Royal RT 551 - Brush cutter EINHELL - Free user manual and instructions

Product type	Electric grass trimmer
Brand	Einhell
Model	Royal RT 551
Supply voltage	230 V ~ 50 Hz
Power	500 Watts
Cutting diameter	32 cm
No-load speed	11,000 rpm
Nylon line	Diameter 1.2 mm
Sound pressure level (LPA)	84 dB(A)
Sound power level (LWA)	96 dB(A)
Handle vibration	3.8 m/s²
Weight	2.9 kg
Line feed system	Semi-automatic by button
Functions	Grass cutting, edge cutting (handlebar rotation)
Safety protection	Protective cover, start lock, inertia stop
Adjustments	Handlebar height, tilt angle (by pedal), additional handle
Recommended cutting angle	Approximately 30° tilt
Maintenance	Cleaning with brush and damp cloth, no water
Warranty	2 years
Included accessories	Protective cover, screws, additional handle
Power supply	Mains (integrated electric cable)

Frequently Asked Questions - Royal RT 551 EINHELL

How to assemble the Royal RT 551 grass trimmer?

To assemble the device, attach the protective cover to the motor head (figure 3) and secure it with the provided screws. Then, fasten the additional screws in connection with the parallel guide (figure 5). Install the handle as shown in figures 6 and 7. Make sure all screws are tightened before use.

How to adjust the height and angle of the grass trimmer?

To adjust the height, turn the height adjustment (figure 8 ref. 1) to the right, adjust the desired height, then screw back to the left. To adjust the additional handle, place the device flat, loosen the screw (figure 7 pos. 1), adjust the handle and retighten. For the tilt angle, press the side pedal on the motor housing (figure 17), tilt the handlebar, then release the pedal to lock.

How to start and stop the grass trimmer?

To start, first press the start lock (figure 1 ref. 4) then the On/Off switch (figure 1 ref. 3). To stop, release the On/Off switch. Never carry the device while running. Wait for the cutting line to stop completely before any intervention.

What to do if the device does not start?

First check that the power cable is properly connected and the fuses are not damaged. If voltage is present but the device does not work, contact after-sales service at the address indicated in the manual. Do not attempt to repair the device yourself.

How to change the line spool?

Before any intervention, disconnect the plug from the power outlet. Press laterally on the spool cover at the marks (figures 14/15) and remove the cover with the spool. Be careful not to lose the spring. Remove the empty spool, pass the ends of the new line through the eyelets of the cover, then put the assembly back in the housing. The line will be cut automatically on first start-up.

How to use the grass trimmer in edge cutting mode?

Disconnect the device. Rotate the handlebar at the height adjustment 180° to the right until it locks (figure 13). You obtain a vertical cut for lawn edges. Always keep the device in a stable position.

What are the essential safety precautions?

Always wear safety glasses, a helmet, gloves and sturdy shoes. Keep a distance of at least 5 m from people and animals. Do not work in rainy weather or on wet grass. Before each use, inspect the device and remove foreign objects from the work area. Do not touch the rotating line.

How to maintain the Royal RT 551 grass trimmer?

After each use, disconnect the device and clean the protective cover with a brush. Use a damp cloth and mild detergent for the body and plastic parts. Never wash with water and do not use aggressive solvents. Regularly check the tightness of the screws and the condition of the power cable.

What type of line to use for the grass trimmer?

Use exclusively original nylon line of diameter 1.2 mm. Never use metal line, as this could damage the device and cause injury. The line is automatically extended thanks to the semi-automatic system.

How to avoid excessive wear of the cutting line?

To avoid premature wear, avoid touching hard objects such as stones, walls or edges. Use the edge guide and protective cover to maintain distance. Cut the grass in stages if it is long, and tilt the device to 30°. Do not cut wet grass.

USER MANUAL Royal RT 551 EINHELL

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RT 551

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Technical diagram of a hairless spray gun with numbered parts and safety warning symbols

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Close-up of a black handheld device with a curved base and handle, showing directional arrows (no text or symbols visible)

Close-up of a mechanical component with concentric rings and mounting holes (no visible text or symbols)

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Close-up of a mechanical tool with two labeled parts (① and ②), showing a handle and lever mechanism (no text or symbols beyond labels)

Close-up of a black wrist strap with a curved handle and a numbered annotation (①), no visible text or symbols.

