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MB 4 RTP - Lawn mower VIKING - Free user manual and instructions
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USER MANUAL MB 4 RTP VIKING
MB 4.0 RT, MB 4.0 RTP
MB 4.0 R, MB 4.0 RT, MB 4.0 RTP
DEFRNLITESPTNOSVFIDAPLHUHRLV EN 0478 111 9924 C - EN Dear Customer, Thank you for choosing a VIKING quality product. This product has been produced using state-of-the-art production methods and extensive quality assurance procedures, because our goal is only achieved if you, the customer, are satisfied with your machine. If you have any questions concerning your machine, please contact your dealer or our sales agency directly. I hope that your VIKING machine will give you great enjoyment. Management Svanen The MB 4.0 R,
MB 4.0 RT, MB 4.0 RTP
models comply with the Nordic Ecolabel. Printed on chlorine-free bleached paper. Paper is recyclable. Cover is halogen free.
1. Table of contents
Notes on the instruction manual 30 General 30 Instructions for reading the instruction manual 30 Machine overview 30 For your safety 30 General 30 Refilling the tank – handling petrol 31 Clothing and equipment 32 Transporting the machine 32 Before operation 32 Working with your machine 33 Maintenance and repairs 34 Storage for prolonged periods without operation 35 Disposal 36 Description of symbols 36 Standard equipment 36 Preparing the machine for operation 37 General 37 Assembling the handlebar (MB 4 R, MB 4 RT) 37 Assembling the handlebar (MB 4 RTP) 37 Installing the cable clip 37 Attaching the cable (MB 4 RT, MB 4 RTP) 37 Fuel and engine oil 37 Controls 38 General 38 Height adjustment of the handlebar 38 Folding down the handlebar 38 Attaching and detaching the recoil starter rope 38 Cutting height adjustment 38 Safety devices 39 Motorstop lever 39 Notes on working with the machine 39 General information on mulching 39 When is mulching permissible? 39 How should mulching be performed? 39 How often should mulching be performed? 39 Operating the machine 39 Starting the engine 39 Stopping the engine 40 Self-propulsion (MB 4 RT, MB 4 RTP) 40 Maintenance 40 Cleaning the machine 40 Checking blade wear 40 Sharpening the mowing blade 41 Removing and installing mowing blade 41 Engine 41 Storage (winter break) 41 Transport 42 Transporting 42 Environmental protection 42 Minimising wear and preventing damage 42 Standard spare parts 43 CE - manufacturer's declaration of conformity 43 Technical specifications 44 Troubleshooting 44 Service schedule 45 Handover confirmation 45 Service confirmation 460478 111 9924 C - EN
This instruction manual constitutes original manufacturer’s instructions in the sense of EC Directive 2006/42/EC. VIKING 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.
2.2 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 (working position). Section reference: References to relevant sections and subsections for further descriptions are made using arrows. The following example shows a reference to a section: (Ö 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 screw (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: 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.
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.
2. Notes on 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.
1 Motorstop lever 2 Self-propulsion lever (MB 4 RT/RTP) 3 Handlebar 4 Cable guide 5 Handlebar screw fastening (MB 4 RTP) Quick-clamping device (MB 4 R/RT) 6 Cutting height adjustment 7 Housing 8 Impact protectors 9 Combustion engine 10 Spark plug socket 11 Carrying handle, front 12 Carrying handle, rear 13 Wheel scraper
DEFRNLITESPTNOSVFIDAPLHUHRLV EN 0478 111 9924 C - EN Observe the operating and maintenance instructions contained in the separate engine instruction manual. 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. 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. Never allow children under the age of 16 to use the machine. Local regulations may specify a minimum age for users. This machine is not suitable for use by persons (in particular children) with impaired physical, sensory or mental faculties or those lacking the appropriate experience and/or knowledge, unless supervised by a person responsible for their safety or having received instructions on use of the machine from such person. Children must be supervised, in order to ensure that they do not play with the machine. The MB 4 R and MB 4 RT models are intended for private use. The MB 4 RTP model is intended for professional use. Caution – risk of accident: The lawn mower is only intended for mowing lawns. Its use for other purposes is not permitted and may be dangerous or result in damage to the machine. Due to the physical danger to the user, the lawn mower must not be used for the following applications (incomplete list): – for trimming bushes, hedges and shrubs, – for cutting creepers, – for the care of lawn roofs and balcony boxes, – for shredding or chopping tree or hedge cuttings, – for clearing paths (vacuuming, blowing), – for levelling earth mounds, e.g. mole hills. For safety reasons, any modification to the machine, except the proper installation of accessories approved by VIKING, is forbidden and results in voiding of the warranty cover. Information regarding approved accessories can be obtained from your VIKING 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. 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.
