STIHL RLE 540 Efficient Electric Lawn Scarifier Instruction Manual

: June 4, 2024
: STIHL

STIHL RLE 540 Efficient Electric Lawn Scarifier

STIHL RLE 540 Efficient Electric Lawn Scarifier
product

Dear Customer,
Thank you for choosing STIHL. We develop and manufacture our quality products to meet our customers’ requirements. The products are designed for reliability even under extreme conditions.

STIHL also stands for premium service quality. Our specialist dealers guarantee competent advice and instruction as well as comprehensive service support.
We thank you for your confidence in us and hope you will enjoy working with your STIHL product.

Notes on the instruction manual

General

This instruction manual constitutes original manufacturer’s instructions in the sense of EC Directive 2006/42/EC.
STIHL is continually striving to further develop its range of products; we therefore reserve the right to make alterations to the form, technical specifications and equipment level of our standard equipment.

For this reason, the information and illustrations in this manual are subject to alterations.
This instruction manual may describe models that are not available in all countries.
This instruction manual is protected by copyright. All rights reserved, especially the right of reproduction, translation and processing using electronic systems.

Instructions for reading the instruction manual
Illustrations and texts describe specific operating steps.
All symbols which are affixed to the machine are explained in this instruction manual.

Viewing direction:
Viewing direction when “left” and “right” are used in the instruction manual:
the user is standing behind the machine and is looking forwards in the direction of travel.

Section reference:
References to relevant sections and subsections for further descriptions are made using arrows. The following example shows a reference to a section: (4.)

Designation of text passages:
The instructions described can be identified as in the following examples.
Operating steps which require intervention on the part of the user:

Release bolt (1) using a screwdriver, operate lever (2)…

General lists:

Use of the product for sporting or competitive events

Texts with added significance:
Text passages with added significance are identified using the symbols described below in order to especially emphasise them in the instruction manual:

Danger
Risk of accident and severe injury to persons. A certain type of behaviour is necessary or must be avoided.
Warning
Risk of injury to persons. A certain type of behaviour prevents possible or probable injuries.
Caution
Minor injuries or material damage can be prevented by a certain type of behaviour.
Note
Information for better use of the machine and in order to avoid possible operating errors.

Texts relating to illustrations:
Illustrations relating to use of the machine can be found in the front of this instruction manual.

The camera symbol serves to link the figures on the illustration pages with the corresponding text passages in the instruction manual.

Country-specific versions
STIHL supplies machines with different plugs and switches, depending on the country of sale.
Machines with European plugs are shown in the illustrations. Machines with other types of plug are connected to the mains in a similar way.

Machine overview

STIHL RLE 540 Efficient Electric Lawn Scarifier fig
1

Upper handlebar with controls
Cable clip
Rotary handle
Housing
Carrying handle
Motor hood
Rating plate with machine number
Discharge flap
Motorstop lever
ON button
Working depth rotary handle
Scarifying unit lever

For your safety

General

These safety regulations must be observed when working with the machine.
Read the entire instruction manual before using the machine for the first time. Keep the instruction manual in a safe place for future reference.
These safety precautions are essential for your safety, however the list is not exhaustive. Always use the machine in a reasonable and responsible manner and be aware that the user is responsible for accidents involving third parties or their property.
Make sure that you are familiar with the controls and use of the machine.
The machine must only be used by persons who have read the instruction manual and are familiar with operation of the machine. The user should seek expert and practical instruction prior to initial operation. The user must receive instruction on safe use of the machine from the vendor or another expert.
During this instruction, the user should be made aware that the utmost care and concentration are required for working with the machine.
Residual risks persist even if you operate this machine according to the instructions.

Risk of death from suffocation!
Packaging material is not a toy – danger of suffocation! Keep packaging material away from children.

Only give or lend the machine, including any accessories, to persons who are familiar with this model and how to operate it. The instruction manual forms part of the machine and must always be provided to persons borrowing it.

The machine must only be operated by persons who are well rested and in good physical and mental condition. If your health is impaired, you should consult your doctor to determine whether working with the machine is possible. The machine should not be operated after the consumption of alcohol, drugs or medications which impair reactions.
Make sure that the user is physically, sensorily and mentally capable of operating the machine and working with it. If the user is physically, sensorily or mentally impaired, the machine must only be used under supervision or following instructions by a responsible person.
Make sure that the user is of legal age or being trained under supervision in a profession in accordance with national regulations.

Intended use:
The machine is only intended for scarifying lawns. Its use for other purposes is not permitted and may be dangerous or result in damage to the machine.
The machine is intended for private use.

Caution – risk of accident!
Due to the physical danger to the user, the machine must not be used for the following applications (incomplete list):

Trimming bushes, hedges and shrubs
Cutting creepers
Caring for lawn roofs and balcony boxes
Shredding or chopping tree or hedge cuttings
Clearing paths (vacuuming, blowing)
Levelling earth mounds, e.g. mole hills
Transporting scarified material, except in the grass catcher box (accessory –not included in standard equipment) intended for this purpose.

