Ryobi Chainsaw P540 User Guide

OPERATOR’S MANUAL  
18 VOLT cHAIN SAW  
P540  
P540A  
P540B  
AccEPTS ALL ONE+  
BATTERY PAcKS  
BATTERIES ANd cHARGERS  
SOLd SEPARATELY  
Your chain saw has been engineered and manufactured to our high standard for dependability, ease of operation, and  
operator safety. When properly cared for, it will give you years of rugged, trouble-free performance.  
WARNING: To reduce the risk of injury, the user must read and understand the operator's manual before using  
this product.  
Thank you for your purchase.  
SAVE THIS MANUAL FOR FUTURE REFERENcE  
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GENERAL SAFETY RULES  
Keep handles dry, clean, and free of oil and grease.  
WARNING:  
Do not operate a chain saw that is damaged, improperly  
adjusted,ornotcompletelyandsecurelyassembled.Chain  
should stop turning when the trigger is released. If the  
chain turns after the trigger has been released, have the  
unit serviced by your nearest Ryobi service dealer.  
Do not attempt to operate this unit until you have read  
thoroughly and understand completely all instructions,  
safety information, etc. contained in this manual. Failure  
to comply can result in accidents involving fire, electric  
shock, or serious personal injury.  
Checkfordamagedparts.Anypartorguardthathasbeen  
damaged should be carefully checked to determine that  
it will operate properly and perform its intended function.  
Check for alignment of moving parts, binding of moving  
parts, breakage of parts, mounting, and any other condi-  
tions that may affect its operation. A guard or other part  
that is damaged should be properly repaired or replaced  
byanauthorizedservicedealerunlessotherwiseindicated  
elsewhere in this manual.  
REAd ALL INSTRUcTIONS  
BASIc SAFETY PREcAUTIONS  
Do not operate a chain saw with one hand! Use a firm grip  
with thumbs and fingers encircling the chain saw handles.  
Serious injury to the operator, helpers, bystanders, or any  
combinationofthesepersonsmayresultfromone-handed  
operation. A chain saw is intended for two-handed use.  
All chain saw service, other than the items listed in the  
operationandmaintenancesections,shouldbeperformed  
by your nearest Ryobi service dealer.  
Always be aware of what you are doing when using the  
chain saw. Use common sense. Do not operate the chain  
saw when you are tired, ill, or under the influence of al-  
cohol, drugs, or medication.  
Do not use in the rain, snow or wet conditions.  
Always maintain a proper stance. Do not overreach.  
Do not adapt your powerhead to a bow guide or use it  
to power any attachments or devices not listed for the  
saw.  
Stay alert and pay attention to what you are doing. Use  
common sense when using this unit.  
Keep all parts of your body away from the saw chain  
Do not cut vines and/or small underbrush.  
when the unit is running.  
Always carry the chain saw by the front handle with the  
unit stopped and the guide bar and saw chain positioned  
to the rear. When transporting your chain saw, use the  
appropriate guide bar scabbard.  
SAFETY APPAREL  
Wearsnugfittingclothing.Alwayswearheavy,longpants,  
overalls, jeans or chaps made of cut resistant material or  
onesthatcontaincutresistantinserts.Wearnon-slipsafety  
footwear. Wear non-slip heavy duty gloves to improve  
your grip and to protect your hands. Do not wear jewelry,  
short pants, sandals, or go barefoot. Do not wear loose  
fitting clothing, which could be drawn into the motor or  
catch the chain or underbrush. Secure hair so it is above  
shoulder level.  
Neverletanyoneuseyourchainsawwhohasnotreceived  
adequate instructions in its proper use. This applies to  
rentals as well as privately owned saws.  
Before you start the unit, make sure the saw chain is not  
contacting any object.  
Stop the chain saw before setting it down. Do not leave  
the unit running unattended.  
WeareyeprotectionwhichismarkedtocomplywithANSI  
Z87.1 as well as hearing and head protection when oper-  
ating this equipment.  
Toavoidaccidentalstarting, nevercarrytheunitwithyour  
finger on the trigger.  
Maintain the unit with care. Keep the cutting edge sharp  
and clean for best performance and to reduce the risk  
of injury. Follow instructions for lubricating and changing  
accessories. Inspect the battery charger cord periodi-  
cally, and if damaged, have it replaced or repaired by an  
authorized service dealer.  
3
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GENERAL SAFETY RULES  
KIcKBAcK  
See Figures 1 - 2.  
ROTATIONAL  
KICKBACK  
WARNING: Kickback may occur 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 portion of the  
tip of the guide bar can cause the chain to dig into the  
object and stop the chain for an instant. The result is  
a lightning fast, reverse reaction which kicks the guide  
bar up and back toward the operator. If the saw chain  
is pinched along the top of the guide bar, the guide bar  
can be driven rapidly back toward the operator. Either of  
these reactions can cause loss of saw control which can  
result in serious injury. Do not rely exclusively upon the  
safety devices built into the saw. As a chain saw user,  
you should take several steps to keep your cutting jobs  
free from accident or injury.  
BAR shOwN wIThOuT sAfE-T-TIp® NOsE GuARD fOR  
ILLusTRATION puRpOsEs ONLy.  
Fig. 1  
Thefollowingprecautionsshould befollowed tomini-  
KICKBACK  
DANGER ZONE  
mize kickback:  
1. Always grip the saw firmly with both hands. Hold the  
saw firmly with both hands when the unit is running.  
Place your right hand on the rear handle and your left  
hand on the front handle with your thumbs and fingers  
encircling the chain saw handles. A firm grip together  
with a stiff left arm will help you maintain control of  
the saw if kickback occurs.  
Fig. ꢀ  
ꢀ. Make sure that the area in which you are cutting is free  
from obstructions. Do not let the nose of the guide bar  
contact a log, branch, fence, or any other obstruction  
that could be hit while you are operating the saw.  
3. Always cut with the unit running at full speed. Fully  
squeeze the throttle trigger and maintain a steady  
cutting speed.  
ꢁ. Use replacement parts such as low kickback chain,  
SAFE-T-TIP® anti-kickbacknoseguards, chainbrakes  
andspecialguidebarsthatreducetherisksassociated  
with rotational kickback.  
Useonlythereplacementguidebarsandlowkickback  
chains specified by the manufacturer for the saw.  
puLL  
With a basic understanding of kickback, you can reduce  
or eliminate the element of surprise. Sudden surprise  
contributes to accidents.  
Keep proper footing and balance at all times.  
Do not cut above shoulder height or overreach when cutting.  
Keep the SAFE-T-TIP® anti-kickback nose guard properly  
mounted on the guide bar to prevent rotational kickback.  
Follow the sharpening and maintenance instructions for  
the saw chain.  
Push and Pull - This reaction force is always opposite to  
the direction the chain is moving where wood contact is  
made. Thus, the operator must be ready to control the  
PULL when cutting on the bottom edge of the bar, and  
PUSH when cutting along the top edge. See Figure 3.  
push  
Fig. 3  
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GENERAL SAFETY RULES  
UNdERSTANdING YOUR cHAIN SAW SAFETY  
dEVIcES  
See Figure 4.  
IN THE cUTTING/WORK AREA  
Do not operate a chain saw in a tree, on a ladder, or scaf-  
fold; this is extremely dangerous.  
®
Keep ALL children, bystanders, visitors, and animals out  
of the work area while starting or cutting with the chain  
saw.  
SAFE-T-TIP Anti-Kickback Nose Guard  
The SAFE-T-TIP® prevents kickback from happening, be-  
cause it covers the tip of the bar where kickback is gener-  
ated. Never attempt any kind of cutting where the SAFE-T-  
TIP® would have to be removed from the bar tip.  