4.2 Refilling the tank – handling petrol
Danger to life! Petrol is poisonous and extremely inflammable.0478 111 9924 C - EN
Petrol must only be stored in appropriate, tested containers (canisters). Always screw on the fuel tank and canister caps properly and tightly. Defective caps must be replaced for safety reasons. Never use beverage bottles or similar for disposal or storage of fuels and lubricants. Persons, particularly children, could be tempted to drink out of them. Keep petrol away from sparks, naked flames, pilot lights, heat sources, and other ignition sources. Do not smoke! Refill the tank out-of-doors and do not smoke during refilling. Before refilling the tank, stop the engine and allow it to cool. Refilling with petrol must be performed before the engine is started. When the engine is running or is hot, the tank cap must not be removed and the tank must not be refilled with petrol. Do not fill fuel tank completely, but fill to approx. 4 cm below the edge of the filler neck so that the fuel has room to expand. If petrol is spilled, the engine must only be started after the petrol-contaminated area has been cleaned. All attempts at starting must be avoided until the petrol fumes have dispersed (wipe dry). Any spilt fuel must be wiped up immediately. Clothing must be changed if it comes into contact with petrol. Never store the machine with petrol in the tank inside a building. The resulting petrol fumes could come into contact with naked flames or sparks and could be ignited. If it is necessary to drain the tank, this must be done out of doors.
4.3 Clothing and equipment
Always wear sturdy footwear with high-grip soles when working. Never work barefoot or, for example, in sandals. Also always wear sturdy gloves and tie up and secure long hair (headscarf, cap, etc.) when performing maintenance and cleaning work or when transporting the machine. Wear suitable safety glasses when sharpening the mowing blade. Always wear hearing protection when working with 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.
4.4 Transporting the machine
Always wear gloves in order to prevent injuries due to sharp-edged and hot components. Do not transport the machine with the engine running. Switch off the engine, let the blades come to a standstill and remove the spark plug socket prior to transport. Only transport the machine once the engine has cooled down and with an empty fuel tank. Use suitable loading aids (loading ramps, lifters). Secure the machine on the load floor using adequately dimensioned fastening materials (straps, ropes, etc.). Avoid contact with the mowing blade when lifting and carrying the machine. Observe the information in the section "Transport". It describes how to lift and lash the machine. (Ö 13.) When transporting the machine, always observe regional legislation, especially regarding load security and the transport of objects on load floors.
4.5 Before operation
Make sure that only persons who are familiar with the instruction manual are permitted to use the machine. Check the fuel system (particularly visible parts such as e.g. tank, tank cap, hose connections) before operating the machine. In the event of any leaks or damage, do not start the engine – fire hazard! Have the machine repaired by a specialist dealer prior to operation. Observe the local regulations regarding permitted operating times for gardening power tools with combustion engines or electric motors. 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.33 DEFRNLITESPTNOSVFIDAPLHUHRLV EN 0478 111 9924 C - EN Defective mufflers and all other worn or damaged parts must be removed before use of the machine. Replace any illegible or damaged danger signs and warnings on the machine. Your VIKING specialist has a supply of replacement stickers and all the other spare parts. Check secure seating of the spark plug socket on the spark plug before using the machine. The machine must only be used in good operating condition. Before each use, check whether: – The machine is properly assembled. – The cutting tool and the entire cutting unit (mowing blade, fastening elements, mowing deck housing) are in good condition. In particular check for secure fastening, damage (notches or cracks) and wear. (Ö 12.2) – The tank cap is properly attached. – The tank and fuel-carrying parts as well as the tank cap are in good condition. – The safety devices (e.g. motorstop lever, housing, handlebar, protective grille) are in good condition and working properly. – The oil cap is properly attached. Carry out any necessary work or consult a specialist dealer. VIKING recommends VIKING specialist dealers.
