Desa 099178H User Manual
ELECTRIC CHAIN SAW
OWNER’S MANUAL
®
®
MODELS
LNT-2: 076728K, 099178H, 100089-06, 100089-08, & 107709-01
EL-7: 075762J, 098031J, 099039J, 100089-04, 100089-05,
100089-07, & 107714-02
Pole Saw: 104316-04 (8"), 106890-01(10")
Pole Saw Assembly: 104317 (8"), 106821 (10")
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.
®
®
ELECTRIC CHAIN SAW
SAFETY
WARNINGS
Make certain you read and understand all
pages 2 and 3. 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 SAW
1. Read and understand this owner’s
manual before operating chain saw.
2. Watch what you are doing. Use common sense. Do not operate saw when
you are tired.
3. Use chain saw for cutting wood only.
Do not use chain saw for purpose not
intended. Do not use for cutting plastic, masonry, etc.
4. Only well-instructed adults should operate chain saw. Never allow children
to operate chain saw.
5. Use only electrical voltage noted on
model plate of chain saw.
6. Use only extension cords marked for
outdoor use. See page 8 for extension
cord requirements.
7. 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 and securely 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 center.
• while in a hurry
• while in tree or on a ladder unless
trained to do so
8. Wear snug-fitting clothes when operating chain saw. Do not wear loose
clothing or jewelry. They can get caught
in moving saw chain.
9. Wear the following safety gear when
operating chain saw.
• heavy-duty gloves (wear rubber
gloves when working outdoors)
• steel-toed safety footwear with non-
skid soles
Safety Warnings
on
•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)
10. Before cutting, always provide the following:
• clear work area
• secure footing
• planned retreat path from falling tree
11. Inspect tree before cutting down. Make
sure there are no dead limbs or branches
that may fall on you.
12. To reduce the risk of electric shock, this
saw has a polarized plug (one blade is
wider than the other). This plug will fit
in a polarized outlet only one way. If
the plug does not fit fully in the outlet
of your extension cord, reverse the plug.
If it still does not fit, a polarized extension cord will be necessary. Do not
change the plug in any way.
WHILE OPERATING SAW
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. Keep cord away from chain
and operator at all times.
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. To guard against electrical shock, avoid
body contact with grounded objects
such as pipes, 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. It will do the job
better and safer at the rate for which it
was intended.
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. Carry chain saw from one place to another
• with saw stopped and unplugged
• by holding front handle (never use
hand guard as handle)
• with finger off trigger
• with guide bar and chain to rear
WARNING: This product contains chemicals known to the
State of California to cause cancer or birth defects, or other reproductive harm.
WARNING: Some dust created
by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals
known (to the state of California) to
cause cancer, birth defects, or
other reproductive harm. Some
examples of these chemicals are:
• lead from lead-based paints
• crystalline silica from bricks
and cement and other masonry
products
• arsenic and chromium from
chemically-treated lumber
Your risk from these exposures
varies, depending on how often
you do this type of work. To reduce
your exposure to these chemicals:
work in a well ventilated area, and
work with approved safety equipment, such as those dust masks
that are specially designed to filter
out microscopic particles.
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OWNER’S MANUAL
SAFETY
WARNINGS
KICKBACK
WARNING: Kickback may occur when the nose or tip of the
guide bar touches an object, or
when the wood closes in and
pinches the saw chain in the cut.
Tip contact in some cases may
cause a lightning fast reverse reaction, kicking the guide bar up
and back towards the operator.
Pinching the saw chain along the
top of the guide bar may push the
guide bar rapidly back towards
the operator. Either of these reactions may cause you to lose
control of the saw which could
result in serious injury to user.
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.
Properly install front hand guard. This item
can reduce injuries from kickback. Follow
assembly instructions on page 6. Do not
remove front hand guard. Do not replace
front hand guard with substitute.
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 at all
times
• 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
90°
Quadrant
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 reentering a
previous cut.
