stihl 034 av manual pdf

The STIHL 034 AV is a professional-grade gasoline-powered chainsaw featuring anti-vibration (AV) technology, a powerful engine, and a range of safety and performance features. This manual covers essential information for safe operation, maintenance, troubleshooting, and specifications to ensure optimal performance and longevity of your chainsaw. Below are key sections for safety, features, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Anti-Vibration (AV) system, Quickstop® inertia chain brake, side-access chain tensioner, decompression valve, and STIHL Oilomatic® saw chain.

Feature	Description
Anti-Vibration (AV) System	Reduces operator fatigue by dampening engine vibrations
Quickstop® Inertia Chain Brake	Automatically stops the chain in case of kickback
Side-Access Chain Tensioner	Allows easy chain adjustment without removing the side cover
Decompression Valve	Reduces pulling force required for starting
STIHL Oilomatic® Saw Chain	Self-lubricating chain for reduced wear and smoother cutting
Throttle Interlock	Prevents accidental throttle activation
Chain Catcher	Helps reduce risk if chain breaks or derails
Muffler with Spark Arrestor	Reduces noise and prevents emission of sparks
Fuel Tank	Integrated tank for gasoline/oil mixture
Oil Tank	Integrated tank for chain and bar lubrication

Safety Information

Read and understand all safety instructions before operating the chainsaw.

1. Personal Protective Equipment (PPE): Always wear safety glasses, hearing protection, gloves, chainsaw chaps, and sturdy boots.
2. Clear Work Area: Ensure no bystanders, especially children or pets, are within at least 15 feet (5 meters).
3. Kickback Zone: Be aware of the upper quadrant of the guide bar tip; avoid contact during operation.
4. Secure Workpiece: Never hold the workpiece with your leg or foot; use a sawhorse or clamp.
5. Fuel Safety: Refuel in a well-ventilated area, with engine off and cool. Wipe off any spills.

WARNING! Failure to follow safety instructions can result in serious injury or death. The chainsaw is a dangerous tool if misused.

Assembly & First-Time Setup

Unpack and inspect all components. Assemble the chainsaw before first use.

1. Attach Guide Bar and Chain: Place bar on studs, loop chain over bar with cutting edges facing forward, adjust tension with side knob.
2. Fill Fuel Tank: Use fresh fuel mix (50:1 gasoline to STIHL 2-cycle oil). Do not use automotive oil or old gasoline.
3. Fill Oil Tank: Use STIHL chain oil or equivalent for bar and chain lubrication.
4. Check Chain Brake: Pull front hand guard toward bar to engage brake; push back to disengage. Ensure it moves freely.
5. Starting Procedure: Place on ground, engage chain brake, set master control lever to cold start position, pull starter rope until engine fires.

CAUTION! Ensure chain is properly tensioned—should snap back when pulled from bar, but not bind.

Specifications

• Engine Displacement: Approximately 56.5 cc.
• Power Output: Professional-grade power for demanding cutting tasks.
• Guide Bar Lengths: Compatible with 16" to 20" bars (check model variant).
• Fuel Capacity: Approximately 0.95 US pints (450 ml).
• Oil Tank Capacity: Approximately 0.42 US pints (200 ml).
• Weight (Powerhead): Approximately 12.8 lbs (5.8 kg) without bar and chain.
• Ignition System: Electronic, breakerless.
• Chain Pitch/Gauge: Typically .325" pitch, .063" gauge (verify with your specific bar/chain).
• Sound Pressure Level: Exceeds 100 dB(A); hearing protection required.

Controls and Components

Familiarize yourself with all controls before operation.

Main Controls: Master Control Lever (Stop/Start/Throttle), Throttle Trigger, Throttle Interlock, Chain Brake Lever (Front Hand Guard), Decompression Valve Button, Choke Knob.

Components: Fuel Tank Cap, Oil Tank Cap, Muffler, Spark Plug, Air Filter Cover, Starter Grip, Rear Handle, Front Handle with Anti-Vibration Mounts, Guide Bar, Saw Chain, Chain Tensioner Knob, Chain Catcher.

Adjustments: Chain Tension (side knob), Idle Speed (carburetor screw - service only), Oil Pump Output (screw under unit - service only).

Operation Instructions

Proper technique is critical for safety and efficiency.