NOTE: The size of the work area depends on the job  
being performed as well as the size tree or work piece  
involved. For example, felling a tree requires a larger work  
area than making bucking cuts.  
LOW KIcKBAcK SAW cHAIN  
The rakers (depth gauges) ahead of each cutter can minimize  
the force of a kickback reaction by preventing the cutters  
from digging in too deeply at the kickback zone. Only use  
replacement chain that is equivalent to original chain or has  
been certified as low kickback chain per ANSI B175.1.  
Neverstartcuttinguntilyouhaveaclearworkarea,secure  
footing, and a planned retreat path from the falling tree.  
Cluttered area invite injuries.  
Do not expose the chain saw to rain.  
Do not use the chain saw in damp or wet locations.  
Low kickback saw chain is chain that has met the kickback  
performance requirements of ANSI B175.1 - 1991 (Amer-  
ican National Standard for Power Tools - Gasoline-Powered  
Chain Saws-Safety Requirements) when tested on the rep-  
resentative sample of chain saws below 3.8 c.i.d. specified  
in ANSI B175.1 - 1991.  
Do not use the chain saw near flammable liquids, gases,  
or in any type of explosive atmosphere.  
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 bal-  
ance.  
As saw chains are sharpened during their useful life, they  
lose some of the low kickback qualities and extra caution  
should be used.  
When cutting a limb that is under tension, be alert for  
spring back so that you will not be struck when the ten-  
sion in the wood fibers is released.  
GUIdE BARS  
Generally, guide bars with small radius tips have somewhat  
lower kickback potentials.  
Do not force the chain saw. The job can be performed  
better and safer at the rate for which it was intended.  
Always use the right product for your application. The  
chain saw should be used for cutting wood only. Never  
use the chain saw to cut plastic, masonry or non-wood  
building materials.  
When making a replacement, be sure to order one of the  
Ryobi bars listed for the saw in this operator's manual. The  
proper size SAFE-T-TIP® nose guard comes installed on the  
bar. Use only guide bars that have a provision for mounting  
the SAFE-T-TIP®.  
Do not use the chain saw for purposes not intended.  
Store idle chain saw when not in use. Chain saw should  
be stored in a dry and high or locked area out of the reach  
of children. When storing chain saw, remove battery and  
placethescabbardonthebarandchainorstorethechain  
saw in a carry case.  
sAfE-T-TIp®  
Remove the battery pack from the chain saw before  
cleaning, servicing, storing, removing material from the  
unit, changing accessories such as the bar and chain, or  
when not in use.  
Fig. ꢁ  
5
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SPEcIFIc SAFETY RULES  
explosion. Properly dispose of a dropped or damaged  
battery immediately.  
BATTERY SAFETY  
Battery operated units do not have to be plugged into an  
electrical outlet; therefore, they are always in operating  
condition. Be aware of possible hazards even when unit  
is not operating.  
Batteries can explode in the presence of a source of ig-  
nition, such as a pilot light. To reduce the risk of serious  
personal injury, never use any cordless product in the  
presence of open flame. An exploded battery pack can  
propel debris and chemicals. If exposed, flush with water  
immediately.  
Remove the battery pack from the chain saw before  
cleaning, servicing, storing, removing material from the  
unit, changing accessories such as the bar and chain, or  
when not in use.  
Do not charge unit in a damp or wet location. Following  
this rule will reduce the risk of electric shock.  
A battery pack must be recharged only with the speci-  
fied charger for the battery pack. A charger that may be  
suitable for one type of battery pack may create a risk  
of fire when used with another battery pack. Use battery  
pack only with charger listed.  
For best results, your battery unit should be charged in  
a location where the temperature is more than 50°F but  
less than 100°F. Do not store outside or in vehicles.  
Under extreme usage or temperature conditions, battery  
pack leakage may occur. If liquid comes in contact with  
your skin, wash immediately with soap and water, then  
neutralize with lemon juice or vinegar. If liquid gets into  
your eyes, flush them with clean water for at least 10  
minutes, then seek immediate medical attention.  
MOdEL  
BATTERY PAcK  
cHARGER (P113)  
(P104 Li-ion)  
130ꢁꢀ9001, 130ꢁꢀ900ꢀ  
130155001  
1ꢁ0501001  
1ꢁ0501005  
P5ꢁ0  
P5ꢁ0A  
P5ꢁ0B  
(P100 Ni-cd)  
130ꢀ5500ꢁ, 130ꢀꢀꢁ0ꢀ8  
Do not dispose of batteries in a fire. The cell may explode.  
Batteries should be recycled, consult your local waste  
authority for information regarding available recycling  
and/or disposal options.  
BATTERY PAcK  
cHARGER (P110)  
1ꢁꢀ3701, 1ꢁ0ꢀ370ꢀ1,  
1ꢁ0ꢀ370ꢀ3  
(P100 Ni-cd)  
130ꢀ5500ꢁ, 130ꢀꢀꢁ0ꢀ8  
When battery pack is not in use, keep it away from other  
metal objects like: paper clips, coins, keys, nails, screws,  
or other small metal objects that can make a connection  
from one terminal to another. Shorting the battery pack  
terminals together may cause sparks, burns, or a fire.  
To reduce the risk of explosion and possible injury, Do not  
place battery units or their batteries near fire or heat.  
Do not open or mutilate the battery pack. Released elec-  
trolyte is corrosive and may cause damage to the eyes  
or skin. It may be toxic if swallowed.  
Do not crush, drop or damage battery pack. Do not  
use a battery pack or charger that has been dropped or  
received a sharp blow. A damaged battery is subject to  
6
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SYMBOLS  
Some of the following symbols may be used on this product. Please study them and learn their meaning. Proper  
interpretation of these symbols will allow you to operate the product better and safer.  
SYMBOL  
NAME  
dESIGNATION/EXPLANATION  
V
A
Volts  
Voltage  
Current  
Amperes  
Hertz  
Hz  
W
Frequency (cycles per second)  
Watt  
Power  
min  
Minutes  
Time  
Alternating Current  
Direct Current  
Type of current  
Type or a characteristic of current  
n
o
No Load Speed  
Rotational speed, at no load  
Class II Construction  
Per Minute  
Double-insulated construction  
.../min  
Revolutions, strokes, surface speed, orbits etc., per minute  
Wet Conditions Alert  
Do not expose to rain or use in damp locations.  
To reduce the risk of injury, user must read and understand  
operator’s manual before using this product.  
Read The Operator’s Manual  
Wear eye protection which is marked to comply with ANSI Z87.1  
as well as hearing and head protection when operating this  
equipment.  
Wear Eye, Hearing, and  
Head Protection  
Safety Alert  
Precautions that involve your safety.  
The SAFE-T-TIP nose guard on the guide bar helps prevent  
kickback.  
SAFE-T-TIP Nose Guard  
Operate With Two Hands  
One Handed  
Hold and operate the saw properly with both hands.  
Do not operate the saw using only one hand.  
DANGER! Beware of kickback.  
Kickback  
Bar Nose Contact  
Avoid bar nose contact.  
Wear non-slip, heavy-duty protective gloves when handling the  
chain saw.  
Wear Gloves  
Wear Safety Footwear  
Keep Bystanders Away  
Wear non-slip safety footwear when using this equipment.  
Keep all bystanders and animals at least 50 ft. away.  
7
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SYMBOLS  
The following signal words and meanings are intended to explain the levels of risk associated with this product.  
