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9

English (Original Instructions)

GLOSSARY OF TERMS

Skating

When the chain saw fails to dig in during a cut, the guide 

bar can begin hopping or dangerously skidding along the 

surface of the log or branch, possibly resulting in the loss of 

control of the chain saw. The sideward motion of the guide 

bar can increase the risk of kickback. To prevent or reduce 

this skating, hold the chain saw with two hands and make 

sure the saw chain establishes a groove for cutting.

Bucking

The process of cross cutting a felled tree or log into 

lengths.

Bouncing

Never cut small, flexible branches or brush with your chain 

saw. Their size and flexibility can easily cause the saw to 

bounce toward you or bind up with enough force to cause 

a kickback. The best tools for that kind of work are a hand 

saw, pruning shears, an axe and other hand tools.

Chain Brake

A device used to stop the saw chain.

Chain Saw Powerhead

A chain saw without the saw chain and guide bar.

Clutch

A mechanism for connecting and disconnecting a driven 

member to and from a rotating source of power.

Drive Sprocket or Sprocket

The toothed part that drives the saw chain.

Felling

The process of cutting down a tree.

Felling Back Cut

The final cut in a tree felling operation made on the 

opposite side of the tree from the notching undercut.

Front Hand Guard

A structural barrier between the front handle of a chain 

saw and the guide bar, typically located close to the hand 

position on the front handle, and sometimes employed as 

an activating lever for a chain brake.

Front Handle

The support handle 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, or both, of the guide bar 

occurring when the saw chain near the nose of the top 

area of the guide bar contacts any object such as a log or 

branch, or when the wood closes in and pinches the saw 

chain in the cut.

Kickback (Pinch)

The rapid pushback of the saw which can occur when the 

wood closes in and pinches the moving saw chain in the 

cut along the top of the guide bar.

Kickback (Rotational)

The rapid upward and backward motion of the saw which 

can occur when the moving saw chain near the upper 

portion of the tip of the guide bar contacts an object, such 

as a log or branch.

Low-Kickback Chain

A chain that complies with the kickback performance 

requirements of ISO 9518 when tested on a 

representative sample of chain saws.

Normal Cutting Position

Those positions assumed in performing the bucking and 

felling cuts.

Notching Undercut

A notch cut in a tree that directs the tree’s fall.

Rear Handle

The support handle located at or toward the rear of the 

saw. It normally contains the throttle. This handle is for 

the right hand.

Reduced Kickback Guide Bar

A guide bar which has been demonstrated to reduce 

kickback significantly.

Replacement Saw Chain

A chain that complies with the kickback performance 

requirements of ISO 9518 when tested with specific chain saws. 

Saw Chain

A loop of chain having cutting teeth that cut the wood and that 

is driven by the motor and is supported by the guide bar.

Springpole

A small tree (sapling) or limb that is bent or trapped under 

tension. It may “spring back” rapidly when cut, causing a 

dangerous situation.

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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