MasterCraft 100524-01, CS-120CB User Manual
MASTERCRAFT
PREMIUM ELECTRIC CHAIN SAW
OWNER’S MANUAL
MODEL 100524-01, CS-120CB
CHAIN BRAKE
IMPORTANT
Read and understand this manual before assembling or operating this chain saw.
Improper use of saw can cause severe injury. Keep this manual for future reference.
CONTENTS
SECTION PAGE
Symbol Information............................................................2
Safety Warnings .................................................................3
Before Operating Chain Saw.......................................3
Kickback......................................................................3
Pushback and Pull-in ...................................................4
Chain Saw Operation ..................................................4
Maintenance and Storage of Chain Saw .....................4
Product Identification .........................................................5
Chain Saw Names and Terms.............................................5
Unpacking...........................................................................5
Filling Oil Tank ..................................................................5
Operating Chain Saw..........................................................6
Extension Cords ..........................................................6
Oiling Chain ................................................................6
Cutting With the Chain Saw........................................6
SECTION PAGE
Chain Brake................................................................. 6
Trimming a Tree..........................................................7
Felling a Tree ..............................................................7
Limbing a Tree ............................................................8
Bucking a Log .............................................................9
Saw Chain Tension Adjustment .........................................10
Replacing Guide Bar / Saw Chain...................................... 11
Cleaning and Maintenance ................................................. 12
Cleaning Saw Body .....................................................12
Care of Guide Bar .......................................................12
Sharpening Your Saw Chain .......................................12
Storage ................................................................................ 14
Replacement Parts .............................................................. 14
Troubleshooting..................................................................15
Warranty Information ......................................... Back Cover
CSA Classification for this saw is 2C; The consumer chain saw intended for general use by home owners, cottagers, etc., and for such general applications as clearing, pruning, cutting firewood, etc.
INFORMATION SYMBOLS
Read Instruction Manual
Do Not Expose to Rain or Use in Wet Conditions
Remove Plug Immediately if Cable is Damaged or
Cut
Hold Chain Saw with Both Hands
Beware of Kickback
Hearing and Eye Protection Must Be Worn
Safety Information Warnings Appears Throughout
This Manual
Pay close attention to them. Below are definitions for the
safety information listed throughout this manual.
WARNING indicates a hazard which can cause severe
personal injury, death, or substantial property damage if
you ignore warning.
CAUTION indicates a hazard which will or can cause
minor personal injury or property damage if you ignore
warning.
!
WARNING ICON G 001
2
100549
!
SAFETY WARNINGS
WARNING ICON G 001
Read and understand all Safety Warnings on pages
3 and 4. Improper use of this chain saw can cause
severe injury or death from fire, electrical shock,
body contact with moving chain, or falling wood.
BEFORE OPERATING CHAIN SAW
1. Read and understand this owner’s manual before operating
chain saw.
2. Use chain saw for cutting wood only. Do not use for
cutting any non-wood items.
3. Only well-instructed adults should operate chain saw. Never
allow children to operate chain saw. First-time user should
obtain informed, practical instruction in addition to reading
this manual. Practice cutting logs on a saw horse or cradle.
4. Use only electrical voltage noted on model plate of chain saw.
5. Use only extension cords marked for outdoor use. See
page 8 for extension cord requirements.
6. Do not operate chain saw
• while under the influence of alcohol, medication, or drugs
• in rain or in damp or wet areas
• where highly flammable liquids or gases are present
• if saw is damaged, adjusted wrong, or not fully assembled
• if trigger does not turn saw on and off. Chain must stop
moving when you release trigger. Have faulty switch
replaced by authorized service person.
• while tired or in a hurry
• while in tree or on a ladder unless trained to do so
7. Wear snug-fitting clothes when operating chain saw. Do
not wear loose clothing or jewelry. They can get caught in
moving saw chain.
8. Wear the following safety gear when operating chain saw:
• heavy-duty gloves (wear rubber gloves if working outdoors)
• steel-toed safety footwear with non-skid soles
• eye protection such as safety glasses, goggles, or face screen
• safety hard hat
• ear mufflers or ear plugs
• hair covering to contain long hair
• face or dust mask (if working in dusty areas)
9. Before cutting, always provide the following:
• clear work area
• secure footing
• planned retreat path from falling tree
10.Inspect tree before cutting down. Make sure there are no
dead limbs or branches that may fall on you.