• Use low-kickback chain and guide bar
supplied with this chain saw. Only replace these parts with chains and guide
bars listed in this manual.
• Never use dull or loose chain. Keep chain
sharp with proper tension.
• Do not hand sharpen chain on automatic
chain sharpening (Fast Sharp) models.
Do Not Let
Guide Bar
Touch Here
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.
proper sharpening, risk of kickback can
increase with each sharpening.
Note:
Even with
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, such as saw chain and
guard
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
for broken or damaged parts. Do not
use chain saw if damage affects safety
or operation. Have damage repaired by
authorized service center.
3. Maintain chain saw with care.
• Never expose saw to rain.
• Keep chain sharp, clean, and lubri-
cated for better and safer performance.
• Follow steps outlined in this manual
to sharpen chain.
•Keep handles dry, clean, and free of
oil and grease.
• Keep all screws and nuts tight.
• Inspect power cord often. If dam-
aged, have repaired by authorized
service center.
• 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. When not in use, 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.
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®
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 Handle Located at front of saw body.
Front Hand Guard Shield between front
handle and guide bar. Protects left hand
while using saw.
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.
Limbing Process of cutting limb(s) from a
felled tree.
Low-Kickback Chain Chain that reduces
chance of kickback as required by ANS
B175.1.
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 ANS B175.1 when used with a specific
saw. It may not meet ANS 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 acci-
dental 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.
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107990
OWNER’S MANUAL
PRODUCT
IDENTIFICATION
Rear
Handle
Rear Hand
Guard
Power Cord
Front Hand
Guard
Saw
Chain
Sprocket
Cover
Oil Level Sight Hole
(located on saw body,
hidden by front handle)
Guide Bar
Nose
Guide Bar
Scabbard
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.
Front Handle
Spike
Motor
Housing
Figure 2 - Electric Chain Saw
Switch
Lockout
Oil Cap With
Squeeze Bulb
Trigger
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®
ELECTRIC CHAIN SAW
ASSEMBLY
Note:
Some models are pre assembled. As-
sembly is not needed on these models.
See Saw Chain Tension Adjustment, page 7.
WARNING: Cutting edges on
chain are sharp. Use protective
gloves when handling chain.
IMPORTANT: Do not clamp chain
saw in vise during assembly.
The plastic hardware bag should include:
• two guide bar bolts
• two guide bar nuts
• one Phillips-head tapping screw
• automatic chain sharpener (Fast Sharp
models only)
1. Lay chain out flat.
2. Install front hand guard onto saw body.
Do this by pressing two mounting standouts on hand guard into hex-shaped
holes in saw body (see Figure 3).
3 Insert tapping screw through hand
guard and into saw handle. Tighten
screw firmly.
4. Turn adjusting screw counterclockwise
(see Figure 4). Continue to turn adjusting screw until adjusting block is to rear
of adjusting plate.
5. Install guide bar onto saw body. Place
rear of guide bar between adjusting
plate and sprocket support.
IMPORTANT:
justing block into oval adjusting hole
on guide bar.
6. Line up holes on sprocket support with
center slot on guide bar and holes in
saw body.
7. Insert guide bar bolts through front
hand guard, saw body, center slot of
guide bar, and sprocket support. Attach
guide bar nuts to guide bar bolts.
IMPORTANT:
finger tight only. Make sure adjusting block is in oval adjusting hole on
guide bar.
Make sure to insert ad-
Tighten guide bar nuts
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
CAUTION: Do not place chain
on saw backwards. If chain is
backwards, saw will vibrate badly
and will not cut.
cutting edges on top of guide bar face
guide bar nose (see Figure 3).
9. Adjust saw chain tension. Follow steps
under Saw Chain Tension Adjustment,
Tapping
Screw
Guide Bar
Bolts
Mounting
Stand-Outs
Figure 3 - Assembling Guide Bar, Chain, and Hand Guard
Adjusting
Block
Front Hand
Guard
Towards
Guide
Bar Nose
page 7.