SYMBOL  
SIGNAL  
MEANING  
dANGER:  
Indicates an imminently hazardous situation, which, if not avoided, will  
result in death or serious injury.  
WARNING:  
Indicates a potentially hazardous situation, which, if not avoided, could  
result in death or serious injury.  
cAUTION:  
cAUTION:  
Indicates a potentially hazardous situation, which, if not avoided, may  
result in minor or moderate injury.  
(Without Safety Alert Symbol) Indicates a situation that may result in  
property damage.  
SERVIcE  
Servicing requires extreme care and knowledge and should  
be performed only by a qualified service technician. For  
service we suggest you return the product to your nearest  
AUTHORIZEd SERVIcE cENTER for repair. When servic-  
ing, use only identical replacement parts.  
WARNING:  
To avoid serious personal injury, do not attempt to use this  
product until you read thoroughly and understand com-  
pletely the operator’s manual. If you do not understand  
the warnings and instructions in the operator’s manual,  
do not use this product. Call Ryobi customer service for  
assistance.  
WARNING:  
The operation of any power tool can result in foreign objects being thrown into your eyes, which can  
result in severe eye damage. Before beginning power tool operation, always wear safety goggles,  
safety glasses with side shields, or a full face shield when needed. We recommend Wide Vision Safety  
Mask for use over eyeglasses or standard safety glasses with side shields. Always use eye protection  
which is marked to comply with ANSI Z87.1.  
SAVE THESE INSTRUcTIONS  
8
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FEATURES  
PROdUcT SPEcIFIcATIONS  
Motor......................................................................................................................................................................18 Volt DC  
Bar Length......................................................................................................................................................................10 in.  
Replacement Bar Part Number ......................................................................................................671ꢀ5600ꢀ or 67183ꢁ007  
Replacement Chain Part Number ......................................................................................................6958301 or 69058300ꢀ  
NOTE: This saw was designed for occasional light duty use and has some limitations as to what it can cut.  
sCABBARD  
ChAIN OIL  
TANK CAp  
REAR  
hANDLE  
BAR  
sAfE-T-TIp®  
ChAIN  
BATTERy pACK  
(NOT INCLuDED)  
fRONT hANDLE  
hAND GuARD  
TRIGGER RELEAsE  
BuTTON  
BATTERy pACK  
(NOT INCLuDED)  
hEX KEy  
hEX KEy  
sTORAGE AREA  
TRIGGER  
Fig. 5  
9
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ASSEMBLY  
UNPAcKING  
This product has been shipped completely assembled.  
WARNING:  
If any parts are damaged or missing do not operate this  
product until the parts are replaced. Failure to heed this  
warning could result in serious personal injury.  
Carefully remove the product and any accessories from  
the box. Make sure that all items listed in the packing list  
are included.  
Inspect the product carefully to make sure no breakage  
or damage occurred during shipping.  
WARNING:  
Do not discard the packing material until you have care-  
Do not attempt to modify this product or create acces-  
sories not recommended for use with this product. Any  
such alteration or modification is misuse and could result  
in a hazardous condition leading to possible serious  
personal injury.  
fully inspected and satisfactorily operated the product.  
If any parts are damaged or missing, please call  
1-800-860-50ꢁ0 for assistance.  
PAcKING LIST  
Chain Saw with Scabbard  
Wrench  
WARNING:  
Bar and Chain Lubricant  
Operator’s Manual  
To prevent accidental starting that could cause serious  
personal injury, always remove the battery pack from the  
product when assembling parts.  
OPERATION  
WARNING:  
WARNING:  
Do not use any attachments or accessories not recom-  
mended by the manufacturer of this product. The use of  
attachments or accessories not recommended can result  
in serious personal injury.  
Do not allow familiarity with this product to make you  
careless. Remember that a careless fraction of a second is  
sufficient to inflict serious injury.  
WARNING:  
APPLIcATIONS  
You may use this product for the following purposes:  
Limbing and pruning branches from trees  
Felling small trees up to 5 in. diameter  
Bucking the fallen tree into shorter lengths  
Always wear safety goggles or safety glasses with side  
shields when operating power tools. Failure to do so  
could result in objects being thrown into your eyes result-  
ing in possible serious injury.  
10  
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OPERATION  
This product will accept Ryobi One+ 18 V lithium-ion  
battery packs and Ryobi One+ 18 V nickel-cadmium battery  
packs.  
cHAIN OIL SYSTEM  
See Figure 7.  
Use Ryobi Bar and Chain Lubricant. It is formulated to  
perform over a wide temperature range with no dilution  
required.  
For complete charging instructions, refer to the Operator’s  
Manual for the battery packs and chargers listed in the  
General Safety Rules.  
NOTE: Do not use dirty, used or otherwise contaminated  
oils. Damage may occur to the bar or chain.  
TO INSTALL BATTERY PAcK  
See Figure 6.  
Carefully pour the bar and chain oil into the tank.  
Check and fill the oil tank when battery is recharged, or  
Place the battery pack in your chain saw. Align raised  
rib on battery pack with groove in chain saw’s battery  
port.  
as needed.  
Depress the oil tank cap several times to pump the oil to  
the chain before starting the saw.  
Make sure the latches on each side of the battery pack  
snap in place and that battery pack is secured in chain  
saw before beginning operation.  
Depress the oil tank cap every ꢀ0-30 seconds while cut-  
ting to keep the chain lubricated.  
NOTE: It is normal for oil to seep from the saw when not  
in use. To prevent seepage, empty the oil tank after each  
use. When storing the unit for a long period of time (three  
months or longer) be sure the chain is lightly lubricated; this  
will prevent rust on the chain and bar sprocket.  
TO REMOVE BATTERY PAcK  
See Figure 6.  
Locate latches on side of battery pack and depress both  
sides to release the battery pack from the chain saw.  
cAUTION:  
When placing battery pack in your chain saw, be sure  
raised rib on battery pack aligns with groove in chain  
saw's battery port and latches snap in place properly.  
Improper assembly of battery pack can cause damage  
to internal components.  
cAUTION:  
BATTERy  
pORT  
Remove battery pack from unit. Fill oil tank with Ryobi  
Bar and Chain Lubricant before starting the chain saw.  
Failure to lubricate the chain will cause damage to the  
bar and chain.  
BATTERy  
pACK  
LATChEs  
Fig. 6  
Fig. 7  
11  
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OPERATION  
STARTING ANd STOPPING THE cHAIN SAW  
See Figure 8.  
WARNING:  
Keep body to the left of the chain line. Never straddle  
the saw or chain, or lean over past the chain line.  
Starting the chain saw:  
Place the chain saw on a flat bare surface and make sure  
no objects or obstructions are in immediate vicinity which  
could come in contact with the bar and chain.  
TRIGGER RELEAsE  
BuTTON  
Press and hold the trigger release button. This makes the  
trigger operational.  
Press and hold the trigger, release the trigger release  
button and continue to squeeze the trigger for continued  
operation.  
TRIGGER  
Stopping the chain saw:  
Release the trigger to stop the chain saw.  
TRIGGER RELEAsE  
BuTTON  
Upon release of the trigger, the trigger release button will  
be automatically reset to the lock position.  
This cordless chain saw is not designed for cutting trees  
larger than 5 in. in diameter.  
This cordless chain saw is designed for limbing and pruning  
type cutting, as well as cutting trees up to 5 in. in diameter  
only.  
Do not attempt to make any cut that would require removal  
of the SAFE-T-TIP®.  
PREPARATION FOR cUTTING  
PROPER GRIP ON HANdLES  
See Figures 9 - 11.  