This saw has a chain brake. When kickback occurs, the front
hand guard is moved forward by the back of operator’s left
hand. This stops the saw chain quickly, reducing the chance of
serious injury.
Never hold the chain saw by the front hand guard.
Cause Of Kickback
Kickback may occur when nose or tip of guide bar touches an
object while chain is moving. If chain cutter catches on object,
a sudden reverse action will result. The guide bar will kick up
and back towards operator.
Kickback may also occur when wood pinches chain at guide
bar nose. A sudden reverse action will also result.
The following steps will reduce the risk of kickback:
• Use both hands to grip saw while saw is running. Use firm
grip. Thumbs and fingers must wrap around saw handles.
• Keep all safety items in place on saw. Make sure they
work properly.
• Do not overreach or cut above shoulder height.
• Keep solid footing and balance.
• Stand slightly to left side of saw. This keeps your body
from being in direct line with chain.
• Do not let guide bar nose touch anything when chain is
moving (see Figure 1).
Direction
Do Not Let
Guide Bar Nose
Touch Here
90°
Quadrant
KICKBACK
!
WARNING
WARNING ICON G 001
Avoid Kickback. Kickback can cause you to lose
control of chain saw. Kickback can cause severe
injury or death.
Kickback Safety Devices On This Saw
This saw has a low-kickback chain and reduced-kickback
guide bar. Both items reduce the chance of kickback. Kickback can still occur with this saw. Do not let tip of guide bar
touch anything when chain is moving.
100549
Figure 1 - Kickback Hazard Example. Do Not Let Nose of
Guide Bar Touch Object While Chain is Moving
• Never try cutting through two logs at same time. Only cut
one log at a time.
•
Do not bury guide bar nose or try plunge cut (boring into
wood using guide bar nose).
• Watch for shifting of wood or other forces that may pinch
chain.
• Use extreme caution when re-entering a previous cut.
• Use low-kickback chain and guide bar supplied with this
chain saw. Only replace these parts with chains and guide
3
Continued
3
!
SAFETY WARNINGS
WARNING ICON G 001
Continued
bars listed in this manual.
• Never use dull or loose chain. Keep chain sharp and
tensioned correctly.
Saw Maintenance and Kickback Safety
Follow maintenance instructions in this manual. Proper cleaning
of saw and chain and guide bar maintenance can reduce chances
of kickback. Inspect and maintain saw after each use. This will
increase the service life of your saw.
sharpening, risk of kickback can increase with each sharpening.
Note:
Even with proper
PUSHBACK AND PULL-IN
!
WARNING
WARNING ICON G 001
Avoid pushback and pull-in. These hazards can
cause you to lose control of chain saw.
Pushback or pull-in can cause severe injury.
Cause Of Pushback and Pull-In
Pushback may occur while cutting with top of guide bar.
Pushback will force saw back towards you. Pull-in may occur
while cutting with bottom of guide bar. Pull-in will force saw
in towards wood you are cutting. These hazards can occur if
chain is pinched, caught, or contacts a non-wood object.
The following steps will reduce the risk of pushback or pull-in:
• Use both hands to grip saw while saw is running. Use firm
grip. Thumbs and fingers must wrap around saw handles.
• Do not overreach or cut above shoulder height.
• Keep solid footing and balance.
• Stand slightly to left side of saw. This keeps your body
from being in direct line with chain.
• Have saw running at full speed before starting a cut.
• When cutting, make sure spike of saw is against wood (pull-
in only). See Product Identification, page 5, to locate spike.
• Never try cutting through two logs at same time. Only cut
one log at a time.
• Watch for shifting of log or other forces that may pinch
chain.
• Use extreme caution when re-entering a previous cut.
• Do not twist saw when removing guide bar from undercut.
• Use wedges made of plastic, wood, or light alloy (never steel
or iron) to hold cut open.
CHAIN SAW OPERATION
1. Stay alert. Use common sense while operating chain saw.
2. Keep work area clean. Cluttered areas invite injuries.
3. Be aware of extension cord while operating chain saw. Be
careful not to trip over cord.
4. Keep children, animals, and bystanders away from chain
saw and extension cord. Only chain saw user should be in
work area.
5. Do not cut down a tree unless you are trained or have
expert help.
6. If two or more persons perform bucking and felling
operations at the same time, provide plenty of distance
between operations. Provide distance of at least twice the
height of tree being felled.
