Stihl SR 430, SR 450 Instruction Manual

{

STIHL SR 430, 450

Instruction Manual Notice d’emploi

G Instruction Manual

1 - 39

F Notice d’emploi

41 - 84

Original Instruction ManualPrinted on chlorine-free paper

Printing inks contain vegetable oils, paper can be recycled.

0458-454-8221-B. M0-2.B10.MET.

0000002505_003_GB

SR 430, SR 450

English

{

Contents

Dear Customer, Thank you for choosing a quality

engineered STIHL product. This machine has been built using

modern production techniques and comprehensive quality assurance. Every effort has been made to ensure your satisfaction and troublefree use of the machine.

Please contact your dealer or our sales company if you have any queries concerning your machine.

Your

Hans Peter Stihl

Guide to Using this Manual 2 Safety Precautions and Working

Techniques 2 Assembling the Unit 9 Adjusting the Throttle Cable 11 Harness 11 Fuel 12 Fueling 13 Information Before You Start 14 Starting / Stopping the Engine 14 Operating Instructions 17 Calculating Required Quantity of

Solution 17 Metering Unit 18 Dusting and Spreading Mode 21 Filling the Container 23 Working 24 After Finishing Work 25 Storing the Machine 26 Replacing the Air Filter 26 Engine Management 27 Adjusting the Carburetor 27 Spark Plug 28 Engine Running Behavior 29 Replacing the Starter Rope and

Rewind Spring 29 Inspections and Maintenance by

Dealer 31 Maintenance and Care 32 Main Parts 34 Specifications 36 Special Accessories 37

Maintenance and Repairs 37 STIHL Limited Emission Control

Warranty Statement 37

SR 430, SR 450

English

Pictograms

All the pictograms attached to the machine are shown and explained in this manual.

Symbols in text

Engineering improvements

STIHL's philosophy is to continually improve all of its products. For this reason we may modify the design, engineering and appearance of our products periodically.

Therefore, some changes, modifications and improvements may not be covered in this manual.

Observe all applicable local safety regulations, standards and ordinances.

If you have not used this power tool model before: Have your dealer or other experienced user show you how to operate your power tool or attend a special course in its operation.

Minors should never be allowed to use a power tool.

Keep bystanders, especially children, and animals away from the work area.

When the power tool is not in use, shut if off so that it does not endanger others. Secure it against unauthorized use.

The user is responsible for avoiding injury to third parties or damage to their property.

Do not lend or rent your power tool without the instruction manual. Be sure that anyone using it understands the information contained in this manual.

The use of noise emitting power tools may be restricted to certain times by national or local regulations.

Do not operate your sprayer if any of its components are damaged. Pay special attention to the tightness of the container (no leaks).

Operate the unit only if it is complete and properly assembled.

Do not use a pressure washer to clean the unit. The solid jet of water may damage parts of the unit.

Physical Condition

To operate the power tool you must be rested, in good physical condition and mental health. If you have any condition that might be aggravated by strenuous work, check with your doctor before operating a power tool.

Persons with pacemakers only: The ignition system of your power tool produces an electromagnetic field of a very low intensity. This field may interfere with some pacemakers. To reduce health risks, STIHL recommends that persons with pacemakers consult their physician and the pacemaker manufacturer before operating this tool.

Do not operate the power tool if you are under the influence of any substance (drugs, alcohol) which might impair vision, dexterity or judgment.

Applications

The sprayer is suitable for applying fungicides, herbicides and pesticides at ground level. Spraying overhead is

Guide to Using this Manual

Warning where there is a risk of an accident or personal injury or serious damage to property.

Caution where there is a risk of damaging the machine or its individual components.

Safety Precautions and Working Techniques

Special safety precautions must be observed when working with the power tool.

It is important you read and understand the instruction manual before using your power tool for the first time and keep the manual in a safe place for future reference. Non-observance of the safety precautions may result in serious or even fatal injury.

SR 430, SR 450

English

possible with units equipped with a pressure pump. Typical areas of application are in fruit, vegetable, wine and crop growing, plantations, flower growng, grassland and forestry.

Only use plant protection products that are specifically approved for use in sprayers/mistblowers.

Do not use your machine for any other purpose because of the increased risk of accidents and damage to the machine. Never attempt to modify the unit in any way since this may result in accidents or damage to the unit.

