Husqvarna FS400 LV Walk Behind Concrete Saw Instruction Manual

: September 25, 2024
: Husqvarna

Table of Contents

Husqvarna FS400 LV Walk Behind Concrete Saw
Product Usage Instructions
KEY TO SYMBOLS
PRESENTATION
MACHINE´S SAFETY EQUIPMENT
ASSEMBLING AND ADJUSTMENTS
Transport and storage
FUEL HANDLING
OPERATING
STARTING AND STOPPING
MAINTENANCE
TECHNICAL DATA
US WARRANTY STATEMENT
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Husqvarna FS400 LV Walk Behind Concrete Saw

Product Specifications

Model: FS400 LV
Cutting Depth: 0-180mm (0-7 inches)

Product Usage Instructions

Safety Precautions
Before using the machine, please ensure to read and understand the operator’s manual thoroughly. Some key safety precautions include:

Wear personal protective equipment.
Avoid using the machine near ignitable substances or gases.
Always keep body parts away from the cutting equipment.

Machine Operation
When operating the machine, follow these guidelines:

Ensure the blade is removed before hoisting, loading, unloading, or transporting the machine.
Check the cutting attachment for any damage before use.
Keep the saw leveled without the blade when checking oil level.

Maintenance
Proper maintenance is essential for the longevity of the machine. Remember to:

Fill the tank only with water, not gasoline or flammable liquids.
Use a cutting blade with a speed rating equal to or higher than specified on the machine’s rating plate.
Provide good ventilation to avoid inhaling dust and exhaust fumes.

Frequently Asked Questions (FAQ)

What should I do if I encounter a warning symbol on the machine?
If you see a warning symbol, refer to the operator’s manual for guidance on how to proceed safely.
Can I use gasoline in the machine’s tank?
No, it is recommended to fill the tank only with water to prevent any potential hazards related to flammable liquids.

Operator’s manual
FS400 LV

Please read the operator’s manual carefully and make sure you understand the instructions before using the machine.

KEY TO SYMBOLS

Symbols on the machine:

WARNING! The machine can be a dangerous tool if used incorrectly or carelessly, which can cause serious or fatal injury to the operator or others.
Please read the operator’s manual carefully and make sure you understand the instructions before using the machine.
Wear personal protective equipment. See instructions under the heading ”Personal protective equipment”.
All displacement of the machine outside the cutting area shall be carried out with the tool not in rotation.
Remove the blade prior to hoisting, loading, unloading and transporting the machine.
Arrow on tool guard indicating the direction of tool rotation.
Up and down plunging
The guards should always be ﬁtted on the machine. Never allow blade exposure to exceed 180°.
Check the cutting attachment. Never use blunt, cracked or damaged equipment.
The blades should be marked with the same or a higher speed than that stated on the machine’s rating plate. A cutting blade running at a too high speed can break or cause serious damage.
Do not use the machine near ignitable substances or gases.
WARNING! Dust forms when cutting, this can cause injuries if inhaled. Use an approved breathing mask. Avoid inhaling exhaust fumes. Always provide for good ventilation.
Hot surface.
Machinery hazard! Always keep all parts of your body away from blade and all other moving parts.
Risk of cuts. Keep all body parts away from the cutting equipment.
Transmission stop
Parking brake Activated / Deactivated
Cutting depth indicator
Fill tank only with water
- Keep saw leveled, without blade, when checking oil level.
Always use the machine mounted lifting eye when lifting.
This product is in accordance with applicable
CE directives. If marked on the machine.
Noise emission to the environment according to the European Community’s Directive. The machine’s emission is speciﬁed in the Technical data chapter and on the label.
FS400 LV
Type plate
- A: Brand
- B: Product No.
- C: Model F
- D: Serial number
- E: Manufacturing date, year, week
- F: Manufacturer, address, phone number

WARNING
The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.

NOTICE! CALIFORNIA AIR RESOURCES BOARD
(CARB): This machine is considered a preempt Off-Road Applicatoin as relating to CARB standards. The U.S. EPA has sole authority to establish emission standards for preempt construction equipment. For more information see www.arb.ca.gov/msprog/offroad/preempt.htm

Explanation of warning levels
The warnings are graded in three levels.
WARNING!

