Bosch Chainsaw Manual

The Bosch Chainsaw is a powerful and reliable tool designed for cutting wood, featuring a high-performance electric or gas motor, safety chain brake, automatic oiler, ergonomic handles, low-kickback chain, tool-free chain tensioning, and overload protection. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Powerful motor, Guide Bar, Saw Chain, Chain Brake, Front Hand Guard, Chain Tensioner, Oil Tank, Ergonomic rear handle with trigger, Side-mounted chain tensioning knob.

Feature	Description
Motor	High-torque electric or gas engine for efficient cutting
Chain Brake	Safety feature to stop chain instantly in case of kickback
Automatic Oiler	Lubricates chain and bar during operation
Tool-Free Chain Tensioning	Adjust chain tension quickly without tools
Low-Kickback Chain	Reduces risk of sudden upward motion
Ergonomic Handles	Anti-vibration and comfortable grip for reduced fatigue
Chain Catcher	Prevents broken chain from striking operator
Lock-Off Button	Prevents accidental starting
Overload Protection	Automatically cuts power to prevent motor damage
Guide Bar	Durable bar supporting the cutting chain

Safety Instructions

Read all instructions before use. Wear appropriate safety gear.

1. Always wear safety glasses, hearing protection, gloves, and sturdy boots.
2. Keep hands away from cutting area and chain when operating.
3. Ensure chain brake is functional before each use.
4. Never operate chainsaw above shoulder height or on a ladder.
5. Keep bystanders and pets at a safe distance.

WARNING! Risk of severe injury or death. Do not operate if tired or under influence. Always hold chainsaw with both hands.

Assembly & Installation

Unpack and inspect all parts. Assemble on a clean, flat surface.

1. Attach Guide Bar: Place bar onto mounting studs, align chain with sprocket.
2. Install Chain: Fit chain around bar, ensuring cutting teeth face forward.
3. Tension Chain: Use side knob to adjust tension until chain snaps back when pulled.
4. Fill Oil Tank: Use recommended bar and chain oil; check level before each use.
5. Power Connection: For electric models, plug into appropriate outlet; for gas, mix fuel as specified.

CAUTION! Ensure chain is properly tensioned—too loose may derail; too tight may damage bar.

Specifications

• Power Source: Electric: 120V AC, 15A; Gas: 2-cycle engine, 40cc.
• Guide Bar Length: 14", 16", or 18" options.
• Chain Speed: Up to 20 m/s under load.
• Weight: 9-12 lbs (depending on model).
• Oil Capacity: 6.8 fl oz (200 ml) reservoir.
• Sound Level: <105 dB(A) at operator's position.
• Vibration Level: <2.5 m/s² (front/rear handle).
• Safety Standards: Complies with ANSI/UL 60745 and EPA regulations.

Controls and Functions

Main Controls: On/Off Switch, Lock-Off Button, Trigger, Chain Brake Lever, Front Hand Guard, Chain Tension Knob, Oil Filler Cap.

Operation: Press lock-off button, then squeeze trigger to start. Engage chain brake by pushing hand guard forward.

Adjustments: Chain tension (side knob), oil flow rate (screw near tank). Features: Automatic oiling system, overload protection, ergonomic anti-vibration handles.

Operating Instructions

For cutting logs, branches, and firewood.

1. Pre-Start Check: Ensure chain is sharp, tensioned, and lubricated; clear work area.
2. Starting: Place on ground, engage chain brake, press lock-off, then pull trigger (electric) or use starter cord (gas).
3. Cutting: Let chain reach full speed before contact; use steady pressure; avoid twisting.
4. Kickback Prevention: Hold firmly, do not cut with tip, be aware of pinch points.
5. Stopping: Release trigger, engage chain brake, unplug or turn off gas model.

Tip: Plan cut to avoid binding; use wedges for larger logs.

Maintenance & Cleaning

Regular maintenance ensures performance and safety.

1. After Each Use: Clean sawdust from bar, chain, and air vents.
2. Check Chain Tension: Adjust if loose; cool chain before tensioning.
3. Inspect Bar: Turn bar regularly for even wear; file down burrs.
4. Oil System: Refill tank; check oiler hole for clogs.
5. Air Filter: Clean or replace (gas models) per schedule.
6. Spark Plug: Replace annually or if hard starting occurs.

WARNING! Disconnect power or remove spark plug before maintenance.

Chain Sharpening & Replacement

Sharp chain improves cutting and safety.

1. Sharpening: Use round file matching chain pitch; file each cutter at recommended angle (usually 30°).
2. Depth Gauges: File down to maintain proper height (use depth gauge tool).
3. Replacement: When cutters are worn beyond repair, replace chain and possibly bar.
4. Bar Maintenance: Clean groove; ensure oil holes are clear.

CAUTION! Wear gloves when handling chain; ensure correct chain direction during installation.

Storage Guidelines

Store in dry, secure place out of reach of children.

1. Clean thoroughly before storage.
2. Drain fuel (gas models) or run carburetor dry.
3. Remove chain, clean, and coat with oil to prevent rust.
4. Store in original case or cover to protect from dust.

Tip: Hang saw by rear handle to avoid bar deformation.

Regulatory Information

Complies with ANSI/UL 60745-1, EPA Phase III emission standards (gas models). Contains materials that may be recyclable. Copyright © Bosch Power Tools. For support, visit www.bosch-pt.com or contact 1-877-BOSCH99 (1-877-267-2499).

Troubleshooting

Symptom	Possible Cause	Corrective Action
Chain does not move	Chain brake engaged; low power	Disengage brake; check power source/battery; inspect drive sprocket.
Chain oils poorly	Empty oil tank; clogged oiler	Refill with correct oil; clean oil holes; check pump.
Excessive vibration	Loose parts; worn chain/bar	Tighten all fasteners; replace worn components.
Hard starting (gas)	Old fuel; dirty spark plug	Use fresh fuel mix; clean/replace spark plug.
Chain comes off bar	Incorrect tension; worn bar	Adjust tension; replace bar if groove is widened.
Overheating	Dull chain; insufficient oil	Sharpen chain; ensure oil flow; allow to cool.

Reset: For electric models with thermal cut-out, wait 10 minutes to reset.

Service: Authorized service centers only. Do not attempt internal repairs.