Accessories and Spare Parts

Only use parts and accessories that are explicity approved for this power tool by STIHL or are technically identical. If you have any questions in this respect, consult a servicing dealer. Use only high quality parts and accessories in order to avoid the risk of accidents and damage to the machine.

STIHL recommends the use of genuine STIHL replacement parts. They are specifically designed to match your model and meet your performance requirements.

Never attempt to modify your power tool in any way since this may increase the risk of personal injury. STIHL excludes all liability for personal injury and damage to property caused while using unauthorized attachments.

Clothing and Equipment

Wear proper protective clothing and equipment when using, filling and cleaning the sprayer. Follow the chemical manufacturer's instructions with respect to protective equipment.

Immediately change work clothes contaminated with plant control chemicals.

If you are spraying overhead, wear impermeable head covering.

Do not wear sandals or go barefoot.

Breathing plant control chemicals may endanger your health. Always wear a suitable respirator to protect yourself against health risks and allergic reactions. Observe warnings in the directions for use of the plant protection product and all applicable local safety regulations, standards and ordinances.

Handling of Chemicals

Read the instructions supplied with the plant control chemical prior to use. Follow the instructions with respect to mixing, using, personal protection equipment, storage and disposal.

Observe legal requirements for handling plant control chemicals.

Plant control chemicals may contain substances that are harmful to humans, animals, plants and the environment –

risk or poisoning and risk of serious or fatal injuries!

Plant control chemicals may be used only by persons trained in their handling and the appropriate first-aid measures.

Keep instructions or label of the plant control chemical available at all times in order to inform the doctor about the chemical concerned in an emergency.

Clothing must be snug-fitting but allow complete freedom of movement.

For some chemicals it is necessary to wear impermeable coveralls.

Avoid any clothing, scarves, neckties, jewellery or anything that could get into the air intake. Tie up and confine long hair (e.g. with a hair net, cap, hard hat, etc.).

Wear impermeable safety boots with a non-slip sole which are resistant to plant control chemicals.

Wear safety glasses, respirator and hearing protection, e.g. earplugs or ear muffs.

Wear impermeable gloves resistant to plant control chemicals.

SR 430, SR 450

English

In an emergency, follow the chemical manufacturer's instructions provided or on the label.

Mixing the spray solution

Mix the plant protection product strictly in accordance with the manufacturer's instructions – incorrect mixtures may produce toxic fumes or explosive solutions.

– Never spray liquid plant control

chemicals undiluted.

– Prepare solution and fill the

container outdoors only or in wellventilated locations.

– Only prepare sufficient solution for

the job in hand so that nothing is left over.

– Mix different chemicals only in

accordance with the manufacturer's instructions – incorrect mixtures may produce toxic fumes or explosive solutions.

– Do not mix different plant protection

products unless such a mixture is approved by the manufacturer.

Filling the Container – Stand the power tool on a level

surface – do not fill the container above the maximum mark.

– To reduce the risk of injury, do not

fill the unit while wearing it on your back.

– Close the valve lever before filling.

– When filling from central water

supply, do not immerse the end of the hose in the solution – sudden low pressure in the system may cause the solution to be sucked back into the water supply.

– Before filling the container with

spray solution, carry out test run with fresh water and check all parts of the sprayer for leaks.

– After filling, fit the filler cap and

tighten it down firmly.

Using the unit – Work only in the open or in very well

ventilated locations, e.g. open greenhouses.

– Do not eat, drink or smoke while

working with plant control chemicals.

– Never blow through nozzles or other

components by mouth.

– Avoid contact with plant control

chemicals – immediately change clothing contaminated with plant control chemical.

– Do not spray in windy conditions. Unfavorable weather conditions may

result in an incorrect concentration of the plant protection product. Overdosing may damage plants and the environment. Under-dosing may result in unsuccessful plant treatment.

In order to reduce the risk of damage to the environment and plants, do not operate the sprayer if:

– in windy conditions – at temperatures above 25°C in the

shade

– in direct sunlight In order to reduce the risk of accidents

and damage to the power tool, never operate the power tool with:

– flammable liquids – viscous or sticky liquids – caustic or corrosive chemicals – liquids hotter than 50°C

Storage – During work breaks, do not leave

the power tool in the hot sun or near any heat source.

– Do not store spray solution in the

container for longer than one day.

– Store and transport spray solution

only in approved containers.