7. Secure wood you are cutting by using clamps or chocks.
8. Grip chain saw firmly with both hands. Never operate
chain saw with one hand. Never use hand guard as handle.
9. Keep finger off trigger until ready to make cut.
10. Before starting chain saw, make sure chain is not touching anything.
11. Avoid body contact with grounded objects such as pipes,
wire fences, and metal posts.
12. Keep all parts of body away from chain when saw is running.
13. Do not force chain saw while cutting. Apply light pressure.
14. Cut small brush and saplings with extreme care. Slender
material may catch in chain and be whipped toward you.
This could also pull you off balance.
15. When cutting limb or tree trunk that is under tension, use
extreme caution. Be alert for wood springing back. When
wood tension is released, limb could spring back and
strike operator causing severe injury or death.
16. Do not activate the chain brake to stop saw. Always
release trigger to stop saw.
17. Carry chain saw from one place to another
• with chain saw unplugged
• by holding front handle (never use front hand guard as
handle)
• with finger off trigger
• with guide bar and chain to rear
• with scabbard in place
MAINTENANCE AND STORAGE OF CHAIN SAW
1. Unplug chain saw from power source
• when not in use
• before moving from one place to another
• before servicing
• before changing accessories or attachments
2. Inspect chain saw before and after each use. Check saw
closely if guard or other part has been damaged. Check
for any damage that may affect operator safety or
operation of saw. Check for alignment or binding of
moving parts. Check that switch turns motor on and off.
Check chain brake. Check for broken or damaged parts.
Do not use chain saw if damage affects safety or operation. Have damage repaired by authorized service person.
3. Maintain chain saw with care.
• Never expose saw to rain.
• Keep chain sharp, clean, and lubricated.
• Follow steps outlined in this manual to sharpen chain.
• Keep handles dry, clean, and free of oil.
• Keep all screws and nuts tight.
• Inspect power cord often. If damaged, have repaired by
authorized service person.
• Never carry chain saw by power cord.
• Never yank power cord to unplug it.
• Keep power cord from heat, oil, and sharp edges.
• Inspect extension cords often and replace if damaged.
4. When servicing, use only identical replacement parts.
5. Always store chain saw
• in a high or locked place, out of children’s reach
• in a dry place
• in a carrying case or with scabbard over guide bar
Keep this manual for reference. It is your guide to safe and
proper operation of this chain saw.
4
100549
PRODUCT IDENTIFICATION
Front Hand Guard/
Chain Brake
Saw
Chain
Rear
Handle
Spike
Rear Hand
Guard
Power Cord
Oil Level Sight Hole (located on
saw body, hidden by front handle)
Oil Cap
Front
Handle
Motor
Housing
Guide Bar
Trigger
Guide Bar
Nose
Switch
Lockout
Limbing Process of cutting limb(s) from a felled tree.
Low-Kickback Chain Chain that reduces chance of
kickback as required by CSA Standard Z62.3.
Normal Cutting Position Stance used while making
bucking and felling cuts.
Notching Cut Notch cut in tree that directs fall of tree.
Oiler Control System for oiling guide bar and chain.
Power Head Chain saw without chain and guide bar. Also
known as saw body.
Pushback (Kickback, Pinch) Rapid pushback of chain
saw. Pushback may occur if chain along top of guide bar is
pinched, caught, or contacts a foreign object.
Rear Handle Handle located at rear of saw body.
Reduced Kickback Guide Bar Guide bar that reduces
chance of kickback.
Replacement Chain Chain that complies with CSA
Standard Z62.3 when used with a specific saw. It may not meet
CSA requirements when used with other saws.
Saw Chain (Chain) Loop of chain having cutting teeth for
cutting wood. The motor drives chain. The guide bar supports
chain.
Spiked Bumper (Spike) Pointed teeth at front of saw body
beside guide bar. Keep spiked bumper in contact with wood
when felling or bucking. It helps maintain position of saw
while cutting.
Sprocket Toothed wheel that drives chain.
Switch Device that completes or interrupts electrical circuit
to motor of saw.
Switch Linkage This device connects switch to trigger. It
moves switch when you squeeze trigger.
Switch Lockout Device that reduces accidental starting of
saw.
Trigger Device that turns saw on and off. Squeezing trigger
turns saw on. Releasing trigger turns saw off.