For safety reasons, any modification to the machine, except the proper installation of accessories approved by STIHL, is forbidden and results in voiding of the warranty cover. Information regarding approved accessories can be obtained from your STIHL specialist dealer.
In particular, any tampering with the machine which increases the power output or speed of the engine or motor is forbidden.
It is not permitted to transport objects, animals or persons, particularly children, on the machine.
Only release the machine if it is on a level surface and cannot roll away by itself.
Particular care is required during use in public green spaces, parks, sports fields, along roads and in agricultural and forestry businesses.

Caution! Danger to health due to vibrations. Excessive exposure to vibrations can result in damage to the cardiovascular or nervous system, particularly in persons with cardiovascular problems. Please consult a physician if you experience symptoms that may have been caused by vibrational loads. Symptoms of this kind principally affect the fingers, hands or wrists and include (incomplete list):

numbness,
pain,
muscular weakness,
skin discolouration,
unpleasant tingling sensation.

Hold the handlebar tightly, but not tensed, with both hands in the designated locations during operation.
Plan your working times so that more severe physical strains over a longer period are avoided.

Warning – dangers caused by electrical current

Warning – risk of electric shock!

All power supply components (power cable, mains plug, ON/OFF switch, extension cable) must be free from damage and conform with the regulations for electrical safety.

Damaged cables, connectors and plugs, or power or extension electric cables that do not conform with regulations, must not be used. Therefore, check the power supply and electric or extension cable regularly for signs of damage or ageing (brittleness) before each use.
Only operate machine with fully uncoiled power cable.
Extension reels must always be fully unwound before use.
Never use a damaged extension cable. Replace defective cables with new ones and never repair extension cables.
Never use the machine if the cables are damaged or worn. Check the power cable in particular for damage and ageing.
Maintenance and repair work on power cables must only be performed by specially qualified technicians.
Danger of electric shock!
Do not connect a damaged cable to the mains and never touch a damaged cable before it has been disconnected from the mains. Damaged cables can result in contact with live parts.
Do not touch the scarifying unit (blades) until the machine has been disconnected from the mains.
Always ensure that the power cables used are adequately protected by a fuse.
Although the motor is splashproof, do not use the machine when it is raining or in a wet environment.
Only use extension cables that are insulated against moisture for outdoor use which are suitable for use with the machine (10.1).
Detach electric cables at the plug and socket and not by pulling on the electric cable.
Keep the electric or extension cable away from the blades when using the scarifier to avoid damagae that could result in contact with live parts.
In case of accident or malfunction, immediately switch off the scarifier and disconnect the mains plug.
If the power or extension cable has been damaged or tangled while using the machine (e.g. driven over), immediately switch off the scarifier and disconnect the mains plug. Check the cable and replace if necessary.
It must be noted that current fluctuations can damage the machine when it is connected to a power generator.
Only connect the machine to a power supply that is protected by means of a residual current-operated protective device with a release current of a maximum of 30 mA. Your electrician can provide further information.
For reasons of electrical safety, the electric cable must always be correctly installed on the handlebar.

Clothing and equipment

Always wear sturdy footwear with high-grip soles when working. Never work barefoot or, for example, in sandals.
Suitable safety glasses must be worn when working.
Also always wear sturdy gloves and tie up and secure long hair (headscaarf, cap, etc.) when performing maintenance and cleaning work or when transporting the machine.
Always wear long trousers and tight-fitting clothing when operating the machine.
Never wear loose clothes which may become caught on moving parts (control levers) – do not wear jewellery, ties or scarves.

Transporting the machine

Always wear protective gloves (4.3) in order to prevent injuries due to sharp-edged and hot components.
Switch off the machine prior to transport, disconnect the power cable, place the scarifying unit in the transport position and allow the blades to come to a standstill.
Only transport the machine once the motor has cooled down.
Take the weight of the machine into account and use suitable loading aids(loading ramps, lifters) if necessary.
Secure the machine and any machine components being transported (e.g. the grass catcher box available as an accessory) on the load floor using adequately dimensioned fastening material (belts, ropes, etc.).
Avoid contact with the blades when lifting and carrying the machine.
Observe the information in the section “Transport”. It describes how to lift and lash the machine. (12.1)
When transporting the machine, always observe regional legislation, especially regarding load security and the transport of objects on load floors.

