Makita 5012B User manual

Chain Saw
300 mm (11-3/4") MODEL 5012B
Guide bar Chain speed
1FPMl length
INSTRUCTION MANUAL
weight
Overall
length
Saw chain
Pitch Gauge
DOUBLE
INSULATION
300 mm
11 1-314")
5,500
SPEC IF1 CAT I ON S
318"
0.050"
560 mm 4.3 kg
(9.5 mm)
11.27 mm)
122") 19.5 Ibs)
* Manufacturer reserves the right to change specifications without notice.
* Note: Specifications may differ from country to country.

IMPORTANT
SAFETY INSTRUCTIONS
WARNING: WHEN USING AN ELECTRICCHAIN SAW, BASIC
SAFETY PRECAUTIONS SHOULD ALWAYS BE FOLLOWED TO
REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, AND INJURY
TO PERSONS, INCLUDING THE FOLLOWING:
READ ALL INSTRUCTIONS.
1. Keep Work Area Clean
Clutteredareas invite injuries. Do notstartcutting
until you have a clear work
area, secure footing, and a planned retreat path from the falling tree.
Use extreme caution when cutting small size brush and saplings because
the slender material may catch the saw chain and be whipped toward you
or pull you off balance. Do not operate a chain saw
in a tree unlessspecifi-
cally trainedtodo
so. When cutting a limb that is under tension be alert for
spring back
so that you will not be struck when the tension in the wood
fibers is released. Don‘t expose chain saw to rain. Don’t use chain saw in
damp or wet locations. Do not use chain saw
in presence of flammable
liquids or gases.
Prevent body contact with groundedsurfaces. For example: metalpipes, wire
fences.
Do not let visitors contact chain saw or extension cord. All visitors should
be kept away from work area.
When not
in use, chain saws should be stored ina dry, and high or locked-
up place
- out of the reach of children. When storing saw, use a scabbard
or carrying case.
It will do the job better and safer at the rate for which it was intended.
Cut woodonly. Don’t usechain saw for purpose notintended
- for example
- Don’t use chain saw for cutting plastic, masonry non-wood building
materials.
Donot wear loose clothing or jewelry. They can get caught inmoving parts.
Rubber gloves and non-skid footwear are recommended when working
outdoors. Wear protective hair covering to contain long hair.
2. Consider Work Area Environment
3. Guard Against Electric Shock
4. Keep Children Away
5. Store Idle Chain Saw
6. Don’t Force Chain Saw
7. Use Right Tool
8. Dress Properly
2

9.
IO.
11.
12.
13.
14.
15.
16.
Use Safety Glasses
Also use safety footwear; snug fitting clothing; protective gloves; hearing
and head protection.
Carrying Saw
Carry the chain saw by the front handle
with the saw stopped, finger off
the switch, the guide bar and saw chain to the rear.
Maintain Chain Saw With Care
Inspect chain saw cords periodically and if damaged, have repaired by
authorized service facility. Keep cord clear of the chain and operator at all
times. Never carry saw bythe cord or pull
it todisconnectfrom receptacle.
Keep cordfrom oiland sharp edges. Inspectextension cords periodically and
replace
if damaged. Keeptools sharp and clean for better and safer perfor-
mance. Follow instructions for lubricating and changing accessories. Keep
handles dry, clean, and free from oil and grease.
Disconnect Chain Saw
Disconnect chain saw when not
in use. beforeservicing, and when changing
accessories and attachments, such as saw chain and guard.
Outdoor Use Extension Cords
Use only extension cords intended for use outdoors and
so marked.
Stay Alert
Watch what you are doing. Use common sense.
Do not operate chain saw
whenyouaretired. Keepall partsof the bodyaway fromthe saw chain when
the motor is operating. Before you start the saw, make sure the saw chain
is not contacting anything.
Check Damaged Parts
Before further use of the chain saw, a guard or other part that is damaged
should be carefully checked to determine that
it will operate properly and
perform itsintended function. Check for alignment of movingparts, binding
of movingparts, breakage of parts, mounting, andany other conditionsthat
may affect its operation. A guard or other part that is damaged should be
properly repaired or replaced by an authorized service center unless other-
wise indicatedelsewhere
in thisinstruction manual. Havedefective switches
replaced by authorized service center.
Do not use chain saw if switch does
notturn
it onand off. Do notoperate a chain saw that isdamaged, improperly
adjusted, or isnot completely and securely assembled. Be sure that the saw
chain stops moving when the trigger is released.
Guard Against 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, kickingthe guide bar up and back towards the operator. Pinching
the saw chain along the top of the guide bar may pushthe guide bar rapidly
back towards the operator. Either of these reactions may cause youto lose
control of the saw which couldresult
in serious injury touser. The following
precautions should be followed to minimize kickback.
3