TRIGGER  
Fig. 8  
Refer to Important SaFety InStructIonS earlier in  
this manual for appropriate safety equipment.  
Wear non-slip gloves for maximum grip and protection.  
Hold the saw firmly with both hands. Always keep your  
left hand on the front handle and your right hand on the  
rear handle so that your body is to the left of the chain  
line.  
1ꢀ  
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OPERATION  
WARNING:  
Never use a left-handed (cross-handed) grip, or any  
stance which would place your body or arm across the  
chain line.  
Maintain a proper grip on the saw whenever the unit is  
running. The fingers should encircle the handle and the  
thumb is wrapped under the handlebar. This grip is least  
likelytobebroken(byakickbackorothersuddenreaction  
of the saw). Any grip in which the thumb and fingers are  
on the same side of the handle, is dangerous because a  
slight kick of the saw can cause loss of control.  
Fig. 9  
WARNING:  
Do not operate the throttle trigger with your left hand  
and hold the front handle with your right hand. Never  
allow any part of your body to be in the chain line while  
operating a saw.  
Fig. 10  
ChAIN LINE  
Fig. 11  
13  
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OPERATION  
PROPER cUTTING STANcE  
See Figure 12.  
Weight should be balanced with both feet on solid  
ChAIN LINE  
ground.  
Keep left arm with elbow locked in a "straight arm" posi-  
sTRAIGhT ARM  
pOsITION  
tion to withstand any kickback force.  
Your body should always be to the left of the chain line.  
Thumb should be on underside of handlebar.  
BASIc cUTTING PROcEdURE  
Practice cutting a few small logs using the following tech-  
nique to get the "feel" of using the saw before you begin a  
major sawing operation.  
Fig. 1ꢀ  
Take the proper stance in front of the wood with the saw  
off.  
Always cut with both feet on solid ground to prevent be-  
Squeeze the trigger and let the chain accelerate to full  
ing pulled off balance.  
speed before entering the cut.  
Do not cut above chest height, as a saw held higher is  
Begin cutting with the saw against the log.  
difficult to control against kickback forces.  
Keep the unit running the entire time you are cutting,  
Do not fell trees near electrical wires or buildings. Leave  
maintain a steady speed.  
this operation for professionals.  
Allow the chain to cut for you; exert only light downward  
pressure. If you force the cut, damage to the bar, chain,  
or unit can result.  
Cut only when visibility and light are adequate for you to  
see clearly.  
Release the trigger as soon as the cut is completed, al-  
lowing the chain to stop. If you run the saw without a  
cutting load, unnecessary wear can occur to the chain,  
bar, and unit.  
TREE FELLING  
Unusual Hazardous Tree Felling conditions  
Do not fell trees during periods of high wind or heavy precipi-  
tation. Wait to do your cutting until the hazard has ended.  
Do not put pressure on the saw at the end of the cut.  
WORK AREA PREcAUTIONS  
Cut only wood or materials made from wood, no sheet  
metal, no plastics, no masonry, no non-wood building  
materials.  
WARNING:  
Do not cut down trees having an extreme lean or large  
trees that have rotten limbs, loose bark, or hollow trunks.  
Have these trees pushed or dragged down with heavy  
equipment, then cut them up.  
Never allow children to operate the saw. Allow no person  
to use this chain saw who has not read this Operator's  
Manual or received adequate instructions for the safe  
and proper use of this chain saw.  
WARNING:  
Do not cut trees near electrical wires or buildings.  
When felling a tree, keep everyone - helpers, bystanders,  
children, and animals - a safe distance from the cutting  
area. During felling operations, the safe distance should  
be a least twice the height of the largest trees in the felling  
area.Duringbuckingoperations,keepaminimumdistance  
of 15 feet (ꢁ.5 m) between workers.Trees should not be  
felled in a manner that would endanger any person, strike  
any utility line or cause any property damage. If the tree  
doesmakecontactwithanyutilityline,theutilitycompany  
should be notified immediately.  
WARNING:  
Check the tree for damaged or dead branches that could  
fall and hit you during felling.  
1ꢁ  
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OPERATION  
pLANNED LINE Of fALL  
WARNING:  
Periodically glance at the top of the tree during the  
backcut to assure the tree is going to fall in the desired  
direction.  
WARNING:  
If the tree starts to fall in the wrong direction, or if the  
saw gets caught or hung up during the fall, leave the saw  
and save yourself!  
Felling a tree - When bucking and felling operations are  
being performed by two or more persons, at the same  
time, the felling operation should be separated from the  
bucking operation by a distance of at least twice the  
height of the tree being felled. Trees should not be felled  
in a manner that would endanger any person, strike any  
utility line or cause any property damage. If the tree does  
make contact with any utility line, the utility company  
should be notified immediately.  
90°  
sAfE  
RETREAT  
ZONE  
pLANNED pATh Of sAfE RETREAT 135° fROM pLANNED LINE  
Of fALL  
Before any cuts are started, pick your escape route (or  
routes in case the intended route is blocked); clear the  
immediate area around the tree and make sure there are  
noobstructionsinyourplannedpathofretreat.Clearpath  
of safe retreat approximately 135° from planned line of  
fall. The retreat path should extend back and diagonally  
to the rear of the expected line of fall. See Figure 13.  
sAfE  
RETREAT  
ZONE  
135°  
pLANNED  
LINE Of fALL  
45°  
45°  
90°  
Before felling is started, consider the force and direction  
of the wind, the lean and balance of the tree, and the lo-  
cation of large limbs. These things influence the direction  
in which the tree will fall. Do not try to fell a tree along a  
line different from its natural line of fall.  
135°  
sAfE  
RETREAT  
ZONE  
The chain saw operator should keep on the uphill side  
of the terrain as the tree is likely to roll or slide downhill  
after it is felled.  
Fig. 13  
Remove dirt, stones, loose bark, nails, staples, and wire  
from the tree where felling cuts are to be made.  
Notched Undercut. Cut a notch about 1/3 the diameter  
of the tree, perpendicular to the direction of fall. Make the  
cuts of the notch so they intersect at a right angle to the  
line of fall. This notch should be cleaned out to leave a  
straight line. To keep the weight of the wood off the saw,  
always make the lower cut of the notch before the upper  
cut. See Figure 14.  
hINGE  
2 in. OR 1/10 DIA  
NOTCh -  
AppROX. 1/3  
DIAMETER Of  
TRuNK  
BACK CuT  
2 in.  
Fig. 1ꢁ  
15  
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OPERATION  
Felling Backcut. The backcut is always made level and  
Sometimes it is impossible to avoid pinching (with just  
standard cutting techniques) or difficult to predict which  
way a log will settle when cut. To avoid pinching while  
cutting, rotate or move the log so that the pinch is elimi-  
nated.  
horizontal, and at a minimum of ꢀ in. above the horizontal  
cut of the notch. See Figures 14 - 15.  
Never cut through to the notch. Always leave a band of  
wood between the notch and backcut (approximately  
ꢀ in. or 1/10 the diameter of the tree). This is called  
"hinge" or “hingewood.” It controls the fall of the tree  
and prevents slipping or twisting or shoot-back of the  
tree off the stump. See Figures 14 - 15.  
On large diameter trees, stop the back cut before it is  
deep enough for the tree to either fall or settle back on  
the stump. Then insert soft wooden or plastic wedges  
into the cut so they do not touch the chain. The wedges  
can be driven in, little by little, to help jack the tree over.  
See Figure 16.  
NOTCh  
BACK CuT  
NOTE: When bucking or felling with a wedge, it may  
be necessary to remove the SAFE-T-TIP® anti-kickback  
device to allow the bar to be drawn through the cut.  
