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English (Original Instructions)

the risk of cut injuries,wear pants or chaps that 

contain pads of cut retardant material. Never wear 

scarves,ties,jewellery or other items of clothing,which 

might get caught  in the equipment, in brush or on 

branches. Secure hair so it is above shoulder.

 

Wear safety boots with a good tread (with non-slip 

soles). 

 

Wear non-slip, heavy-duty protective gloves. 

 

Wear eye protection with side shields marked to 

comply with EN 166 as well as hearing and head 

protection when operating the product.

REFUELLING (DO NOT SMOKE!)

 

To reduce the risk of fire and burn injury, handle fuel 

with care. It is highly flammable.

 

Mix and store fuel in a container approved for petrol.

 

Mix fuel outdoors where there are no sparks or flames.

 

Select bare ground, stop the engine, and allow it to 

cool before refuelling.

 

Loosen the fuel cap slowly to release pressure and to 

keep fuel from escaping around the cap.

 

Tighten the fuel cap securely after refuelling.

 

Wipe spilled fuel from the unit. Move 9 m away from 

refuelling site before starting engine.

 

Never attempt to burn off spilled fuel under any 

circumstances.

BASIC PRECAUTIONS IN THE CUTTING/WORK AREA

 

Do not stand on any unstable surface while using your 

chainsaw, that includes ladders, scaffolds, trees, etc.

 

Do not start cutting until you have a clear work area, 

secure footing, and a planned retreat path from the 

falling tree.

 

Do not cut from a ladder, this is extremely dangerous.

 

Use extreme caution when cutting small-size brush 

and saplings because slender material may catch the 

saw chain and be whipped toward you or pull you off 

balance.

 

When cutting a limb under tension, be alert for spring-

back so that you will not be struck when the tension in 

the wood fibres is released.

 

Do not operate a chainsaw in a tree unless you have 

been specifically trained to do so.

 

Beware of the emission of exhaust gases, lubricant 

mist and saw dust.

 

This product is very noisy when operating, to prevent 

long term hearing damage, wear hearing protection 

and keep other persons 15 m away from the work 

area. Operating similar tools nearby increases risk of 

injury. Take frequent breaks.

 

Use of hearing protection reduces the ability to hear 

warnings (shouts or alarms). The operator must pay 

extra attention to what is going on in the work area.

 

Keep bystanders and animals out of the work area. Do 

not allow other persons to be nearby during starting or 

cutting with the chainsaw.

NOTE:

 The size of the work area depends on the job being 

performed as well as the size of the tree or work piece 

involved. For example, felling a tree requires a larger work 

area than making other cuts, i.e., bucking cuts etc.

PUSH AND PULL

The reaction force is always opposite to the direction the 

chain is moving. Thus, the operator must be ready to 

control the pull when cutting on the bottom edge of the bar 

and the push when cutting along the top edge. 

NOTE:

 Your chainsaw has been fully factory tested. It is 

normal to find some slight lubricant residue on the saw.

MAINTENANCE PRECAUTIONS

 

Never operate a chainsaw that is damaged, improperly 

adjusted, or is not completely and securely assembled. 

 

Be sure that the saw chain stops moving when the 

throttle control trigger is released. If the saw chain 

moves at idling speed, the carburettor may need 

adjusting. Refer to “Operation-adjusting idling speed” 

later in this manual. If the saw chain still moves at 

idling speed after adjustment has been made, contact 

a service dealer for adjustment and discontinue use 

until the repair is made.

 

Keep the handles dry, clean, and free of lubricant or 

fuel mixture.

 

Follow the sharpening and maintenance instructions 

for the saw chain.

 

Use only the replacement guide bars and low kickback 

chains specified for your saw. You must never modify 

or remove parts from this product or use parts not 

recommended by Ryobi. This will increase the risk of 

injury.

 WARNING

The risk of kickback may increase if non-approved 

guide bar and chain combinations are used. Refer to  

specifications table for qualified replacement guide bar 

and chain combinations.

 WARNING

All chainsaw service, other than the items in the 

operator’s manual maintenance instructions, should be 

performed by competent chainsaw service personnel. 