WARNING! Used if there is a risk of serious injury or death for the operator or damage to the surroundings if the instructions in the manual are not followed.
CAUTION!
CAUTION! Used if there is a risk of injury to the operator or damage to the surroundings if the instructions in the manual are not followed.
NOTICE!
NOTICE! Used if there is a risk of damage to materials or the machine if the instructions in the manual are not followed.

Note the following before starting:

WARNING! Cutting, especially when DRY cutting, generates dust that comes from the material being cut, which frequently contains silica. Silica is a basic component of sand, quartz, brick clay, granite and numerous other minerals and rocks. Exposure to excessive amount of such dust can cause:
Respiratory disease (affecting your ability to breath), including chronic bronchitis, silicosis and pulmonary ﬁbrosis from exposure to silica. These diseases may be fatal;
Skin irritation and rash.
Cancer according to NTP and IARC */ National Toxicology Program, International Agency for Research on Cancer

Take precautionary steps:

Avoid inhalation of and skin contact with dust, mist and fumes.
Wear and ensure that all bystanders wear appropriate respiratory protection such as dust masks designed to ﬁlter out microscopic particles. (See OSHA 29 CFR Part 1910.1200)
Wet cut when feasible, to minimize dust.

PRESENTATION

Dear customer!

Thank you for choosing a Husqvarna product!
It is our wish that you will be satisﬁed with your product and that it will be your companion for a long time. A purchase of one of our products gives you access to professional help with repairs and services. If the retailer who sells your machine is not one of our authorised dealers, ask him for the address of your nearest service workshop.
This operator’s manual is a valuable document. Make sure it is always at hand at the work place. By following its content (operating, service, maintenance etc.) the life span and the second-hand value of the machine can be extended. If you ever lend or sell this machine, make sure that the borrower or buyer gets the operator′s manual, so they will also know how to properly maintain and use it.
More than 300 years of innovation
Husqvarna AB is a Swedish company based on a tradition that dates back to 1689, when the Swedish King Karl XI ordered the construction of a factory for production of muskets. At that time, the foundation was already laid for the engineering skills behind the development of some of the world’s leading products in areas such as hunting weapons, bicycles, motorcycles, domestic appliances, sewing machines and outdoor products.
Husqvarna is the global leader in outdoor power products for forestry, park maintenance and lawn and garden care, as well as cutting equipment and diamond tools for the construction and stone industries.

User responsibility
It is the owner’s/employer’s responsibility that the operator has sufﬁcient knowledge about how to use the machine safely. Supervisors and operators must have read and understood the Operator’s Manual. They must be aware of:

The machine’s safety instructions.
The machine’s range of applications and limitations.
How the machine is to be used and maintained.

Local regulations could restict the use of this machine. Find out what regulations are applicable where you work before you start using the machine.

The manufacturer’s reservation
All information and all data in the Operator’s Manual were applicable at the time the Operator’s Manual was sent to print.
Husqvarna AB has a policy of continuous product development and therefore reserves the right to modify the design and appearance of products without prior notice.
For customer information and assistance, contact us at our website: www.husqvarna.com

Features
Values such as high performance, reliability, innovative technology, advanced technical solutions and environmental considerations distinguish Husqvarna’s products.

What is what on the machine?

Machine stop
Water tank
Lifting eye
Fuel tank
Protective cover – drive belt
Engine oil ﬁll
Tension screw, drive belt
Blade Guard
Front guide
Starter handle
Water tap
Draining, engine oil
Service spanner
Cutting depth indicator
Locking lever, cutting depth
Feeding wheel, cutting depth
Handle
Operator’s manual
Parking brake

MACHINE´S SAFETY EQUIPMENT

General

WARNING! Never use a machine that has faulty safety equipment! If your machine fails any checks contact your service agent to get it repaired.
The engine should be switched off, and the stop switch in STOP position.
This section describes the machine′s safety equipment, its purpose, and how checks and maintenance should be carried out to ensure that it operates correctly.

Machine stop
The machine stop is used to quickly switch off the engine and all electrical functions except lights.

Testing the machine stop

Press the machine stop and check that the engine stops.
Disengage machine stop button (twist clockwise).

