Husqvarna 3120XP User Manual

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3120XP
Oper ator’s manual
Please r ead the operator’s manual carefully and make sure you understand the instructions before using the machine.

Husqvarna 3120XP Specifications

General

Cylinder Displacement	118.8 cm³
Maximum Power Speed	9000 rpm
Idling Speed	2500 rpm
Fuel Tank Volume	1.25 L
Recommended Bar Length, Min-Max	24-42 inches
Chain Gauge	0.063"
Engine Power	6.2 kW
Oil Tank Volume	0.7 L
Chain Pitch	3/8"
Weight (excl. cutting equipment)	10.4 kg

Summary

KEY TO SYMBOLS

Symbols Overview

Explains symbols used on the machine and within the operator's manual for clarity and safety.

INTRODUCTION

Welcome and Company History

Welcomes the customer and provides a brief overview of Husqvarna's heritage and product development.

WHAT IS WHAT?

Chain Saw Component Identification

Identifies and labels all parts of the Husqvarna 3120XP chain saw using a diagram for user reference.

GENERAL SAFETY PRECAUTIONS

Pre-Operation Safety Checks

Covers essential checks before operating a new chain saw, including reading the manual and using common sense.

Operator Safety Guidelines

Emphasizes wearing PPE, understanding kickback, and avoiding hazardous conditions or operating while impaired.

Personal Protective Equipment (PPE)

Lists mandatory personal protective equipment required for safe chain saw operation.

Machine Safety Features

Explains the function and inspection of the chain brake, front hand guard, and other safety devices.

Chain Brake Operation and Kickback

Details how the chain brake works, its activation methods, and its role in mitigating kickback risks.

Kickback and Chain Brake Scenarios

Discusses specific situations where the chain brake may or may not activate during kickback.

Operator Controls and Systems

Explains the throttle lockout, chain catcher, right hand guard, and vibration damping system functions.

Muffler and Cutting Equipment Safety

Covers muffler safety, exhaust hazards, and essential guidelines for cutting equipment maintenance.

Cutting Equipment Best Practices

Emphasizes using recommended equipment, proper sharpening, depth gauge, and chain tension for safety.

Cutting Equipment Maintenance

Details lubrication, kickback reduction features, and terminology for bars and chains.

Chain Sharpening and Depth Gauge

Introduces the importance of correct chain sharpening and depth gauge settings.

Cutting Tooth Sharpening Technique

Provides detailed instructions on how to sharpen cutting teeth correctly using files and gauges.

Depth Gauge Setting Adjustment

Explains how to adjust the depth gauge to maintain optimal cutting performance and reduce kickback.

Depth Gauge and Chain Tensioning

Details the procedures for adjusting the depth gauge and tensioning the chain correctly.

Chain Lubrication Importance

Discusses the critical role of chain lubrication and the risks of poor lubrication.

Chain Oil Filling and Checks

Covers filling the chain oil tank, checking lubrication, and inspecting drive sprockets.

Needle Bearing Lubrication

Advises on the regular greasing of the needle bearing on the drive shaft.

Chain and Bar Wear Inspection

Provides guidelines for checking chain and bar wear, and when replacement is necessary.

ASSEMBLY

Fitting the Guide Bar and Chain

Step-by-step instructions for installing the guide bar and chain, including tensioning.

FUEL HANDLING

Fuel Mixture and Oil Requirements

Explains the correct fuel-to-oil ratio and recommends specific two-stroke oils for the engine.

Fuel Mixing Procedure

Details the safe method for mixing gasoline and two-stroke oil in a clean container.

Chain Oil System and Refueling Safety

Covers chain oil requirements, extra oil flow, and crucial safety precautions during refueling.

Fuel Safety and Storage

Outlines fuel safety procedures for refueling, starting, and discusses transport and long-term storage.

STARTING AND STOPPING

Starting a Cold Engine

Provides detailed steps for starting a cold engine, including using the decompression valve and choke.

Starting a Warm Engine

Explains the slightly modified procedure for starting a warm engine, omitting the choke.

Post-Start Engine Operation

Describes actions needed immediately after starting to ensure proper engine function and prevent wear.

Stopping the Engine Safely

Details the straightforward method for stopping the chain saw's engine.

WORKING TECHNIQUES

Pre-Operation Checks and Preparation

Lists essential checks for the chain saw and the work area before starting operation.