Trimming (Pruning) Process of cutting limb(s) from a
living tree.
Undercut An upward cut from underside of log or limb. This
is done while in normal cutting position and cutting with top of
guide bar.
Figure 2 - Electric Chain Saw
CHAIN SAW NAMES AND TERMS
Bucking Process of cutting a felled tree or log into lengths.
Felling Process of cutting down a tree.
Felling Cut Final cut when felling a tree. Make this cut on
opposite side of tree from notching cut.
Front Hand Guard Shield between front handle and guide
bar. Protects left hand while using saw. When kickback occurs,
the front hand guard is moved forward by the back of
operator’s left hand. This stops the saw chain quickly, reducing
the chance of serious injury.
Front Handle Located at front of saw body.
Guide Bar Metal bar that extends from saw body. The guide
bar supports and guides chain.
Guide Bar Nose Tip or end of guide bar.
Kickback Quick backward and upward motion of guide bar.
Kickback may occur when tip of guide bar touches an object
while chain is moving. The guide bar will kick up and back
towards operator.
100549
UNPACKING
1. Remove all items from carton.
2. Check all items for any shipping damage. If you find any
damage or if any parts are missing, promptly inform
dealer where you bought chain saw.
FILLING OIL TANK
1. Remove oil cap.
2. Fill oil tank with SAE #30 motor oil.
tures below -1°C, use SAE #10 oil. For temperatures above
24°C, use SAE #40 oil.
3. Replace oil cap at once. Tighten oil cap firmly for good
seal. This will avoid oil seepage from tank.
4. Wipe off excess oil.
Note:
It is normal for oil to seep when saw is not in use.
Empty oil tank , tighten oil cap, and store upside down after
each use to prevent seepage.
5
Note:
For tempera-
5
OPERATING CHAIN SAW
!
WARNING
Read and understand this owner’s manual
before operating this saw. Make certain you read
and understand all Safety Warnings. Improper
use of this chain saw can cause severe injury or
death from fire, electrical shock, or body contact
with moving chain, or falling wood.
EXTENSION CORDS
Use proper extension cord with this chain saw. Use only
extension cords marked for outdoor use. Use an extension cord
no less than 1.5 mm
(100 feet). The cord must be marked with suffix W-A following the cord type marking.
Use an extension cord heavy enough to carry the current your
saw will draw. An undersized cord will cause a voltage drop at
the saw, loss of power, and overheating.
Keep cord away from cutting area. Make sure cord does not
catch on branches or logs during cutting. Inspect cords often.
Replace damaged cords.
The extension cord may come undone from the power cord
during use. To avoid this, make a knot with the two cords as
shown in Figure 3 below.
Extension
Cord
2
(14SWG) at distances up to 30 meters
Example
: SJTW-A
Chain Saw
Power Cord
4. Make sure your footing is firm. Keep feet apart. Divide your
weight evenly on both feet. Stand slightly to left side of saw.
This keeps your body from being in direct line with chain.
5. When ready to make a cut, press in switch lockout with
right thumb and squeeze trigger (see Figure 5). This will
turn saw on. Releasing trigger will turn saw off. Make sure
saw is running at full speed before starting a cut.
Front Hand
Guard
Figure 5 - Front Hand Guard, Switch Lockout,
and Trigger Location
6. When starting a cut, place moving chain against wood.
Hold saw firmly in place to avoid possible bouncing or
skating (sideways movement) of saw.
7. Guide saw using light pressure. Do not force saw. The
motor will overload and can burn out.
8. Remove saw from a cut with saw running at full speed.
Stop saw by releasing trigger. Do not use the chain brake.
Make sure chain has stopped before setting saw down.
9. Practice until you can maintain a steady, even cutting rate.
Switch
Lockout
Trigger
Figure 3 - Tying Extension Cord and Power Cord in Knot
OILING CHAIN
Always check oil level before using saw. To oil chain, press oil
cap. Oil will feed onto guide bar and chain. Press oil cap at
least once before each cut. Check oil level often by looking at
oil sight level hole. Oil sight level hole is on left side of saw,
between front handle and front hand guard.
Figure 4 - Pressing Oil Cap to Oil Chain
CUTTING WITH THE CHAIN SAW
1. Connect saw to extension cord. Connect extension cord to
power supply.
2. Make sure section of log to be cut is not laying on ground.
This will keep chain from touching ground as it cuts through
log. Touching ground with moving chain will dull chain.