Blade Guard

WARNING! Always check that the blade guard is ﬁtted correctly before starting the machine.
The blade guard is designed to prevent parts of the blade or cutting fragments from being thrown towards the user.
Checking the blade guard
Check that the blade guard is not damaged or cracked. Replace the blade guard if it is exposed to impact or is cracked.
Always check that the guard is correctly ﬁtted before starting the machine. Also check that the blade is ﬁtted correctly and is not damaged in any way. A damaged blade can cause personal injuries.
Mufﬂer
WARNING! Never use a machine without a mufﬂer, or with a faulty mufﬂer. A damaged mufﬂer may substantially increase the noise level and the ﬁre hazard. Keep ﬁre ﬁghting equipment handy.
The mufﬂer gets very hot during and after use. This also applies during idling. Be aware of the ﬁre hazard, especially when working near ﬂammable substances and/or vapours.
The mufﬂer is designed to keep noise levels to a minimum and to direct exhaust fumes away from the user.

Inspecting the mufﬂer
Check regularly that the mufﬂer is complete and secured correctly.

ASSEMBLING AND ADJUSTMENTS

General

WARNING! Switch off the engine before carrying out any checks or maintenance.
Check that the blade and the blade guard are correctly ﬁtted before starting the machine.

Fitting the blade

Wind up the cutting depth feeding wheel.
Switch off the water tap. Disconnect the water hose from the blade guard.
Loosen the front nut and tilt the blade guard to service position.
WARNING! Check that the blade, blade ﬂange and blade shaft are undamaged. Clean the contact surfaces of the blade and the blade ﬂange. Make sure the blade and the ﬂanges are clean and free of dirt and debris before mounting the blade on the machine.
Check the blade’s direction of rotation. The arrow on the blade indicates the direction of rotation.
Fit the blade on the blade shaft (A). Fit the blade ﬂange (B) over the blade. Make sure that locking pin on ﬂange (A) passes through the blade and into the ﬂange (B). Tighten the screw (C) properly using the supplied spanner.
Reﬁt the blade guard and water hose in reverse order as set out for dismantling.

Handle height
The height of the lever can be adjusted in height.

Loosen the screw. Set handle to most comfortable working height. Tighten the screw.
Cutting depth indicator
The indicator must be calibrated before it is taken into use.
Wind down the blade so that it barely touches the ground.
Loosen the screw. Position the indicator arrow to “0”. Tighten the screw.

Parking brake

Apply the parking brake.

General

Diamond blades consist of a steel core provided with segments that contain industrial diamonds.
Always use a sharp diamond blade.
The blades should be marked with the same or a higher speed than that stated on the machine’s rating plate.
Never use blades other than original blades designed for the machine.

Water cooling
Water cooling must always be used. This cools the blades and increases their life and prevents dust build-up.

Diamond blades for different materials

WARNING! Never use a blade for any other materials than that it was intended for.
Husqvarna has a wide range of wet cutting blades for ﬂoor and wall cutting, including blades for everything from fresh to hardened concrete in different hardness classes as well as a comprehensive range of asphalt blades. Check with your Husqvarna dealer to see which blades are best suited for your usage.

Checking the blade

Check that the blade and the blade guard is not damaged or cracked. Replace the blade or the blade guard if it has been exposed to impact or is cracked. Never use a damaged or worn blade.
Check that the right amount of water reaches the blade.

Transport and storage

Inspect new blades for transport or storage damage.
The blade should be removed from the machine after use and stored well. Store the blade dry.

FUEL HANDLING

General

WARNING! Running an engine in a conﬁned or badly ventilated area can result in death due to asphyxiation or carbon monoxide poisoning.
Fuel and fuel fumes are highly ﬂammable and can cause serious injury when inhaled or allowed to come in contact with the skin. For this reason observe caution when handling fuel and make sure there is adequate ventilation.The exhaust fumes from the engine are hot and may contain sparks which can start a ﬁre. Never start the machine indoors or near combustible material!
Do not smoke and do not place any hot objects in the vicinity of fuel.

Fuel
NOTICE! The machine is equipped with a four-stroke engine. Make sure there is always sufﬁcient oil in the engine.

Gasoline

Use good quality unleaded gasoline.
The lowest recommended octane grade is 87 ((RON+MON)/2). If you run the engine on a lower octane grade than 87 so-called knocking can occur. This gives rise to a high engine temperature and increased bearing load, which can result in serious engine damage.

Engine oil

Check the oil level before starting the machine. A too low oil level can cause serious damage to the engine. See instructions in the section “Maintenance”.
Never use oil intended for two-stroke engines.

