar. The drive links should not be able to slide out of the bar groove.
- A good test is to pull the chain forward. It should move freely but feel taut.

Table: Chainsaw Chain Tension Check

Condition	Action Needed
Chain sags off bar	Tighten chain tension screw (clockwise).
Chain is too tight	Loosen chain tension screw (counter-clockwise).
Chain moves stiffly	Loosen slightly, ensure correct seating.
Chain moves freely, stays on bar	Correct tension achieved.

Reattaching the Chain Cover and Securing the Bar

With the chain tensioned correctly, it’s time to put everything back together.

Replace the Chain Cover: Carefully slide the chain cover back into place, making sure it aligns with the bar and the tensioning mechanism.
Snug the Bar Nuts: Begin to tighten the bar nuts. As you tighten them, you may need to make slight adjustments to the chain tension. Keep checking the chain’s tension as you go.
Final Tightening: Once the cover is on and the chain has the right tension, fully tighten the bar nuts. Ensure they are snug but avoid over-tightening, which could damage the components.

Final Checks and Testing

You’re almost there! Before you start cutting, perform a few final checks to ensure your work is safe and effective. This is the last stage of new chainsaw chain installation.

Testing the Chain Brake

The chain brake is a critical safety feature.

Engage the Brake: Push the chain brake handle forward.
Test for Engagement: Try to move the chain. It should be completely locked and not move at all.
Disengage the Brake: Pull the chain brake handle back towards you.
Test for Movement: The chain should now be able to move freely.

Running the Engine Briefly

It’s a good idea to run the engine for a short period to let the new chain settle onto the sprocket.

Start the Chainsaw: Start the engine and let it idle.
Observe the Chain: Watch the chain as it runs. It should move smoothly without any jumping or excessive noise.
Re-check Tension: After a minute or two of idling, turn the engine off. The new chain might stretch slightly as it seats. Re-check the chain tension and adjust if necessary. This is a very important step in chainsaw chain adjustment.

Changing the Chainsaw Bar and Chain Together

Sometimes, it’s beneficial to replace both the chainsaw bar and chain at the same time. This is particularly true if your bar is showing significant wear or if you’re upgrading to a different type of bar (e.g., a thinner bar for better efficiency). The process for changing chainsaw bar and chain is very similar to just changing the chain.

Remove the Old Chain and Bar: Follow steps outlined in the “Chainsaw Chain Removal” section to take off the old chain and bar.
Mount the New Bar: Place the new guide bar onto the chainsaw, ensuring it’s correctly aligned with the mounting studs.
Install the New Chain: Fit the new chain onto the new bar and around the clutch sprocket as described in the “How to Put a New Chainsaw Chain On” section.
Adjust and Secure: Proceed with chainsaw chain adjustment and secure the bar nuts and chain cover as detailed previously.

Common Issues and Troubleshooting

Even with careful work, you might encounter minor issues during chainsaw chain fitting. Here are a few common problems and their solutions.

Chain Won’t Stay Tight

Problem: The chain loosens quickly after you adjust it.
Possible Causes:
- Worn Sprocket: A worn sprocket can’t grip the chain properly.
- Incorrect Tensioning: Not tightening the bar nuts sufficiently while holding tension.
- Damaged Bar Groove: The groove in the bar might be too wide.
- Chain Stretching: New chains can stretch a bit initially.
Solutions:
- Inspect and replace the sprocket if worn.
- Ensure bar nuts are tightened while holding the bar up during tensioning.
- Check the bar groove; replace the bar if it’s excessively worn.
- Re-tension the chain after initial use.

Chain is Too Tight and Stiff

Problem: The chain is difficult to move by hand, or it binds.
Possible Causes:
- Over-Tensioning: The tensioning screw was turned too far.
- Debris in the Bar Groove: Small twigs or sawdust can impede movement.
- Chain Not Seated Properly: Drive links might not be fully in the bar groove or on the sprocket.
Solutions:
- Loosen the chain tension screw until the chain moves freely.
- Clean the bar groove thoroughly.
- Re-seat the chain, ensuring drive links are correctly positioned.

Chain Derails During Use

Problem: The chain comes off the bar while cutting.
Possible Causes:
- Loose Chain: The most common cause. Not enough tension.
- Bent or Damaged Bar: Uneven rails can cause derailing.
- Worn Sprocket: Teeth that are too sharp or hooked can contribute.
- Incorrect Chain/Bar Match: Using a chain with the wrong pitch or gauge.
Solutions:
- Increase chain tension.
- Inspect and replace the guide bar if it’s bent or damaged.
- Replace the clutch sprocket if it shows excessive wear.
- Double-check that you are using the correct chain specifications for your saw.

Maintaining Your Chainsaw Chain

Proper maintenance can extend the life of your chain and ensure optimal cutting performance. This goes beyond just knowing how to install a new chainsaw chain.

Sharpening Your Chain

A sharp chain cuts efficiently and is safer to use. Dull chains require more force, leading to fatigue and increased risk of kickback.

Frequency: Sharpen your chain when you notice a significant drop in cutting performance or when the saw starts to “dust” rather than “chip” wood.
Tool: Use the correct size round file and a file guide.
Technique: Follow the angle recommendations in your owner’s manual. Typically, this is around 25-30 degrees. File each cutter on both sides in a consistent direction.

Cleaning Your Chain and Bar

Regular cleaning prevents debris buildup that can affect performance and wear.

When: After each significant use, or at least after every few uses.
How: Use a degreaser or solvent and a stiff brush to clean the chain and the bar groove. Wipe dry with a rag.

Frequently Asked Questions (FAQ)

Q1: How often should I change my chainsaw chain?
A1: There’s no set mileage, but you should change your chain when it becomes dull and unsharpenable, or if it’s damaged (e.g., broken teeth, stretched beyond adjustment). A good rule of thumb is to replace it after it has been sharpened about 8-10 times, depending on the severity of wear each time.

Q2: What is the pitch of a chainsaw chain?
A2: The pitch is the distance between the drive links, measured from the first rivet to the third rivet, and then divided by two. It’s usually expressed in inches (e.g., .325″, 3/8″).

Q3: Can I use a different size chain on my chainsaw?
A3: No, you must use a chain with the correct pitch, gauge, and number of drive links that your chainsaw is designed for. Using the wrong size can damage your saw and be very dangerous.

Q4: How do I know when my chain is too dull to sharpen?
A4: If you can’t get a clean cut with your sharpener, or if the cutters are significantly shortened or deformed, it’s time for a new chain.

Q5: Does the chain brake need to be engaged during chain replacement?
A5: It’s best practice to engage the chain brake to prevent accidental movement of the chain and bar during the process. Also, ensure the engine is off and the spark plug wire is disconnected.

By following these comprehensive steps, you’ll be well-equipped to handle chainsaw chain replacement with confidence. Proper chainsaw maintenance chain and knowing how to install a new chainsaw chain are key to keeping your chainsaw running efficiently and safely. Remember to always prioritize safety and consult your owner’s manual for model-specific instructions.