Before operation

Make sure that only persons who are familiar with the instruction manual are permitted to use the machine.
Remove the packaging material and transport locks before using the machine for the first time.
Observe the instructions in section “Dangers caused by electrical current” 4.2).
Observe the local regulations regarding permitted operating times for gardening power tools with electric motors.
The machine must not be used on paved or gravelled surfaces where ejected material can cause injuries.
Carefully inspect the complete area on which the machine is to be used and remove any stones, sticks, wires, bones and other foreign objects which could be thrown up by the machine.
Obstacles (e.g. tree stumps, roots) can be easily overlooked in long grass.
For this reason, mark all foreign objects (obstacles) which are hidden in the lawn and cannot be removed before commencing work with the machine.
Remove the packaging material and transport locks before using the machine for the first time.
All faulty, worn or damaged parts must be replaced before using the machine. Replace any illegible or damaged danger signs and warnings on the machine. Your STIHL specialist has a supply of replacement stickers and all the other spare parts.

Risk of injury!
Worn or damaged parts (e.g. blunt blades) can affect the safety of the machine and result in injury to the user.
The machine must only be used in good operating condition. Therefore, before each use check whether

The machine is properly assembled.
The scarifying unit (blade shaft, blades, spacer bushings and fastening) are in perfect condition – in particular check for secure fastening, damage (notches or cracks) and wear.
The safety devices (e.g. discharge flap with rubber sheet, housing, handlebar, motorstop lever) are in perfect condition and working properly.
The grass catcher box (accessory – not included in standard equipment) is undamaged and correctly installed – a damaged grass catcher box must not be used.
Carry out any necessary work or consult a specialist dealer. STIHL recommends STIHL specialist dealers.

During operation

Never work when animals or people, particularly children, are in the danger area.
The switch and safety devices installed in the machine must not be removed or bypassed. In particular, never secure the motorstop lever to the handlebar (e.g. by tying it).
The handlebar must always be installed correctly and must not be modified. Never operate the machine with the handlebar folded down.
Never attach any objects to the handlebar (e.g. work clothing). Extension cables must never be wrapped around the handlebar.
Only work during the day or with good artificial light.
Do not operate the machine in the rain or during thunder storms, particularly when there is a risk of lightning strike.
The risk of accidents is higher if the ground is damp due to increased danger of slipping.
Particular caution should be exercised during working in order to prevent slipping. If possible, avoid using the machine when the ground is damp.
Do not leave the machine in the rain.
Switching on the machine:
Exercise care when switching on the machine and observe the instructions in the section “Operating the machine”.
Ensure that you keep your feet far enough away from the blades.
Always place the scarifying unit in the transport position before starting it.
Place the machine on an even surface before switching it on.
The machine must not be tilted before it is switched on or during switching-on.
Do not switch on the motor if the discharge chute is not covered by the discharge flap or the grass catcher box (accessory – not included in standard equipment).
Avoid switching the machine on repeatedly within a short period of time; in particular avoid “playing” with the ON button. Risk of motor overheating.
Owing to the voltage fluctuations caused by this machine during the run-up period, other devices connected to the same circuit may be subject to interference in the case of unfavourable power supply conditions. In this case, appropriate steps should be taken (e.g. connection to a different circuit than the one used by the affected device, or operation of the machine using a circuit with a lower impedance).

Working on slopes:

Always work across and back on slopes, never up and down.
If the user loses control when working up and down, there is a risk of being run over by the machine.
Be particularly careful when changing direction on a slope.
Always ensure good stability on slopes and avoid mowing on excessively steep slopes.
For safety reasons, the machine must not be used on slopes with an inclination of more than 25° (46.6%). Risk of injury!A slope inclination of 25° corresponds to a vertical height increase of 46.6 cm for a 100 cm horizontal distance.

Working:

Caution – risk of injury! Never put hands or feet on or underneath rotating parts. Never touch rotating blades.

Always keep away from the discharge opening. Always observe the safety distance provided by the handlebar.
Do not try to examine the scarifying unit while the machine is operating. Never open the discharge flap and/or remove the grass catcher box (accessory – not included in standard equipment) when the blades are running. Rotating blades can cause injury.
Do not lean on the machine and always maintain your balance and firm footing.
Only operate the machine at walking speed – never run when working with the machine. Working quickly with the machine increases the risk of injury due to stumbling, slipping, etc.
Note that the blades catch on the ground when scarifying in the lowered position or when running over bumps. If the blades are set too low, the scarifier could accelerate unexpectedly, possibly resulting in loss of control of the machine.
Always place the scarifying unit in the transport position before turning it around.
Be particularly careful when turning the machine around or pulling it towards you. Risk of stumbling!
Never lift or carry the machine with the motor running or the mains lead connected.
Objects hidden in the turf (lawn sprinkler systems, posts, water valves, foundations, electrical wires, etc.) must be avoided. Never run over any such foreign objects.
Use the machine with great care when working near slopes, terraces, ditches and embankments. In particular, ensure that you maintain sufficient distance to such danger areas.
Beware of the blades running on for several seconds before coming to a standstill.
Switch off the motor and place the scarifying unit in the transport position,
- before adjusting the working depth,
- before opening the discharge flap or removing the grass catcher box (special accessory – not included in standard equipment).
  Switch off the motor, disconnect the mains plug, place the scarifying unit in the transport position and ensure that the blades have come to a complete standstill,
- before pushing the machine onto an area not covered with grass,
- before lifting or carrying the machine,
- before transporting the machine.