4.6 Working with your machine
Never work when animals or persons, 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). Caution – risk of injury! Never put hands or feet on or underneath rotating parts. Never touch the rotating blade. Always observe the safety distance provided by the handlebar. 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). 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. Exhaust gases: The machine generates poisonous exhaust gases when the engine is running. The gases contain poisonous carbon monoxide, a colourless and odourless gas, as well as other pollutants. The engine must never be operated in closed or poorly ventilated spaces. Starting: Exercise care when starting and observe the instructions contained in the section entitled "Initial operation of machine". (Ö 11.) Keep your feet a safe distance from the cutting tool. The machine must not be tilted during start-up. The self-propulsion lever must not be pressed when starting the engine. Working on slopes: Always work across and back on slopes, never up and down. If the user loses control when mowing 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! Danger to life through poisoning! In the case of nausea, headache, impaired vision (e.g. decreasing field of view) hearing disorder, dizziness, decreasing power of concentration, stop working immediately. These symptoms may be caused by excessively high exhaust gas concentrations.0478 111 9924 C - EN
A slope inclination of 25° corresponds to a vertical height increase of 46.6 cm for a 100 cm horizontal distance. In order to ensure an adequate oil supply for the engine, the information in the accompanying engine instruction manual must be additionally observed when using the machine on slopes. Working: Do not try to examine the blade while the lawn mower is operating. Rotating blades can cause injury. 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. Be particularly careful when turning the machine around or pulling it towards you. Risk of stumbling! Use the machine with great care when working near rubbish dumps, ditches and embankments. In particular, ensure that you maintain sufficient distance to such danger areas. Objects hidden in the grass (lawn sprinkler systems, posts, water valves, foundations, electrical wires, etc.) must be avoided. Never intentionally run over any such foreign objects. Beware of the cutting tool running on for several seconds before coming to a standstill. Switch off the engine, allow the work tool to come to a complete standstill and detach the spark plug socket – before leaving the machine unattended, – before re-filling the tank. Allow the engine to cool down before filling the tank. Fire hazard! – before remedying blockages, including those in the mowing deck housing, – before lifting or carrying the machine, – before transporting the machine, – before carrying out any work on the mowing blade, – before checking or cleaning the machine or before carrying out any other work (e.g. folding down the handlebar) on it, – after hitting a foreign object or if the lawn mower begins to vibrate excessively. In these cases check the machine, in particular the cutting unit (blade, blade shaft, blade fastening) for damage and carry out the necessary repairs before restarting and working with the machine. Switch off the engine: – When pushing the machine to and from the area to be worked. – Before pushing the machine onto an area not covered with grass. – When the machine has to be tilted for transportation. – Before adjusting the cutting height.
4.7 Maintenance and repairs
Before beginning cleaning, adjustment, repair and maintenance operations, park the machine on firm, level ground, stop the engine, allow it to cool down and detach the spark plug socket. Risk of injury Never place your hands or feet above, underneath or on rotating parts. Risk of injury! Strong vibrations are generally an indication of a fault. In particular, the lawn mower must not be operated with a damaged or bent blade shaft or mowing blade. If you do not have the appropriate expertise, have the necessary repairs carried out by a specialist dealer (VIKING recommends VIKING specialist dealers). Risk of injury due to the mowing blade! Pulling the recoil starter rope starts the work tool rotating. Always ensure sufficient distance between the mowing blade and your body, particularly your hands and feet, when you pull the recoil starter rope.35 DEFRNLITESPTNOSVFIDAPLHUHRLV EN 0478 111 9924 C - EN Allow the machine to cool down before working on or around the engine, exhaust manifold or muffler in particular. Temperatures of 80° C and above can be reached. Danger of burns Direct contact with engine oil can be dangerous. Engine oil must not be spilled. VIKING recommends leaving the task of topping up engine oil or performing engine oil changes to a VIKING specialist dealer. Cleaning: The complete machine must be cleaned thoroughly following use. (Ö 12.1) Remove accumulated clipping deposits using a stick. Clean the underside of the mower 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 VIKING machine. In order to prevent fire hazards, keep the area around the air vents, cooling ribs and the area of the exhaust 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. VIKING recommends that you have maintenance operations and repairs performed exclusively by a VIKING specialist dealer. VIKING specialist dealers regularly attend training courses and are provided with technical information. Only use tools, accessories or attachments approved for this machine by VIKING 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 VIKING tools, accessories and spare parts are optimally adapted to the machine and the user's requirements. Genuine VIKING spare parts can be recognised by the VIKING spare parts number, by the VIKING lettering and, if present, by the VIKING spare parts symbol. On smaller parts, only the symbol may be present. For safety reasons, fuel-carrying components (fuel line, fuel cock, fuel tank, tank cap, connections, etc.) must be checked regularly for damage and leaks and replaced by a technician if necessary (VIKING recommends VIKING specialist dealers). Always keep warning and information stickers clean and readable. Damaged or missing stickers must be replaced by new, original plates from your VIKING 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 cutting unit when wearing thick work gloves and exercising extreme care. Ensure that all nuts, pins and screws (in particular the blade fastening screw) are securely tightened so that the machine is in a safe operating condition. Check the entire machine 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. Never alter the basic setting of the engine or run at excessive engine speeds. Components or guards that are removed for maintenance operations must be properly reinstalled immediately.