(1) Grip saw firmly. Hold the chain saw firmly with both hands when the
motoris running. Usea firm grip withthumbs and fingers encircling the
chain saw handles.
(2) Do not over reach.
(3) Keep proper footing and balance at all times.
(4) Don't letthe nose of the guide bar contact a log, branch, ground, or other
(5) Don't cut above shoulder height.
(6) Use devices such as low kickback chain and special guide bars that
(7) Only use replacement bars and chains specified by the manufacturer.
Connect chain saw to correct voltage, that is, be sure that the voltage
supplied is the same as that specified on the nameplate of the tool.
When servicing use only identical replacement parts.
obstruction.
reduce the risks associated with kickback.
17. Power Supply
18. Replacement Parts
19. Wear ear protectors during operation.
20. Before making a felling cut, remove dirt, stones, loose bark, nails, staples
21. Secure the log so that it will not roll or move suddenly during operation.
22. AVOID UNINTENTIONALSTARTING. Don't carry plugged-intool with finger
23. Attention! Do not expose this tool to rain and pull plug immediately if the
24. The chainsaw mustnotbe leftoutdoors duringrain and it must not beused
and wire from the tree.
on switch. Be sure switch is
OFF when plugging in.
supply cable be damaged or cut.
when wet.
VOLTAGE WARNING: Before connecting the tool toa power source (receptacle,
outlet, etc.) be sure the voltage supplied is the same as that specified on the
nameplate of the tool.
A power source with voltage greater than that specified
for the tool can result
in SERIOUS INJURY tothe user - as well as damage to
the tool.
If in doubt, DO NOT PLUG IN THE TOOL. Using a power source with
voltage less than the nameplate rating is harmful to the motor.
4

Use Of Extension Cord
If the extension cord is intended to be used outdoors, the cord shall be marked
withthe suffix
W-A following the cord type designation, for example - SJTW-
A.
to indicate it is acceptable for outdoor use. Use an extension cord heavy
enough tocarry the current the tool will draw. Undersizecord will cause a drop
inline voltage resulting in
loss of powerand over-heating. Make sure the exten-
sion cord is in good condition before using. Keep the cord away from the cut-
ting area and
to position cord so that it will not be caught on branches, and the
like, during cutting. Use the table below to determine the proper wire size re-
quired in the extension cord.
Ampere rating
(on nameplate)
0 - 5.0 5.1 - 10.0 10.1 - 13.0 13.1 - 15.0
I Ext. Cord Length I Wire Size (American Wire Gauge)
25 Ft.
50 Ft.
75 Ft.
125 Ft.
150 Ft.
100 Ft.
18 18 16 14
18 16 16 14
18 16 14 14
16 14 12 12
16 12 12 12
16 12 12
-
Contact Makita Authorized or Factory Service Center if a proper extension cord
cannot be found.
SAVE THESE INSTRUCTIONS.
5

Chain Saw Nomenclature
LEFT SIDE
Front handle Manual oiler control
I
Trigger switch
SIDE
Oil cap Guide bar nose
Guide bar
Sprocket mounting pad
Fig. 1
Bucking - The process of cross cutting a felled tree or log into lengths.
Chain Saw Powerhead
- A chain saw without the saw chain and guide bar.
Sprocket
- The toothed part that drives the saw chain.
Felling
- The process of cutting down a tree.
Felling Back Cut
- The final cut in atree fellingoperation made onthe opposite
side of the tree from the notching undercut.
Front Handle
- The support handle located at the front of the chain saw.
Front Handle Guard
- A structural barrier between the front handle of a chain
saw and the guide bar, typically located close tothe hand position on the front
handle.
Guide Bar
- A solid railed structure that supports and guides the saw chain.
6