– Never store the spray solution in

containers intended for foods, drinks or animal feed.

– Do not store spray solution with

foods, drinks or animal feed.

– Keep spray solution out of the reach

of children and animals.

– Store the unit empty and clean. – Store the spray solution and unit in

a place secured against unauthorized use.

– Store the spray solution and unit in

a dry place protected from frost.

SR 430, SR 450

English

Disposal

Never dispose of residual chemicals or contaminated rinsing solutions in waterways, drains, sewers, street gutters or manholes.

– Dispose of residual solution and

used containers in accordance with local waste disposal regulations.

Transporting the Unit

Always stop the engine. Transporting in a vehicle: – Properly secure your power tool to

prevent turnover, fuel spillage and damage.

– The container must be empty and

clean.

Fueling

Always shut off the engine before refueling.

Do not fuel a hot engine – fuel may spill and cause a fire.

Always remove the power tool from your back and put it on the ground before refueling. Fuel the unit only when it is standing securely on the ground.

Open the bayonet-type fuel cap carefully to allow any pressure build-up in the tank to release slowly and avoid fuel spillage.

Fuel your power tool only in wellventilated areas. If you spill fuel, wipe the machine immediately – if fuel gets on your clothing, change immediately.

Bayonet fuel cap

Never use a tool to open or close the bayonet-type fuel cap. This may damage the cap and cause fuel leakage.

Close the bayonet-type fuel cap carefully after refueling.

Before starting

Check that your power tool is properly assembled and in good condition, especially if it has been subjected to unusually high loads for which it was not designed (e.g. heavy impact or a fall).

– The setting lever must move easily

to STOP or 0

– Throttle trigger must move freely

and spring back to the idle position when released.

– Check that the spark plug boot is

secure – a loose boot may cause arcing that could ignite combustible fumes and cause a fire.

– Check the fuel system for leaks. – Check condition and tightness of

container, hose and metering unit.

– Check condition of harness straps

and replace damaged or worn straps.

To reduce the risk of accidents and personal injury, do not operate your

power tool if it is not properly assembled and in good condition.

For emergencies: Practise removing and putting down the machine as you would in an emergency. To avoid damage, do not throw the machine to the ground when practising.

Starting the engine

Start the engine at least 3 meters from the fueling spot, outdoors only.

Your power tool is designed to be operated by one person only. Do not allow other persons in the work area – even when starting.

Start the engine as described in the instruction manual.

Place the unit on level ground, make sure you have secure footing, hold the unit securely.

If an assistant is required to put the power tool on your back, make sure that

Gasoline is an extremely flammable fuel. Keep clear of naked

flames. Do not spill any fuel – do not smoke.

Check for leakage. To reduce the risk of seri-

ous of fatal burn injuries, do not start or

run the engine until leak is fixed.

SR 430, SR 450

English

– the engine is running at idle speed – the assistant is not standing in the

area of the exhaust outlet and breathing toxic fumes

– the valve lever and, on SR 450 only,

the metering lever is closed

– the assistant is not standing in the

area of the outlet nozzle

– the assistant must leave the work

area immediately after you have put the power tool on your back.

Holding and Controlling the Power Tool

Carry the unit on your back with both harness straps – do not hang it over one shoulder. Hold and control the blower tube with your right hand on the control handle – even if you are left-handed.

Walk slowly forwards as you work – observe the nozzle outlet at all times – do not walk backwards – risk of

stumbling.

Keep the power tool and container upright. To avoid the risk of chemical leaking from the container and causing injury,do not bend forwards.

Dusting and spreading mode – SR 450 only

The dusting and spreading mode can be used for powder or dry granulate up to a grain size of 5 mm.

Observe legal requirements for handling the chemicals.

Observe the directions for use or the label of the plant protection product.

Using the unit

Electrostatic charging with sparking can occur when working with the dusting and spreading attachment.

The risk is greatest

– in extremely dry weather conditions – when using powdered products,

which create a highly concentrated dust cloud.

To reduce the risk of accidents and damage to the power tool, never operate it with explosive or combustible materials.

Do not apply sulphur or compounds containing sulphur since they are highly explosive and have a very low ignition point.

To reduce the risk of sparking, explosion or fire, make sure the discharge system is completely and properly mounted to the machine. It consists of a conductive wire in the spray tube connected to a metal chain. The metal chain must make contact with a conductive surface to dissipate electrostatic charges.