4.8 Storage for prolonged periods
without operation Allow the engine to cool before storing the machine in an enclosed space. Allow the machine to cool down completely before covering it. Store the machine with empty fuel tank and the fuel reserve in a lockable and well- ventilated room. Ensure that the machine is protected from unauthorised use (e.g. by children). If the tank has to be emptied (e.g. to store the machine before the winter break), this should only be done out of doors (e.g. by running the tank empty). Thoroughly clean the machine before storage (e.g. winter break). Only store the machine with the spark plug socket disconnected. Store the machine in good operational condition.0478 111 9924 C - EN
Waste products such as used engine oil or fuel, used lubricants, filters, batteries and similar wearing parts can be harmful to people, animals and the environment, and must consequently be disposed of properly. Consult your recycling centre or your specialist dealer for information on the proper disposal of waste products. VIKING recommends VIKING specialist dealers. Ensure that old machines are properly disposed of. Render the machine unusable prior to disposal. In order to prevent accidents, remove the ignition lead, empty the fuel tank and drain the engine oil in particular. Risk of injury due to the mowing blade! Always store an old lawn mower in a safe place prior to scrapping. Ensure that the machine and particularly the mowing blade are kept out of the reach of children.
5. Description of symbols
Caution! Read the instruction man- ual before initial use. Risk of injury! Keep other persons out of the danger area. Risk of injury! Detach the spark plug socket before performing work on the cutting tool or maintenance and cleaning work. Risk of injury! Cutting tool runs on for sev- eral seconds after switching off (engine/blade brake). MB 4 R, MB 4 RT: Start the engine. MB 4 RTP: Start the engine. MB 4 R, MB 4 RT: Stop the engine. MB 4 RTP: Stop the engine. MB 4 RT: Switch on self-propulsion. MB 4 RTP: Switch on self-propulsion. MB 4 RTP: Wear hearing protection when working. Service position marking on the detent segment. (Ö 12.1)
6. Standard equipment
Item Designation Qty. A Basic unit with handlebar 1 B Cable clip 2 − Instruction manual 1 − Engine instruction manual 1 MB 4 R, MB 4 RT C Flat head bolts 2 D Quick-clamping devices 2 E Protective sleeves 2 MB 4 RTP F Flat head bolts 2 G Retaining washers 2 H Lock nuts 2 I Protective sleeves 2
● Place the machine on level and firm ground when performing all the operations described.
7.2 Assembling the handlebar
(MB 4 R, MB 4 RT) ● Fit the protective sleeves (E) onto the upper handlebar (1) with the long side facing inwards. ● Hold the upper handlebar (1) on the lower handlebar (2) and insert the screws (C) through the bores (3) from the inside outwards. ● Screw in the quick-clamping device (D) at the screws (C) (it should project by about one screw thread turn) and fold upwards. ● Check correct assembly: The quick-clamping devices (D) must be sufficiently tightened so that they are pressed tightly against the handlebar and the upper handlebar is firmly connected to the lower handlebar. If the handlebar is not firmly installed or the quick-clamping devices are not correctly located, fold open the quick clamping devices and adjust them to the correct position by screwing out and back in again.
7.3 Assembling the handlebar
(MB 4 RTP) ● Fit the protective sleeves (I) onto the upper handlebar (1) with the long side facing inwards. ● Hold the upper handlebar (1) on the lower handlebar (2) and insert the screws (F) through the bores (3) from the outside inwards. Fit the retaining washers (G) and lock nuts (H) and tighten to 22 - 28 Nm. ● Check correct assembly: The upper handlebar must be firmly fastened to the lower handlebar.
7.4 Installing the cable clip
● Fasten motorstop cable (1) to the left upper handlebar using cable clip (B). ● MB 4 RT, MB 4 RTP: Fasten self-propulsion cable (2) to the right upper handlebar using cable clip (B). Observe the following distances between the lower edge of the boot/panel and the cable clip: MB 4 R, MB 4 RT: 42 - 44 cm MB 4 RTP: 37 - 39 cm
7.5 Attaching the cable (MB 4 RT,
MB 4 RTP) ● Press the self-propulsion cable (1) into the guide (2) along the detent segment.
7.6 Fuel and engine oil
Fuel Use only fresh, environmentally friendly, good quality fuel: – Unleaded petrol Please consult the engine instruction manual for precise details on the fuel quality/octane rating. Engine oil Use only biodegradable engine oils. VIKING recommends the use of the following engine oils: – VIKING SAE 30 – VIKING 10W-30 Please consult the engine instruction manual for the oil capacity. Filling the fuel tank ● Unscrew the tank cap (1). ● Insert the funnel (2).