Kickback - The backward or upward motion, or both of the guide bar occurring
when the saw chain nearthe nose of the top area of the guide bar contacts any
objectsuch as a logor branch, or whenthe wood closes inand pinchesthe saw
chain in the cut.
Kickback, Pinch
- The rapid pushback of the saw which can occur when the
wood closes
in and pinches the moving saw chain in the cut along the top of
the guide bar.
Kickback, Rotational
- The rapidupwardand backwardmotionof the saw which
can occur when the moving saw chain near the upper portion of the tip of the
guide bar contacts an object, such as a log or branch.
Low-Kickback Chain
- A chain that complies with the kickback performance
requirements of
ANSI B175.1 when tested on a representative sample of chain
saws.
Normal Cutting Position
- Those positions assumed in performing the bucking
and felling cuts.
Notching Undercut
- A notch cut in a tree that directs the tree's fall.
Oiler Control
- A system for oiling the guide bar and saw chain.
Rear Handle
- The support handle located at the rear of the saw.
Reduced Kickback Guide Bar
- A guide bar which has been demonstrated to
reduce kickback significantly.
ReplacementSaw Chain
- A chain that complieswiththe kickbackperformance
requirementsof ANSI 8175.1 when tested
with specific chain saws. It may not
meet the
ANSI performance requirements when used with other saws.
Saw Chain
- A loop of chain having cutting teeth, that cutthe wood, and that
is driven by the motor and is supported by the guide bar.
Spiked Bumper (Spike)
- The pointed tooth or teeth for use when felling or
bucking to pivot the saw and maintain position while sawing.
Switch
- A device that when operated will complete or interrupt an electrical
power circuit to the motor of the chain saw.
Lock-Off Button
- A movable stop that prevents the unintentional operation of
the switch until manually actuated.
7

Installingsaw chain and guide bar
CAUTION :
Always be sure that the tool is switched off and unpluggedbefore installingsaw chain and
guide bar.
Use the socket wrench to toosen the hex
bolt holding the chain cover. Remove the
chain cover.
I
Fig. 2
Fit one end of the chain over the sprocket and the other over the end of the guide bar.
Notice that the cutters must be in the direction of the arrow in Fig.
3 and 4. Keep the
chain in the guide bar grooves.
Install the guide bar
so that the lower hole in the guide bar is just over the adjusting pin.
Install the chain cover and tighten the hex bolt only tight enough to hold the guide bar
temporarily.
Adjusting saw chain tension
CAUTION :
Always be sure that the tool is switched off and unplugged before adjustingchain tension.
Grasp the chain in the middle of the guide
bar and lift up. The gap between the side
link of the chain and the guide bar should
be about
3 mmto 4 mm (1/8” - 5/32”).
Fig. 5
8

If the gap is not about 3 mm to 4 mm
(1/8" - 5/32"), adjust the chain tension.
Use
a screwdriver to turn the chain tension
adjustingscrew clockwise for more tension,
or counterclockwise for less tension. When
adjusting the chain tension, lift the end
of
the guide bar slightly.
After adjusting the chain tension, use the
socket wrench to tighten the hex bolt
sew re1 y .
I I
Fig. 6
I
1 I
Fig. 7
CAUTION :
When breakingin a new chain, adjust the tension often, since ittends to 'stretch'.
Hook
When using an extension cord, secure it to
the tool's cord with the hook provided.
Attach the hook about 100-200 mm
(4"-
8") from the extension cord connector.
This will help prevent unintentional dis-
connection.
Power cord
I
1 Cord connector
I
Extension cord
I I
Fig. 8
9

Switchaction
To prevent the trigger from being acciden-
tally pulled,
a lock-off button is provided
as a safety feature.
To start the tool, press in the lock-off
button and pull the trigger.
Release the
trigger to stop.
Trigger switch
I
Fig.
CAUTION:
Before plugging in the tool, always check to
see that the trigger switch actuates properly
and returnsto the "OFF" position when released.
Lubrication
Turn the tool on and then depress the oil
button
4 or 5 times. Let the oil get around
the bar groove and penetrate before cut-
ting. For continuous operation, lubricate
the tool for every log having
a diameter of
about 200"
(8') by depressing the
button
4 or 5 times. For greater thickness,
depress the button several times
at some
point inthe cutting.
I I
Insufficient oiling will cause wear on the rivets, rough chaintravel and high chain tension.
Use in such conditionswill put
a great load on the motor, and the overload protector may
cut out. Unplug the saw and pump the oil plunger
5 or 6 times while running the saw
chain around by hand. After enough lubrication, resume sawing operations.
Fig. 11
10