Jonsered GR41 Operator's Manual
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- Operator's manual (36 pages)
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Summary of Contents for Jonsered GR41
- Page 1 Operator's manual Please read these instructions care- fully and make sure you understand them before using the machine.
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Page 2: Symbol Explanation
SYMBOL EXPLANATION Symbols • Always wear approved protective WARNING! Clearing saws, gloves. brushcutters and trimmers can be dangerous! Careless or incorrect use can result in serious or fatal injury to the operator or others. • Use anti-slip and stable boots. Read through the Operator‘s Manual carefully and understand the content before using the machine. -
Page 3: Table Of Contents
Under no circumstances may the design WHAT IS WHAT? of the machine be modified without the What is what on the clearing saw (GR41/GR50/RS44)? ..17 permission of the manufacturer. Always use genuine accessories. Non-authorised What is what on the clearing saw (RS51)? ......18... -
Page 4: Safety Instructions
SAFETY INSTRUCTIONS Personal protective equipment The machine‘s safety equipment This section describes the machine‘s safety equipment, its IMPORTANT INFORMATION function and how checks and maintenance are carried out to • Incorrect or careless use of a clearing saw, ensure that it operates correctly. (See the chapter “What is brushcutter or trimmer can turn it into a dangerous what“... - Page 5 SAFETY INSTRUCTIONS 2. Stop switch 4. Anti-vibration system The stop switch should be Your machine is equipped used to stop the engine. with an anti-vibration system that has been designed to give as vibration- free and comfortable usage as possible. The use of incorrectly wound cord or blunt, incorrect cutting equipment...
- Page 6 SAFETY INSTRUCTIONS 6. Muffler 7. Cutting equipment The muffler is designed to give the lowest possible noise 1) Clearing blades are level and to direct the intended for cutting wood. engine‘s exhaust fumes away from the operator. Muffler fitted with catalytic converter is also designed to reduce harmful exhaust components.
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Page 7: Control, Maintenance And Service Of The Machine's Safety Equipment
SAFETY INSTRUCTIONS Control, maintenance and service of • See section "Start". Start the machine and apply full the machine‘s safety equipment throttle. Release the throttle and check that the IMPORTANT INFORMATION cutting equipment stops and remains at a standstill. • All service and repairs to the machine require If the cutting equipment special training. - Page 8 SAFETY INSTRUCTIONS 3. Cutting 5. Muffler attachment guard 1. Never use a machine that has a defective muffler. • Check that the guard is undamaged and not 2. Check regularly that the cracked. muffler is secure. • Replace the guard if it has 3.
- Page 9 SAFETY INSTRUCTIONS 6. Cutting equipment 7. Quick-release This section describes how through correct maintenance and • Check that the harness through using the right type of cutting equipment you can: straps are correctly • Reduce the machine‘s tendency to kickback positioned.
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Page 10: Cutting Equipment
SAFETY INSTRUCTIONS Cutting equipment Sharpening the grass blade IMPORTANT INFORMATION • See the cutting The section describes how through correct mainte- equipment’s packaging for nance and through using the right type of cutting correct filing instructions. equipment you can reduce the machine‘s tendency to kickback, obtain maximum clearing capacity and increase the service life of the cutting equipment. -
Page 11: General Safety Instructions
SAFETY INSTRUCTIONS General safety instructions Fuel safety IMPORTANT INFORMATION • Never fill the machine • The machine is only designed for trimming grass, while the engine is brush cutting and/or forestry clearing. running. Always stop the engine and let it cool for a •... -
Page 12: General Working Instructions
SAFETY INSTRUCTIONS General working instructions 4. Take great care when cutting a tree that is subject to tension. A tree that is IMPORTANT INFORMATION under tension can spring back to its original position • This section takes up the basic safety precautions both before and after being for working with the clearing saw and trimmer. -
Page 13: Basic Clearing Techniques
SAFETY INSTRUCTIONS Adjusting the harness and clearing saw Basic clearing techniques WARNING! • Always carry out clearing and trimming at full throttle. When working with the clearing saw it should always be hooked in the harness. If • Always drop to idling speed after each working operation. this is not done, you cannot control the Longer periods running at full throttle without loading the clearing saw safely and this can result in... - Page 14 SAFETY INSTRUCTIONS Clearing‘s ABC Forestry clearing using a saw blade Always use the correct equipment. Always have well adjusted equipment. • When applying the blade Follow the safety instructions. to heavier stems the risk of Organise the work well. kickback increases. You Always use full throttle when applying the blade.
- Page 15 SAFETY INSTRUCTIONS • Large stems must be cut Brush cutting using a grass blade from two sides. Determine in which • A blade is used for all direction the stem types of high or thick should fall. First apply grass. the saw to the felling side.
- Page 16 SAFETY INSTRUCTIONS Grass clearing Trimming • The trimmer is ideal to using the trimmer cut grass that is difficult head to reach using a normal lawn mower. Keep the • Hold the trimmer head cord parallel to the just above the ground at ground when cutting.