7. Preparing the machine for
operation Risk of injury! Observe the safety instructions in the section "For your safety" (Ö 4.).
Risk of injury! Observe the safety instructions in the "For your safety" section. (Ö 4.2) Check the oil filling level at regular intervals (see engine instruction manual). Use a suitably dimensioned funnel when filling the tank with fuel, in order to prevent the fuel from spilling.
● Hold the canister (3) steady and pour in the fuel carefully in several stages up to approx. 4 cm below the edge of the fuel tank. The more fuel has already been filled into the tank, the smaller the filling quantities should be for each filling operation. Keep checking the filling level of the tank at regular intervals while filling the tank; remove the funnel for this purpose. ● Screw the tank cap (1) back on again.
● Place the machine on level and firm ground when performing all the operations described.
8.2 Height adjustment of the
handlebar The height of the handlebar can be individually adjusted. ● Loosen nuts (1) and (2). ● Adjust the handlebar to a pleasant operating height by moving it upwards or downwards and hold it in position. ● Tighten the nuts (1) and (2) again.
8.3 Folding down the handlebar
The handlebar can be folded down for space-saving transport and storage of the mower. ● Stop the engine and remove the spark plug socket. (Ö 11.2) ● Detach the recoil starter rope. (Ö 8.4) ● MB 4 R, MB 4 RT: Hold the handlebar (1), open the left and right quick-clamping devices (2) and carefully fold the handlebar downwards to the front. ● MB 4 RTP: Hold the handlebar (1), loosen the left and right nuts (2) and carefully fold the handlebar downwards to the front.
8.4 Attaching and detaching the
recoil starter rope Attaching ● Detach the spark plug socket from the engine. ● Press the motorstop lever (1) to the handlebar and hold. ● Slowly pull out the recoil starter rope (2). ● Release the motorstop lever (1) and attach the recoil starter rope (2) to the rope guide (3). ● Connect the spark plug socket. Detaching ● Detach the spark plug socket from the engine. ● Detach the recoil starter rope (2) from the rope guide (3).
8.5 Cutting height adjustment
Five different cutting heights can be set. The highest cutting level (70 mm) is selected when the cutting height adjustment lever is in the rearmost position (see marking). The lowest cutting level (30 mm) is selected when the cutting height adjustment lever is in the frontmost position. ● Press the cutting height adjustment lever (1) outwards towards the rear wheel and hold in position. ● Set the cutting height adjustment lever (1) to the required position in the detent segment (2) and allow it to engage.
Risk of injury! Observe the safety instructions in the section "For your safety" (Ö 4.).
Danger of pinching! The handlebar can fold down or retract inadvertently when the quick-clamping device/handlebar screw fastening is released. For this reason, always hold the handlebar with one hand when you release the fastening.
Risk of injury! Stop the engine before adjusting the cutting height.
The lawn mower is equipped with a motorstop device. The engine stops when the motorstop lever is released during running operation. The engine and blade come to a standstill within 3 seconds. Measuring the run-on time Following engine start-up, the blade rotates and a wind noise is audible. The run-on time corresponds to the duration of the wind noise after the engine stops. This can be measured using a stopwatch.
10.1 General information on mulching
During mulching, the cut grass is chopped up several times through a special air flow guidance system in the mower blade area and then blown back into the turf. The clippings remain on the lawn. Benefits The decomposing clippings return organic nutrients to the soil, serving as a natural fertiliser. Advantages Emptying the grass catcher box and disposal of the clippings are dispensed with. Weed growth is slowed down and significant amounts of fertilizer are saved.
10.2 When is mulching permissible?
VIKING recommends mulching only when the lawn is dry and the grass is not too high. If the grass is too high, the lawn should be mowed in two stages. (Ö 10.3)
10.3 How should mulching be
performed? Requirements for good mulching results: – Set the optimal cutting height: A third of the grass height should be cut. – Use well sharpened blades. – Vary the mowing direction and ensure that the mowing strips overlap. Working method in high grass In high grass, the lawn should be cut in two stages. First stage: The lawn is mowed at the maximum cutting height. Second stage: 12 to 24 hours after the first stage, mulch the lawn to the desired grass height at right angles to the first mowing direction.
10.4 How often should mulching be
performed? To ensure a perfect, thick lawn, mulch regularly and keep the grass short. Main growth period: Spring: mulch at least twice per week. Summer and autumn: mulch at least once per week.