Switch off the motor, disconnect the mains plug and ensure that the blades have come to a complete standstill,

before pushing the machine onto an area not covered with grass,
before lifting or carrying the machine,
before transporting the machine.

Switch off the motor, disconnect the mains plug and ensure that the blades have come to a complete standstill,

before leaving the machine unattended,
before freeing a blocked scarifying unit or unblocking the discharge chute, before you check, clean or carry out work on the machine (e.g. folding down the handlebar),
if there has been a collision with an obstacle. Inspect the machine for damage and perform the necessary repairs before re-starting and using the machine.
if the machine vibrates abnormally. In this case the machine must be checked immediately.

Risk of injury through defective parts!
Strong vibration is normally an indication of a fault.
In particular, the machine must not be operated with a damaged or bent scarifying unit (blade shaft, blades, spacer bushings and fastening).

In the event of abnormal vibration or after a collision with an obstacle, check the machine, in particular the scarifying unit (blade shaft, blades, spacer bushings and fastening), the housing and the discharge flap for damage and loose parts and carry out the necessary repairs before re-starting and working with the machine. If you do not have the appropriate expertise, have the necessary repairs carried out by a specialist dealer (STIHL recommends STIHL specialist dealers).

Maintenance, cleaning, repairs and storage

Before performing any work on the machine, before adjusting or cleaning the machine, or before checking whether the electric cable is entwined or damaged, switch off the machine and disconnect the mains plug from the socket.
Allow the machine to fully cool down before storing it in enclosed places, performing maintenance on it or cleaning it.

Cleaning:

The complete machine must be cleaned thoroughly following use. (11.2)
Remove accumulated clipping deposits using a stick. Clean the underside of the machine with water and a brush.
Never use high-pressure cleaners and do not clean the machine under running water (e.g. using a garden hose).
Do not use aggressive cleaning agents. These can damage plastics and metals, impairing the safe operation of your STIHL machine.
In order to prevent fire hazards, keep the area around the air vents between the motor hood and housing free from
e.g. grass, straw, moss, leaves or escaping grease.

Maintenance operations:

Only maintenance operations described in this instruction manual may be carried out. Have all other work performed by a specialist dealer.
If you do not have the necessary expertise or auxiliary equipment, please always contact a specialist dealer.
STIHL recommends that you have maintenance operations and repairs performed exclusively by a STIHL specialist dealer.
STIHL specialist dealers regularly attend training courses and are provided with technical information.
Only use tools, accessories or attachments approved for this machine by STIHL or technically identical parts. Otherwise, there may be a risk of accidents resulting in personal injury or damage to the machine. If you have any questions, please consult a specialist dealer.
The characteristics of original STIHL tools, accessories and spare parts are optimally adapted to the machine and the user’s requirements. Genuine STIHL spare parts can be recognised by the STIHL spare parts number, by the STIHL lettering and, if present, by the STIHL spare parts symbol. On smaller parts, only the symbol may be present.
Always keep warning and information stickers clean and readable. Damaged or missing stickers must be replaced by new, original plates from your STIHL specialist dealer. If a component is replaced with a new component, ensure that the new component is provided with the same stickers.
Only perform work on the scarifying unit when wearing thick work gloves and exercising extreme care.
When working on the scarifying unit, make sure that the blades cannot be moved, even when the mains plug is disconnected.
Ensure that all nuts, pins and screws are securely tightened, so that the machine is in a safe operating condition at all times.
Check the complete machine and the grass catcher box (accessory – not included in standard equipment) for wear or damage on a regular basis, particularly before extended periods when the machine is not in use (e.g. over winter). For safety reasons, worn or damaged parts must be replaced immediately to ensure that the machine is always in a safe operating condition.
Components or guards that are removed for maintenance operations must be properly reinstalled immediately.

Storage for prolonged periods without operation

Store the cooled machine in a dry and locked place.
Ensure that the machine is protected from unauthorized use (e.g. by children).
Thoroughly clean the machine before storage (e.g. winter break).
Store the machine in good operational condition.
Store the machine on a level surface so that it cannot unintentionally roll away.

Disposal
Ensure that old machines are properly disposed of. Render the machine unusable prior to disposal. In order to prevent accidents, ensure that you remove the power supply cable or the electric cable from the ON/OFF switch to the motor.
Risk of injury caused by the scarifying unit!
Always store an old machine in a safe place prior to scrapping. Make sure that the machine and the blades are kept out of the reach of children.

Description of symbols

Attention!
Read the instruction man-ual and follow the safety instructions before initial use.

Risk of injury!
Keep other people out of the danger area.