Fueling

WARNING! Always stop the engine and let it cool for a few minutes before refueling.
When refuelling, open the fuel cap slowly so that any excess pressure is released gently.
Clean the area around the fuel cap.
Tighten the fuel cap carefully after refueling.
Move the machine at least 10 ft (3 m) from the refuelling point before starting it.

Never start the machine:

If you have spilled fuel or engine oil on the machine, wipe off the spillage and allow remaining fuel to evaporate.
If you have spilled fuel on yourself or your clothes, change your clothes. Wash any part of your body that has come in contact with fuel. Use soap and water.
If the machine is leaking fuel. Check regularly for leaks from the fuel cap and fuel lines.

Transport and storage

Store and transport the machine and fuel so that there is no risk of any leakage or fumes coming into contact with sparks or open ﬂames, for example, from electrical machinery, electric motors, electrical relays/switches or boilers.
When storing and transporting fuel always use approved containers intended for this purpose.

Long-term storage

When storing the machine for long periods the fuel tank must be emptied. Contact your local gas station to ﬁnd out where to dispose of excess fuel.

OPERATING

Protective equipment

General
Do not use the machine unless you are able to call for help in the event of an accident.

Personal protective equipment
You must use approved personal protective equipment whenever you use the machine. Personal protective equipment cannot eliminate the risk of injury but it will reduce the degree of injury if an accident does happen. Ask your dealer for help in choosing the right equipment.

WARNING! The use of products such as cutters, grinders, drills, that sand or form material can generate dust and vapors which may contain hazardous chemicals. Check the nature of the material you intend to process and use an appropriate breathing mask.
Long-term exposure to noise can result in permanent hearing impairment. So always use approved hearing protection. Listen out for warning signals or shouts when you are wearing hearing protection. Always remove your hearing protection as soon as the engine stops.

Always wear :

Approved protective helmet.
Approved hearing protection.
Protective goggles or a visor.
Breathing mask.
Tight-ﬁtting, heavy-duty and comfortable clothing that permits full freedom of movement.
Boots with steel toe-caps and non-slip sole

Other protective equipment

IMPORTANT! Sparks may appear and start a ﬁre when you work with the machine. Always keep ﬁre ﬁghting equipment handy.

Fire Extinguisher.
Always have a ﬁrst aid kit nearby.

General safety precautions
This section describes basic safety directions for using the machine. This information is never a substitute for professional skills and experience.

Please read the operator’s manual carefully and make sure you understand the instructions before using the machine.
Keep in mind that the operator is responsible for accidents or hazards occuring to other people or their property.
The machine must be kept clean. Signs and stickers must be fully legible.

Always use common sense
It is not possible to cover every conceivable situation you can face. Always exercise care and use your common sense. If you get into a situation where you feel unsafe, stop and seek expert advice. Contact your dealer, service agent or an experienced user. Do not attempt any task that you feel unsure of!

WARNING! The machine can be a dangerous tool if used incorrectly or carelessly, which can cause serious or fatal injury to the operator or others.
Never allow children or other persons not trained in the use of the machine to use or service it.
Never allow anyone else to use the machine without ﬁrst ensuring that they have read and understood the contents of the operator’s manual.
Never use the machine if you are fatigued, while under the inﬂuence of alcohol or drugs, medication or anything that could affect your vision, alertness, coordination or judgement.
WARNING! Unauthorized modiﬁcations and/or accessories may lead to serious injury or death to the user or others. Under no circumstances may the design of the machine be modiﬁed without the permission of the manufacturer.
Do not modify this product or use it if it appears to have been modiﬁed by others.
Never use a machine that is faulty. Carry out the safety checks, maintenance and service instructions described in this manual. Some maintenance and service measures must be carried out by trained and qualiﬁed specialists. See instructions under the heading Maintenance.
Always use genuine accessories.
Your warranty may not cover damage or liability caused by the use of non-authorized accessories or replacement parts.
WARNING! This machine produces an electromagnetic ﬁeld during operation. This ﬁeld may under some circumstances interfere with active or passive medical implants. To reduce the risk of serious or fatal injury, we recommend persons with medical implants consult their physician and the medical implant manufacturer before operating this machine.