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Page 17: What Is What
WHAT IS WHAT? RS44 What is what on the clearing saw (GR41/GR50/RS44)? Blade Handlebar adjustment Grease filler cap Locking nut Angle gear Support flange Blade guard Support cup Shaft Drive disc Handlebars Trimmer head Throttle Socket spanner Stop switch Operator‘s Manual... -
Page 18: What Is What On The Clearing Saw (Rs51)
WHAT IS WHAT? What is what on the clearing saw (RS51)? Blade Air filter cover Grease filler cap Clutch cover Angle gear Handlebar adjustment Blade guard Locking nut Shaft Support flange Handlebars Drive disc Throttle Socket spanner Stop switch Operator‘s Manual Throttle trigger lock Transport guard Suspension for clearing saw... -
Page 19: Assembly
ASSEMBLY Assembling the handlebars Transport position, handlebars • The handlebars can easily • Remove the screw at the be turned to fit along the rear of the throttle shaft for easy handle. transportation and storage. • Loosen the knob. Turn the •... -
Page 20: Assembly Of The Blade And Trimmer Head
ASSEMBLY Assembly of the blade and trimmer Assembling the blade guard and head clearing blade It is extremely important • The guard (A) is fitted that the disc drive’s/support using 4 screws (L) as set flange’s guide engages out in the diagram. correctly in the cutting NOTE! Use the equipment’s centre hole... -
Page 21: Assembling The Spray Guard And Trimmer Head Trimmy Sii
ASSEMBLY Assembling the spray guard and Adjusting the harness and clearing trimmer head Trimmy SII • Fit the correct guard (A) WARNING! for working with a When working with the clearing saw it should always be hooked in the harness. If trimmer head. -
Page 22: Fuel Handling
• For the best results use JONSERED two-stroke oil, which has been specially produced for clearing saws and chain saws. Mixing ratio 1:50 (2%). Gasolin Oil • Öl • If JONSERED two-stroke oil is not available you can use a Benzin Huile • Aceite Essence Lit. -
Page 23: Start And Stop
The start throttle or that the blade has been position is obtained by used with dull teeth. setting the choke control in GR41/50 Discard a blade if cracks the choke position and then RS44 are found. returning it to its original •... -
Page 24: Maintenance
Basic setting • The carburettor is set to its basic setting when test run at the Your JONSERED product has been designed and factory. The basic setting is richer than the optimal setting manufactured to specifications that reduce harmful emissions. -
Page 25: Muffler
1. An air intake on the to 3/4 with grease. Use starter unit. JONSERED special grease. 2. Cooling fins on the flywheel. Normally, the grease does 3. Cooling fins on the not need to be changed... -
Page 26: Spark Plug
MAINTENANCE Spark plug Sharpening the clearing blade The condition of the spark WARNING! plug is affected by: Incorrect cutting equipment or an • An incorrect carburettor incorrectly sharpened blade increases setting. the risk of kickback. 0,5 mm • An incorrect fuel mixture (too much or •... -
Page 27: Maintenance Schedule
MAINTENANCE Maintenance schedule Weekly maintenance Below follows some general maintenance instructions. 1. Check the starter, the If you need further information please contact your service workshop. starter cord and the return spring. Daily maintenance 2. Make sure that the 1. Clean the outside of the vibration damping clearing saw. -
Page 28: Technical Data
MAINTENANCE Monthly maintenance 1. Clean the fuel tank. 2. Clean the carburettor and the area surrounding it. 3. Clean the fan and the area around it. 4. Check the fuel filter and the fuel pipe, replace if necessary. 5. Check all cables and connections. - Page 29 TECHNICAL DATA Technical data GR 41 GR 50 RS 44 RS 51 Engine Cylinder capacity, cm cu. inch 40,2 48,7 44,3 50,8 Cylinder bore, mm/inch Stroke length, mm/inch Idling speed, rpm 2 500 2 500 2 500 2 700 Recommended max. speed, rpm 12 500 12 500 12 500...
- Page 30 TECHNICAL DATA Approved accessories GR41/GR50 Type Cutting attachment guard Art No. Centre hole in saw blades/knives, ∅ 20 mm Thread output axle M12 Grass blade/grass knife Multi 255-3 (∅ 255 3-teeth) 502 26 34-03 Grass 275-4 (∅ 275 4-teeth) 502 26 34-03 Multi 275-4 (∅...
- Page 31 We, Jonsered, S-561 82 Huskvarna, Sweden, tel: +46 36-146500, declare under sole responsibility that the clearing saws GR41, GR50, RS44 and RS51 from 1997’s serial numbers and onwards (the year is clearly stated in plain text on the type plate with subsequent serial number), are in conformity with the following standards or other normative documents following the provisions in the COUNCIL’S DIRECTIVES:...