Operator’s manual Manuel d’utilisation Manual de instrucciones B28 B 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? 8 27 1 2 9 3 7 5 17 28 4 12 11 18 19 20 6 10 16 1 14 22 21 15 13 21 24 4 26 4 25 23 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 Shaft Handlebar Throttle control Stop switch Throttle lock--out Harness clamp Cylinder cover Starter handle Fuel tank Choke control Primer bulb 115430026 Rev. 4 2/17/12 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29.
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 WARNING: Never use a cutting attachment without an approved guard. See the section on “Technical data”. If an incorrect or faulty guard is fitted this can cause serious personal injury. 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.
GENERAL SAFETY PRECAUTIONS In countries that have a warm and dry climate there is a significant risk of fire. We therefore fit mufflers with a spark arrestor mesh. Blade retainer nut A blade retainer nut is used to secure some types of cutting attachment. Muffler bolts Spark arrestor mesh For mufflers, it is very important that you follow the instructions on checking, maintaining, and servicing your machine. Never use a machine that has a faulty muffler.
GENERAL SAFETY PRECAUTIONS Cutting equipment Grass blades and grass cutters are intended for cutting coarse grass. A trimmer head is intended for trimming grass. General rules 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.
ASSEMBLY NOTE: Make sure unit is assembled correctly as shown in this manual. Fitting the handlebar S Remove the screw at the rear of the throttle handle. S Slide the throttle handle onto the right side of the handlebar (see illustration). S Align the screw hole in the throttle handle with the hole in the handlebar. S Refit the screw in the hole in the rear of the throttle handle. S Screw the screw through the handle and handlebar. Tighten the screw. S Fit the mounting components as shown.
ASSEMBLY Correct height Adjust the harness so that the cutting attachment is parallel to the ground. Fitting a blade guard, grass blade and grass cutter G F E D B Correct balance Let the cutting attachment rest lightly on the ground. If you use a grass blade, it should balance about 10 cm above the ground to prevent contact with stones and the like. Adjust the position of the harness clamp to balance the unit correctly.
ASSEMBLY Fitting the trimmer guard and trimmer head S Hook the trimmer guard/combination guard (A) onto the fitting on the shaft and secure with the bolt (D). D C B A A S Turn the shaft until one of the holes in the dust cup (B) aligns with the corresponding hole in the gearbox. S Insert a small screwdriver (C) in the hole to lock the shaft. S Screw on the trimmer head (E) in the opposite direction to the direction of rotation. E S To dismantle, follow the instructions in the reverse order.
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 For throttle handles with a start throttle lock--out: 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 life span of the machine can be reduced and the risk of accidents can increase if machine maintenance is not carried out correctly and if service and/or repairs are not carried out professionally. If you need further information, please contact your nearest authorised service dealer. 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 Muffler bolts 0.024 inch (0.6 mm) Spark arrestor mesh CAUTION! Never use a machine that has a faulty or loose muffler. Ensure the muffler bolts are tight. CAUTION! Always use the recommended spark plug type! Use of the wrong spark plug can damage the piston/cylinder. 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.
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. 115430026 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 B 28B 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 B 28B (M10 LH arbor shaft thread) -- Centre hole in blades/cutters, ∅ 25,4 mm Approved accessories Type Cutting attachment /guard, part. no.
Trimmer Head Line Loading Instructions 1 2 3 6m 20i 3m 10i 4 5 6 7 8 9 115430026 Rev.
Plastic Blades (Tri Cut) 1 2 3 5 4 6 7 8 115430026 Rev.