If  improper  tools  are  used  to  remove  the  flywheel  or 

clutch, or if an improper tool is used to hold the flywheel 

in order to remove the clutch, structural damage to the 

flywheel could occur which could subsequently cause 

the flywheel to burst and serious injury could result.

Summary of Contents for RCS4640N

Page 1: ...RCS4640N PETROL CHAINSAW Important It is essential that you read the instructions in this manual before assembling maintaining and operating this machine...

Page 2: ...assembled Be sure that the saw chain stops moving when the throttle control trigger is released GENERAL PRECAUTIONS Know your tool Read the operator s manual carefully Learn the saw s applications an...

Page 3: ...g protection reduces the ability to hear warnings shouts or alarms The operator must pay extra attention to what is going on in the work area Keep bystanders and animals out of the work area Do not al...

Page 4: ...Symptoms include episodic blanching of fingers in response to cold numbness and tingling In extreme cases it will cause loss of touch sensation Anti vibration system does not guarantee that you will...

Page 5: ...and bar lubricant to the chain and bar oil reservoir every time you add fuel to the chain saw fuel tank Mix fuel outdoors where there are no sparkles or flames Do not smoke when mixing fuel or filling...

Page 6: ...ngth 375 mm Chain pitch 8 26 mm 0 325 Chain gauge 1 27 mm 0 05 Chain type 0 325 low profile full complement Drive sprocket 7 teeth x 0 325 Engine displacement 46 cm3 Maximum engine power ISO 7293 1 8...

Page 7: ...WARNING Kick back occurs when the moving chain contacts an object at the upper portion of the tip of the guide bar or when the wood closes in and pinches the saw chain in the cut Contact at the upper...

Page 8: ...nt only Mix 2 lubricant into the petrol This is a 50 1 ratio Mix the fuel thoroughly and also each time before refuelling Mix in small quantities Do not mix quantities larger than usable in a 30 day p...

Page 9: ...t do not attempt to start in the full choke position skip step 5 Push and release primer bulb 10 times Pull the choke out and push it back to the original run position STOPPING THE ENGINE See figure 1...

Page 10: ...trigger as soon as the cut is completed allowing the engine to idle Running the saw at full throttle without a cutting load may result in unnecessary wear to the chain bar and engine 7 Do not put pres...

Page 11: ...quipment Do not cut down trees having an extreme lean or large trees with rotten or dead limbs loose bark or hollow trunks Have these trees pushed or dragged down with heavy equipment then cut them up...

Page 12: ...operations stand on the uphill side so that the cut off section of the log cannot roll over you Sometimes it is impossible to avoid pinching with just standard cutting techniques or difficult to predi...

Page 13: ...he cutters should face in the direction of chain rotation If they face backwards turn the loop over 7 Place the chain drive links into the bar groove 8 Position the chain so there is a loop at the bac...

Page 14: ...e A Too low increases the potential for kick back Not low enough decreases cutting ability If the cutter teeth hit hard objects such as nails and stones or are abraded by mud or sand on the wood have...

Page 15: ...any of the following faults should be replaced Wear inside the bar rails which permits the chain to lie over sideways Bent guide bar Cracked or broken rails Spread rails In addition lubricate guide b...

Page 16: ...will seriously damage the engine WARNING Silencer surfaces are very hot during and after operation of the chainsaw Keep all body parts away from the silencer Serious burns may occur if contact is made...

Page 17: ...or damaged parts Before each use For loose fasteners Before each use For loose parts Before each use Chain brake function Before each use For fuel leaks Before each use Inspect and Clean Bar Before ea...

Page 18: ...carburettor adjustment Engine starts but will not run properly at high speed Carburettor requires H High jet adjustment Contact a service dealer for carburettor adjustment Engine does not reach full s...

Page 19: ...cant is on the guide bar contact a service dealer Bar and chain running hot and smoking Chain brake engaged Release chain brake refer to Operation operating chain brake earlier in this manual Chain te...

Page 20: ...tronic Industries Australia Pty Ltd Level 1 660 Doncaster Road Doncaster VIC 3108 Australia Techtronic Industries New Zealand Ltd 18 26 Amelia Earhart Avenue Mangere Auckland 2022 New Zealand 96099401...

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