Husqvarna 525LST User Manual

525LST, 525RS, 525RJD
EN Operator's manual 2-26

Husqvarna 525LST Specifications

General

Engine displacement	25.4 cm³
Sound pressure level at operators ear	94 dB(A)
Sound power level, guaranteed (LWA)	106 dB(A)
Engine type	2-stroke
Shaft type	Straight
Power output	1 kW
Fuel tank volume	0.51 l

Summary

Introduction

Product Description

Details about the grass trimmer and its continuous development for safety and efficiency.

Intended Use

Specifies the product's use for cutting grass and clearing grass, with a note on national regulations.

Product Overview

Symbols on the Product

General Warning and Manual Reference Symbols

Symbols indicating general danger, injury risk, and the need to consult the operator's manual.

Safety Distance and Blade Safety Symbols

Symbols denoting minimum safety distance and warnings about ejected objects and cutting risks.

Cutting Attachment Type and Noise Emission Symbols

Symbols related to approved cutting attachments and environmental noise emission information.

Handle Position, Speed, and Rating Plate Indicators

Indicators for handle limits, maximum output shaft speed, and rating plate information.

Protective Gear Symbols

Illustrations of required personal protective equipment such as helmets, hearing, and eye protection.

Safety

Safety Definitions

Explains the meaning of warnings, cautions, and notes used throughout the manual for clarity.

General Safety Instructions

Provides fundamental safety guidelines and precautions essential for product operation.

Safety Instructions for Operation

Details specific precautions required before and during the operation of the product.

Safety (Continued)

Work Area Safety

Covers ensuring a safe working environment, clearing debris, and maintaining stable footing.

Operational Safety Precautions

Includes instructions on handling the product correctly, stopping the engine, and avoiding specific hazards.

Personal Protective Equipment

Lists and describes essential personal protective equipment (PPE) required for safe operation.

Personal Protective Equipment (Continued)

Hearing Protection

Specifies the need for approved hearing protection to prevent permanent hearing impairment from noise.

Eye Protection

Mandates approved eye protection, including goggles and visors, to prevent eye injuries.

Gloves

Recommends using gloves for protection when handling cutting equipment or performing maintenance.

Protective Boots

Stresses the use of protective boots with steel toes and non-slip soles for foot safety.

Protective Clothing

Advises on wearing appropriate clothing to prevent snagging on obstacles and potential injury.

Safety Devices on the Product

Product Safety Features Overview

Introduces the section covering safety features, their purpose, and required maintenance checks.

Maintenance and Safety Component Integrity

Emphasizes correct maintenance for product lifespan and accident prevention, referencing safety components.

Throttle Trigger Lockout Check

Describes the function of the throttle trigger lockout and how to perform a safety check on it.

Safety Device Checks

Throttle Control and Lockout Check

Details the procedure to verify the proper functioning of the throttle control and lockout mechanism.

Stop Switch Check

Explains how to test the stop switch to ensure it correctly stops the engine.

Cutting Attachment Guard Check

Warns about using the correct and properly attached cutting attachment guard for safety.

Safety Device Checks (Continued)

Cutting Attachment Guard Inspection

Instructs to visually inspect the cutting attachment guard for any damage or cracks.

Vibration Damping System Check

Outlines the importance of checking the vibration damping units for correct attachment and integrity.

Muffler Check

Details visual checks for muffler damage, deformation, and the spark arrester screen.

Cutting Equipment

Blade and Grass Knife Usage

Guides on using blades and grass knives for cutting coarse or heavy grass effectively.

Trimmer Head Usage

Explains how to use the trimmer head for cutting grass and considerations for trimmer line length.

Blade Sharpening and Maintenance

Provides instructions on sharpening grass knives/blades and handling damaged ones.

Recommended Cutting Attachments and Guards

Stresses using only recommended cutting attachments and guards for safety and performance.

Fuel Safety

Fuel Handling Precautions

Warns against starting the product with spilled fuel and advises on proper fuel handling and cleanup.

Fuel Leaks and Spills

Instructs to check for fuel leaks and handle spills carefully to avoid fire hazards.

Refueling Safety

Details safety measures during refueling, including location, engine cooling, and container use.

Fuel Safety (Continued)

Fuel Cap and Tank Contamination

Advises on opening fuel caps slowly and cleaning around them to prevent tank contamination.

Refueling Area Safety

Mandates moving the product at least 3m (10ft) away from the refueling area before starting.

Safety Instructions for Maintenance

Engine Stop and Cutting Attachment Safety

Emphasizes stopping the engine and ensuring the cutting attachment is stationary before any maintenance.

Cutting Attachment Integrity

Warns that faulty cutting attachments can increase the risk of accidents.

Trimmer Cord Winding

Stresses the importance of winding the trimmer cord tightly and evenly to prevent harmful vibration.

Assembly

General Assembly Safety

Requires reading the safety chapter and removing the spark plug cable before starting assembly.

Assembling the J-handle

Provides step-by-step instructions for attaching the J-handle to the loop handle.

Assembling the Loop Handle

Details the process of attaching the loop handle onto the shaft between the handles.

Assembly (Continued)

Installing the Suspension Ring

Guides on attaching the suspension ring for product balance and harness connection.

Assembling the Two-Piece Shaft (525RJD)

Explains how to connect and disconnect the two-piece shaft for the 525RJD model.

Assembling Cutting Attachment Guard and Trimmer Head

Details attaching the correct cutting attachment guard and the trimmer head.

Assembly (Continued)

Attaching Cutting Attachment Guard

Covers securing the cutting attachment guard using a bolt to the shaft.

Installing Drive Disc and Locking Shaft

Describes installing the drive disc and using a locking pin to secure the shaft for attachment.