3. Use both hands to grip saw. Always use left hand to grip
front handle and right hand to grip rear handle. Use firm
grip. Thumbs and fingers must wrap around saw handles
(see Figure 5).
CHAIN BRAKE
The chain brake quickly stops the saw chain. Kickback causes
the back of operator’s left hand to contact front hand guard
(see Figure 6). When front hand guard moves forward, the
saw chain stops. This reduces the chance of serious injury
during kickback. When the chain brake activates, release
trigger at once.
STOP
Figure 6 - The chain brake quickly stopping the saw chain
To reset chain brake, release trigger and move front hand
guard back into position. You must release trigger first. If not,
the saw will start when you reset the front hand guard.
Note:
Test chain brake before each use. Firmly grip saw with
both hands. With saw running, move front hand guard forward
with back of left hand. Keep both hands on the handles. Saw
chain should stop. If chain brake does not work, have saw
repaired by authorized service person.
6
100549
OPERATING CHAIN SAW
Continued
TRIMMING A TREE (Pruning)
!
WARNING
Avoid kickback. Kickback can result in severe
injury or death. See
risk of kickback.
Do not operate chain saw while
• in a tree
• on a ladder or any other unstable surface
• in any awkward position
You may lose control of saw causing severe injury.
Do not cut limbs higher than your shoulders.
Kickback
!
WARNING
!
WARNING
, page 3 to avoid
FELLING A TREE (Cutting Down a Tree)
!
WARNING
• Avoid kickback. Kickback can result in severe
injury or death. See
risk of kickback.
• Do not fell a tree without ample skill or expert
help.
• Keep children, animals, and bystanders away
from area when felling a tree.
• If two or more persons perform bucking and
felling operations at the same time, provide ample
distance between operations. Provide distance of
at least twice the height of tree being felled.
When felling a tree, be aware of your
surroundings. Do not endanger any person,
strike utility lines, or cause property damage. If
tree strikes utility lines, contact utility company
at once.
Kickback
!
W ARNING
, page 3 to avoid
Trimming a tree is the process of cutting limbs from a living
tree. Make sure your footing is firm. Keep feet apart. Divide
your weight evenly on both feet. Follow directions below to
trim a tree.
1. Make first cut 15 centimeters (six inches) from tree trunk
on underside of limb. Use top of guide bar to make this
cut. Cut 1/3 through diameter of limb (see Figure 7).
2. Move five to ten centimeters (two to four inches) farther
out on limb. Make second cut from above limb. Continue
cut until you cut limb off.
3. Make third cut as close to tree trunk as possible on
underside of limb stub. Use top of guide bar to make this
cut. Cut 1/3 through diameter of stub.
4. Make fourth cut directly above third cut. Cut down to meet
third cut. This will remove limb stub.
!
CAUTION
Seek professional help if facing conditions
beyond your ability.
4th Cut - Final
Stub Cut
2nd Cut - Pruning Cut
(to avoid pinching)
!
CAUTION
Seek professional help if facing conditions
beyond your ability.
Felling is the process of cutting down a tree. Make sure your
footing is firm. Keep feet apart. Divide your weight evenly on
both feet. Follow directions below to fell a tree.
Before Felling a Tree
1. Before felling, inspect tree. Make sure there are no dead
limbs or branches that may fall on you. Study natural lean
of tree, location of larger branches, and wind direction.
This will help you judge which way tree will fall.
2. Clear work area around tree.
3. Plan and clear a retreat path before felling. Make retreat
path opposite to planned direction of fall of tree and at 45°
angle (see Figure 8).
Retreat
Path
Direction of Fall
100549
15 cm
(6")
5 to 10 cm (2" to 4")
1st Cut - Pruning Undercut
(to avoid splintering)
3rd Cut - Stub Undercut
(to avoid splintering)
Figure 7 - Cutting A Limb
45°
Retreat
Path
Figure 8 - Retreat Path From Tree
4. Remove dirt, stones, loose bark, nails, staples, and wire
from tree where you will make felling cuts.
5. Stay on uphill side when felling tree. Tree could roll or
slide downhill after falling.
7
Tree
Continued
7
OPERATING CHAIN SAW
Continued
Felling Procedure
Felling Notch
A properly placed felling notch will determine direction tree
will fall. Place felling notch on side of tree in direction you
want tree to fall (see Figure 9). Follow directions below to
create a felling notch.
