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STIHL MSA 120 C,
MSA 140 C
2 - 31
Instruction Manual

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Table of Contents
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Summarization of Contents

Guide to Using this Manual
Applicable Documentation
Information on related documents for safe operation and understanding.
Warning Notices in Text
Explanation of danger, warning, and notice symbols used in the manual.
Symbols in Text
Meaning of symbols referencing chapters within the manual.
Overview
Chainsaw, Battery and Charger Components
Identification and description of key parts of the chainsaw, battery, and charger.
Product Symbols
Explanation of symbols found on the chainsaw, battery, and charger.
Safety Precautions
Warning Symbols
Explanation of warning signs and labels on the saw, battery, and charger.
Intended Use
Details on the proper applications and limitations for the chainsaw.
The Operator
Requirements and qualifications for safe chainsaw operation.
Clothing and Equipment
Recommendations for personal protective equipment and suitable work attire.
Work Area and Surroundings
Safety guidelines for maintaining a safe work area around the chainsaw.
Safe Condition
Criteria for ensuring the chainsaw, guide bar, saw chain, and battery are safe.
Working
General guidelines and precautions for operating the chainsaw safely.
Reactive Forces
Understanding and preventing kickback and other reactive forces.
Charging
Safety precautions for charging the battery.
Connecting to Power Supply
Safe practices for connecting the charger to a power source.
Transporting
Guidelines for safely transporting the chainsaw, battery, and charger.
Storing
Instructions for storing the chainsaw, battery, and charger safely.
Preparing the Saw for Operation
Preparing the Saw for Operation
Steps to take before starting work with the chainsaw.
Charging the Battery, LEDs
Mounting the Charger on a Wall
Instructions for securely mounting the charger on a wall.
Charging the Battery
Process for charging the battery and understanding charging indicators.
Battery State of Charge
How to check the battery's current charge level using LEDs.
Battery LEDs
Interpreting battery status and malfunction indicators.
Charger LED Status
Understanding the charger's operating status indicators.
Assembling the Saw
Mounting and Removing the Bar and Chain
Procedure for attaching and detaching the guide bar and saw chain.
Tensioning the Saw Chain
How to properly adjust the tension of the saw chain.
Filling Up with Saw Chain Oil
Procedure for filling the saw with chain oil for lubrication.
Engaging and Disengaging the Chain Brake
Engaging the Chain Brake
How to activate the chain brake for safety.
Disengaging the Chain Brake
How to deactivate the chain brake to operate the saw.
Removing and Fitting the Battery
Fitting the Battery
Instructions for inserting the battery into the chainsaw.
Removing the Battery
Instructions for safely removing the battery from the chainsaw.
Switching the Saw On/Off
Switching On
Step-by-step guide to starting the chainsaw.
Switching Off
Procedure for safely stopping the chainsaw.
Testing the Chain Saw and Battery
Checking the Chain Sprocket
How to inspect the chain sprocket for wear.
Checking the Guide Bar
Procedure for inspecting the guide bar for damage and wear.
Checking the Saw Chain
How to check the saw chain for sharpness and damage.
Testing the Chain Brake
Procedure to verify the proper function of the chain brake.
Checking the Controls
How to test the lockout button, trigger, and overall switch function.
Operating the Saw
Holding and Controlling the Chainsaw
Proper grip and body positioning for safe chainsaw operation.
Cutting
Techniques and safety precautions for cutting with the chainsaw.
Limbing
Safe procedures for removing branches from a felled tree.
Felling
Comprehensive safety guidelines for felling trees.
After Finishing Work
After Finishing Work
Steps to perform after completing chainsaw work.
Transporting
Transporting the Chainsaw
Guidelines for safely transporting the chainsaw.
Transporting the Battery
Safe practices for transporting the battery.
Transporting the Charger
Safe practices for transporting the charger.
Storing
Storing the Chainsaw
Proper procedures for storing the chainsaw.
Storing the Battery
Recommendations for storing the battery.
Storing the Charger
Proper procedures for storing the charger.
Cleaning
Cleaning the chainsaw
Instructions for cleaning the chainsaw.
Cleaning the Bar and Chain
Procedure for cleaning the guide bar and saw chain.
Cleaning the Battery
Instructions for cleaning the battery.
Cleaning the Charger
Instructions for cleaning the charger.
Maintenance
Deburring the Guide Bar
How to remove burrs from the guide bar.
Sharpening the Saw Chain
Guide to sharpening the saw chain for optimal performance.
Chain Brake Maintenance
Information on servicing intervals for the chain brake.
Repairing
Repairing Chain Saw, Battery and Charger
Limitations on user repair and when to contact a dealer.
Troubleshooting
Troubleshooting Chainsaw or Battery
Common faults, causes, and remedies for chainsaw and battery issues.
Troubleshooting Charger
Common faults, causes, and remedies for charger issues.
Specifications
STIHL MSA 120 C, MSA 140 C Chainsaws
Technical specifications for the MSA 120 C and MSA 140 C models.
Chain Sprockets and Chain Speeds
Information on compatible chain sprockets and chain speeds.
Minimum groove depth of guide bars
Specification for the minimum acceptable groove depth of guide bars.
STIHL AK Battery
Specifications for the STIHL AK battery technology.
Charger STIHL AL 101
Specifications for the STIHL AL 101 charger.
Extension Cords
Requirements for using extension cords with STIHL products.
Sound Values and Vibration Values
Data on sound pressure, sound power, and vibration levels.
Bar and Chain Combinations
STIHL MSA 120 C, MSA 140 C Chainsaws
Table detailing compatible guide bars and chains for the models.
Spare Parts and Accessories
Spare parts and accessories
Information on using original STIHL spare parts and accessories.
Disposal
Disposal of Chain Saw, Battery and Charger
Guidelines for environmentally responsible disposal of the product.
EC Declaration of Conformity
STIHL MSA 120 C, MSA 140 C Chainsaws
Declaration of conformity for the chainsaw models.
STIHL AL 101 Charger Conformity Notice
Conformity notice for the STIHL AL 101 charger.
General Power Tool Safety Warnings
Introduction
Introduction to general safety precautions for electric power tools.
Work area safety
Safety measures for maintaining a clean and safe work environment.
Electrical safety
Precautions related to electrical hazards and shock prevention.
Personal safety
Guidelines for operator alertness, protective equipment, and body positioning.
Electric power tool use and care
Proper usage, maintenance, and care of electric power tools.
Battery tool use and care
Safe practices for using and caring for battery-powered tools.
Service
Guidelines for professional servicing of power tools.
Chain Saw Safety Warnings
Specific safety warnings and precautions for chainsaw operation.
Causes and operator prevention of kickback
Understanding and preventing kickback during chainsaw use.

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