Caution, sharp blades!
Keep fingers and toes away from the blades. Disconnect the mains plug from the socket before performing any repair, adjustment or cleaning work or if the elec-tric cable is tangled or damaged. The blades con-tinue to rotate after the motor has been switched off.

Risk of electric shock!
Keep the electric cable away from the blades.
Do not work in the rain or in a wet environment.
Wear safety glasses
Switch on the motor

Scarifying unit in transport position

Scarifying unit in operating position

Standard equipment

STIHL RLE 540 Efficient Electric Lawn Scarifier fig
2

Preparing the machine for operation

Risk of injury!
Observe the safety instructions in the section “For your safety”. (4.)
Follow the instructions in the section “Transporting the machine” when lifting the scarifier out of the packaging. In particular, wear gloves and avoid contact with the blades. (4.4)

Place the machine on level and firm ground when performing all the operations described.
Remove the cardboard insert (1) from the underside of the machine.

Assembling the handlebar

Installing the upper handlebar: STIHL RLE 540 Efficient Electric Lawn
Scarifier fig 3

Fit upper handlebar (1) onto both parts of the lower handlebar.
Insert flat head bolts with cable guide (B) through the bores from the inside to the outside and tighten with rotary handles (C).
Attach cable (2) to right-hand cable guide (3) and cable (4) to left-hand cable guide (5) as shown.

Installing the cable clips:

Danger of electric shock!
In order to prevent damage to the insulating layer on the handlebar, only press on the cable clips by hand. Do not use any tools (e.g. hammer or screwdriver).

Install the first cable clip (D) on the upper handlebar. Distance between the cable clip and switch:
25 – 27 cm
Install the second cable clip (D) on the lower handlebar.
Insert electric cable (2) in both cable clips as shown. Close tab (6) and allow it to engage.

Folding down the handlebar

See Fig 3

Danger of pinching!
Releasing rotary handles (C) can cause the upper handlebar to fold down. For this reason, always hold upper handlebar (1) with one hand at its highest point when you loosen the rotary handles.

Transport position – for space-saving transport and storage:

Unscrew rotary handles (C) until they turn freely, then fold down upper handlebar (1) forwards and allow it to rest on the machine. Make sure that the electric cable is not damaged.

The machined grooves in the threads of the flat head bolts prevent the rotary handles from becoming completely detached from the bolts (safeguard against loss).

Working position – for pushing the machine:

Fold up upper handlebar (1) rearwards and hold with one hand.
Tighten rotary handles (C).

Scarifying unit
Lowering the scarifying unit into the operating position: STIHL RLE 540
Efficient Electric Lawn Scarifier fig 4

Risk of injury!
The scarifier moves forwards when the rotating scarifying unit is lowered.

Place scarifying unit lever (1) in the operating position in the direction of the arrow as shown. The scarifying unit is lowered to the set working depth. (7.4)

Raising the scarifying unit into the transport position:

Place scarifying unit lever (1) in the transport position and allow it to engage.

Adjusting the working depth
Six different working depths can be set.
Level 1:
Shallowest working depth
Level 6:
Deepest working depth
Adjustment range: 25 mm.

Place scarifying unit (1) in the transport position and allow it to engage. (7.3)
Set the required working depth via working depth rotary handle (2).

Notes:

Always begin the scarifying process at the shallowest working depth (level 1). If the scarifying result is insufficient, increase the working depth in steps.
Blade wear can be compensated by selecting a deeper working depth.
Levels 5 and 6 should not be selected with new blades as this can damage the grass roots during scarifying.

The working depth is dependent on blade wear and the ground. The scarifier is pressed against the surface of the lawn through the rotation of the blades and through its own weight: on softer ground, the scarifier cuts deeper into the ground than on a compact surface.

Notes on working with the machine

Risk of injury!
Untangle any knots in the cable immediately.
Guide the electric cable behind you when scarifying. Electric cables can be inadvertently cut when scarifying and present a tripping hazard. They therefore involve a high accident risk. For this reason, work so that the electric cable is always visible in the area of grass that has already been scarified.

Notes on scarifying
Regular scarifying renders the lawn less sensitive to dryness, heat and cold. Aerating the lawn annually makes it less prone to diseases, the ground is also firmed up and bare patches (caused by ball games or parties) are repaired. – A green lawn with even growth is created.

Time:
The best time for annual scarifying is the early spring.
If a lawn is scarified more often than once annually using a scarifier, this process should not be performed during midsummer or the middle of autumn.

After scarifying, the lawn needs to regenerate for a few weeks. Consequently, the ideal time for scarifying is the period of growth in the spring.
Heavily matted lawns should be scarified twice a year: first in the spring and again in the autumn.

Lawn preparation:
Before scarifying, mow the grass to a height of approx. 2 to 3 cm.
The shorter the lawn is cut, the better the scarifying results.
The lawn must not be freshly seeded, wet or excessively dry.