Work area safety

Observe your surroundings to ensure that nothing can affect your control of the machine.
Ensure that no one/nothing can come into contact with the cutting equipment or be hit by parts if the blade breaks.
Do not use the machine in bad weather, such as dense fog, heavy rain, strong wind, intense cold, etc. Working in bad weather is tiring and can lead to dangerous conditions, e.g. slippery surfaces.
Never start to work with the machine before the working area is clear and you have a ﬁrm foothold. Look out for any obstacles with unexpected movement. Ensure when cutting that no material can become loose and fall, causing injury to the operator.Take great care when working on sloping ground.
Ensure that the working area is sufﬁciently illuminated to create a safe working environment.
Make sure that no pipes or electrical cables are routed in the working area or in the material to be cut.
Make sure that electrical cables within the working area are not live.

Basic working techniques

WARNING! The bladeshaft rotates when the engine is cranked or started.
This machine is designed and intended for cutting of fresh and hardened concrete in different hardness classes and of asphalt. Use in any other way is considered as contrary to the intended use.
Always saw in a manner that permits easy access to the machine stop.
Check that no tools or other objects have been left lying on the machine.
Never leave the machine unsupervised with the motor running.
Always check that the blade guard is ﬁtted correctly before starting the machine. Never cut without using the blade guard.
Clearly mark out all cuts to be made before you start sawing, plan these so they can be carried out without danger to persons or the machine.
Do not turn, rotate or move the machine sideways while the blade is rotating.
Firmly secure or anchor concrete blocks before cutting. The heavy weight of cut material can cause both extensive damage to the machine and serious personal injury if it cannot be moved under controlled conditions.
Make sure that there is always another person close at hand when you use the machines, so that you can call for help if an accident should occur.

Transport and storage

The machine is equipped with transportation wheels, and can easily be transported without the engine running. Make sure that the blade is in the top position before moving the machine.
Remove the blade before transportation or storage of the machine.
Observe care when lifting. You are handling heavy parts, which imply the risk of pinch injuries or other injuries.
Always use the machine mounted lifting eye when lifting.
Secure the equipment during transportation in order to avoid transport damage and accidents.
For transport and storage of fuel, see the section “Fuel handling”.
For transport and storage of Blades, see the section “Blades”.
Store the equipment in a lockable area so that it is out of reach of children and unauthorized persons.
If there is a risk of freezing, the machine must be drained of any remaining water.

STARTING AND STOPPING

Before starting

WARNING! Please read the operator’s manual carefully and make sure you understand the instructions before using the machine.
Wear personal protective equipment. See instructions under the heading ”Personal protective equipment”.
Make sure no unauthorised persons are in the working area, otherwise there is a risk of serious personal injury.
Perform daily maintenance. See instructions in the section “Maintenance”.
Fill the water tank or connect the machine to a water supply.
Mark the cuts to be made.
Front pointer must be checked for alignment with blade.
Lay a straight edge along inner ﬂange. Align the front pointer to the straight edge. If required, adjust the front pointer by loosening the nuts that hold the guide wheel in place. Align the guide wheel to the straight edge and retighten the nuts.
Lower the front guide and align the machine with the marking.

Starting

Start the engine
Read the operator’s manual supplied by the engine manufacturer.

Start the cutting

Open the water tap.
Check that the water tubing in the blade guard is open and that each side of the blade has an adequate supply of water.
Test the water supply for pressure and quantity (ﬂow) before starting the saw.
Run the engine on full throttle.
Lower the wheel locking control for setting of cutting depth.
Saw only as deep as the job speciﬁcations require. Sawing deeper than required will add excessive wear to the blade and machine.
Make a guiding cut, approx 20-30mm (1inch) deep.
Cut increments of 50mm (2inches) deep until cutting depth speciﬁcation is reached. This is known as ”step cutting”.
Raise the wheel locking control for setting of the cutting depth.
Saw only in a straight line. Mark cutting line clearly so that the saw operator can follow cutting line without difﬁculty.
Slowly push the machine forwards. Make sure that the front guide and the blade do not deviate from the marking.
NOTICE! Saw should NOT be twisted from side to side to force blade back on line.

Stopping
Stop the cutting

Lower the wheel locking control for setting of cutting depth. Unwind the blade from the groove.
Raise the wheel locking control for setting of the cutting depth.
Switch off the water tap.