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Close-up of a black and gray handheld device with curved leads (no visible text or symbols)

Illustration of a person in workwear and helmet using a walking stick, with a 30-degree angle marker (no text or symbols)

Line drawing of a person using a tool to clean or spray, no text or symbols present

Technical line drawing showing two views of a mechanical component with intersecting lines, no text or symbols present

Close-up of a black handheld device with a handle and lever mechanism (no visible text or symbols)

Close-up of a hand holding a black mechanical component with a circular knob (no visible text or symbols)

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Close-up of a hand using a spring-loaded tool to adjust or install a black mechanical component (no visible text or symbols)

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1. Items supplied (see Figure 1)

1. Power cable
2. Upper handle
3. On/Off
4. Safety lock-off
5. Button to dismantle the appliance
6. Height adjuster
7. Guard hood
8. Edge guide
9. Tilt adjustment pedal

2. Important notes

Please read the directions for use carefully and observe the information provided. It is important to consult these instructions in order to acquaint yourself with the grass trimmer, its proper use and safety precautions.

Important!

For safety reasons the grass trimmer is not to be used by children, young people under 16 years of age, or any other persons who are not acquainted with these directions for use. Keep the instruction manual in a safe place for later use.

● Examine the grass trimmer each time before you use it. Do not use the trimmer if any safety devices are damaged or worn. Never put safety devices out of operation.
- Use the grass trimmer only for the purpose specified in these instructions.
● You are responsible for safety in your work area.
- Inspect the items you want to cut before starting to work. Remove any foreign objects you find. Watch out for foreign objects while you work. If you still hit upon an obstacle while cutting, turn off the grass trimmer and remove the obstacle.
● Work only in good visibility
● Always make sure of your footing while working Be careful when stepping backwards. Risk of stumbling!
● Never leave the grass trimmer unattended at your work place. Store the trimmer in a safe place during interruptions.
- If you interrupt your work to move to a different position it is imperative to switch off the grass trimmer while you are moving there.

● Never use the grass trimmer in the rain or in moist or wet conditions.
- Protect the grass trimmer from the damp and rain.
● Before you switch on the grass trimmer, make sure that there are no stones or other objects touching the nylon line.
● Always wear suitable clothing to protect your head, hands and feet from injury. Wear a helmet, goggles or visor, high boots or strong shoes, long trousers made of tough material, and work gloves.
● Be sure to hold the grass trimmer away from your body when it is switched on!
- If the grass trimmer is turned over or if it is not in working position, do not switch it on.
- Switch off the motor and pull out the power plug when you are not using the grass trimmer, when you leave the trimmer unattended, when you are checking the trimmer, if the power cable is damaged, when you want to remove and replace the spool, and when you are moving the trimmer to another location.
- Keep the grass trimmer away from other persons, particularly children and pets. There may be stones and other objects in the flying cut grass.
- Keep at least 5 m away from other persons and animals when you are working with the grass trimmer.
● To prevent injury to yourself and damage to the grass trimmer, never cut against hard objects
- Use the edge of the guard to keep the grass trimmer away from walls, changes of surface and fragile objects.
● Never use the grass trimmer without a guard.

CAUTION! The guard is vital for your safety and for the safety of others, and it is also essential for the grass trimmer to work correctly. Failure to observe this instruction will not only create a potential hazard, it will also result in the loss of your rights under the warranty.

● Never try to stop the cutter (nylon line) with your hands. Wait until it stops by itself.
● It is imperative to use only the original nylon line. Never use metal wire instead of the nylon line.
● Beware of injuring yourself on the line cutting device.
- Keep the air vents clear of dirt.
● After use, unplug the machine and check it for damage.
● Never attempt to cut grass that is not growing on

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the ground. For example, do not try to cut grass growing on walls, rocks, etc.