Tips for optimum working results:

The ground should only be scarified so as not to damage the grass roots. (7.4)
Guide the scarifier in straight parallel strips.
Maintain an even working speed.
Always place the scarifying unit in the transport position before turning it around. (7.3)
Avoid staying stationary in one place for any duration.
In the case of heavily matted lawns, repeat the process perpendicular to the initial strips.

After scarifying:

Free the lawn completely of scarified material.
Fertilise the lawn and re-seed any bare patches that may have appeared.
Water the lawn generously.

Working area for the operator

For safety reasons, the operator must stay within the working area behind the handlebar when the motor is running. Always observe the safety distance provided by the handlebar. The
scarifier must only be operated by one person. Other persons must keep out of the danger area. (4.)

Correct motor load

Only switch on the motor when the scarifying unit is in the transport position.
The scarifier load must never cause the motor speed to drop significantly.
If the speed drops, reduce the feed speed. If necessary, place the scarifying unit in the transport position and select a shallower cutting depth before continuing with scarifying.

Thermal motor overload protection
If an overload of the motor occurs during operation, the built-in thermal overload protection device automatically switches off the motor.
Causes for an overload:

Excessive rate of feed
Blades cut too deeply into the ground
Unsuitable or excessively long electric cable – voltage loss (10.1)
Inadequate cleaning of athe cooling air guide (inlet slots)

Recommencing operation
Resume normal operation of the machine following a cooling period of up to 10 min (depending on the ambient temperature).

If the scarifying unit becomes blocked
Switch off the motor immediately and disconnect the mains plug. Then inspect the machine, in particular the scarifying unit, for damage and eliminate the cause of the fault.

Safety devices

The machine is equipped with several safety devices for safe operation and for the prevention of improper use.

Risk of injury!
If a safety device is found to be defective, the machine must not be operated. Consult a specialist dealer; STIHL recommends STIHL specialist dealers.

Safety devices
The scarifier is equipped with safety devices which prevent inadvertent contact with the blades and with ejected scarified material.
These include the housing, discharge flap and correctly installed handlebar.

Two-hand operation
The motor can only be switched on by pressing and holding the ON button with the right hand and then pulling the motorstop lever to the handlebar with the left hand.

Operating the machine

Electrical connection

Danger of electric shock! Observe the safety instructions in the section “For your safety”

If using a cable drum, the connection cord must be unwound completely, otherwise, electrical resistance may cause loss of power and overheat.
Only cables which are no lighter than the following rubber-sheathed cables may be used as electric cables:
H07 RN-F DIN/VDE 0282

Minimum cross-section:
up to 25 m length: 3 x 1,5 mm²
up to 50 m length: 3 x 2,5 mm²

The connectors of the electric cables must be made of rubber or have a rubber cover and conform to the following standard: DIN/VDE 0620
The mains voltage and mains frequency must correspond to the information on the rating plate and the information contained in the section “Technical specifications”
The power cable must be adequately protected by a fuse (18.).
This machine is intended for operation with a power supply having a system impedance of Zmax at the transfer point (house connection) of maximum 0,49 ohms (at 50 Hz).
The user must ensure that the machine is only operated with a power supply which meets this requirement. If necessary, this information can be obtained from the local electric power company.

Strain relief
During working, the strain relief 8 prevents any unintentional disconnection of the electric cable and any resulting damage to the mains connection on the machine.
For this reason, the electric cable must be fed through the strain relief.

Form a loop in the power cable (1) and guide it through the opening (2).
Then push the loop over the hook (3) and pull it tight.

Switching on the scarifier

Risk of injury!
Only switch on the motor when the scarifying unit is in the transport position.
Never tip the scarifier to switch on the motor.

Press and hold down ON button (1).
Pull motorstop lever (2) to the handlebar and hold.
- The ON button (1) can be released once motorstop lever (2) is pulled.
- Lower the scarifying unit into the operating position and scarify the lawn. (7.3)

Switching off the scarifier

Place the scarifying unit in the transport position. (7.3)
Release motorstop lever (1). The motor and scarifying blades come to a stop after a short run-down time.

Maintenance

General

Risk of injury!
Observe the safety instructions in the section “For your safety” (4.).

Annual service by the specialist dealer:
The scarifier should be inspected once annually by a specialist dealer. STIHL recommends STIHL specialist dealers.

Cleaning the machine
Maintenance interval: After each use STIHL RLE 540 Efficient Electric Lawn
Scarifier fig 11

Care of the machine will protect it against damage and extend its service life.