Do not operate your machine on a nonconductive surface (e.g. plastic, asphalt).

Never operate your machine with a missing or damaged discharge system.

During Operation

0002BA002 KN

0002BA001 KN

SR 430, SR 450

English

Do not direct the air blast towards bystanders since the air flow can blow

small objects at great speed. In the event of impending danger or in

an emergency, switch off the engine immediately by moving the setting lever to STOP or 0.

Throwing off power tool in an emergency:

– Open the fastener on the hip belt

(special accessory).

– Slip the straps off your shoulders. – Throw the power tool to the ground.

Never leave a running machine unattended.

Take special care in slippery conditions – damp, snow, ice, on slopes or uneven ground.

Watch out for obstacles: Be careful of refuse, tree stumps, roots and ditches which could cause you to trip or stumble.

Be particularly alert and cautious when wearing hearing protection because your ability to hear warnings (shouts, alarms, etc.) is restricted.

To reduce the risk of accidents, take a break in good time to avoid tiredness or exhaustion.

Work calmly and carefully – in daylight conditions and only when visibility is good. Stay alert so as not to endanger others.

Never work on a ladder or any other insecure support.

When working in open ground and gardens take special care to avoid harming small animals.

To reduce the risk of electrocution, never operate this power tool in the vicinity of live wires or power cables.

Always clean the spray container and hose system before changing to a different plant protection product.

To reduce the risk of serious or fatal injury from breathing toxic fumes,

ensure proper ventilation when working in trenches, hollows or other confined locations.

To reduce the risk of accidents, stop work immediately in the event of nausea, headache, visual disturbances (e.g. reduced field of vision), problems with hearing, dizziness, deterioration in ability to concentrate. Apart from other possibilities, these symptoms may be caused by an excessively high concentration of exhaust gases in the work area.

Operate your power tool so that it produces a minimum of noise and emissions – do not run the engine unnecessarily, accelerate the engine only for cutting.

To reduce the risk of fire, do not smoke while operating or standing near your power tool. Note that combustible fuel vapor may escape from the fuel system.

If your power tool is subjected to unusually high loads for which it was not designed (e.g. heavy impact or a fall), always check that it is in good condition before continuing work – see also "Before Starting". Check the fuel system in particular for leaks and make sure the safety devices are working properly. Do not continue operating your power tool if it is damaged. In case of doubt, have the machine checked by your servicing dealer.

After Finishing Work

Close the valve lever and, on SR 450 only, the metering lever.

Always shut off the engine before taking the power tool off your back.

After finishing work, put the power tool down on a level, non-flammable surface. To reduce the risk of fire, do not put it down near easily combustible materials (e.g. wood chips, bark, dry grass, fuel).

Check all machine components for leaks.

After finishing work, throughly clean the power tool and wash your hands, face and, if necessary, your clothes.

Keep other persons and animals away from the areas that have been sprayed and do not walk on them until the plant protection chemical has dried.

Vibrations

Prolonged use of the power tool may result in vibration-induced circulation problems in the hands ("white finger disease").

Your power tool produces toxic exhaust fumes as soon as the engine is running. These fumes may be colorless and odorless and contain unburned hydrocarbons and benzol. Never operate the power tool in enclosed or poorly ventilated locations.

SR 430, SR 450

English

No general recommendation can be given for the length of usage because it depends on several factors.

The period of usage is prolonged by: – Hand protection (wearing warm

gloves)

– Work breaks The period of usage is shortened by: – Any personal tendency to suffer

from poor circulation (symptoms: frequently cold fingers, tingling sensation)

– Low outside temperatures – Amount of gripping force (holding

the power tool tightly restricts circulation)

Users who use the machine periodically or for long periods or users who repeatedly experience corresponding symptoms (e.g., tingling sensation in fingers), should undergo a medical examination.

Maintenance and Repairs

Service the machine regularly. Do not attempt any maintenance or repair work not described in the instruction manual. Have all other work performed by a servicing dealer.

STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer. STIHL dealers are regularly given the opportunity to attend training courses and are supplied with the necessary technical information.

Only use high-quality replacement parts in order to avoid the risk of accidents and damage to the machine. If you have any questions in this respect, consult a servicing dealer.

STIHL recommends the use of genuine STIHL replacement parts. They are specifically designed to match your model and meet your performance requirements.

