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THANK YOU FOR BUYING A RYOBI PRODUCT.

To ensure your safety and satisfaction, carefully read 

through this OWNER’S MANUAL before using the 

product.

GENERAL SAFETY RULES

WARNING! 

Read all instructions. Failure to follow all 

instructions listed below may result in electric shock, fire and/

or serious injury. The term “power tool” in all of the warnings 

listed below refers to your mains operated (corded) power 

tool or battery-operated (cordless) power tool.

Work Area Safety

 

Keep work area clean and well lit. Cluttered and dark 

areas invite accidents.

 

Do not operate power tools in explosive atmospheres, 

such as in the presence of flammable liquids, gases or 

dust. Power tools create sparks which may ignite the 

dust or fumes.

 

Keep children and bystanders away while operating a 

power tool. Distractions can cause you to lose control.

Electrical Safety

 

Power tool plugs must match the outlet. Never modify 

the plug in any way. Do not use any adapter plugs with 

earthed (grounded) power tools. Unmodified plugs and 

matching outlets will reduce risk of electric shock.

 

Avoid body contact with earthed or grounded surfaces 

such as pipes, radiators, ranges and refrigerators. There 

is an increased risk of electric shock if your body is 

earthed or grounded.

 

Do not expose power tools to rain or wet conditions. 

Water entering a power tool will increase the risk of 

electric shock.

 

Do not abuse the cord. Never use the cord for carrying, 

pulling or unplugging the power tool. Keep cord away 

from heat, oil, sharp edges or moving parts. Damaged or 

entangled cords increase the risk of electric shock.

 

When operating a power tool outdoors, use an extension 

cord suitable for outdoor use. Use of a cord suitable for 

outdoor use reduces the risk of electric shock.

 

If operating a power tools in a damp location is 

unavoidable, use a residual current device (RCD) 

protected supply. Use of an RCD reduces the risk of 

electric shock.

Personal Safety

 

Stay alert, watch what you are doing and use common 

sense when operating a power tool. Do not use a power 

tool while you are tired or under the influence of drugs, 

alcohol or medication. A moment of inattention while 

operating power tools may result in serious personal 

injury.

 

● Use safety equipment. Always wear eye protection. 

Safety equipment such as dust mask, non-skid 

safety shoes, hard hat, or hearing protection used for 

appropriate conditions will reduce personal injuries.

 

Avoid accidental starting. Ensure the switch is in the off 

position before plugging in. Carrying power tools with 

your finger on the switch or plugging in power tools that 

have the switch on invites accidents.

 

Remove any adjusting key or wrench before turning 

the power tool on. A wrench or a key left attached to a 

rotating part of the power tool may result in personal 

injury.

 

Do not overreach. Keep proper footing and balance at 

all times. This enables better control of the power tool in 

unexpected situations.

 

Dress properly. Do not wear loose clothing or jewellery. 

Keep your hair, clothing and gloves away from moving 

parts. Loose clothes, jewellery or long hair can be caught 

in moving parts.

 

If devices are provided for the connection of dust 

extraction and collection facilities, ensure these are 

connected and properly used. Use of these devices can 

reduce dust related hazards.

Power Tool Use and Care

 

Do not force the power tool. Use the correct power tool 

for your application. The correct power tool will do the job 

better and safer at the rate for which it was designed.

 

Do not (use the power tool if the switch does not turn it 

on and off. Any power tool that cannot be controlled with 

the switch is dangerous and must be repaired.

 

Disconnect the plug from the power source before 

making any adjustments, changing accessories, or 

storing power tools. Such preventive safety measures 

reduce the risk of starting the power tool accidentally.

 

Store idle power tools out of the reach of children and do 

not allow persons unfamiliar with the power tool or these 

instructions to operate the power tool.  Power tools are 

dangerous in the hands of untrained users.

 

Maintain power tools. Check for misalignment or binding 

of moving parts, breakage of parts and any other 

condition that may affect the power tools operation. If 

damaged, have the power tool repaired before use.  

Many accidents are caused by poorly maintained power 

tools.

 

Keep cutting tools sharp and clean. Properly maintained 

cutting tools with sharp cutting edges are less likely to 

bind and are easier to control.

 

Use the power tool, accessories and tool bits etc., in 

accordance with these instructions and in the manner 

intended for the particular type of power tool, taking 

into account the working conditions and the work to be 

performed. Use of the power tool for operations different 

from intended could result in a hazardous situation.