● Within the working radius of the grass trimmer the user is responsible for any damage caused to third persons by use of the trimmer.
● Never cross roads or pebble paths with the grass trimmer switched on.
- When you are not using the grass trimmer, keep it in a dry place out of the reach of children.
- Use the grass trimmer only as described in these directions for use and always hold it vertical to the ground. All other positions are dangerous.
- Check the screws regularly to see that they are properly tightened.
● The mains voltage must be the same as the voltage specified on the rating plate.
- Check the power cable regularly for signs of damage or aging. Never use the grass trimmer if the power cable is in less than perfect condition.
● Power cables used with the trimmer must not be of a lighter duty class than HO7RN-F rubber-insulated flexible cables according to DIN 57282 / VDE 0282 with a minimum diameter of 1.5 mm ^2 . Plug connectors must be equipped with earthing contacts and the coupling must be rain-water-protected.
- Keep cables and other objects out of the area you want to cut.
- If you have to lift the grass trimmer to move it, switch off the motor and wait for the rotating tool to stop. Before you leave the trimmer, switch off the motor and pull out the power plug.
● Before you connect the grass trimmer to the power supply, make sure that none of its moving parts are damaged and that the line spool is correctly inserted and fastened.
● Never cut against hard objects when using the grass trimmer. This is imperative to avoid causing injury to the user and damage to the trimmer.
● Use only original replacement parts for repair and maintenance purposes.
● Have repairs carried out only by a qualified electrician.
● Examine the grass trimmer for signs of wear or damage each time before you use it and after any collisions. Have essential repairs carried out without delay.
● Always keep your hands and feet away from the cutting mechanism, particularly when you switch on the trimmer.
● After pulling out new line, always return the trimmer to normal working position before you switch it on again.
● Never use replacement parts or accessories which are not foreseen or recommended by the

manufacturer.

● Pull out the power plug before carrying out any inspection, cleaning or other work on the trimmer and whenever it is not being used.

Caution! The nylon line will run on for a few seconds after the tool is switched off!

3. Symbols used on the appliance (see Figure 2)

Item 1: Warning

Item 2: Wear eye protection

Item 3: Protect from moisture

Item 4: Read the instruction manual before starting

Item 5: Pull out the mains plug before checking a

damaged power cable

Item 6: Keep other people out of the danger area

Item 7: The tool continues to rotate

4. Technical data

● Voltage 230V \~ 50 Hz

● Power rating 500 W
● Cutting width ø 32 cm
● Speed 11 000 rpm
● Nylon cutting line ∅ 1.2 mm
● Sound pressure level LPA 84 dB(A)
● Sound power level 96 dB(A)
● Vibration aw 3.8 m/s
● Weight 2.9 kg

The noise level of this machine may exceed 85 dB(A). In this case, noise protection measures need to be introduced for the user. The machine's noise was measured in accordance with IEC 59 CO 11, IEC 704, DIN 45635 Part 21, NFS 31-031 (84/538/EEC).

The value of the vibrations emitted on the hand is 3.8 m/s ^2 . This value was determined in compliance with EN 786 Appendix D: 1996+A1: 2001.

5. Assembling the grass trimmer

● Plug the guard hood on the motor head and fasten with the supplied screws (see Figure 3).
- First fasten the screws shown in Figure 4, then you can fasten the two screws in conjunction with the edge guide (see Figure 5).
● Fit the handle as shown in Figure 6.

6. Proper use

The trimmer is designed for cutting lawns and small areas of grass in private and hobby gardens. Tools for private and hobby gardens are not suitable for use in public facilities, parks and sport centers, along roadways, on farms or in the forestry sector. For the tool to be used properly it is imperative to follow the instructions set out in the manufacturer's directions for use. Important! It is prohibited to use the tool to chop material for composting because of the potential danger to persons and property.

7. Before starting

You can adjust the height of the grass trimmer and the position of the auxiliary handle to obtain the optimal working position.

Height adjustment:

Turn the height adjuster (Figure 8 Item 1) clockwise (see arrow) and set the required height. Turn the height adjuster anti-clockwise again to secure it.

Adjusting the position of the auxiliary handle:

Rest the grass trimmer firmly on the ground. Slacken the screw (Figure 7 / Item 1) and move the auxiliary handle to the optimal position. Tighten the screw to fix the handle in place.

Adjusting the tilt of the handle

Rest the grass trimmer firmly on the ground. Press with you foot on the pedal on the side of the motor housing (Figure 17). You can now adjust the handle to the required angle of tilt (Figure 17). To fix the handle at this angle, let go of the pedal and allow to handle to latch home.