Place the scarifier on firm, level and flat ground.
Cleaning position:
Detach the grass catcher box (accessory – not included in standard equipment), fold down upper handlebar (1) (7.2) and raise discharge flap (2). Tilt scarifier (3) upwards at the front by raising it at carrying handle (4). Set down the scarifier as shown and allow the upper handlebar to rest on the ground.
Only clean the machine using water, with a brush or with a cloth. Remove accumulated clipping deposits using a stick. If necessary, use a special cleaner (e.g. STIHL special cleaner).
Never aim hose water or high-pressure cleaners at electric components like switches, parts of the motor, V-belts, seals or bearing points.
Clean the scarifying unit.
Remove dirt from the cooling air guide (inlet slots) between the motor hood and the housing to ensure that the motor is adequately cooled.

Electric motor and wheels
The electric motor is maintenance-free.
The wheel bearings are maintenance-free.

Upper handlebar
Maintenance interval: Before each use

Check the upper handlebar for damage
- it is coated with an insulating layer. Should this layer become damaged, do not operate the scarifier and have the upper handlebar replaced by a specialist dealer. STIHL recommends STIHL specialist dealers.

Scarifying unit

Risk of injury!
Worn blades may break off and cause serious injuries. It is therefore essential that maintenance is always performed as described.

Maintenance interval: Before each use

Tilt the scarifier upwards into the cleaning position. (11.2)
Check the scarifying unit (consisting of blade shaft, blades, nuts, washers and spacer bushings) for wear, secure seating, cracks or other damage.

Wear check:
The blades must be replaced when the ground is not scored, even at the deepest working depth (level 6). Blades must always be replaced as a complete set. Never re-sharpen blades.
Have defective or worn parts repaired or replaced by a specialist dealer. STIHL recommends STIHL specialist dealers.

Storage and winter break

Store the scarifier in a dry and locked place that is generally free of dust. Make sure that the machine is kept out of the reach of children.
Only store the scarifier in good operating condition, fold down the handlebar if necessary.
Keep all nuts, pins and screws tightly fastened, replace danger signs and warnings on the machine that have become illegible, check the entire machine and grass catcher box
(accessory – not included in standard equipment) for wear and damage. Replace all worn or damaged parts.
Any machine faults must be completely remedied prior to storage.
Also note the following points when storing the scarifier for long periods (winter break):
Clean all external parts of the machine with care.
Thoroughly lubricate/grease all moving parts.

Transport

Risk of injury!
Observe the section “For your safety” before transporting. (4.) When transporting, always wear suitable safety clothing (safety shoes, thick gloves).
Always disconnect the power cable before lifting or transporting.

Carrying the machine:

The scarifier must always be carried by two people. Always ensure sufficient distance between the blades and your body, particularly your feet and legs. Lift or carry the machine at carrying handle (1) and at upper handlebar (2) or, when the upper handlebar is folded down, at the lower handlebar sections (3).

Securing the machine (lashing):

Secure the scarifier and grass catcher box (accessory – not included in standard equipment) on the load floor using suitable fastening materials. Only transport the machine upright on its wheels.
Fasten ropes or straps to lower handlebar sections (3), to front axle (4) and to the housing strut under discharge flap (5).

Minimizing wear and preventing damage

Important information on maintenance and care of the product group
Scarifier, manually operated and mains-powered (STIHL RLE)
STIHL assumes no liability for material or personal damage caused by the non- observance of information contained in the operating instructions, in particular with regard to safety, operation and maintenance, or which arise through the use of unauthorised attachment or spare parts.
Please always observe the following important information for the prevention of damage or excessive wear to your STIHL machine:

Wearing parts
Some parts of the STIHL machine are subject to normal wear even when used properly and must be replaced in due time depending on type and duration of use.
These include:
Blades
V-belt
Grass catcher box (accessory – not included in standard equipment)
Compliance with the information in this instruction manual
The STIHL machine must be used, maintained and stored with the care described in this instruction manual. Any damage caused by non-compliance with the safety, operating and maintenance instructions is the sole responsibility of the user.
This applies in particular to:
inadequately dimensioned power cables (cross section),
Incorrect electrical connection (voltage),
Product modifications not approved by STIHL.
The use of tools or accessories which are not approved or suitable for the machine, or are of inferior quality.
Improper use of the product.
Use of the product for sporting or competitive events.
Resultant damage due to continued use of the product with defective components.
Maintenance operations
All operations listed in the section
“Maintenance” must be performed regularly.
If these maintenance operations cannot be carried out by the user, a specialist dealer must be commissioned to perform them.
STIHL recommends that you have maintenance operations and repairs performed exclusively by a STIHL specialist dealer.
STIHL specialist dealers regularly attend training courses and are provided with technical information.
If these operations are neglected, faults may arise which are the responsibility of the user.
These include:
damage to the motor as a result of inadequate cleaning of the cooling air guide (inlet slots),
corrosion and other resultant damage caused by incorrect storage,
damage to the machine through the use of inferior-quality spare parts,
damage due to untimely or inadequate maintenance or damage due to maintenance or repair work not performed in the workshops of specialist dealers.