Service

 

● Have your power tool serviced by a qualified repair 

person using only identical replacement parts. This will 

ensure that the safety of the power tool is maintained.

SPECIFIC RULES FOR CHAIN SAWS

 

CLEAR THE WORK AREA. Before starting cutting 

operations, ensure that you have a clear work area, 

secure footing and a carefully planned path of retreat 

from the falling tree.

 

STAY ALERT. Keep all parts of the body away from the 

chain saw while the motor is running. Ensure that the 

chain saw is not contacting anything before starting it.

 

DAMAGED PARTS. Do not operate a chain saw that is 

damaged, incorrectly adjusted, or that is not completely 

and securely assembled. Check to ensure that the chain 

saw stops moving when the trigger is released.

 

CONSIDER THE WORK ENVIRONMENT. Be extremely 

cautious when cutting small saplings and branches 

because the slender material may catch on the saw 

chain and can be whipped towards you or pull you off 

balance. Do not operate a chain saw in a tree unless you 

have received specific training in how to do so. When 

cutting a limb that is under tension, watch out for spring 

Summary of Contents for CS-1840

Page 1: ...CS 1840 CS 2040 ...

Page 2: ... 1 1 2 CS 1840 CS 1840 1 1 2 4 7 2 7 8 5 9 10 11 11 12 12 6 3 3 CS 2040 ...

Page 3: ... 2 3 4 CS 2040 1 1 2 2 4 4 3 13 6 14 9 15 11 11 12 12 8 7 3 5 ...

Page 4: ... 3 5 6 7 8 Chain oil 9 10 CS 1840 CS 2040 Break engaged ...

Page 5: ... 4 11 12 135 135 45 45 90 13 14 50mm or 1 10 50mm Felling back cut Notch Felling back cut Hinge 15 16 Break released ...

Page 6: ... 5 1 2 17 18 19 20 2 3 1 1 3 1 2 3 4 21 22 ...

Page 7: ... 6 23 24 25 26 27 27 28 ...

Page 8: ... control of the power tool in unexpected situations Dress properly Do not wear loose clothing or jewellery Keep your hair clothing and gloves away from moving parts Loose clothes jewellery or long hair can be caught in moving parts If devices are provided for the connection of dust extraction and collection facilities ensure these are connected and properly used Use of these devices can reduce dus...

Page 9: ...lly the top quarter of the guide bar contacts wood or any other solid object In this case the saw will be uncontrolled and will be hurled towards the operator at full power Kickback can lead to loss of control of the chain saw which is extremely dangerous To avoid kickback a Hold the chain saw firmly with both hands b Do not over reach c Do not let the nose of the guide bar contact a log branch th...

Page 10: ...procket cover and tighten gently with chain tension locking knob Tightening The Saw Chain CS 1840 1 While holding up the tip of the bar adjust the chain tension by turning the chain tension adjust screw Turn clockwise to tension the chain or turn counterclockwise to loosen Fig 5 2 Tighten the guide bar fixing knob securely with the bar tip held up Then check the chain for smooth rotation and prope...

Page 11: ...nsaw with both hands Top side of wood under tension Wood will spring up Bottom side of wood under tension Wood will spring downwards Thick trunks and high tension Tree will move suddenly with immense force Both sides of trunk under tension Tree will move sideways Felling Trees Fig 14 WARNING Felling trees is dangerous and requires practice If you are a beginner or inexperienced do not try to teach...

Page 12: ... horse or another log while bucking Keep a clear cutting area Make sure that no objects can contact the guide bar nose and chain during cutting this can cause Kickback Refer to Kickback in the Specific Safety Rules section of this manual for more information During bucking operations stand on the uphill side so that the cut off section of the log cannot roll over you Sometimes it is impossible to ...

Page 13: ... the cutting edge is removed 5 Count the number of strokes given to the cutter as a reference basis and file away the same number of strokes on all other cutters 6 If after sharpening a few times the depth gauge protrudes from the template you must reset its level using a flat file Fig 25 7 Finally round off the depth gauge Fig 26 Guide bar The guide bar is subjected to especially severe wear and ...

Page 14: ... 13 NOTE ...

Page 15: ... 14 NOTE ...

Page 16: ... 15 ...

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