Cutting
Edge
Cutting
Edge
Drive
Sprocket
Adjusting
Plate
Adjusting
Screw
Sprocket
Support
Saw
Chain
Guide
Bar
Adjusting
Hole
Guide Bar
Nuts
Figure 4 - Part Locations For Assembling Guide Bar
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107990
OWNER’S MANUAL
SAW CHAIN
TENSION
ADJUSTMENT
WARNING: Unplug chain saw
from power source before adjusting saw chain tension.
WARNING: Cutting edges on
chain are sharp. Use protective
gloves when handling chain.
WARNING: 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 3, page 6). Also make sure adjusting block is in oval adjusting hole on
guide bar (see Figures 3 and 4, page 6).
2. Turn adjusting screw clockwise until
all slack is out of chain (see Figure 5).
Note:
There should be no gap between
side links of chain and bottom of guide
bar (see Figure 6).
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.
chain will stretch. Check new chain
after first few minutes of operation.
Allow chain to cool down. Readjust
chain tension.
Figure 5 - Turning Adjusting Screw
Guide Bar Nuts
Guide Bar
Gap
Incorrect
Tension
Figure 6 - Saw Chain Adjustment
Note:
A new
Guide Bar
Correct
Tension
FILLING OIL TANK
1. Remove oil cap.
2. Fill oil tank with SAE #30 motor oil.
Note:
For temperatures below 30°F, use
SAE #10 oil. For temperatures above
75°F, 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 after each use to
prevent seepage.
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®
ELECTRIC CHAIN SAW
OPERATING CHAIN
SAW
WARNING: Read and understand this owner’s manual before operating this saw. Make
certain you read and understand
all
Safety Warnings
3. 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 cords with this saw.
Use only extension cords marked for outdoor use. The cord must be marked with
suffix W or W-A following the cord type
designation.
Use proper sized cord with this saw. Cord
must be heavy enough to carry current
needed. An undersized cord will cause voltage drop at saw. Saw will lose power and
overheat. Follow cord size requirements
listed below.
Cord Length AWG Cord Size
Models LNT-2: 076728K, 099178H,
100089-06, & 100089-08; Pole Saw Assy
104317 &106821; Pole Saw 104316-04 (8")
& 106890 (10")
Example:
25 feet 16 AWG
50 feet 16 AWG
100 feet 16 AWG
150 feet 14 AWG
, pages 2 and
SJTW-A or SJTW.
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 7 below.
Extension
Cord
Figure 7 - Tying Extension Cord and
Power Cord in Knot
Chain Saw
Power Cord
OILING CHAIN
Always check oil level before using saw. To
oil chain, press squeeze bulb on oil cap. Do
not attempt to operate the oiler while cutting
with the saw. Oil will feed onto guide bar
and chain. Press squeeze bulb on 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.
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 9).
4. Make sure your footing is firm. Keep
feet apart. Divide your weight evenly
on both feet.
5. When ready to make a cut, press in
switch lockout with right thumb and
squeeze trigger (see Figure 9). This will
turn saw on. Releasing trigger will turn
saw off. Make sure saw is running at
full speed before starting a cut.
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. It will do the job better
and safer at the rate for which it was
intended.
8. Remove saw from a cut with saw running at full speed. Stop saw by releasing trigger. Make sure chain has
stopped before setting saw down.
9. Practice until you can maintain a steady,
even cutting rate.
Cord Length AWG Cord Size
25 feet 16 AWG
50 feet 16 AWG
100 feet 14 AWG
150 feet 12 AWG
Models EL-7: 075762J, 098013J, 099039J,
100089-04, 100089-05, & 100089-07
For more information, visit www.desatech.com
Figure 8 - Pressing Squeeze Bulb on Oil
Cap to Oil Chain
Switch
Lockout
Trigger
Figure 9 - Switch Lockout and Trigger
Location
8
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