Environmental protection

Scarified material should be composted and not disposed of in household waste.
The machine, its packaging and accessories are all produced from recyclable materials and must be disposed of accordingly.
By disposing of materials separately and in an environmentally friendly manner, recyclable waste can be re-used. For this reason, the machine should be disposed of for recycling at the end of its useful life. Improper disposal may be harmful to health and pollute the environment. Pay particular attention to the information in the section “Disposal” during disposal. (4.9)

Consult your recycling c– design: electric lawn scarifier
– manufacturer’s brand: STIHL
– type: RLE 540.0
– serial number: 6290entre or your specialist dealer for information on the proper disposal of waste products.

Standard spare parts

Blade set:
6290 007 1000

Accessories

Grass catcher box AFK 050:
6910 700 9600

EU – Declaration of conformity

STIHL RLE 540.0 Scarifier
STIHL Tirol GmbH
Hans Peter Stihl-Strasse 5 6336 Langkampfen Austria
declares under our sole responsibility that

design: electric lawn scarifier
manufacturer’s brand: STIHL
type: RLE 540.0
serial number: 6290

complies with the relevant provisions of Directives 2000/14/EC, 2006/42/EC, 2014/30/EU, 2011/65/EU and
2009/125/EC and has been developed and manufactured in accordance with the versions of the following standards valid on the date of manufacture: EN 50636-2-92, EN 60335-1, EN 55014-1, EN 55014-2, EN 61000-3-2 and EN 61000-3-3
(where applicable).

Name and address of the notified body involved:
TÜV Rheinland LGA Products GmbH Tillystrasse 2
D-90431 Nuremberg
The measured and guaranteed sound power levels were determined in accordance with Directive 2000/14/EC, Appendix V.

Measured sound power level: 86 dB(A)
Guaranteed sound power level: 89 dB(A)

Technical specifications

Type & RLE 540.0

Serial number 6290
Motor, design Electric motor
Voltage 230 V~
Power input 1600 W
(EU) 2019/1781 §2(2) (j)
Frequency 50 Hz
Fuse 10 A
Protection class II
Type of protection IPX 4
Scarifying device 14 fixed vertical
blades
Scarifying blade drive Permanent
Motor output speed 2840 rpm
Working width 38 cm
Working depth 6 levels, adjustment range 25 mm
Wheel diameter (front) 180 mm
Wheel diameter (rear) 180 mm
Length 126 cm
Width 54 cm
Height 111 cm
Weight 28 kg

Sound emissions:
In accordance with Directive 2000/14/EC:
Guaranteed sound
power level LWAd 89 dB(A)

REACH
REACH is an EC Directive for the registration, evaluation, authorisation and restriction of chemicals.
Information on compliance with the REACH Directive (EC) No. 1907/2006 is available from www.stihl.com/reach.

Troubleshooting

If necessary, contact a specialist dealer; STIHL recommends STIHL specialist dealers.

Fault:
Motor not starting

Possible cause:

No mains voltage
Scarifying unit not in transport position
ON button not pressed
Blade shaft blocked
Electric cable/plug and plug connector or switch defective
Thermal motor overload protection activated

Remedy:

Check fuse (10.1)
Place scarifying unit in transport position (7.3)
Press ON button (10.3)
Place scarifying unit in transport position and clean housing and discharge chute (disconnect mains plug!)
Check cable/plug/switch and replace if necessary
Allow machine to cool down

Fault:
Frequently tripped mains fuse

Possible cause:

Unsuitable electric cable
Power overload
Machine overloaded due to working with blades set too deep

Remedy:

Use suitable electric cable (10.1)
Connect machine to another circuit
Reduce working depth and feed speed (7.4)

Fault:
Excessive vibration during operation

Possible cause:

Scarifying unit defective
Engine mounting loose

Remedy :

Check blades, blade shaft, spacer bushings, fastening and bearings of scarifying unit and repair if necessary (11.5),
Screw down motor

Fault:
Poor working results

Possible cause:

Blades set too deep (bare patches, high grass content in scarified material)
Blade set too shallow (little or no lawn thatch is removed)
Blades have reached wear limit
V-belt defective, worn or insufficiently tensioned

Remedy:

Reduce working depth
Increase working depth
Replace blades
Replace V-belt

Fault:
Blades not turning freely

Possible cause:

V-belt defective
Scarifying unit defective

Remedy:

Replace V-belt
Repair scarifying unit

Fault:
Scarifying unit cannot be raised or lowered

Possible cause:
Cable defective or detached

Remedy:
Replace or repair cable

Fault:
Working depth cannot be set

Possible cause:

Scarifying unit in operating position
Rotary handle or adjustment element defective

Remedy:

Place scarifying unit in transport position
Repair rotary handle or adjustment element

Service Schedule

Handover confirmation

Service confirmation
Please hand this instruction manual to your STIHL specialist dealer in the case of maintenance operations. He will confirm the service operations performed in the pre-printed boxes.