To reduce the risk of injury, always shut off the engine before carrying out any maintenance or repairs or cleaning the machine. – Exception: Carburetor and idle speed adjustments.

Do not turn the engine over on the starter with the spark plug boot or spark plug removed since there is otherwise a risk of fire from uncontained sparking.

Do not service or store your machine near open flames.

Check the fuel filler cap for leaks at regular intervals.

Use only a spark plug of the type approved by STIHL and make sure it is in good condition – see "Specifications".

Inspect the ignition lead (insulation in good condition, secure connection).

Check the condition of the muffler. To reduce the risk of fire and damage

to hearing, do not operate your machine if the muffler is damaged or missing.

Do not touch a hot muffler since burn injury will result.

Vibration behavior is influenced by the condition of the AV elements – check the AV elements at regular intervals.

Shut off the engine before rectifying problems.

Maintenance, replacement, or repair of the emission control devices and systems may be performed by any nonroad engine repair establishment or individual. However, if you make a warranty claim for a component which has not been serviced or maintained properly or if nonapproved replacement parts were used, STIHL may deny coverage.

For any maintenance please refer to the maintenance chart and to the warranty statement near the end of the instruction manual.

SR 430, SR 450

English

The combination wrench and screwdriver are in the supplied accessory bag.

Fitting the pleated hose on the blower tube

N Slide the wide hose clamp (1) onto

the blower tube (2) and line it up.

N Push the ring seal (3) (wide lip

facing left) onto the blower tube (2).

N Push the pleated hose (4) over the

ring seal (3).

N Slide the wide hose clamp (1) onto

the pleated hose (4).

N Secure the wide hose clamp (1) with

the screw (5) – the blower tube (2) must still rotate.

Fitting the pleated hose on the elbow – SR 430 only

N Slide the narrow hose clamp (6)

(bezel facing left) onto the elbow and line it up.

N Push the pleated hose (4) over the

elbow (7).

N Slide the narrow hose clamp (6)

onto the pleated hose (4).

N Secure the hose clamp (6) with the

screw (8) from the side facing the operator.

Fitting the antistatic system – SR 450 only

N Attach the antistatic wire (1) and

chain (2) to the blower housing with screw (3).

Assembling the Unit

Hose and throttle cable, and the metering unit's operating cable on the SR 450, come connected ready for use and must not be kinked while assembling the machine.

0002BA003 KN

0002BA004 KN

0002BA005 KN

0002BA006 KN

0002BA007 KN

0002BA054 KN

SR 430, SR 450

English

Fitting the pleated hose on the elbow – SR 450 only

N Push the antistatic wire (9) into the

pleated hose (4).

N Slide the narrow hose clamp (6)

(bezel facing left) onto the elbow and line it up.

N Push the antistatic wire (9) between

the ends of the narrow hose clamp (6).

N Push the pleated hose (4) over the

elbow (7).

N Slide the narrow hose clamp (6)

onto the pleated hose (4).

N Secure the hose clamp (6) with the

screw (8) from the side facing the operator – make sure the antistatic wire is positioned in the notch.

Adjusting and securing the control handle

N Put the machine on your back and

adjust the harness – see "Harness".

N Slide the control handle (1) along

the tube to the most comfortable position – distance between nozzle outlet (2) and the control handle (1) must be at least 500 mm (a).

N Secure the control handle (1) with

the screw (3).

N Use the retainer (4) to secure the

hose and throttle cable, and metering unit's operating cable on the SR 450, to the 6th pleat (arrow) on the pleated hose.

0002BA008 KN

0002BA009 KN

0002BA010 KN

0002BA011 KN

0002BA058 KN

0002BA012 KN

SR 430, SR 450

English

It may be necessary to correct the adjustment of the throttle cable after assembling the machine or after a prolonged period of operation.

Adjust the throttle cable only when the unit is completely and properly assembled.

N Set throttle trigger to the full throttle

position – as far as stop.

N Carefully rotate the screw in the

throttle trigger in the direction of the arrow until you feel initial resistance. Then rotate it another full turn.

Adjusting the harness

N Pull the ends of the straps

downward to tighten the harness.

N Adjust the harness so that the

backplate fits snugly and securely against your back.

Loosening the harness

N Lift the tabs of the sliding adjusters.

