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English (Original Instructions)

PROPER CLOTHING FOR SAFETY

 

Clothing must be sturdy and snug-fitting but allow 

complete freedom of movement. Always wear long 

pants made of heavy material to help protect your legs 

from contact with branches and brush. To reduce 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.

 

Always wear safety boots with a good tread (with non-

slip soles). 

 

Wear non-slip, heavy duty saw protective gloves. 

 

Always wear eye protection with side shields marked to 

comply with EN 166 as well as hearing and approved 

head protection when operating this equipment.

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. This should be done by 

trained users.

 

Do not operate a chainsaw in a tree.

 

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 Ryobi 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 technical specifications for 

qualified replacement guide bar and chain 

combinations.

Summary of Contents for RCS4235B Type III

Page 1: ...CHAINSAW ORIGINAL INSTRUCTIONS Important It is essential that you read the instructions in this manual before assembling maintaining and operating this machine RCS4235B Type III RCS4240B Type III...

Page 2: ...w your saw works Do not operate a chainsaw that is damaged improperly adjusted or not completely and securely assembled Be sure that the saw chain stops moving when the throttle control trigger is rel...

Page 3: ...chainsaw in a tree 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 o...

Page 4: ...height Follow the manufacturer s sharpening and maintenance instructions for the saw chain Use only replacement bars and chains specified by the manufacturer or the equivalent NOTE Refer to Operation...

Page 5: ...ch 14 Ignition switch in the run position Figure 11 13 Primer bulb Figure 12 15 Choke lever 21 Start position 22 Run position Figure 13 2 Trigger release 3 Throttle trigger Figure 14 14 Ignition switc...

Page 6: ...tate clutch cover knob clockwise to secure 12 Clutch cover lock knob 11 Chain tensioning dial Figure 44 65 Loosen chain 66 Tighten chain Figure 46 67 Raker depth gauge clearance Figure 47 68 Inspect d...

Page 7: ...ating this equipment No smoking sparks or open flame Hold and operate the saw properly with both hands Do not operate the saw using only one hand Engines produce carbon monoxide which is an odorless d...

Page 8: ...eaded petrol intended for motor vehicle use with an octane rating of 91 R M 2 or higher Use 2 stroke oil for air cooled engines Mix the fuel mix thoroughly and also each time before refueling Turn ign...

Page 9: ...ar Rotation direction to loosen the guide bar The following signal words and meanings are intended to explain the levels of risk associated with this product SYMBOLS SIGNAL MEANING DANGER Indicates an...

Page 10: ...ndle located at or toward the front of the chain saw This handle is for the left hand Guide Bar A solid railed structure that supports and guides the saw chain Kickback The backward or upward motion o...

Page 11: ...0 05 inch Chain type 3 8 low profile full complement 3 8 low profile full complement Drive sprocket 6 teeth x 3 8 6 teeth x 3 8 Engine displacement 42 cm3 42 cm3 Maximum engine power ISO 7293 1 7 kW...

Page 12: ...h Oregon saw chain Model name RCS4235B Type III RCS4240B Type III Guide bar no silkscreen Carlton part number 14 10W N1 MHC 16 10W N156 MHC Chain Carlton part number N1C BL 52E N1C BL 56E Guide bar no...

Page 13: ...ain is very sharp Always wear protective gloves when performing maintenance on the chain n Stop the engine before setting the chain tension n Slightly loosen the clutch cover lock knob by pressing in...

Page 14: ...as knowledge of the project you are attempting Before use of this product familiarise yourself with all operating features and safety rules Bumper Spike The integral bumper spike see figure 1 may be u...

Page 15: ...s normal for the engine to emit smoke during and after the first use ADDING BAR AND CHAIN LUBRICANT See Figure 6 Use RYOBI Bar and Chain Lubricant It is designed for chains and chain oilers and is for...

Page 16: ...led all the way out to the START position the throttle is set for starting To reset the throttle to the RUN position squeeze and then release the throttle trigger To start a cold engine n Turn ignitio...

Page 17: ...learly BASIC OPERATING CUTTING PROCEDURES It is strongly suggested that you seek professional training in the safety and use of this tool Practice cutting a few small logs on a saw horse or cradle usi...

Page 18: ...all logs on a saw horse or another log while bucking n 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 Kick...

Page 19: ...stic parts Chemicals can damage weaken or destroy plastic which may result in serious personal injury LUBRICATION All of the bearings in this product are lubricated with a sufficient amount of high gr...

Page 20: ...re abraded by mud or sand on the wood have an authorised service centre sharpen the chain NOTE Inspect the drive sprocket for wear or damage when replacing the chain If signs of wear or damage are pre...

Page 21: ...rom impurities CLEANING THE AIR FILTER See Figures 58 59 n Activate the chain brake n Remove the two screws holding the Engine cover n Lift the front of the Engine cover past chain brake lever n Lift...

Page 22: ...6 This engine uses a Champion RCJ4 or RCJ6Y or NGK BPMR7A with 025 in electrode gap Use an exact replacement and replace every 50 hours or more frequently if necessary n Remove the spark plug lead by...

Page 23: ...Squeeze primer bulb several times to purge fuel from carburettor n Drain all bar and chain lubricant from tank into a container approved for lubricant n Always place the scabbard over the guide bar an...

Page 24: ...res L Low Jet adjustment Contact an authorised service centre for carburettor adjustment Engine starts but will not run properly at high speed Carburettor requires H High jet adjustment Contact an aut...

Page 25: ...may be dull or bar may be damaged If no lubricant is present contact an authorised service centre Engine starts and runs but chain is not rotating Chain brake is engaged Release chain brake Refer to...

Page 26: ...trade mark serial number markings have been defaced altered or removed any damage caused by non observance of the instruction manual any non CE product any product which has been attempted to be repai...

Page 27: ...tell Limited London Road Nottingham NG2 3HW Phone 0115 986 2161 Email service hentonandchattell com Garden Machines Northampton 66 70 Kingsthorpe Road NN2 6HD Northampton Phone 01604 716222 Email jack...

Page 28: ...006 42 EC is in conformity with the provisions of the following other EC Directives EMC Directive 2004 108 EC Noise Emission Directive 2000 14 EC amended by 2005 88 EC and Gas Emission Directive 97 68...

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