Husqvarna 440 E Series Chainsaw Manual

The Husqvarna 440 E Series is a professional-grade chainsaw designed for demanding forestry and arborist work. It features a powerful X-Torq® engine for reduced emissions and fuel consumption, an inertia-activated chain brake for enhanced safety, LowVib® anti-vibration system, Air Injection™ air cleaning system, combined choke/stop control, and Smart Start® for easy starting. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: X-Torq® engine, inertia-activated chain brake, LowVib® system, Air Injection™, combined choke/stop control, Smart Start®, side-mounted chain tensioner, and transparent fuel tank.

Safety Instructions

Read and understand all safety warnings before operation.

1. Personal Protective Equipment (PPE): Always wear chainsaw protective pants, safety helmet with visor and hearing protection, gloves, and steel-toed boots.
2. Work Area Safety: Keep bystanders and animals at least 15 meters away. Ensure secure footing.
3. Kickback Danger Zone: Avoid contact with the upper quadrant of the guide bar tip.
4. Fuel Safety: Refuel outdoors only when engine is cool. Use fuel mix ratio 50:1 (Husqvarna 2-stroke oil).
5. Chain Brake Test: Test function before each use by engaging brake with left hand.

WARNING! Failure to follow safety instructions can result in serious injury or death. Never operate a chainsaw when fatigued or under the influence.

Assembly & Preparation

Unpack and inspect contents. Assemble on a clean, flat surface.

1. Attach Guide Bar & Chain: Place bar on mounting studs. Fit chain with cutting teeth facing forward on top of bar. Adjust tension with side screw.
2. Fill Fuel & Oil: Fill fuel tank with 50:1 gasoline/oil mix. Fill chain oil tank with Husqvarna chain oil (or equivalent).
3. Check Chain Tension: Chain should be snug against bar but pull freely by hand. Re-tension after initial use.
4. Check Chain Brake: Engage and disengage brake to ensure proper function.

CAUTION! Always wear protective gloves when handling the chain. Ensure chain is properly installed to prevent derailment.

Technical Specifications

• Engine Type: Husqvarna 2-stroke X-Torq®
• Displacement: 40.9 cc
• Power Output: 2.4 kW / 3.2 hp
• Fuel Tank Volume: 0.5 L
• Oil Tank Volume: 0.26 L
• Recommended Bar Length: 40 cm (16") - 45 cm (18")
• Chain Pitch/Gauge: 3/8" LP / 1.3 mm (0.050")
• Weight (excl. cutting equipment): 4.9 kg
• Sound Pressure Level: 106 dB(A)
• Vibration Level (front/rear handle): 3.2/2.8 m/s²

Controls and Components

Main controls located on top and rear handle.

Right Side: Throttle trigger, throttle trigger lockout, front hand guard/chain brake, choke/stop control, primer bulb (if equipped).

Left Side: Combined choke/stop control, decompression valve (if equipped), side-mounted chain tensioner.

Rear Handle: Master control lever (choke/fast idle/run), rear hand guard, vibration dampeners.

Maintenance Points: Air filter cover, spark plug, cylinder cover, fuel and oil caps.

Starting & Stopping

Cold Start Procedure:

1. Place saw on flat ground. Engage chain brake.
2. Press decompression valve (if equipped).
3. Set master control lever to choke position (full down).
4. Press primer bulb 6-8 times until fuel is visible (if equipped).
5. Pull starter handle until engine fires (approx. 3-5 pulls).
6. Move master control lever to fast idle position (one click up).
7. Pull starter handle again until engine starts.
8. Blip throttle to disengage fast idle.

Warm Start: Set master control lever to fast idle position and pull starter cord.

Stopping: Release throttle, allow engine to idle, move master control lever to stop position.

Operating Instructions

Proper cutting techniques for safety and efficiency.

1. Basic Stance: Stand with feet shoulder-width apart, left foot slightly forward. Hold saw firmly with both hands.
2. Kickback Prevention: Maintain secure grip. Never cut with bar tip. Keep saw at waist level or below.
3. Felling Trees: Plan escape path. Make notch cut (1/3 tree diameter), then felling cut. Use wedges for large trees.
4. Limbing: Work from trunk outward. Support saw on trunk when possible.
5. Bucking: Support log properly. Cut from top side when possible. Beware of tension/compression in wood.
6. Pushing/ Pulling Chain: Recognize when chain is pushing or pulling; adjust cutting pressure accordingly.

WARNING! Never operate chainsaw above shoulder height or with one hand. Always plan your cut and escape route.

Maintenance Schedule

Chain & Bar Care

1. Sharpening: Use correct round file size (4.0 mm / 5/32"). Maintain 30° filing angle. File all cutters evenly.
2. Depth Gauge Setting: Check depth gauges after 3-5 sharpenings. Use depth gauge tool to maintain 0.65 mm clearance.
3. Bar Maintenance: Clean bar groove weekly. Flip bar weekly for even wear. Dress bar rails with flat file if burred.
4. Chain Tension: Check when cold. Proper tension: snug against bar but pull freely. Re-check after first minute of operation.
5. Lubrication: Always use proper chain oil. Check oil flow by pointing bar at light surface; should show oil line.

CAUTION! A dull chain increases kickback risk and operator fatigue. Always stop engine before adjusting chain.

Storage Guidelines

Proper storage prevents fuel system issues and corrosion.

1. Short-Term (1-2 months): Add fuel stabilizer, run engine 2 minutes to circulate. Store in dry place.
2. Long-Term: Drain fuel tank and carburetor. Run engine until it stops. Remove chain, clean and oil it. Store chain in oil.
3. General: Clean entire saw. Check for loose parts. Cover to prevent dust accumulation.
4. Battery (if electric start): Remove battery, store at room temperature, charge every 3 months.

WARNING! Never store chainsaw with fuel in tank in enclosed area or near ignition sources.

Troubleshooting

Service: For repairs beyond basic maintenance, contact authorized Husqvarna service dealer.

Support: Husqvarna AB, SE-561 82 Huskvarna, Sweden. www.husqvarna.com