11.1 Starting the engine
● Press the motorstop lever (1) to the handlebar and hold. ● Slowly pull out the recoil starter rope (2) to the point of compression resistance. Then pull forcefully and quickly to arm's length. ● Slowly return the recoil starter rope (2) so that it is rolled up again. Repeat the procedure until the engine starts. Thanks to the fixed throttle setting, the engine always operates at the optimum working speed after starting.
Risk of injury! If the run-on time of the blade exceeds this delay, stop using the machine and take it to your specialist dealer.
10. Notes on working with
the machine Caution If the cutting height is too low or the grass is wet, the housing may become clogged, blocking the blade!
11. Operating the machine
Avoid damage to the machine. Top up the engine oil before starting for the first time (see engine instruction manual). Do not start the engine in tall grass or at the lowest cutting height. This makes starting difficult. 150478 111 9924 C - EN
11.2 Stopping the engine
● Release the motorstop lever (1). The engine and blade come to a standstill within 3 seconds.
11.3 Self-propulsion (MB 4 RT,
MB 4 RTP) Switching on self-propulsion ● Start the engine. (Ö 11.1) ● Pull the self-propulsion lever (1) to the handlebar and hold. Self-propulsion is switched on and the lawn mower moves forwards. Switching off self-propulsion ● Release the self-propulsion lever (1). Self-propulsion is switched off and the lawn mower comes to a standstill. The engine and blade continue to run. Annual service by the specialist dealer: The lawn mower should be inspected once annually by a specialist dealer. VIKING recommends VIKING specialist dealers.
12.1 Cleaning the machine
Maintenance interval: After each use. Placing machine in service position ● Set the cutting height adjustment lever to the highest position (1). (Ö 8.5) ● Loosen handlebar screw fastening/quick clamping device (2) and fold down upper handlebar (3) to the rear. ● Lift up the machine at the front and place in the service position as shown.
12.2 Checking blade wear
Maintenance interval: Before each use. Check procedure ● Place the machine in the service position. (Ö 12.1) ● Clean the mowing blade (1). The MB 4 RT and MB 4 RTP models feature front-wheel drive.
Risk of injury! Carefully read the section "For your safety" (Ö 4.), particularly the subsection "Maintenance and repairs" (Ö 4.7), and follow all safety instructions exactly before performing any maintenance or cleaning operations on the machine. Allow the machine too cool and detach the spark plug socket before performing any maintenance or cleaning operations. Risk of injury! Stop the engine, allow the machine to cool and detach the spark plug socket.
Risk of injury! Blades are subjected to differing degrees of wear depending on the location and duration of use. If you use the machine on sandy ground or use it frequently under dry conditions, the blade will be subjected to greater loads and will wear more quickly than the average. A worn blade may break off and cause serious injuries. The instructions for blade maintenance must therefore always be observed. Risk of injury! Observe the safety instructions in the "For your safety" section. (Ö 4.7)
DEFRNLITESPTNOSVFIDAPLHUHRLV EN 0478 111 9924 C - EN ● Use a slide calliper (A) to measure the blade thickness (A) at several points. ● Measure the permissible grinding (B). Place a ruler (3) against the front blade edge as shown for this purpose. Wear limits The blade thickness (A) must be at least
2.5 mm at any point. The most important
points are marked in the illustration. The cutting edges must not be ground back by more than 5mm - distance (B) (permissible grinding) during sharpening.
12.3 Sharpening the mowing blade
If you do not have the necessary expertise or auxiliary equipment, we recommend that you have the blade sharpened by a specialist dealer. Operation of the machine is impaired in the case of an incorrectly sharpened blade (incorrect sharpening angle, imbalance etc.). Sharpening instructions ● Remove the mowing blade. (Ö 12.4) ● Cool the mowing blade during sharpening, e.g. with water. The blade must not be allowed to display blue colouring, as this would reduce its cutting quality. ● Sharpen blades evenly to prevent vibration due to imbalance. ● Observe a sharpening angle of 30°. ● Observe the wear limits (Ö 12.2).
12.4 Removing and installing
mowing blade Removing ● Hold the mowing blade (1) and loosen the blade fastening screw (2). ● Remove the blade fastening screw (2), retaining washer (3) and mowing blade (1). Assembly ● Clean the blade contact surface and blade bushing (4). ● Secure the blade fastening screw (2) with Loctite 243. ● Fit the mowing blade (1) onto the blade bushing (4) as shown. MB 4 RTP: Make sure that the thrust washer (5) is positioned correctly. ● Position the retaining washer (3) as shown and tighten with the blade fastening screw (2) to 60 - 65 Nm.