1. Starting: Engage chain brake. Set master control to cold start (choke on). Pull starter rope sharply until engine fires. Move control to half-throttle position, pull again to start. Disengage chain brake.
2. Cutting: Use full throttle when cutting. Let the saw do the work; do not force it. Be aware of pinch points, especially when cutting logs under tension.
3. Kickback Prevention: Maintain a firm grip, stand to the side of cutting path, do not cut with the tip of the bar.
4. Stopping: Release throttle trigger, allow engine to idle. Push master control lever to STOP position.
5. Refueling/Oiling: Stop engine and allow to cool. Refill fuel and oil tanks as needed. Check for leaks.

Tip: Periodically check chain tension, especially during the first tank of fuel, as new chains stretch.

Maintenance Schedule

Regular maintenance ensures performance and safety.

Interval	Task
Before each use	Check chain tension, sharpness, and lubrication. Inspect for loose parts or damage.
Daily	Clean air filter. Check fuel and oil lines for cracks.
Weekly	Clean cooling fins and cylinder area. Clean spark arrestor screen in muffler.
Monthly	Inspect spark plug, replace if electrode is worn. Check anti-vibration elements.
Seasonally	Replace fuel filter. Clean carburetor (or have serviced). Check clutch and sprocket wear.
As needed	Sharpen chain. Replace worn guide bar. Replace chain when stretched beyond adjuster limit.

Chain Sharpening & Tensioning

A sharp, properly tensioned chain is essential.

1. Tensioning: Loosen bar nuts. Turn tensioning knob until chain fits snugly against bar but can be pulled around by hand. Tighten bar nuts while lifting bar tip up. Re-check tension.
2. Sharpening: Use correct round file size for your chain (typically 5/32" or 3/16"). File each cutter at the manufacturer's specified angle (usually 30°). Maintain equal file strokes per cutter. File depth gauges (rakers) with a flat file and gauge.

WARNING! Always wear heavy gloves when handling the chain. Ensure engine is off and spark plug wire is disconnected.

Fuel & Lubrication

Use only high-quality, fresh materials.

• Fuel Mix: 50:1 ratio. Use 89 octane or higher unleaded gasoline mixed with STIHL 2-Cycle Engine Oil. Do not use fuel older than 60 days.
• Chain Oil: Use STIHL chain oil or a high-quality, tacky bar and chain oil for all temperatures. Do not use waste oil.
• Gear Housing Grease: Periodically grease the drive sprocket needle bearing (requires grease gun adapter).

CAUTION! Gasoline is extremely flammable. Store fuel in an approved container away from sparks, heat, and open flame.

Storage Guidelines

Proper storage prevents fuel system issues and corrosion.

1. Drain all fuel from the tank and run the carburetor dry.
2. Remove, clean, and oil the chain. Store separately.
3. Clean the entire saw, especially the air intake, cooling fins, and guide bar groove.
4. Store in a dry, secure place, out of reach of children.
5. For long-term storage, remove spark plug and pour a teaspoon of engine oil into the cylinder. Pull starter rope slowly to distribute oil, then reinstall plug.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine will not start	No spark, flooded, old fuel, clogged filter	Check spark plug; use fresh fuel mix; clean air filter; set control to half-throttle and pull without choke.
Engine starts then dies	Clogged fuel filter, carburetor issues, vent blockage	Replace fuel filter; clean carburetor; ensure tank vent is clear.
Chain does not turn	Chain brake engaged, clutch worn, sprocket damaged	Disengage chain brake; inspect clutch and sprocket for wear.
Chain turns at idle	Idle speed too high	Adjust idle speed screw (may require service).
Poor cutting performance	Dull chain, improper filing, low chain oil	Sharpen chain correctly; check oil flow (line on ground when running at speed).
Excessive vibration	Loose parts, worn AV mounts, unbalanced chain	Tighten all nuts/bolts; inspect AV mounts; check chain for damaged/worn cutters.
Oil not dispensing	Empty oil tank, clogged oil passage, worn pump	Fill tank; clean oil holes in bar; check oil line; inspect pump.

Service: For repairs beyond basic maintenance, contact an authorized STIHL servicing dealer. Use only genuine STIHL parts.

Support: For additional information, visit www.stihlusa.com or contact your local STIHL dealer.