028 AV Super Wood Boss Stihl Chainsaw Parts Manual

The Stihl 028 AV Super Wood Boss is a professional-grade chainsaw featuring anti-vibration (AV) technology, a powerful engine for demanding woodcutting tasks, and durable construction. This parts manual provides detailed diagrams, part numbers, and ordering information for maintenance, repair, and replacement of components. Below are key sections for identification, engine parts, cutting equipment, assembly instructions, and ordering.

Model Identification & Specifications

Identify your Stihl 028 AV Super Wood Boss using the serial number plate on the crankcase. Key specifications:

Engine Assembly Parts

Cylinder, piston, crankshaft, connecting rod, bearings, seals.

1. Cylinder Assembly: Includes cylinder, fins, decompression valve port.
2. Piston Assembly: Piston, rings, wrist pin, circlips.
3. Crankshaft: Main shaft with integrated crankpin.
4. Bearings & Seals: Main bearings, crank seals, O-rings.
5. Crankcase: Two halves, gasket, screws.

WARNING! Engine disassembly requires special tools. Match part numbers exactly for replacement.

Fuel System Components

Fuel tank, carburetor, fuel lines, filter, primer bulb.

1. Carburetor (Walbro or Zama): Diaphragms, gaskets, jets, adjustment screws.
2. Fuel Tank: Tank assembly, cap, vent.
3. Fuel Lines: Supply and return lines, connectors.
4. Fuel Filter: In-tank filter element.
5. Air Filter: Foam or felt element, cover.

CAUTION! Ensure fuel lines are routed correctly to prevent leaks or engine damage.

Ignition System Parts

• Ignition Module: Electronic coil, spark advance.
• Spark Plug: Bosch WSR6F or equivalent, gap 0.020" (0.5mm).
• Stop Switch: Wire harness, contact.
• Flywheel: Magnets, key, nut.
• Wiring: Kill switch wire, ground wire.

Anti-Vibration System

AV system reduces operator fatigue. Includes rubber mounts, springs, buffers.

Front AV Mounts: Rubber dampeners between engine and handlebar.

Rear AV Mounts: Additional dampeners at rear handle.

Buffer Springs: Assist in vibration isolation.

Replacement: Use genuine Stihl AV parts to maintain effectiveness and safety.

Cutting Attachment & Bar/Chain

Guide bar, saw chain, sprocket, clutch, chain brake.

1. Guide Bar: Stihl Rollomatic E or equivalent, various lengths.
2. Saw Chain: .325" pitch, .063" gauge, number of drive links varies by bar.
3. Sprocket: Rim sprocket or spur sprocket assembly.
4. Clutch: Centrifugal clutch, drum, springs.
5. Chain Brake: Band, handle, mechanism.

Tip: Always match chain pitch/gauge to bar and sprocket. Keep chain sharp and properly tensioned.

Starter Assembly

Recoil starter, rope, pulley, spring, pawls.

1. Starter Housing: Plastic cover with integrated handle.
2. Rope: Starter cord, length specific to model.
3. Spring: Recoil spring, wound in housing.
4. Pulley & Pawls: Engage with flywheel for starting.
5. Handle: Grip with rope knot.

WARNING! Recoil spring is under tension. Use caution during disassembly to prevent injury.

Crankcase & Cylinder Components

Detailed part numbers for crankcase halves, gaskets, cylinder bolts, decomp valve.

Assembly & Installation Notes

Use proper torque values. Apply sealant where specified. Follow service manual procedures.

CAUTION! Incorrect assembly can cause engine failure or unsafe operation. Consult a qualified technician if unsure.

Parts Ordering Information

Use the part number listed in diagrams. Contact an authorized Stihl dealer or visit www.stihlusa.com. Provide model and serial number. Copyright © STIHL. All parts subject to change.

Troubleshooting & Maintenance

Regular Maintenance: Clean air filter, sharpen chain, check tension, clean cooling fins.

Service: Authorized Stihl dealers only. Use genuine Stihl parts.