Husqvarna 460 Chainsaw Workshop Manual

The Husqvarna 460 is a professional-grade chainsaw featuring a high-performance 3.4 HP engine, X-Torq technology for reduced emissions, Air Injection air filtration, LowVib anti-vibration system, Smart Start for easy starting, combined choke/stop control, and inertia-activated chain brake. This workshop manual provides detailed instructions for maintenance, repair, troubleshooting, and safety procedures. Below are key sections covering specifications, safety, maintenance, engine service, fuel system, ignition, cutting equipment, and troubleshooting.

Specifications & Technical Data

Key technical specifications for the Husqvarna 460 chainsaw.

Safety Information

Critical safety warnings and personal protective equipment (PPE) requirements.

1. Personal Protective Equipment: Always wear chainsaw protective trousers, safety boots, gloves, eye protection (goggles/visor), and hearing protection.
2. Before Starting: Check chain tension, chain brake function, throttle trigger lockout, and ensure all guards are in place.
3. During Operation: Maintain secure footing, keep bystanders at a safe distance, never operate above shoulder height, and be aware of kickback zone.
4. Fuel Safety: Refuel in a well-ventilated area with engine off and cool. Use fuel mix (50:1 Husqvarna XP+ oil with 90+ octane gasoline).
5. Transport & Storage: Engage chain brake when carrying. Store chainsaw in a dry place, empty fuel tank for long-term storage.

WARNING! Failure to follow safety instructions can result in serious injury or death. The chain brake is not a substitute for safe operating practices.

Maintenance Schedule

Routine maintenance tasks and intervals to ensure optimal performance and longevity.

Note: Intervals may vary based on operating conditions. More frequent maintenance is required in dusty or demanding environments.

Engine Service

Procedures for cylinder, piston, crankshaft, and bearing service.

1. Cylinder & Piston Inspection: Remove muffler to inspect piston and cylinder for scoring. Measure piston clearance (spec: 0.05-0.07 mm).
2. Decompression Valve: Test by pressing; should spring back. Replace if leaking or stuck.
3. Crankcase Seals: Check for leaks (air/fuel). Replace seals if engine runs lean or has starting issues.
4. Bearings: Check main bearings for play or roughness. Replace if defective.
5. Compression Test: Should be above 120 psi (8.3 bar) for good starting.

Tools Required: Torx screwdrivers, piston stop, flywheel puller, bearing puller, torque wrench, feeler gauges.

Fuel System

Servicing the fuel tank, lines, filter, and pump.

1. Fuel Filter Replacement: Drain tank, remove filter through filler neck using a wire hook. Install new filter.
2. Fuel Lines: Inspect for cracks or brittleness. Replace lines if leaking. Note routing diagram.
3. Fuel Tank Vent: Check vent valve (in cap) is not clogged. Clean with compressed air.
4. Fuel Pump (if equipped): Diaphragm pump on carburetor. Check diaphragm for tears or stiffness.

Fuel Mix: Use 50:1 ratio with Husqvarna XP+ 2-stroke oil. Do not use automotive oil or old gasoline.

Ignition System

Testing and replacing ignition components.

Note: Always disconnect spark plug wire before servicing ignition system.

Cutting Equipment

Guide bar, chain, sprocket, and clutch maintenance.

1. Chain Tensioning: Loosen bar nuts, adjust tensioning screw until chain snaps back when pulled from bar. Tighten nuts (torque: 9-10 Nm).
2. Bar Maintenance: Clean bar groove, flip bar weekly for even wear. File down burrs on rails.
3. Sprocket Inspection: Check drive sprocket (rim or spur) for wear. Replace if teeth are hooked or worn unevenly.
4. Clutch & Drum: Inspect clutch springs for fatigue. Clean drum bearing. Replace if grooves are deep.
5. Chain Sharpening: Use correct round file size (typically 4.0 mm or 5/32"). Maintain 30° top plate angle, 10° tilt angle.

WARNING! Always wear gloves when handling chain. A sharp chain reduces kickback risk and improves cutting efficiency.

Carburetor Adjustment

Adjusting H, L, and T screws on Zama or Walbro carburetor.

1. Initial Settings: Turn H and L screws gently clockwise until seated, then back out: L - 1 turn, H - 1 turn.
2. Idle Adjustment (T): Start engine, warm up. Adjust T screw to achieve steady idle (2700 RPM) without chain rotation.
3. Low Speed (L): Adjust for smooth acceleration from idle. If hesitant, enrich (counter-clockwise). If smoky, lean (clockwise) in 1/8 turn increments.
4. High Speed (H): Under load (cutting), adjust for maximum power without 4-stroking (lean) or excessive 4-stroking (rich). Use tachometer if possible (max 9600 RPM no-load).
5. Final Check: Chain must not rotate at idle. Engine should accelerate smoothly and return to idle quickly.

CAUTION! Incorrect adjustment can cause engine damage. H screw affects engine temperature and power. If unsure, consult a professional.

Troubleshooting

Parts List & Diagrams

Reference diagrams and common replacement part numbers.

• Cylinder Kit: 503 87 47-01
• Piston Kit: 503 87 48-01
• Carburetor (Zama): 545 00 80-02
• Ignition Module: 544 19 13-02
• Air Filter: 503 83 72-02
• Fuel Filter: 501 87 40-01
• Clutch Assembly: 537 00 43-01
• Drive Sprocket (Rim): 501 87 65-01
• Chain Brake Band: 501 84 41-01
• Anti-Vibration Mounts: Set of 4: 537 01 12-01

Note: Always verify part numbers with your local Husqvarna dealer or serial number.

Warranty & Support

Husqvarna 460 warranty terms and customer support information.

Warranty: Professional use warranty typically 1 year from date of purchase. Warranty does not cover wear items (chains, bars, spark plugs, filters) or damage from misuse, neglect, or improper fuel mix. Proof of purchase required.

Technical Support: For technical questions, repairs, or genuine parts:

• Contact your authorized Husqvarna servicing dealer.
• Husqvarna USA Customer Support: 1-800-487-5962
• Website: www.husqvarna.com/us
• Online Parts Lookup: www.husqvarnapartstore.com

Safety & Training: Husqvarna offers chainsaw safety and maintenance training courses. Contact your dealer for details.