Stop the engine

Read the operator’s manual supplied by the engine manufacturer.
Press the machine stop and check that the engine stops

MAINTENANCE

General

WARNING! The user must only carry out the maintenance and service work described in this manual. More extensive work must be carried out by an authorized service workshop.
Switch off the engine before carrying out any checks or maintenance.
Wear personal protective equipment. See instructions under the heading ”Personal protective equipment”.
The life span of the machine can be reduced and the risk of accidents can increase if machine maintenance is not carried out correctly and if service and/or repairs are not carried out professionally. If you need further information please contact your nearest servicing dealer.
Let your Husqvarna dealer regularly check the machine and make essential adjustments and repairs.

Maintenance schedule
In the maintenance schedule you can see which parts of your machine that require maintenance, and with which intervals it should take place. The intervals are calculated based on daily use of the machine, and may differ depending on the rate of usage.

Daily Maintenance
Cleaning
External cleaning
Air filter
Sediment cup
Functional inspection
General inspection
Engine oil
Drive belt
Machine stop*
Blade guards*
Muffler*
Blade**
Lubrication
Blade shaft, daily
Grease nipple for depth adjustment system daily

*See instructions in the section “Machine’s safety equipment”.
** See instructions in the section “Blades” and “Assembly and settings”.

Cleaning
External cleaning

Check that all couplings, connections and cables are intact and free from dirt.
The blade is cooled by water being sprayed through small holes in the blade guard. Make sure that these small holes are unblocked so that the blade is properly cooled.

Air ﬁlter
For cleaning and change of air ﬁlter, read the operator’s manual supplied by the engine manufacturer.

The air ﬁlter may need cleaning 2-3 times per day in extremely dusty environments.
A damaged air ﬁlter must always be replaced.
CAUTION! The ﬁlter must not be cleaned with compressed air, this will damage the ﬁlter. Filters can be vacuumed out for cleaning but avoid hitting or dragging items across the surface as this will damage the ﬁlter.
Paper ﬁlters are to be disposed of correctly and replaced.
A polyester ﬁlter can be cleaned via vacuuming or low pressure washing.
Do not use high pressure washing, this will damage the ﬁlter.
A damaged air ﬁlter must always be replaced.
A washed ﬁlter must be 100% dry before being placed back onto the equipment.

Spark plug

If the machine is low on power, difﬁcult to start or runs poorly at idle speed: always check the spark plug ﬁrst before taking other steps.
Ensure that the spark plug cap and ignition lead are undamaged to avoid the risk of electric shock.
If the spark plug is dirty, clean it and at the same time check the electrode gap. Replace if necessary. See the supplied instruction manual for the engine.
CAUTION! Always use the recommended spark plug type! Use of the wrong spark plug can damage the piston/cylinder.
These factors cause deposits on the spark plug electrodes, which may result in operating problems and starting difﬁculties.
An incorrect fuel mixture (too much or incorrect type of oil).
A dirty air ﬁlter.

Functional inspection

General inspection
Check that nuts and screws are tightened.

Engine oil

CAUTION! Remember that oil can pose a hazard to health and the environment. Follow local regulations for disposal and recycling.
For change of engine oil, read the operator’s manual supplied by the engine manufacturer.

Checking the engine’s oil level.

The engine must be placed in a horizontal position when checking the oil level. Dismantle the blade or take other measures to be able to tilt the machine so that the engine is placed in a horizontal position.
Check oil level and top up if necessary. The oil level must never be below the lower mark on dipstick, see engine manual.
For the best result and function use HUSQVARNA engin oil.
When HUSQVARNA engine oil is not available another high grade engine oil can be used. Use engine oil of quality SAE 10W-30, class API, MS, SD, SE or higher.
Never use oil intended for two-stroke engines.

Drive belt

NOTICE! Do not over-tension the drive belt.
Check that drive belt is not damaged and is not visibly defective.

Tensioning the drive belt
The tension of a new drive belt must be readjusted after one or two tanks of fuel have been used.

Loosen the beltguard screws. Remove the cover.
Loosen the screws holding the engine in place.
Turn the tension screw a quarter turn. the engine will be pushed towards the rear, and the belt is tensioned.
Make sure that the belt pulleys are parallel and aligned with each other. Tighten the screws holding the engine and then unscrew the tension screw 2 turns to prevent it coming into contact with the engine block. Reﬁt the belt guard and tighten the screws holding the belt guard in place.