1. Make lower notch cut as close to ground as possible. Hold
saw so guide bar is horizontal. Cut 1/3 the diameter of tree
trunk (see Figure 9).
lower notch cut first. If you make this cut second, tree can
pinch chain or guide bar.
2. Start upper notch cut the same distance above first cut as
first cut is deep.
Example:
inches), start upper notch cut 20 centimeters (eight inches)
above it. Cut downward at 45° angle. The upper notch cut
should meet end of lower notch cut (see Figure 9).
3. Remove tree trunk wedge created by notching cuts.
Felling Cut
1. Make felling cut five centimeters (two inches) higher than
lower notch cut and on opposite side of tree (see Figure
9). Keep felling cut parallel to lower notch cut.
2. Cut towards notch.
If lower notch cut is 20 centimeters deep (eight
Note:
Always make this horizontal
4. When tree begins to fall, quickly
• remove saw from felling cut
• release trigger to turn saw off
• put saw down
• exit area using retreat path
!
WARNING
Be alert for falling overhead limbs. Watch your
footing while exiting area.
LIMBING A TREE
!
WARNING
Avoid kickback. Kickback can result in severe
injury or death. See
risk of kickback.
When cutting limb that is under tension, use
extreme caution. Be alert for wood springing
back. When wood tension is released, limb could
spring back and strike operator causing severe
injury or death.
Kickback
!
WARNING
, page 3 to avoid
!
WARNING
Do not cut all the way through tree. Leave about
five centimeters (two inches) of tree diameter
uncut directly behind felling notch (see Figure 9).
This uncut portion acts as a hinge. The hinge
helps keep tree from twisting and falling in wrong
direction.
3rd Cut Felling Cut
5 cm
(2 inches)
Hinge
5 cm
(2 inches)
Direction of Fall
2nd Cut Upper
Notch Cut
1st Cut Lower
Notch Cut
!
CAUTION
Seek professional help if facing conditions
beyond your ability.
Limbing is removing branches from a fallen tree. Make sure
your footing is firm. Keep feet apart. Divide your weight
evenly on both feet. Do not remove larger limbs under tree that
support log off ground. Remove each limb with one cut (see
Figure 10). Clear cut limbs from work area often. This will
help maintain a safe work area.
Make sure you start your cut where limb will not pinch saw during
cutting. To avoid pinching, start cut on freely hanging limbs from
above limb. Start cut on limbs under tension from under limb. If
pinch occurs, turn saw off, lift limb, and remove saw.
Figure 9 - Felling A Tree
3. As felling cut nears hinge, tree should begin to fall.
needed, drive wedges into felling cut to control direction of
fall. If tree settles back and pinches chain, drive wedges
into felling cut to remove saw. Only use wedges made of
wood, plastic, or aluminum. Never use wedge made of
steel. This could cause kickback and damage to chain.
Note:
If
Figure 10 - Limbing A Tree
8
100549
OPERATING CHAIN SAW
Continued
BUCKING A LOG
!
WARNING
Avoid kickback. Kickback can result in severe
injury or death. See
risk of kickback.
Kickback
, page 3 to avoid
Log Supported On One End
1. Make first cut on underside of log (see Figure 12). Use top
of guide bar to make this cut. Cut 1/3 through diameter of
log. This cut will keep section from splintering when cut.
2. Make second cut directly above first cut. Cut down to meet
first cut. This cut will keep log from pinching guide bar
and chain.
!
WARNING
• If on slope, make sure log will not roll down
hill. Secure log by using wooden stakes. Drive
wooden stakes into ground on downhill side
of log. Stand on uphill side of log while
cutting. Log may roll after cutting.
• Never try cutting through two logs at same
time. This could increase the risk of kickback.
• While cutting log, never hold log with your
hand, leg, or foot.
• While cutting log, never allow another person
to hold log.
• Turn off and unplug saw before moving from
one place to another.
!
CAUTION
Seek professional help if facing conditions
beyond your ability.
Bucking a log is cutting a log into sections. Make sure your
footing is firm. Keep feet apart. Divide your weight evenly on
both feet. Stand slightly to left of saw. This keeps your body
from being in direct line with chain. When possible, raise log
or section off ground. Do this by using limbs, logs, chocks, etc.
When cutting through log, maintain control by reducing
cutting pressure near end of cut. Do not relax your grip on
chain saw handles. Do not let moving chain touch ground.