Disconnecting harness from backplate

N Pull the ring (1) out of the slot.

Adjusting the Throttle Cable

0002BA013 KN

Harness

373BA003 KN

373BA004 KN

0002BA055 KN

SR 430, SR 450

English

This engine is certified to operate on unleaded gasoline and with the mix ratio 50:1.

Your engine requires a mixture of highquality premium gasoline and highquality two-stroke air-cooled engine oil.

Use premium branded unleaded gasoline with a minimum octane rating of 89 RON.

Note: Models equipped with a catalytic converter require unleaded gasoline. A few tankfuls of leaded gasoline can reduce the efficiency of the catalytic converter by more than 50%.

Fuel with a lower octane rating may result in preignition (causing "pinging") which is accompanied by an increase in engine temperature. This, in turn, increases the risk of the piston seizure and damage to the engine.

The chemical composition of the fuel is also important. Some fuel additives not only detrimentally affect elastomers (carburetor diaphragms, oil seals, fuel lines etc.), but magnesium castings as well. This could cause running problems or even damage the engine. For this reason it is essential that you use only high-quality fuels!

Fuels with different percentages of ethanol are being offered. Ethanol can affect the running behaviour of the engine and increase the risk of lean seizure.

Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke aircooled engine oils for mixing.

We recommend STIHL 50:1 two-stroke engine oil since it is specially formulated for use in STIHL engines.

Do not use BIA or TCW (two-stroke water cooled) mix oils!

Use only STIHL 50:1 heavy-duty engine oil or an equivalent quality twostroke engine oil for the fuel mix in models equipped with a catalytic converter.

Take care when handling gasoline. Avoid direct contact with the skin and avoid inhaling fuel vapour.

The canister should be kept tightly closed in order to avoid any moisture getting into the mixture.

The fuel tank and the canister in which fuel mix is stored should be cleaned from time to time.

Fuel mix ratio

Only mix sufficient fuel for a few days work, not to exceed 3 months of storage. Store in approved safety fuel-canisters only. When mixing, pour oil into the canister first, and then add gasoline.

Dispose of empty mixing-oil canisters only at authorized disposal locations.

Fuel

Examples

Gasoline Oil (STIHL 50:1 or equiva-

lent high-quality oils)

liters liters (ml)

10.02(20) 5 0.10 (100) 10 0.20 (200) 15 0.30 (300) 20 0.40 (400) 25 0.50 (500)

SR 430, SR 450

English

Preparations

N Before fueling, clean the bayonet-

type fuel cap and the area around it to ensure that no dirt falls into the tank.

N Position the machine so that the fuel

cap is facing up.

Opening the bayonet-type fuel cap

N Press the bayonet-type fuel cap

down as far as stop, turn it counterclockwise (about 1/8 turn) and remove.

Filling up with fuel

Take care not to spill fuel while fueling and do not overfill the tank. STIHL recommends you use the STIHL filler nozzle for fuel (special accessory).

Closing the bayonet-type fuel cap

N Place the cap on the tank opening

and turn it slips into position.

N Press the fuel cap down by hand as

far as stop and turn it clockwise (about 1/8 turn) until it engages.

Change the fuel pickup body every year

N Drain the fuel tank. N Use a hook to pull the fuel pickup

body out of the tank and take it off the hose.

N Push the new pickup body into the

hose.

N Place the pickup body in the tank.

Fueling

Never use a tool to open or close the bayonet-type fuel cap. This may damage the cap and cause fuel leakage.

0002BA014 KN

0002BA015 KN

0002BA016 KN

SR 430, SR 450

English

Control handle

1 Setting lever 2 Throttle trigger 3 Throttle trigger interlock

Functions of setting lever

Run position F

Engine runs or is ready to start. Throttle trigger (2) can be moved to any position.

Stop position 0

Ignition is interrupted, engine stops. The setting lever (1) is not locked in this position. It springs back to the run position. The ignition is switched on again.

Throttle trigger limiter position

Travel of throttle trigger can be limited in two stages:

a 1/3 throttle b 2/3 throttle

To disengage the travel limiter, N return the setting lever (1) to the run

position F.

Throttle lock

The throttle trigger (2) can be locked in two positions:

a Full throttle b Half throttle

To disengage the lock, N return the setting lever (1) to the run

position F.

Before starting

N Close valve lever (1) for solution

feed.

