Husqvarna H455RII Parts Manual

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Year 2018

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Husqvarna H455RII Chainsaw Specification

The Husqvarna H455RII Chainsaw is a robust and versatile tool designed for demanding cutting tasks in both professional and domestic settings. It features a powerful 55.5cc X-Torq engine, which provides high torque over a wide rpm range, enhancing performance while reducing fuel consumption and emissions. The engine's design also contributes to lower vibration levels, improving user comfort and reducing fatigue during extended use. The chainsaw is equipped with a 20-inch bar, making it suitable for felling medium to large trees and cutting firewood efficiently.

The H455RII incorporates an ergonomic design with a comfortable handle that ensures a secure grip and optimal maneuverability. Its LowVib technology minimizes vibration, further enhancing comfort and precision. The chainsaw includes an automatic chain oiler that ensures consistent lubrication for smoother operation and longer chain life. Additionally, the side-mounted chain tensioner allows for quick and easy adjustments, reducing downtime.

Safety features on the H455RII include an inertia-activated chain brake, designed to stop the chain immediately in the event of kickback, and a chain catcher that provides additional protection by preventing chain derailment. The combined choke/stop control simplifies starting and reduces the risk of engine flooding.

Maintenance is facilitated by the quick-release air filter, which allows for easy cleaning and replacement, and the transparent fuel indicator enables users to monitor fuel levels at a glance. The Husqvarna H455RII Chainsaw is an excellent choice for those requiring a reliable and efficient cutting tool that balances power, safety, and ease of use in a rugged and ergonomic package.

Husqvarna H455RII Chainsaw F.A.Q.

What is the correct fuel mixture for the Husqvarna H455RII Chainsaw?

The correct fuel mixture for the Husqvarna H455RII Chainsaw is 50:1. This means 50 parts gasoline to 1 part two-stroke oil. Ensure you use high-quality two-stroke oil to maintain engine performance and longevity.

How do I properly tension the chain on my Husqvarna H455RII Chainsaw?

To properly tension the chain, first, ensure the chainsaw is turned off and cooled down. Loosen the bar nuts slightly. Use the chain tensioning screw to adjust the tension until the chain is snug against the underside of the bar but can still be pulled around by hand. Tighten the bar nuts securely after adjustment.

What maintenance steps should be performed regularly on the Husqvarna H455RII Chainsaw?

Regular maintenance includes cleaning the air filter, checking and replacing the spark plug if necessary, inspecting the chain and guide bar, and ensuring proper chain tension. Also, clean the cooling fins and the oil channels in the bar to ensure proper lubrication.

How can I troubleshoot if my Husqvarna H455RII Chainsaw won't start?

If the chainsaw won't start, check the fuel level and quality. Ensure the spark plug is clean and properly gapped. Inspect the air filter for clogs and clean or replace it if necessary. Verify that the choke is in the correct position and that the on/off switch is set to 'on'.

What should I do if the chain on my Husqvarna H455RII Chainsaw keeps coming off?

If the chain keeps coming off, check the chain tension and adjust it as needed. Inspect the guide bar and chain for wear or damage. Ensure the chain is properly seated on the sprocket and that the bar nuts are tightened securely.

How do I replace the chain on my Husqvarna H455RII Chainsaw?

To replace the chain, turn off the chainsaw and disconnect the spark plug. Loosen the bar nuts and remove the clutch cover. Remove the old chain and fit the new chain onto the bar, ensuring the cutting direction is correct. Reattach the clutch cover and adjust chain tension before tightening the bar nuts.

What is the recommended bar length for the Husqvarna H455RII Chainsaw?

The recommended bar length for the Husqvarna H455RII Chainsaw is between 13 inches and 20 inches, depending on the type of work you are performing. Ensure that the bar length is suitable for the power output of the chainsaw.

How do I clean the air filter on my Husqvarna H455RII Chainsaw?

To clean the air filter, remove the top cover of the chainsaw. Take out the air filter and gently clean it with warm, soapy water. Rinse it thoroughly and let it dry completely before reinstalling it back into the chainsaw.

Why is my Husqvarna H455RII Chainsaw overheating?

Overheating can be caused by a clogged air filter, dull chain, or insufficient lubrication. Clean the air filter, sharpen the chain, and ensure the oil reservoir is filled with the correct chain oil. Also, check the cooling fins for debris and clean them if necessary.

What type of spark plug does the Husqvarna H455RII Chainsaw use?

The Husqvarna H455RII Chainsaw uses an NGK BPMR7A spark plug. Ensure the spark plug is properly gapped at 0.5 mm (0.020 in) for optimal performance.