After the cut is complete, the tip should be reinstalled  
immediately.  
hINGE  
Fig. 15  
As tree starts to fall, stop the chain saw and put it down  
immediately. Retreat along the cleared path, but watch  
the action in case something falls your way. Be alert for  
overhead limbs or branches that may fall and watch your  
footing.  
WARNING:  
Never cut through to the notch when making a backcut.  
The hinge controls the fall of the tree, this is the section  
of wood between the notch and backcut.  
wEDGE  
Fig. 16  
KICKBACK  
BUcKING  
See Figures 17 - 20.  
Bucking is the term used for cutting a fallen tree to the de-  
sired log length.  
Always make sure your footing is secure and your weight  
is distributed evenly on both feet.  
Cut only one log at a time.  
Support small logs on a saw horse or another log while  
Fig. 17  
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. To avoid the danger, keep the SAFE-  
T-TIP® anti-kickbackdeviceattachedwhilecutting.Referto  
Precautions Against Kickback earlier in this manual.  
When bucking on a slope, always stand on the uphill side  
of the log. To maintain complete control of the chain saw  
when cutting through the log, release the cutting pressure  
near the end of the cut without relaxing your grip on the  
chainsawhandles.Donotletthechaincontacttheground.  
After completing the cut, wait for the saw chain to stop  
before you move the chain saw. Always stop the motor  
before moving from tree to tree.  
Fig. 18  
16  
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OPERATION  
BUcKING LOGS UNdER STRESS  
LOG suppORTED AT ONE END:  
LOAD  
See Figures 19 - 20.  
When the log is supported along its entire length, it should  
be cut from the top or overbucking.  
fINIshING CuT  
When the log is supported on one end, cut 1/3 the diameter  
from the underside or underbucking. Then make the finishing  
cut by overbucking to meet the first cut.  
As the log is being cut, it will tend to bend. The saw can  
become pinched or hung in the log if you make the first cut  
deeper than 1/3 of the diameter of the log.  
1sT CuT  
1/3 DIA  
Give special attention to logs under stress to prevent the  
bar and chain from pinching.  
When bucking on a slope, always stand on the uphill side  
of the log as shown in figure 18. When “cutting through,”  
to maintain complete control of the chain saw, release the  
cutting pressure near the end of the cut without relaxing your  
grip on the chain saw handles. Do not let the chain contact  
the ground. After completing the cut, wait for the saw chain  
to stop before you move the chain saw. Always stop the  
motor before moving from tree to tree.  
LOG suppORTED AT BOTh ENDs:  
LOAD  
1sT CuT 1/3 DIA  
TYPES OF cUTTING USEd  
See Figure 20.  
OVERBUcKING  
Begin on the top side of the log with the bottom of the saw  
against the log; exert light pressure downward. Note that  
the saw will tend to pull away from you.  
fINIshING CuT  
OvERBuCKING  
Fig. 19  
UNdERBUcKING  
Begin on the under side of the log with the top of the saw  
against the log; exert light pressure upward. During under-  
bucking, the saw will tend to push back at you. Be pre-  
pared for this reaction and hold the saw firmly to maintain  
control.  
WARNING:  
Never climb into a tree to limb or prune. Do not stand on  
ladders, platforms, a log, or in any position which can  
cause you to lose your balance or control of the saw.  
uNDERBuCKING  
Fig. ꢀ0  
17  
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OPERATION  
LIMBING  
See Figure 21.  
3
2
Limbing is removing branches from a fallen tree.  
1
Work slowly, keeping both hands on the chain saw with  
a firm grip. Always make sure your footing is secure and  
your weight is distributed evenly on both feet.  
Leave the larger support limbs under the tree to keep the  
tree off the ground while cutting.  
4
Limbs should be cut one at a time. Remove the cut limbs  
from the work area often to help keep the work area clean  
and safe.  
CuT LIMBs ONE AT A TIME AND LEAvE suppORT LIMBs  
uNDER TREE uNTIL LOG Is CuT  
Fig. ꢀ1  
Branches under tension should be cut from the bottom  
up to avoid binding the chain saw.  
sECOND CuT  
Keep the tree between you and the chain saw while limb-  
ing. Cut from the side of the tree opposite the branch you  
are cutting.  
LOAD  
PRUNING  
See Figure 22.  
Pruning is trimming limbs from a live tree.  
Work slowly, keeping both hands on the chain saw with  
a firm grip. Always make sure your footing is secure and  
your weight is distributed evenly on both feet.  
fIRsT CuT  
1/3 DIAMETER  
Do not cut from a ladder, this is extremely dangerous.  
Leave this operation for professionals.  
fINIshING CuT  
Do not cut above chest height as a saw held higher is  
Fig. ꢀꢀ  
difficult to control against kickback.  
Whenpruningtreesitisimportantnottomakethefinishing  
cut next to the main limb or trunk until you have cut off  
the limb further out to reduce the weight. This prevents  
stripping the bark from the main member.  
spRINGpOLE  
Underbuck the branch 1/3 through for your first cut.  
Your second cut should overbuck to drop the branch  
off.  
Now make your finishing cut smoothly and neatly against  
the main member so the bark will grow back to seal the  
wound.  
Fig. ꢀ3  
WARNING:  
WARNING:  
If the limbs to be pruned are above chest height, hire a  
professional to perform the pruning.  
Springpolesaredangerousandcouldstriketheoperator,  
causingtheoperatortolosecontrolofthechainsaw.This  
could result in severe or fatal injury to the operator.  
SPRINGPOLES  
See Figure 23.  
A springpole is any log, branch, rooted stump, or sapling  
which is bent under tension by other wood so that it springs  
back if the wood holding it is cut or removed. On a fallen  
tree, a rooted stump has a high potential of springing back  
to the upright position during the bucking cut to separate  
the log from the stump. Watch out for springpoles, they  
are dangerous.  
18  
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MAINTENANcE  
GENERAL MAINTENANcE  
WARNING:  
Avoid using solvents when cleaning plastic parts. Most  
plastics are susceptible to damage from various types of  
commercial solvents and may be damaged by their use. Use  
clean cloths to remove dirt, dust, oil, grease, etc.  
When servicing, use only identical replacement parts.  
Use of any other parts may create a hazard or cause  
product damage.  
WARNING:  
WARNING:  
Do not at any time let brake fluids, gasoline, petroleum-  
based products, penetrating oils, etc., come in contact  
with plastic parts. Chemicals can damage, weaken or  
destroy plastic which may result in serious personal  
injury.  
Always wear safety goggles or safety glasses with side  
shields during power product operation or when blowing  
dust. If operation is dusty, also wear a dust mask.  
WARNING:  
Only the parts shown on the parts list are intended to be  
repaired or replaced by the customer. All other parts should  
be replaced at an Authorized Service Center.  
To avoid serious personal injury, always remove the  
battery pack from the product when cleaning or  
performing any maintenance.  
BATTERY PAcK REMOVAL ANd PREPARATION  
BATTERIES  
FOR REcYcLING  
This product will accept 18 V lithium-ion batteries or 18 V  
nickel-cadmium batteries. Length of service from each  
charging will depend on the type of work you are doing.  
To preserve natural resources, please  
recycle or dispose of batteries  
properly.  
The batteries for this product have been designed to provide  
maximum trouble-free life. However, like all batteries, they  
will eventually wear out. Do not disassemble battery pack  
and attempt to replace the batteries. Handling of these  
batteries, especially when wearing rings and jewelry, could  
result in a serious burn.  