Additionally on SR 450:

N Close the metering lever (2) for

dusting and spreading mode.

Starting the engine

N Observe safety precautions.

Information Before You Start

With the engine stopped and before starting, check the air intakes between the backplate and powerhead for blockages and clean if necessary.

0002BA017 KN

Not in all versions, country-specific

0002BA053 KN

0002BA059 KN

Starting / Stopping the Engine

Start your unit on a clean, dustfree surface only to ensure that no dust is sucked in.

0002BA060 KN

0002BA052 KN

SR 430, SR 450

English

N The setting lever must be on F

N Press the fuel pump bulb (3) at least

eight times – even if the bulb is filled with fuel.

Cold engine (cold start)

N Press in the choke knob (4) and turn

it to c.

Warm engine (warm start)

N Press in the choke knob (4) and turn

it to o.

Also use this setting if the engine has been running but is still cold.

Cranking

N Place the unit securely on the

ground and make sure that bystanders are well clear of the nozzle outlet.

N Make sure you have a firm footing:

Hold the unit with your left hand on the housing and put one foot against the base plate to prevent it slipping.

N Pull the starter grip slowly with your

right hand until you feel it engage and then give it a brisk strong pull. Do not pull out the starter rope to full length – it might otherwise break.

N Do not let the starter grip snap back.

Guide it slowly back into the housing so that the starter rope can rewind properly.

N Continue cranking until the engine

runs.

0002BA019 KN

0002BA020 KN

0002BA021 KN

0002BA022 KN

0002BA023 KN

SR 430, SR 450

English

As soon as the engine runs

N Pull the throttle trigger – the choke

knob (4) automatically returns to the run position (e).

At very low outside temperatures:

N Open throttle slightly – warm up the

engine for a short period.

Shut off the engine

N Move the setting lever in the

direction of 0 – the engine stops – the setting lever springs back to the on position.

Other hints on starting

Engine stalls in cold start position c or under acceleration

N Move the choke knob to o and

continue cranking until the engine runs.

Engine does not start in warm start position o

N Move the choke knob to c and

continue cranking until the engine runs.

If the engine does not start

N Check that all settings are correct. N Check that there is fuel in the tank

and refuel if necessary.

N Check that the spark plug boot is

properly connected.

N Repeat the starting procedure.

Fuel tank run until completely dry

N After refueling, press the fuel pump

bulb at least eight times – even if the bulb is filled with fuel.

N Set the choke knob according to

engine temperature.

N Start the engine.

0002BA024 KN

0002BA025 KN

SR 430, SR 450

English

During break-in period

A factory-new machine should not be run at high revs (full throttle off load) for the first three tank fillings. This avoids unnecessary high loads during the break-in period. As all moving parts have to bed in during the break-in period, the frictional resistances in the engine are greater during this period. The engine develops its maximum power after about 5 to 15 tank fillings.

During Operation

After a long period of full throttle operation, allow the engine to run for a short while at idle speed so that engine heat can be dissipated by the flow of cooling air. This protects enginemounted components (ignition, carburetor) from thermal overload.

After Finishing Work

Storing for a short period: Wait for the engine to cool down. Empty the fuel tank and keep the machine in a dry place, well away from sources of ignition, until you need it again. For longer out-ofservice perionds – see "Storing the Machine".

Determining surface area (m2)

In the case of ground crops, simply multiply the length of the field by its width.

The surface area of high-growing plants is calculated approximately by measuring the length of the rows and the average height of the foliage. The result is multiplied by the number of rows and then by two if both sides have to be treated.

The surface area in hectares is obtained by dividing the number of square meters by 10,000.

Example:

A field 120 meters long and 30 meters wide has to be treated with a pesticide.

Area: 120 m x 30 m = 3,600 m

3,600 / 10,000 = 0.36 ha

Determining quantity of active ingredient

Refer to the instructions supplied with the active ingredient to determine:

– Required quantity of active

ingredient for 1 hectare (ha).

– Concentration of active ingredient

(mix ratio).

Multiply the required quantity of active ingredient for 1 hectare by the area determined in hectares. The result is the quantity of active ingredient required for the area to be treated.

Example:

According to the maker’s instructions,

0.4 liters of active ingredient are required per hectare to obtain a concentration of 0.1%.