Ground will dull moving chain. After cutting through log,
release trigger to turn saw off before moving saw.
2nd Cut
1st Cut
Figure 12 - Bucking Log When Log Is Supported
On One End
Log Supported On Both Ends
1. Make first cut from above log (see Figure 13). Cut 1/3
through diameter of log. This cut will keep section from
splintering when cut.
2. Make second cut on underside of log, directly under first cut.
Use top of guide bar to make this cut. Cut up to meet first
cut. This will keep log from pinching guide bar and chain.
1st Cut
Follow directions below to buck a log.
Entire Length Of Log On Ground
Cut log from top (see Figure 11).
Figure 11 - Bucking Log With Entire Length On Ground
100549
2nd Cut
Figure 13 - Bucking Log When Log Is Supported
On Both Ends
9
9
SAW CHAIN TENSION
ADJUSTMENT
!
W ARNING
Unplug chain saw from power source before
adjusting saw chain tension.
!
W ARNING
Cutting edges on chain are sharp. Use protective
gloves when handling chain.
!
W ARNING
Maintain proper chain tension always. A loose
chain will increase the risk of kickback. A loose
chain may jump out of guide bar groove. This
may injure operator and damage chain. A loose
chain will cause chain, guide bar, and sprocket
to wear rapidly.
Note:
For pre assembled models, the saw chain tension is
properly set at factory. A new chain will stretch. Check new
chain after first few minutes of operation. Allow chain to cool
down. Follow steps below to readjust saw chain tension.
1. Before adjusting chain, make sure guide bar nuts are only
finger tight (see Figure 16, page 11). Also make sure
adjusting block is in oval adjusting hole on guide bar (see
Figure 16 and 17, page 11).
2. Turn adjusting screw clockwise until all slack is out of
chain (see Figure 14).
Note:
There should be no gap between side links of chain
and bottom of guide bar (see Figure 15)
3. Wearing protective gloves, move chain around guide bar.
Chain should move freely. If chain does not move freely,
loosen chain by turning adjusting screw counterclockwise.
4. After chain tension is correct, tighten guide bar nuts firmly.
If not, guide bar will move and loosen chain tension. This
will increase the risk of kickback. This can also damage
saw.
Note:
A new chain will stretch. Check new chain
after first few minutes of operation. Allow chain to cool
down. Readjust chain tension.
Figure 14 - Turning Adjusting Screw
Guide Bar
Nuts
Guide Bar
Gap
Incorrect Tension
Figure 15- Saw Chain Adjustment
Guide Bar
Correct
Tension
10
100549
REPLACING GUIDE BAR / SAW
CHAIN
1. Lay new saw chain out flat.
2. Remove sprocket cover.
3. Remove guide bar nuts from guide bar bolts (see Figure 16).
4. Turn adjusting screw counterclockwise (see Figure 17).
Continue to turn adjusting screw until adjusting block is to
rear of adjusting plate.
5. Remove old guide bar/saw chain.
6. Install new guide bar onto saw body. Place rear of guide
bar between adjusting plate and sprocket support.
IMPORTANT:
oval adjusting hole on guide bar.
7. Attach guide bar nuts to guide bar bolts.
IMPORTANT:
sure adjusting block is in oval adjusting hole on guide bar.
8. Place chain around drive sprocket, then along top groove
of guide bar and around guide bar nose.
Note
: Make sure cutting edges of chain are facing the
right direction. Position chain so cutting edges on top of
guide bar face guide bar nose (see Figure 17).
Do not place chain on saw backwards. If chain is
backwards, saw will vibrate badly and will not cut.
Make sure to insert adjusting block into
Tighten guide bar nuts finger tight only. Make
!
CAUTION
Cutting
Towards
Guide
Bar Nose
Drive
Sprocket
Sprocket
Support
Figure 16 - Assembling Guide Bar, Chain, and Hand Guard
Edge
Guide Bar
Bolts
Guide Bar
Nuts
Saw
Chain
Guide
Bar
Adjusting
Hole
9. Adjust saw chain tension. Follow steps under Saw
Chain Tension Adjustment, page 10.
10. Replace sprocket cover.
Sprocket
Support
Adjusting
Block
Figure 17 - Part Locations for Assembling Guide Bar
Adjusting
Plate
Adjusting
Screw
100549
11
11
Loading...