This product uses nickel-cadmium and  
Li - Ion  
lithium-ion batteries. Local, state or  
federal laws may prohibit disposal of  
batteries in ordinary trash.  
Consult your local waste authority for  
informationregardingavailablerecycling  
and/or disposal options.  
To obtain the longest possible battery life, we suggest the  
following:  
For lithium-ion batteries:  
Remove the battery pack from the charger once it is fully  
WARNING:  
charged and ready for use.  
Upon removal, cover the battery pack’s terminals with  
heavy-duty adhesive tape. Do not attempt to destroy or  
disassemble battery pack or remove any of its compo-  
nents. Lithium-ion and nickel-cadmium batteries must  
be recycled or disposed of properly. Also, never touch  
both terminals with metal objects and/or body parts as  
short circuit may result. Keep away from children. Failure  
to comply with these warnings could result in fire and/or  
serious injury.  
For battery pack storage longer than 30 days:  
Store the battery pack where the temperature is below  
80°F and away from moisture.  
Store battery packs in a 30%-50% charged condition.  
Every six months of storage, charge the pack as  
normal.  
For nickel-cadmium batteries:  
Remove the battery pack from the charger once it is fully  
charged and ready for use.  
For battery pack storage longer than 30 days:  
Store the battery pack where the temperature is below  
80°F.  
Store battery packs in a “discharged” condition.  
19  
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MAINTENANcE  
REPLAcING BAR ANd cHAIN  
See Figures 24 - 28.  
ADjusTING  
pIN  
spROCKET  
WARNING:  
Remove the battery pack from the chain saw and make  
sure the chain has stopped before you do any work on  
the saw. Failure to do so may result in accidental starting  
and possible serious injury  
BAR  
WARNING:  
wAshER  
The safety instructions in this section are to protect the  
user from serious personal injury.  
cAUTION:  
ChAIN  
Always wear gloves when handling the bar and chain;  
these components are sharp and may contain burrs.  
ChAIN TENsION  
ChAIN  
COvER  
sCREw  
pIN hOLE  
ChAIN  
COvER  
Fig. ꢀꢁ  
WARNING:  
Nevertouchoradjustthechainwhilethemotorisrunning.  
The saw chain is very sharp; always wear protective  
gloves when performing maintenance to the chain to  
avoid possible serious lacerations.  
Remove the battery pack before you do any work on the  
chain saw.  
Remove the hex key from the storage area and use it to  
remove the chain cover screw, washer and chain cover  
from the chain saw.  
Remove the bar and chain from the mounting surface.  
ChAIN DRIvE  
LINKs  
Remove the old chain from the bar.  
Lay out the new saw chain in a loop and straighten any  
kinks. The cutters should face in the direction of chain  
rotation. If they face the opposite direction, turn the loop  
over.  
BAR  
GROOvE  
Fig. ꢀ5  
Place the chain drive links into the bar groove. Position  
the chain so there is a loop at the back of the bar. Hold  
the chain in position on the bar and place the loop around  
the sprocket of the chain saw. Fit the bar flush against  
the mounting surface so that the bar stud is in the long  
slot of the bar.  
NOTE: When placing the bar on the bar stud, assure that  
the adjusting pin is in the chain tension pin hole.  
ChAIN  
TENsIONING  
sCREw  
REcOMMENdEd BAR ANd cHAIN  
cOMBINATIONS  
Bar Part Number - 10 in.  
671ꢀ5600ꢀ or 67183ꢁ007  
Fig. ꢀ6  
chain Part Number  
6958301 or 69058300ꢀ  
ꢀ0  
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MAINTENANcE  
Replace the chain cover, washer and chain cover screw.  
Tighten the chain cover screw finger tight only. The bar  
must be free to move for tension adjustment.  
LIfT ThE TIp Of  
ThE GuIDE BAR  
up TO ChECK fOR  
sAG  
Remove all the slack from the chain by turning the chain  
tensioning screw clockwise until the chain seats snugly  
against the bar with the drive links in the bar groove.  
Lift the tip of the guide bar up to check for sag. Release  
the tip of the guide bar and turn the chain tensioning  
screw 1/ꢀ turn clockwise. Repeat this process until sag  
does not exist.  
Holdthetipoftheguidebarupandtightenthebarmount-  
ing screw securely.  
Fig. ꢀ7  
Chain is correctly tensioned when there is no sag on the  
underside of the guide bar, the chain is snug, but it can  
be turned by hand without binding.  
NOTE: If chain is too tight, it will not rotate. Loosen the  
chain cover screw slightly and turn tension adjuster 1/ꢁ  
turn counterclockwise. Lift the tip of the guide bar up  
and retighten chain cover screw securely. Assure that  
the chain will rotate without binding.  
Place the hex key back into the storage area.  
cHAIN TENSION  
See Figures 29 - 30.  
hEX KEy  
Stop the engine before setting the chain tension. Make  
sure the guide bar screw is loosened to finger tight, turn  
the chain tensioner clockwise to tension the chain. Refer  
to Replacing Bar and chain earlier in this manual for  
additional information.  
Fig. ꢀ8  
A cold chain is correctly tensioned when there is no slack  
on the underside of the guide bar, the chain is snug, but  
it can be turned by hand without binding.  
Chain must be re-tensioned whenever the flats on the  
drive links hang out of the bar groove.  
AppROX. .050 in.  
Fig. ꢀ9  
During normal saw operation, the temperature of the  
chainwillincrease.Thedrivelinksofacorrectlytensioned  
warm chain will hang approximately .050 in. out of the  
bar groove.  
fLATs  
NOTE: New chain tends to stretch, check chain tension  
frequently and tension as required.  
cAUTION:  
Fig. 30  
Chain tensioned while warm, may be too tight upon  
cooling. Check the “cold tension” before next use.  
ꢀ1  
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MAINTENANcE  
cHAIN MAINTENANcE  
See Figures 31 - 32.  
CuTTING  
CORNER  
cAUTION:  
TOp pLATE  
sIDE pLATE  
Remove the battery pack and make sure the chain has  
stopped before you do any work on the saw.  
DEpTh GAuGE  
RIvET hOLE  
Use only low-kickback chain on this saw. This fast-cutting  
chain will provide kickback reduction when properly main-  
tained.  
hEEL  
TOE  
GuLLET  
Fig. 31  
For smooth and fast cutting, chain needs to be maintained  
properly. The chain requires sharpening when the wood chips  
are small and powdery, the chain must be forced through the  
wood during cutting, or the chain cuts to one side. During  
maintenance of your chain, consider the following:  
ChECK fOR wEAR  
OR DAMAGE  
Improper filing angle of the side plate can increase the  
risk of a severe kickback.  
Raker (depth gauge) clearance.  
Too low increases the potential for kickback.  
Not low enough decreases cutting ability.  
If cutter teeth have hit hard objects such as nails and  
stones, or have been abraded by mud or sand on the  
wood, have service dealer sharpen chain.  
NOTE: Inspect the drive sprocket for wear or damage when  
replacing the chain. If signs of wear or damage are present  
in the areas indicated, have the drive sprocket replaced by  
a Ryobi Service dealer.  
Fig. 3ꢀ  
HOW TO SHARPEN THE cUTTERS  
See Figures 33 - 34.  
Be careful to file all cutters to the specified angles and to  
the same length, as fast cutting can be obtained only when  
all cutters are uniform.  
Wearglovesforprotection.Properlytensionthechainprior  
to sharpening. Refer to chain Tension Section earlier in  
this manual. Do all of your filing at the mid-point of the  
bar.  
Fig. 33  
Use a 5/3ꢀ in. diameter round file and holder.  