8. To start

The grass trimmer is designed only to cut grass. The grass trimmer has a semi-automatic line extension system. Each time you activate the semi-automatic line extension system, the line will be extended to ensure that you can cut your lawn with the perfect cutting width at all times.

Please note that the wear on the line will be increased if you activate the semi-automatic line extension system frequently.

Note

If the line is too long when you use the machine for the first time, the surplus end of it will be cut by the blade on the safety hood.

If the line is too short when you start the machine for the first time, press the knob on the line spool and pull the line hard. When you then start the machine for the first time the line will be cut to the perfect length automatically.

Your grass trimmer will work at its best if you observe the following instructions:

● Never use the grass trimmer without its safety devices.
- Do not cut grass when it is wet. The best results are had on dry grass.
- Connect the power cable to an extension cable and hook the extension cable on the handle (Figure 9).

● To switch on your grass trimmer press the safety lock-off (Figure 1 Item 4) and then press the ON/OFF switch (Figure 1 Item 3).

● To deactivate the grass trimmer, let go of the On/Off switch (Figure 1 / Item 3).

- Do not move the grass trimmer against the grass until the switch is pressed, i.e. wait until the trimmer is running.

- For the correct cutting action, swing the grass trimmer to the side as you walk forward, holding it at an angle of approx. 30^ as you do so (see Figure 10 and Figure 11).

● Make several passes to cut long grass shorter step by step from the top (see Figure 12).

● Make full use of the edge guide and the guide hood in order to avoid unnecessary line wear.

- Keep the grass trimmer away from hard objects in order to avoid unnecessary line wear.

9. Using the grass trimmer as an edge cutter

The grass trimmer can be adapted in the following way to cut the edges of lawns and flower beds:

• Disconnect the grass trimmer from the power supply!
• Turn the bar on the height adjuster (Figure 8 Item 1) through 180^ clockwise (/see arrow) until it reaches the stop.

● The grass trimmer has now been converted into

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an edge cutter suitable for vertical cutting (Figure 12).

10. Replacing the line spool

Be sure to disconnect the power plug from the power supply by you replace the line spool!

• Press the sides of the spool cover as shown and remove it with the spool (Figure 13 und Figure 14). Ensure that you do not lose the spring.
• Remove the empty line spool.
  ● Thread the ends of the line on the new line spool through the eyelets in the spool cover.
  ● Fit the spool cover and spool back into the spool mounting.
• When you start the machine again the line will be cut to the perfect length automatically.

Caution! Catapulted pieces of nylon line may cause injury!

11. Cleaning and maintenance

• Switch off and unplug the grass trimmer before putting it away or cleaning it.
• Remove deposits from the guard hood with a brush.
  ● Clean the plastic body and plastic parts with a mild household detergent and a damp cloth.
  ● Never use aggressive agents or solvents for cleaning purposes!
  ● Never spray down the grass trimmer with water. Prevent water getting into the trimmer at all cost.

12. Troubleshooting

- The machine will not work: Check that the power cable is connected properly and check the mains fuses. If the machine will not work despite the voltage supply being OK, send it to the specified after-sales service address.

13. Waste disposal

- Important

● The grass trimmer and its accessories are made of various types of material, such as metal and plastic. Defective components must be disposed of as special waste. Ask your dealer or your local council.

14. Ordering replacement parts

Please quote the following details when ordering replacement parts:

● Type of machine
● Article number of the machine
- Serial number of the machine
● Replacement part number of the part you require (Refer to the replacement parts list)

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97/23/EG

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89/336/EWG

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90/396/EWG

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89/686/EWG

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87/404/EWG

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R&TTED 1999/5/EG

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2000/14/EG: LWM95.1 dB(A); LWA96 dB(A)

EN 60335-1; IEC 60335-2-91; EN 786; EN 55014-1; EN 55014-2; EN 61000-3-2; EN 61000-3-3;

The guarantee period begins on the sales date and is valid for 2 years. Responsibility is assumed for faulty construction or material or functional defects. Any necessary replacement parts an necessary repair work are free of charge. We do not assume responsibility for consequential damage. Your customer service partner

NL GARANTIE

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