Quantity of active ingredient:

0.4 (l/ha) x 0.36 (ha) = 0.144 l

Determining quantity of solution

The quantity of solution required is calculated as follows:

TW = Quantity of active ingredient in l K = Concentration in % T

= Required quantity of solution in l

Example:

The calculated quantity of active ingredient is 0.144 liters. According to the maker’s instructions, the concentration is 0.1%.

Quantity of solution:

Determining walking speed

Carry out a trial run with the machine fueled and the container filled with water. Operate the spray tube (swing it

Operating Instructions Calculating Required

Quantity of Solution

x 100 = T

0.144 l x 100 = 144 l

0,1 %

SR 430, SR 450

English

back and forth) as for the real run described below. Determine the distance walked in one minute.

Also use the trial run to check the selected working width. The best working width for low-growing crops is 4–5 m. Mark the working width with stakes.

Dividing the distance walked in meters by the time in minutes gives you the walking speed in meters per minute (m/min).

Example:

The distance covered in one minute is 10 meters.

Walking speed:

Determining discharge rate

The setting of the metering unit is calculated as follows:

= Quantity of solution

= Walking speed

= Discharge rate

b = Working width A = Area Example:

The values determined above and a working width of 4 meters require the following setting on the metering unit:

Hectares (ha) have to be converted into m

(ha x 10,000 = m2).

To adjust the required discharge rate see "Metering Unit".

Valve lever

Solution feed is started and stopped with the valve lever (1).

N Position A (valve lever vertical, up)

– open

N Position B (valve lever horizontal,

down) – closed

Metering knobs

The scope of supply includes metering knobs which allow a wide range of different discharge rates.

10 m

= 10 m/min

1min

(l) x vb(m/min) x b(m)

= V

(l/min)

A (m2)

144 l x 10 (m/min) x 4m

= 1.6 l/min

3,600 m

Metering Unit

0002BA061 KN

SR 430, SR 450

English

– Standard metering knob (A) with

positions 1 to 5

– Fine metering knob (B) with

positions 1.0 to 2.3

– ULV metering knob

positions 0.5 to 0.8

Changing the metering knob

N Pull the existing metering knob up

and out of its seat.

N Push the new metering knob into its

seat as far as stop.

Fitting the strainer

The strainer supplied must always be fitted when the ULV metering knob is used.

N Push the strainer into its seat until it

snaps into position.

Removing

N Pry the strainer out of its seat – as

shown.

Adjusting the discharge rate

N Turn the metering knob (2) on the

nozzle (3) to obtain the required discharge rate – see tables.

The numbers on the metering knob must be lined up with the lug (4) under the knob.

Position "E" is used for emptying the container. Do not use this position for spraying – see "After Finishing Work".

Machines with pressure pump (special accessory)

On machines with a pressure pump, use only the supplied "fine" metering knob with settings 1.0 to 2.3 or the ULV metering knob with settings 0.5 to 0.8.

Discharge rate without pressure pump

Spray tube 0° to -30° to the horizontal

Included in the scope of supply or available as a special accessory depending on market

0002BA064KN

A B

0002BA065 KN

Included with ULV metering knob

SR 430

SR 450

0002BA066 KN

0002BA067 KN

0002BA027 KN

SR 430, SR 450

English

"Standard" meterng knob

"Fine" meterng knob

ULV metering knob

Discharge rate with pressure pump (special accessory)

Spray tube horizontal (0°)

"Fine" meterng knob

ULV metering knob

Checking flow rate

N Place the unit on the ground. N Fill the container with water up to 10

liter mark.

Machines without pressure pump

N Set the "standard" metering knob to

"5".

N Start the machine. N Hold the spray tube horizontally, run

the engine at full throttle, spray the contents of the container down to the 5 liter mark and note the time taken.

The time required to spray 5 liters fluid should be betweeen 110 and 140 seconds.

Machines with pressure pump (special accessory)

N Set the "fine" metering knob to 2.3. N Start the machine. N Hold the spray tube horizontally, run

the engine at full throttle, spray the contents of the container down to the 5 liter mark and note the time taken.

The time required to spray 5 liters fluid should be betweeen 90 and 120 seconds.

In case of deviations:

N Check the container, hose system,

metering knob and optional pressure pump for cantamination and clean if necessary.

N Check blower air intake and clean if

necessary.

N Check engine setting and correct if

necessary.

If there is no improvement, contact your dealer for assistance.