Maintenance interval: See engine instruction manual. General information: Observe the operating and maintenance instructions contained in the attached engine instruction manual. To achieve a long service life, it is always particularly important to maintain a sufficient level of oil and to change the oil and air filter regularly. The recommended oil change intervals as well as information on engine oil and oil capacities can also be found in the engine instruction manual. The cooling ribs must always be kept clean to ensure that the engine is adequately cooled.
12.6 Storage (winter break)
Note the following points when storing the machine for long periods (winter break): ● Clean all external parts of the machine with care. ● Thoroughly lubricate/grease all moving parts. Risk of injury! Observe the safety instructions in the "For your safety" section. (Ö 4.7) Risk of injury! Always wear gloves. The mowing blade must be replaced if notches or cracks are detected or if a wear limit is reached (Ö 12.2).
Risk of injury! The prescribed tightening torque for the blade fastening screw must be observed. The retaining washer (3) must be replaced each time the blade is installed. The blade fastening screw (2) must be replaced each time the blade is replaced.0478 111 9924 C - EN
● Empty the fuel tank and carburettor (e.g. by running empty). ● Unscrew the spark plug (see engine instruction manual) and pour approx. 3 cm³ of engine oil into the engine via the spark plug hole. Turn the engine several times with the spark plug removed (pull the recoil starter rope). ● Screw the spark plug back in (see engine instruction manual). ● Perform an oil change (see engine instruction manual). ● Store the machine in a dry and locked place that is generally free of dust. Make sure that it is out of the reach of children.
Lifting or carrying the machine ● A Handlebar installed: Hold the machine at the front carrying handle (1) and at the handlebar (2). ● B Handlebar folded down: Hold the machine at the front carrying handle (1) and at the rear carrying handle (3). Transporting the machine Only transport the machine, on all four wheels, on a clean, level load floor. ● Secure the machine against slipping using suitable fastening materials. Fasten straps at the front carrying handle (1) and at the rear carryinghandle(3). Lawn clippings 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, valuable resources can be re-used. For this reason, the machine should be disposed of for recycling at the end of its useful life. Pay particular attention to the information in the "Disposal" section during disposal (Ö 4.9). Consult your recycling centre or your specialist dealer for information on the proper disposal of waste products. Important information on maintenance and care of the product group Petrol lawn mowers VIKING 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 VIKING machine:
Some parts of the VIKING 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: – Mowing blades – V-belt (MB 4 RT, MB 4 RTP) –Tyres
2. Compliance with the information in
this instruction manual The VIKING 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: Fire hazard! Keep the spark plug socket away from the spark plug hole due to the danger of ignition.
Risk of injury! Observe the section "For your safety" before transporting. (Ö 4.4) Carry the machine only with the help of a second person. Always wear suitable safety clothing (safety shoes, thick gloves). Detach the spark plug socket before lifting or transporting.
15. Minimising wear and
preventing damage43 DEFRNLITESPTNOSVFIDAPLHUHRLV EN 0478 111 9924 C - EN – Product modifications not approved by VIKING. – Use of fuel and lubricants not approved by VIKING (lubricants, petrol and engine oil, see engine manufacturer's specifications). – 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.
3. 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. VIKING recommends that you have maintenance operations and repairs performed exclusively by a VIKING specialist dealer. VIKING 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: – Corrosive 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. Mowing blade (mulching blade)
Blade fastening screw
We, VIKING GmbH Hans Peter Stihl-Strasse 5 A 6336 Langkampfen/Kufstein declare that the machine, Manually-operated lawn mower with combustion engine (MB) conforms to the following EU directives: 97/68/EC, 2000/14/EC, 2004/108/EC, 2006/42/EC The product has been developed in conformance with the following standards:
EN ISO 5395-1, EN ISO 5395-2
Applicable conformity assessment procedure: Appendix VIII (2000/14/EC) Name and address of relevant, named location: TÜV Rheinland LGA Products GmbH Tillystraße 2 D-90431 Nürnberg Compilation and storage of technical documentation: Johann Weiglhofer VIKING GmbH The year of manufacture and serial number appear on the identification plate of the machine. MB 4.0 R, MB 4.0 RT: Measured sound power level:
Guaranteed sound power level: 94 dB(A) MB 4.0 RTP: Measured sound power level:
The fastening elements for the mowing blade (e.g. blade fastening screw, retaining washer) must be replaced when replacing the blade, i.e. when installing the blade. Spare parts are available from a VIKING specialist dealer.