LEfT hAND  
CuTTERs  
Keep the file level with the top plate of the tooth. Do not  
let the file dip or rock.  
Using light but firm pressure, stroke towards the front  
corner of the tooth.  
Lift file away from the steel on each return stroke.  
Put a few firm strokes on every tooth. File all left hand  
cutters in one direction. Then move to the other side and  
file the right hand cutters in the opposite direction. Oc-  
casionally remove filings from the file with a wire brush.  
RIGhT hAND  
CuTTERs  
Fig. 3ꢁ  
ꢀꢀ  
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MAINTENANcE  
CORRECT TOp pLATE INCORRECT TOp pLATE fILING  
WARNING:  
fILING ANGLE  
ANGLE  
Improper chain sharpening increases the potential of  
kickback.  
LEss  
ThAN 30°  
MORE  
ThAN 30°  
30°  
WARNING:  
Failure to replace or repair damaged chain can cause  
serious injury.  
Fig. 35  
WARNING:  
CORRECT sIDE  
pLATE fILING  
ANGLE  
INCORRECT sIDE pLATE  
fILING ANGLE  
Thesawchainisverysharp,alwayswearprotectivegloves  
when performing maintenance to the chain.  
hOOK  
BACKwARD  
sLOpE  
TOP PLATE FILING ANGLE  
See Figure 35.  
80°  
CORRECT30°-Fileholdersaremarkedwithguidemarks  
to align file properly to produce correct top plate angle.  
LESS THAN 30° - For Cross Cutting.  
MORE THAN 30° - Feathered Edge Dulls Quickly.  
Fig. 36  
SIdE PLATE ANGLE  
See Figure 36.  
RAKER CLEARANCE  
.025 in.  
CORRECT - 80o Produced automatically if correct diam-  
eter file is used in file holder.  
HOOK - “Grabs” and dulls quickly. Increases potential  
of KIcKBAcK.  
Results from using a file with diameter too small, or file  
held too low.  
BACKWARD SLOPE - Needs too much feed pressure,  
Fig. 37  
causes excessive wear to bar and chain.  
Results from using a file with diameter too large, or file  
held too high.  
dEPTH GAUGE cLEARANcE  
See Figure 37 - 39.  
The depth gauge should be maintained at a clearance of  
.0ꢀ5 in. Use a depth gauge tool for checking the depth  
gauge clearances.  
Every time the chain is filed, check the depth gauge clear-  
ance.  
ꢀ3  
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MAINTENANcE  
Replace the SAFE-T-TIP® on the bar nose.  
Use a Flat File and a Depth Gauge Jointer to lower all gauges  
uniformly. Depth gauge jointers are available in .0ꢀ0 in. to  
.035 in. Use a .0ꢀ5 in. depth gauge jointer. After lowering  
each depth gauge, restore original shape by rounding the  
front. Be careful not to damage adjoining drive links with  
the edge of the file.  
NOTE: The locking tab fits in the recessed hole in the  
bar.  
Tighten the screw with your finger.  
From the finger-tight position, tighten the screw an ad-  
ditional 3/ꢁ of a turn using a wrench.  
Depth gauges must be adjusted with the flat file in the same  
direction the adjoining cutter was filed with the round file.  
Use care not to contact cutter face with flat file when ad-  
justing depth gauges.  
DEpTh GAuGE jOINTER  
GUIdE BAR MAINTENANcE  
See Figure 40.  
When the guide bar shows signs of wear, reverse it on the  
saw to distribute the wear for maximum bar life. The bar  
should be cleaned every day of use and checked for wear  
and damage.  
Feathering or burring of the bar rails is a normal process  
of bar wear. Such faults should be smoothed with a file as  
soon as they occur.  
fLAT fILE  
Fig. 38  
A bar with any of the following faults should be replaced.  
Wear inside the bar rails which permits the chain to lay  
over sideways.  
REsTORE ORIGINAL  
shApE By ROuNDING  
ThE fRONT  
Bent guide bar.  
Cracked or broken rails.  
Spread rails.  
In addition, guide bars with a sprocket at their tip must be  
lubricated weekly with a grease syringe to extend the guide  
bar life. Using a grease syringe, lubricate weekly in the lu-  
bricating hole.  
Fig. 39  
Turn the guide bar and check that the lubrication holes and  
chain groove are free from impurities.  
REVERSING THE GUIdE BAR  
See Figures 40 - 42.  
Remove the SAFE-T-TIP® mounting screw.  
Remove the SAFE-T-TIP® from the bar.  
LuBRICATING hOLE  
Remove the chain from the bar and turn the bar over.  
NOTE: Bottom of bar should not be on top.  
Fig. ꢁ0  
Replace the chain on the bar. Refer to Assembling the  
Bar and chain earlier in this manual for specific infor-  
mation.  
ꢀꢁ  
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MAINTENANcE  
MOuNTING sCREw  
LOCKING RIvET  
WARNING:  
Remove the battery pack and make sure the chain has  
stopped before you do any work on the saw.  
WARNING:  
Although the guide bar comes with a SAFE-T-TIP® anti-  
kickback device already installed, you need to check the  
tightness of the mounting screw before each use.  
SAFE-T-TIP® NOSE GUARd MAINTENANcE  
See Figures 41 - 42.  
Tighten the mounting screw of the nose guard as instructed  
below. These are specially hardened screws. If the screw  
cannot be installed tightly, replace both the screw and the  
SAFE-T-TIP® before further operation. Do not replace with  
an ordinary screw.  
sAfE-T-TIp®  
Fig. ꢁ1  
In addition to preventing chain contact with solid objects at  
the nose of the bar, the SAFE-T-TIP® also helps keep the  
chain away from abrasive surfaces such as the ground. Keep  
it on the right hand side of the bar, where it will be between  
the chain and the ground during flush with ground cutting.  
TIGhTEN 3/4  
Of A TuRN  
The mounting screw requires a 5/16 in. wrench (or adjust-  
able wrench) to achieve the recommended tightness of 35  
to ꢁ5 in. lb. (ꢁ-5 Nm). A tightness within this range can be  
achieved by the following method.  
Tighten the screw with your finger.  
From the finger-tight position, tighten the screw an ad-  
ditional 3/ꢁ of a turn using a wrench.  
Fig. ꢁꢀ  
MOUNTING SAFE-T-TIP® NOSE GUARd  
See Figures 41 - 42.  
Mount the SAFE-T-TIP® on the bar nose.  
NOTE: The tab fits in the recessed hole in the bar.  
Tighten the screw with your finger.  
From the finger-tight position, tighten the screw an ad-  
ditional 3/ꢁ of a turn using a wrench.  
TRANSPORTING ANd STORING  
See Figure 43.  
Do not store or transport the chain saw when it is running.  
The chain saw should always be idle before storing or  
transporting.  
Fig. ꢁ3  
Alwaysplacetheguidebarscabbardonthebarandchain  
before storing or transporting the chain saw. Use caution  
to avoid the sharp teeth of the chain.  
Clean the chain saw thoroughly before storing. Store the  
chain saw indoors, in a dry place that is locked and/or  
inaccessible to children.  
Keep away from corrosive agents such as garden chem-  
icals and de-icing salts.  
ꢀ5  
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TROUBLESHOOTING  
PROBLEM  
cAUSE  
SOLUTION  
1. Tension chain. Refer to chain Tension  
earlier in this manual.  
1. Check chain tension for over  
tight condition  
Bar and chain running hot  
and smoking.  
ꢀ. Check oil tank.  
ꢀ. Chain oil tank empty.  
1. Retension chain, Refer to chain Tension  
earlier in this manual.  
