Operator’s manual Manuel d’utilisation Manual de instrucciones B28 PS Please read the operator’s manual carefully and make sure you understand the instructions before using the machine. Lire attentivement et bien assimiler le manual d’utilisation avant d’utiliser la machine. Lea detenidament el manual de instrucciones y asegúrese de entender su contenido antes de utilizar la máquina.
SYMBOL EXPLANATION Symbols This product is in accordance with applicable EC directives. WARNING: Careless or incorrect use of clearing saws, brushcutters, and trimmers can result in serious or fatal injury to the operator or others. Please read the operator’s manual carefully and make sure you understand the instructions before using the machine. Always wear: S A protective helmet where there is a risk of falling objects S Hearing protection S Approved eye protection Max.
CONTENTS Contents KEY TO SYMBOLS Symbols . . . . . . . . . . . . . . . . . . . . . . . . . 2 CONTENTS Contents . . . . . . . . . . . . . . . . . . . . . . . . 3 Note the following before starting . . . . 3 WHAT IS WHAT? What is what? . . . . . . . . . . . . . . . . . . . 4 GENERAL SAFETY PRECAUTIONS Important . . . . . . . . . . . . . . . . . . . . . . . . 5 Personal protective equipment . . . . . . 5 Machine’s safety equipment . . . . . . . . 6 Cutting equipment . . . . . . . . . . . . . . . . .
WHAT IS WHAT? 2 3 6 1 29 5 7 11 4 9 12 10 19 13 20 28 21 18 8 1 17 15 23 22 16 14 22 25 4 27 4 26 24 What is what? 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. Blade Grease filler cap Bevel gear Cutting attachment guard Upper shaft Lower shaft Loop handle Throttle control Stop switch Throttle lock--out Harness clamp Cylinder cover Starter handle Fuel tank Choke control 115432326 Rev. 4 2/17/12 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30.
GENERAL SAFETY PRECAUTIONS Important IMPORTANT! The machine is only designed for trimming grass, grass clearing and/or forestry clearing. The only accessories you can operate with this engine unit are the cutting attachments we recommend in the section on Technical data. Never use the machine if you are tired, if you have drunk alcohol, or if you are taking medication that could affect your vision, your judgement or your co--ordination.
GENERAL SAFETY PRECAUTIONS GLOVES Gloves should be worn when necessary, e.g., when fitting cutting attachments. BOOTS Wear anti--slip and stable boots. WARNING: Never use a machine that has faulty safety equipment! Follow the control, maintenance and service instructions described in this section. If your machine fails any of these checks contact your service agent to get it repaired.
GENERAL SAFETY PRECAUTIONS See instructions under the heading Start. Start the machine and apply full throttle. Release the throttle and check that the cutting attachment stops and remains at a standstill. If the cutting attachment rotates with the throttle in the idle position then the carburettor idle setting must be checked. See instructions under the heading Maintenance. Use of incorrectly wound trimmer line or an incorrect cutting attachment increases the level of vibration.
GENERAL SAFETY PRECAUTIONS Cutting equipment CAUTION: Mufflers fitted with catalytic converters get very hot during use and remain so for some time after stopping. This also applies at idle speed. Contact can result in burns to the skin. Remember the risk of fire! WARNING: The inside of the muffler contains chemicals that may be carcinogenic. Avoid contact with these elements in the event of a damaged muffler.
GENERAL SAFETY PRECAUTIONS General rules Trimmer head Only use cutting attachments with the guards we recommend! See the section on Technical data. Check the cutting attachment for damage or cracks. A damaged cutting attachment should always be replaced. WARNING: Use of an incorrect or damaged blade could result in serious injury or death. Always discard a blade that is bent, twisted, cracked, broken or damaged in any other way. Never attempt to straighten a twisted blade so that it can be reused.
ASSEMBLY NOTE: Make sure unit is assembled correctly as shown in this manual. S Push the attachment into the coupling until the locking/release button snaps into the primary hole (C). Fitting the loop handle S Position the handle on the shaft. Note that the handle must be mounted between the two arrows on the shaft. C S Before using the unit, tighten the knob securely. S Fit the screw, securing plate and wing nut as shown in the diagram.
ASSEMBLY Fitting the harness WARNING: When using a brushcutter, it must always be hooked securely to the harness. Otherwise, you will be unable to control the brushcutter safely. This can result in injury to yourself or others. Proper harness and handlebar adjustments must be made with the engine completely stopped before using unit. Fitting the harness clamp S Place the upper harness clamp over the shaft and position the lower harness clamp under the shaft. Align the upper and lower clamp screw holes.
ASSEMBLY Fitting blades WARNING: When fitting blades, it is extremely important that the raised section on the retaining washer engages correctly in the centre hole of the blade. If the blade is fitted incorrectly, it can result in serious and/or fatal personal injury. S Place the cupped washer (F) onto the shaft with the cupped side of the washer toward the blade. S Install the blade retainer nut (G). Tighten the nut using the wrench (provided).
FUEL HANDLING Fuel safety Petrol Never start the machine: 1. If you have spilled fuel on it. Wipe off the spillage and allow remaining fuel to evaporate. 2. If you have spilled fuel on yourself or your clothes, change your clothes. Wash any part of your body that has come in contact with fuel. Use soap and water. 3. If the machine is leaking fuel. Check regularly for leaks from the fuel cap and fuel lines.