17. CE - manufacturer's
declaration of conformity manufacturer's brand: VIKING type: MB 4.0 R MB 4.0 RT MB 4.0 RTP Serial number 63830478 111 9924 C - EN
MB 4.0 R, MB 4.0 RT, MB 4.0 RTP
Serial number 6383 Fuel tank 1.4 l Cutting utilities Cutter bar Cutting width 53 cm Speed of cutting utilities 2800 rpm Safety device Motorstop Starter Rope start Tightening torque for blade fastening screw 60 - 65 Nm Cutting height 30 - 70 mm MB 4.0 R, MB 4.0 RT Engine, design 4-stroke com- bustion engine Engine type Kohler XT675 Fuel consumption 427 g/kWh (Medium) Displacement 149 ccm Nominal output at nominal speed
kW - rpm Engine output speed 2800 rpm In accordance with Directive 2000/14/EC: Guaranteed sound power level L WAd 94 dB(A) In accordance with Directive 2006/42/EC: Sound pressure level at workplace L
1db(A) Specified vibration characteristic in accordance with EN 12096: Measured value a
Measurement in accordance with EN 20643
MB 4.0 RT Drive: Front wheel 1 forward gear Wheel diameter (front) 200 mm Wheel diameter (rear) 200 mm Weight: MB 4.0 R 33 kg MB4.0RT 35kg L/W/H 140/57/107 cm MB 4.0 RTP Engine, design 4-stroke com- bustion engine Engine type Kohler XT8 Fuel consumption 441 g/kWh (Medium) Displacement 173 ccm Nominal output at nominal speed
kW - rpm MB 4.0 R, MB 4.0 RT Engine output speed 2800 rpm In accordance with Directive 2000/14/EC: Guaranteed sound power level L WAd 93 dB(A) In accordance with Directive 2006/42/EC: Sound pressure level at workplace L
1db(A) Specified vibration characteristic in accordance with EN 12096: Measured value a
Uncertainty Khw Measurement in accordance with EN 20643
Drive: Front wheel 1 forward gear Wheel diameter (front) 210 mm Wheel diameter (rear) 205 mm Weight 42 kg L/W/H 140/57/108 cm
# If necessary, contact a specialist dealer; VIKING recommends VIKING specialist dealers. @ See engine instruction manual. MB 4.0 RTP45 DEFRNLITESPTNOSVFIDAPLHUHRLV EN 0478 111 9924 C - EN Fault: Engine does not start Possible cause: – Motorstop lever not pressed. – No fuel in tank. – Fuel line blocked. – Inferior, dirty or old fuel in tank. – Air filter dirty. – Spark plug socket detached from spark plug; ignition lead not properly fastened to socket. – Spark plug dirty or damaged; incorrect electrode gap. Remedy: – Press motorstop lever to handlebar and hold. (Ö 11.1) – Refill fuel tank. (Ö 7.6) – Clean fuel line. , # – Always use fresh, good quality fuel, unleaded petrol; clean carburettor. , # – Clean air filter. , # – Connect spark plug socket; check connection between ignition lead and socket. , # – Clean or replace spark plug; adjust electrode gap. # Fault: Starting problems or deteriorating engine power. Possible cause: – Lawn mower housing blocked. – Mowing at an excessively low cutting height or propulsion speed is too high in relation to the cutting height. – Water in fuel tank and carburettor; carburettor blocked. – Fuel tank contaminated. – Air filter dirty. – Spark plug dirty. Remedy: – Clean lawn mower housing (detach spark plug socket!). (Ö 12.1) – Select a higher cutting height or reduce the pushing speed. (Ö 8.5) – Empty fuel tank, clean fuel line and carburettor. # – Clean fuel tank. # – Clean air filter. # – Clean spark plug. # Fault: Engine overheating. Possible cause: – Oil level in engine too low. – Cooling ribs dirty. Remedy: – Change engine oil. (Ö 12.5) – Clean cooling ribs. (Ö 12.1) Fault: Excessive vibration during operation. Possible cause: – Cutting unit defective. – Engine mounting loose. Remedy: – Check mowing blade, blade shaft and blade fastening (blade fastening screw and retaining washer), and repair if necessary. # – Tighten engine mounting bolts. # Fault (MB 4 RT, MB 4 RTP): No drive when self-propulsion lever is actuated Possible cause: – Self-propulsion cable damaged (e.g. kinked) Remedy: – Replace cable # Fault: Poor cut, lawn turning yellow Possible cause: – Mowing blade is blunt or worn, Remedy: – Sharpen or replace the mowing blade (Ö 12.3), (Ö 12.4), #
Please hand this instruction manual to your VIKING specialist dealer in the case of maintenance work. He will confirm the service operations performed in the pre-printed boxes. Service performed on Next service date