General Safe Working Practices

Covers fundamental safety rules, awareness of surroundings, and avoiding hazardous conditions.

Proper Grip and Control

Emphasizes maintaining a firm grip with both hands for optimal control and kickback reduction.

Safe Cutting Height and Stance

Advises on cutting height, avoiding tip contact, and maintaining a stable stance.

Limbing and Kickback Prevention

Focuses on specific techniques and precautions for limbing to avoid kickback.

Cutting Techniques and Chain Jamming

Explains cutting methods, risks of chain jamming, and how to handle them.

Basic Cutting Principles

Covers fundamental cutting practices like full throttle use and avoiding cutting with no load.

Limbing Techniques

Provides guidance on safely limbing branches, especially difficult ones.

Safe Log Cutting Methods

Describes how to safely cut logs, avoiding piles and ensuring proper support.

Tree Felling Introduction and Safety Distance

Warns inexperienced users about felling and emphasizes safe distances and clearing the area.

Factors Affecting Felling Direction

Lists natural and environmental factors that influence how a tree will fall.

Tree Felling Preparation and Retreat Path

Covers preparing the tree, clearing the base, and establishing a safe retreat path.

Directional and Felling Cuts

Details the precise cuts required to control the tree's felling direction.

Felling Hinge Control and Trapped Trees

Explains the felling hinge's role and safety procedures for freeing trapped trees.

Cutting Tensioned Wood Safely

Provides methods for safely cutting wood under tension, avoiding springback.

Understanding and Avoiding Kickback

Defines kickback and provides strategies to avoid it through proper technique and awareness.

Limbing Safety and Kickback Prevention

Focuses on specific kickback risks and safety measures during limbing operations.

MAINTENANCE

Carburetor Function and Adjustment

Explains the carburetor's role and the process for basic and fine adjustment.

Carburetor Adjustment Procedures

Details the steps for adjusting the L-jet and T-screw for optimal engine performance.

High Speed Jet and Carburetor Adjustment

Discusses the high speed jet and symptoms of a correctly adjusted carburetor.

Safety Equipment Inspection

Covers inspection of the chain brake band, front hand guard, and inertia brake release.

Control Systems Checks

Details checks for the brake trigger, throttle lockout, chain catcher, and right hand guard.

Vibration System and Stop Switch Checks

Covers checking vibration damping units and testing the stop switch function.

Muffler and Starter System Maintenance

Advises on muffler inspection, starter recoil spring safety, and starter cord replacement.

Recoil Spring and Starter Assembly

Provides procedures for changing recoil springs and fitting the starter assembly.

Air Filter and Spark Plug Maintenance

Explains cleaning and replacing the air filter and servicing the spark plug.

Bar Tip Sprocket Lubrication

Details the importance and procedure for lubricating the bar tip sprocket.

Needle Bearing and Oil Pump Adjustment

Covers needle bearing lubrication and how to adjust the oil pump for proper chain lubrication.

Cooling System Cleaning

Explains the cooling system and the need for regular cleaning to prevent overheating.

MAINTENANCE SCHEDULE

Daily, Weekly, and Monthly Tasks

Provides a comprehensive schedule of maintenance tasks categorized by frequency: daily, weekly, and monthly.

TECHNICAL DATA

Motor and Ignition Specifications

Lists detailed technical specifications for the motor, ignition system, and fuel/lubrication system.

Chain and Bar Specifications

Provides technical data for the chain and bar, including weight, length, pitch, and drive link thickness.

Recommended Cutting Equipment

Lists recommended bar and chain combinations that meet safety standards.

Saw Chain Filing Gauges

Illustrates and explains the use of file gauges for proper saw chain sharpening.

FEDERAL EMISSION CONTROL WARRANTY STATEMENT

Warranty Coverage and Owner Responsibilities

Outlines warranty rights, obligations, what is covered, and owner responsibilities for maintenance.

Filing Claims and Service

Explains the process for filing warranty claims and obtaining service from authorized dealers.

Emission Control Parts and Maintenance Statement

Lists specific emission control parts covered and reiterates the owner's maintenance responsibility.

AMERICAN STANDARD SAFETY PRECAUTIONS

Kickback Safety for Chain Saw Users

Provides essential safety advice focused on understanding and preventing kickback.

General User Safety Practices

Offers broad safety precautions for chain saw operation, including fatigue, PPE, and handling.