FUEL HANDLING Mixing S Always mix the petrol and oil in a clean container intended for fuel. S Always start by flling half the amount of the petrol to be used. Then add the entire amount of oil. Mix (shake) the fuel mixture. Add the remaining amount of petrol. S Mix (shake) the fuel mixture thoroughly before filling the machine’s fuel tank. S Do not mix more than one month’s supply of fuel at a time. S If the machine is not used for some time, the fuel tank should be emptied and cleaned.
STARTING AND STOPPING Check before starting S Check the blade to ensure that no cracks have formed at the bottom of the teeth or by the centre hole. Discard a blade if cracks are found. WARNING: Use of an incorrect or damaged blade could result in serious injury or death. Always discard a blade that is bent, twisted, cracked, broken or damaged in any other way. Never attempt to straighten a twisted blade so that it can be reused. Only use original blades of the specified type.
STARTING AND STOPPING Stopping Stop the engine by pushing and holding the stop switch in the STOP position until the engine stops. NOTE: If engine dies, return blue engine choke lever to the HALF CHOKE (½) position and pull starter rope until engine starts and runs. Then, move the blue engine choke lever to the OFF CHOKE (opened) position). CAUTION! Do not pull the starter cord all the way out and do not let go of the starter handle when the cord is fully extended. This can damage the machine.
WORKING TECHNIQUES General working instructions IMPORTANT! This section describes the basic safety precautions for working with trimmers. If you encounter a situation where you are uncertain how to proceed you should ask an expert. Contact your servicing dealer. Avoid all usage which you consider to be beyond your capability. You must understand the difference between forestry clearing, grass clearing and grass trimming before use. Basic safety rules The ABC of clearing Always use the correct equipment.
WORKING TECHNIQUES Grass clearing using a grass blade Grass trimming with a trimmer head Trimming S Grass blades and grass cutters must not be used on woody stems. S A grass blade is used for all types of tall or coarse grass. S The grass is cut down with a sideways, swinging movement, where the movement from right--to--left is the clearing stroke and the movement from left--to--right is the return stroke. Let the left--hand side of the blade (between 8 and 12 o’clock) do the cutting.
WORKING TECHNIQUES Cutting S The trimmer is ideal for cutting grass that is difficult to reach using a normal lawn mower. Keep the trimmer line parallel to the ground when cutting. Avoid pressing the trimmer head against the ground as this can ruin the lawn and damage the tool. WARNING: Sometimes branches or grass get caught between the guard and cutting attachment or wrapped around the shaft.
MAINTENANCE The owner is responsible for the performance of all required maintenance as defined in the operator’s manual. Idle Speed Screw--T Carburetor Your McCulloch product has been designed and manufactured to specifications that reduce harmful emissions. After the engine has used 8--10 tanks of fuel, the engine will be run--in.
MAINTENANCE CAUTION: Mufflers fitted with catalytic converters get very hot during use and remain so for some time after stopping. This also applies at idle speed. Contact can result in burns to the skin. Remember the risk of fire! WARNING: The inside of the muffler contain chemicals that may be carcinogenic. Avoid contact with these elements in the event of a damaged muffler. Two--piece shaft The drive shaft end in the lower shaft should be lubricated with grease every 30 hours.
MAINTENANCE Bevel gear The bevel gear is filled with the right quantity of grease at the factory. However, before using the machine you should check that the bevel gear is filled three--quarters full with grease. The grease in the bevel gear does not normally need to be changed except if repairs are carried out. 115432326 Rev.
MAINTENANCE Maintenance schedule The following is a list of the maintenance that must be performed on the machine. Most of the items are described in the Maintenance section. The user must only carry out the maintenance and service work described in this Operator’s Manual. More extensive work must be carried out by an authorised service workshop. Maintenance Clean the outside of the machine. Make sure the throttle trigger lock and the throttle function correctly from a safety point of view.
TECHNICAL DATA Technical data B28 PS Engine 28 Cylinder displacement, cm3 Cylinder bore, mm 35 Stroke, mm 28,7 Idle speed, rpm 2800--3200 Recommended max. fast idle speed, rpm 11000 Speed of output shaft, rpm 8000 Max. engine output, acc.
TECHNICAL DATA Model B28 PS (M10 LH arbor shaft thread) -- Centre hole in blades/cutters, ∅ 25,4 mm Approved accessories Type Cutting attachment /guard, part. no. Grass blade/grass cutter Grass (∅ 20 cm, 4--teeth) 578 85 18--01 / 578 88 05--01 Trimmer head P25 (∅ 2,4 -- 2,7 mm line) 537 41 92--20 / 578 88 05--01 Plastic blades Tri--cut 300 mm (separate 531 00 38--11 / 578 88 05--01 blades have part number 531 00 77--15) Attachments Part. no.
Trimmer Head Line Loading Instructions 1 2 3 6m 20i 3m 10i 4 5 6 7 8 9 115432326 Rev.
Plastic Blades (Tri Cut) 1 2 3 5 4 6 7 8 115432326 Rev.