Fuel system

General

Check that the fuel cap and its seal are not damaged.
Check the fuel hose. Replace if necessary.

Greasing

Blade shaft
Grease the blade shaft daily. Connect the grease gun and pump 3-5 strokes or until grease can be seen at the edges. Only use DIN 51825 grease classiﬁcation K2K-30 or K3K-30.

Grease nipple for depth adjustment system
Lubricate the grease nipples for setting of the cutting depth daily.

Nut for feeding of cutting depth
Grease the feeding screw a couple of cm above and below the nut and adjust the saw up and down a couple of times to spread the grease.

Worn product
This machine has the prerequisites to last for many years. This minimizes the machine’s environmental impact. Perform service and maintenance according to the instructions in this manual. This way the engine will last longer and the hazardous emissions are minimized.
When the machine is worn out it should be disposed of for recycling or scrapping. Follow local regulations for disposal and recycling.
Main materials

Engine
Aluminium (AL), Steel (AC), Copper (CU), Polyamide (PA)
Machine
Steel (AC), Fonte (FT), Aluminium (AL).

TECHNICAL DATA

Technical data
FS 400 LV

| 18/450| 20/500
---|---|---
Blade size – max, inch/mm| 18/450| 20/500
Cutting depth – max, inch/mm| 6.5/162| 7.5/187
The rotation speed of the spindle (at engine speed 3700 rpm), rpm| 3000
Arbor size, inch/mm| 1/25.4
Blade fl ange diameter, inch/mm| 3.5/89
Engine oil| SAE 10W-30, class API, MS, SD, SE or higher.
Weight
Machine with empty tanks, lb/kg| 229/104| 236/107
Operating weight, lb/kg| 298/135| 320/145
Dimensions (LxWxH), inch/mm| 42.9×24.2×39.0/

1090x615x990

| 44.1×24.2×39.0/

1120x615x990

Noise emissions (see note 1)

Note 1: Noise emissions in the environment measured as sound power (LWA) in conformity with EC directive 2000/14/EC.
Note 2: Noise pressure level according to EN 13862. Reported data for noise pressure level has a typical statistical dispersion (standard deviation) of 4.0 dB(A).
Note 3: Vibration level according to EN 13862. Reported data for vibration level has a typical statistical dispersion (standard deviation) of 1.5 m/s2.

US WARRANTY STATEMENT

WARRANTY POLICY
All warranty claims will be determined after inspection at a designated facility. A Returned Goods Authorization is required for all warranty claims. Contact Husqvarna Customer Service Department at 800-845-1312 for an RGA. The customer must prepay the freight and absorb any labor expense required to return or replace a product submitted for warranty consideration. Husqvarna will pay return shipping expenses for repaired or approved replacement products.

EQUIPMENT
Equipment manufactured by Husqvarna is warranted to be free from manufacturing defects in normal service for a period of two (2) years from date of purchase by the original consumer purchaser. Component manufacturers offer separate warranty periods. Call Technical Services at 800-288-5040 for complete information.

Our obilgation under this warranty is expressly limited to the replacement or repair at Husqvarna Construction Products North America, Olathe, Kansas 66061, or at a service facility designated by us, of such part or parts as inspection shall disclose to have been defective.

This warranty does not apply to defects caused by damage, unreasonable use, faulty repairs made by others than an approved Husqvarna servicing dealer, or defects cacused by failure to provide reasonable maintenence, while in the possession of the consumer. Further, the warranty is void if the product, or any of its components, are altered or modiﬁed by the consumer purchaser, or if the product is used in an inappropriate manner or with tools not recommended by the manufacturer.

Exceptions: Drill motors – 3 months, Wall saws – 1 year, Power cutters – 3 months, DM230 – 1 year, DM225 – 3 months, Gyro systems – 1 year, CD40 system – 1 year, DS160 C – 1 year, Smart box – 1 year, CS2515 – 1 year, PP455 E – 1 year, PP345 E – 1 year, HP40 – 1 year.
Wear items: Filters, spark plugs, bearings*, belts, wheels* and wear pads.
Except IntelliSeal™ system. **Except delamination.

www.husqvarnacp.com
US – Original instructions, CA – Instructions d’origine, UE – Instrucciones originales