Disassembling Cutting Attachment Guard and Trimmer Head

Provides steps to remove the cutting attachment guard and trimmer head from the shaft.

Attaching and Removing Locknut

Explains the use of the locknut for attaching cutting attachments and its left-hand thread.

Assembly (Continued)

Locknut Tightening and Safety

Advises on using the correct spanner for the locknut and handling potential injury risks.

Assembling the Handlebar (525RS)

Details the steps to assemble the handlebar for the 525RS model, including screw tightening.

Attaching Grass Blade and Guard

Guides on mounting the grass blade, support cup, and flange with the blade guard.

Assembly (Continued)

Securing Grass Blade Components

Covers tightening the nut to the support flange for the grass blade assembly with specific torque.

Harness Quick Release Function

Explains the quick release function of the harness and safety checks for its operation.

Adjusting the Harness

Provides instructions for fitting and adjusting the harness for optimal balance and comfort.

Correct Balance of the Product

Details how to achieve correct product balance for different tasks like grass clearing.

Operation

Fuel Requirements

Specifies the need for a two-stroke engine fuel mixture and minimum octane rating for optimal performance.

Husqvarna Alkylate Fuel

Recommends Husqvarna alkylate fuel for better performance, reduced emissions, and engine cleanliness.

Two-Stroke Oil Requirements

Advises on using the correct type and ratio of two-stroke oil to prevent product damage.

Operation (Continued)

Mixing Gasoline and Two-Stroke Oil

Provides detailed instructions and cautions for mixing fuel and oil correctly to ensure proper engine function.

Filling the Fuel Tank

Guides on safely filling the fuel tank, including cleaning the area and moving away before starting.

Pre-Operation Checks

Lists essential checks before operating the product, including work area inspection and product integrity.

Operation (Continued)

Muffler Maintenance Checks

Ensures the locknut is secure and blade guards are free from damage before operation.

Preparing a Cold Engine for Start

Details the steps for preparing the engine for starting, including using the air purge bulb.

Starting the Product

Provides step-by-step instructions and safety warnings for starting the engine safely.

Operation (Continued)

Starting with Throttle Handle Lock (525RS)

Explains how to use the start throttle lock feature for initiating operation of the 525RS model.

Stopping the Product

Instructs on how to safely stop the engine using the stop switch.

Surface Safety and Burn Risk

Warns about hot surfaces and potential electrical shock risks from damaged spark plug caps.

Grass Clearing with Grass Blade

Provides techniques and safety tips for effective grass clearing using a grass blade.

Maintenance

Grass Trimming with Trimmer Head

Details techniques for trimming grass, including line length adjustment and throttle usage.

Cutting Grass Techniques

Explains how to cut grass effectively with the trimmer line parallel to the ground.

Sweeping Grass

Describes using the trimmer head airflow to clear cut grass from an area.

Maintenance Schedule Overview

Outlines recommended maintenance tasks and their frequency (daily, weekly, monthly).

Maintenance (Continued)

Throttle and Stop Switch Checks

Details checks for throttle trigger lockout, stop switch, and cutting attachment rotation at idle.

Air Filter and Guard Maintenance

Covers cleaning the air filter and inspecting the cutting attachment guard for damage.

Head, Tank, and Line Checks

Includes checking the trimmer head, fuel tank, fuel lines, and cooling system for issues.

Spark Plug and Carburetor Cleaning

Details cleaning the spark plug, adjusting the electrode gap, and cleaning the carburetor area.

Maintenance (Continued)

Bevel Gear and Grease Check

Explains checking and filling the bevel gear with the correct type and quantity of grease.

Two-Piece Shaft Greasing

Advises on applying grease to the two-piece shaft after specific hours of operation.

Adjusting Start Throttle Speed (525RS)

Guides on adjusting the start throttle speed for the 525RS model to ensure proper starting.

Adjusting Idle Speed

Details how to adjust the idle speed to ensure smooth engine operation and cutting attachment stop.

Maintenance (Continued)

Muffler Maintenance

Describes maintenance for the muffler, including spark arrestor mesh checks and potential overheating.

Spark Plug Examination

Covers examining the spark plug for issues and ensuring correct type, gap, and condition.

Air Filter Cleaning

Explains the importance of cleaning the air filter to prevent carburetor malfunctions and performance issues.

Maintenance (Continued)

Air Filter Cleaning Procedure

Provides step-by-step instructions for safely and effectively cleaning the air filter.

Bevel Gear Maintenance

Details checking and filling the bevel gear with the correct Husqvarna special grease.

Two-Piece Shaft Greasing

Advises on applying grease to the two-piece shaft after specific hours of operation.

Troubleshooting

Engine Does Not Start

Lists common causes and procedures for when the engine fails to start, such as stop switch or fuel issues.

Troubleshooting (Continued)

Engine Starts but Stops

Addresses issues where the engine starts but then stops again, often due to fuel or air filter problems.

Transportation and Storage

Provides guidelines for safely transporting and storing the product and fuel, including long-term storage.

Product Disposal

Outlines procedures for disposing of the product and related chemicals responsibly according to regulations.

Technical Data

Engine Specifications

Lists technical details for the engine, including displacement, idle speed, and maximum output.

Ignition System and Fuel System Data

Provides specifications for the spark plug, carburetor, and fuel tank capacity.

Weight and Noise Emissions

Details the product's weight, measured sound power level, and guaranteed sound power.

Vibration Levels

Reports the vibration levels measured at the handles for different models according to ISO standards.

Accessories

Approved Accessories List

Lists recommended accessories and their compatibility with the specified power heads, evaluated for safety.

Cutting Attachment Guards

Specifies the part numbers for various cutting attachment guards recommended for use with the product.