ꢀ. Refer to Assembling the Bar and chain  
earlier in this manual.  
3. Inspect guide bar and chain for  
damage.  
1. Chain tension too tight.  
ꢀ. Check guide bar and chain  
assembly.  
3. Check guide bar and chain  
for damage.  
Motor runs, but chain is not  
rotating.  
CALL us fIRsT  
For any questions about operating or maintaining your product,  
call the Ryobi® Help Line!  
Your product has been fully tested prior to shipment to ensure  
your complete satisfaction.  
ꢀ6  
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WARRANTY  
LIMITEd WARRANTY STATEMENT  
A. Tune-ups – Spark Plugs, Carburetor, Carburetor  
Adjustments, Ignition, Filters  
Techtronic Industries North America, Inc., warrants to the  
original retail purchaser that this RYOBI® brand outdoor  
product is free from defect in material and workmanship  
and agrees to repair or replace, at Techtronic Industries  
North America, Inc.’s, discretion, any defective product  
free of charge within these time periods from the date of  
purchase.  
B. Wear items – Bump Knobs, Outer Spools, Cutting  
Lines, Inner Reels, Starter Pulleys, Starter Ropes, Drive  
Belts,Tines,FeltWashers,HitchPins,MulchingBlades,  
Blower Fans, Blower and Vacuum Tubes, Vacuum Bag  
and Straps, Guide Bars, Saw Chains  
Techtronic Industries North America, Inc., reserves the  
right to change or improve the design of any RYOBI® brand  
outdoorproductwithoutassuminganyobligationtomodify  
any product previously manufactured.  
Two years if the product is used for personal, family or  
household use;  
90 days, if used for any other purpose, such as  
commercial or rental.  
ALL IMPLIED WARRANTIES ARE LIMITED IN DURATION  
TO THE STATED WARRANTY PERIOD. ACCORDINGLY,  
ANY SUCH IMPLIED WARRANTIES INCLUDING  
MERCHANTABILITY, FITNESS FOR A PARTICULAR  
PURPOSE, OR OTHERWISE, ARE DISCLAIMED IN  
THEIR ENTIRETY AFTER THE EXPIRATION OF THE  
APPROPRIATE TWO-YEAR, ONE-YEAR, OR NINETY-  
DAY WARRANTY PERIOD. TECHTRONIC INDUSTRIES  
NORTH AMERICA, INC.’S, OBLIGATION UNDER THIS  
WARRANTYISSTRICTLYANDEXCLUSIVELYLIMITEDTO  
THE REPAIR OR REPLACEMENT OF DEFECTIVE PARTS  
AND TECHTRONIC INDUSTRIES NORTH AMERICA,  
INC., DOES NOT ASSUME OR AUTHORIZE ANYONE  
TO ASSUME FOR THEM ANY OTHER OBLIGATION.  
SOME STATES DO NOT ALLOW LIMITATIONS ON HOW  
LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE  
LIMITATION MAY NOT APPLY TO YOU. TECHTRONIC  
INDUSTRIES NORTH AMERICA, INC., ASSUMES NO  
RESPONSIBILITY FOR INCIDENTAL, CONSEQUENTIAL,  
OR OTHER DAMAGES INCLUDING, BUT NOT LIMITED  
TO, EXPENSE OF RETURNING THE PRODUCT TO AN  
AUTHORIZED RYOBI SERVICE CENTER AND EXPENSE  
OFDELIVERINGITBACKTOTHEOWNER, MECHANIC’S  
TRAVEL TIME, TELEPHONE OR TELEGRAM CHARGES,  
RENTAL OF A LIKE PRODUCT DURING THE TIME  
WARRANTY SERVICE IS BEING PERFORMED, TRAVEL,  
LOSS OR DAMAGE TO PERSONAL PROPERTY, LOSS  
OF REVENUE, LOSS OF USE OF THE PRODUCT,  
LOSS OF TIME, OR INCONVENIENCE. SOME STATES  
DO NOT ALLOW THE EXCLUSION OR LIMITATION OF  
INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE  
ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY  
TO YOU.  
This warranty extends to the original retail purchaser  
only and commences on the date of the original retail  
purchase.  
Any part of this product found in the reasonable judgment  
ofTechtronicIndustriesNorthAmerica, Inc. tobedefective  
in material or workmanship will be repaired or replaced  
withoutchargeforpartsandlaborbyanauthorizedservice  
center for RYOBI® brand outdoor products (Authorized  
Ryobi Service Center).  
Theproduct,includinganydefectivepart,mustbereturned  
to an authorized Ryobi service center within the warranty  
period.Theexpenseofdeliveringtheproducttotheservice  
center for warranty work and the expense of returning it  
back to the owner after repair or replacement will be paid  
by the owner. Techtronic Industries North America, Inc.’s,  
responsibility in respect to claims is limited to making the  
required repairs or replacements and no claim of breach of  
warrantyshallbecauseforcancellationorrescissionofthe  
contractofsaleofanyRYOBI® brandoutdoorproduct.Proof  
of purchase will be required by the dealer to substantiate  
any warranty claim. All warranty work must be performed  
by an authorized service dealer.  
This warranty is limited to ninety (90) days from the date  
of original retail purchase for any RYOBI® brand outdoor  
product that is used for rental or commercial purposes, or  
any other income-producing purpose.  
This warranty does not cover any product that has been  
subject to misuse, neglect, negligence, or accident, or that  
has been operated in any way contrary to the operating  
instructions as specified in this operator’s manual. This  
warranty does not apply to any damage to the product that  
is the result of improper maintenance or to any product  
that has been altered or modified. The warranty does not  
extendtorepairsmadenecessarybynormalwearorbythe  
use of parts or accessories which are either incompatible  
withtheRYOBI® brandoutdoorproductoradverselyaffect  
its operation, performance, or durability. In addition, this  
warranty does not cover:  
This warranty gives you specific legal rights, and you may  
also have other rights which vary from state to state.  
ThiswarrantyappliestoallRYOBI® brandoutdoorproducts  
manufacturedbyorforTechtronicIndustriesNorthAmerica,  
Inc., and sold in the United States and Canada.  
To locate your nearest Authorized Ryobi Service Center,  
dial 1-800-860-ꢁ050.  
ꢀ7  
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OPERATOR’S MANUAL  
18 VOLT cHAIN SAW  
P540  
P540A  
P540B  
PARTS AND SERVICE  
Prior to requesting service or purchasing replacement parts, please obtain your model  
and serial number from the product data plate.  
P5ꢁ0/P5ꢁ0A/P5ꢁ0B  
• MODEL NUMBER  
• SERIAL NUMBER  
HOW TO OBTAIN REPLACEMENT PARTS:  
Replacement parts can be purchased online at www.ryobitools.com or by calling  
1-800-860-ꢁ050. Replacement parts can also be obtained at one of our Authorized  
Service Centers.  
HOW TO LOCATE AN AUTHORIZED SERVICE CENTER:  
Authorized Service Centers can be located online at www.ryobitools.com or by calling  
1-800-860-ꢁ050.  
HOW TO OBTAIN CUSTOMER OR TECHNICAL SUPPORT:  
To obtain Customer or Technical Support please contact us at 1-800-860-ꢁ050.  
RYOBI® is a registered trademark of Ryobi Limited used under license.  
TEcHTRONIc INdUSTRIES NORTH AMERIcA, INc.  
1ꢁꢀ8 Pearman Dairy Road, Anderson, SC ꢀ96ꢀ5  
Phone 1-800-860-ꢁ050  
983000-538  
ꢁ-15-08 (REV:06)  
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