Makita DLM431 User Manual
INSTRUCTION MANUAL
MANUEL D'INSTRUCTION
MANUAL DE INSTRUCCIONES
Cordless Lawn Mower
Tondeuse Sans Fil
Cortadora de Cesped
DLM431
IMPORTANT: Read Before Using.
IMPORTANT : Lire avant usage.
IMPORTANTE: Lea antes de usar.
ENGLISH (Original instructions)
SPECIFICATIONS
Model: DLM431
Mowing width (blade diameter) 430 mm (17″)
No load speed 3,600 /min
Dimensions
(L x W x H)
Rated voltage D.C. 36 V
Standard battery cartridge(s)
Warning: Use only the battery cartridge(s) described.
Net weight 18.1 kg (39.8lbs) 18.7 kg (41.2 lbs)
• Due to our continuing program of research and development, the specications herein are subject to change
without notice.
• Specications and battery cartridge may differ from country to country.
• Weight, with battery cartridge, according to EPTA-Procedure 01/2003
IMPORTANT SAFETY
INSTRUCTIONS
WARNING: When using electric lawn mow-
ers, basic safety precautions should always be
followed to reduce the risk of re, electric shock,
and personal injury; including the following.
Read All Instructions
Read, understand, and follow all instructions on the
mower and in the instruction manuals. Be thoroughly
familiar with the controls and the proper use of the
mower before starting.
WARNING!
1. Avoid Dangerous Environment - Never operate
the mower in damp or wet locations. Always be
sure of your footing: keep a rm hold on the han-
dle and walk; never run.
2. Don't Use In Rain.
3. Keep Children Away - All visitors should be kept
a safe distance from work area. Be alert and turn
mower off if a child enters the area. Use extra care
when approaching blind corners, shrubs, trees, or
other objects that may block your view of a child.
4.
Dress Properly - Do not wear loose clothing or
jewelry. They can be caught in moving parts. Use
of rubber gloves and substantial footwear is recommended when working outdoors. Do not operate
the mower when barefoot or wearing open sandals.
5. Use Safety Glasses- Always use face or dust
mask if operation is dusty.
6. Use Right Appliance - Do not use lawn mower for
any job except that for which it is intended.
7. Don't Force Lawn Mower - It will do the job better
and safer at the rate for which it was designed.
8. Don't Overreach - Keep proper footing and
balance at all times. Do not mow near drop offs,
ditches, or embankments. You could lose your
footing or balance.
during operation
when stored
(without grass basket)
Max. 1,490 mm x 460 mm x 1,020 mm (58-3/4″ x 18-1/8″ x 40-1/4″)
Min. 1,450 mm x 460 mm x 950 mm (57″ x 18-1/8″ x 37-1/2″)
490 mm x 460 mm x 910 mm (19-1/4″ x 18-1/8″ x 35-3/4″)
BL1815N/BL1820B BL1830/BL1830B/BL1840B/
9. Stay Alert - Watch what you are doing. Use com-
mon sense. Do not operate lawn mower when you
are tired. Do not operate machine while under the
inuence of alcohol or drugs. A moment of inattention while operating the mower may result in
serious personal injury.
10. Disconnect Lawn Mower - Disconnect the lawn
mower from the power supply or remove the battery when not in use, before servicing, cleaning,
removing material from the lawn mower, or changing accessories such as blades, and the like.
11. Store Idle Lawn Mower Indoors - When not in
use, lawn mower should be stored in an indoor dry
and locked-up place - out of reach of children.
12. Maintain Lawn Mower With Care - Keep cutting
edges sharp and clean for best and safest performance. Follow instructions for lubricating and
changing accessories. Inspect lawn mower cord
periodically and if damaged, have it repaired by
an authorized service facility. Keep handles dry,
clean, and free from oil and grease.
13. Keep machine free of grass, leaves, or other
debris build up.Keep guards in place and in
working order.
14. Keep blades sharp.
15. Keep hands and feet away from cutting area.
Keep clear of the discharge opening at all
times.
16. Objects struck by the lawn mower blade can
cause severe injuries to persons. The lawn
should always be carefully examined and
cleared of all objects prior to each mowing.
Stay behind the handle when the engine
(motor) is running.
17. If the mower strikes a foreign object, follow
these steps:
• Stop the mower. Release the switch. Wait
until the blade comes to a complete stop.
• Remove the key and the battery cartridge.
• Inspect the mower for any damage.
2 ENGLISH
BL1850B/BL1860B
• Repair any damage before restarting and
operating the mower. Replace the blade if it
is damaged in any way.
18. Use identical replacement blades only.
19. This cutting machine is capable of amputating
hands and feet and throwing objects. Failure
to observe the following safety instructions
could result in serious injury or death.
20. Only allow responsible adults, who are familiar
with the instruction, to operate the mower.
21. Be sure the area is clear of other people before
mowing. Stop mower if anyone enters the area.
22. Never direct discharged material toward
anyone. Avoid discharging material against a
wall or obstruction. Material may ricochet back
toward the operator. Stop the blade when crossing
gravel surfaces.
23. Do not pull the mower backwards unless
absolutely necessary. When you are compelled
to back the mower from a fence or other similar
obstruction, look down and behind before and
while moving backwards.
24. Release switch lever and wait for blade
rotation to stop before crossing driveways,
walks, roads and any gravel-covered areas.
Also remove key if you leave it, reach to pick up
or remove something out of your way, or for any
other reason that may distract you from what you
are doing.
25. Do not operate machine without the entire
grass catcher, discharge guard, rear guard, or
other safety protective devices in place and
working.
26. Stop the motor and remove the key whenever
you leave the equipment, before cleaning the
mower or unclogging the chute and making
any repairs or inspections.
27. Shut the motor off and wait until the blade
comes to a complete stop before removing the
grass catcher. Beware that the blades coast after
turn off.
28. Mow only in daylight or good articial light.
29. Disengage the self-propelled mechanism or drive
clutch on the mower so equipped before starting
the motor.
30. If the equipment should start to vibrate unusu-
ally, stop the motor and check immediately
for the cause. Vibration is generally a warning of
trouble.
31. Do not insert key into mower until it is ready to
be used.
32. Don't grasp the exposed cutting blades or
cutting edges when picking up or holding the
appliance.
33. Check the blades carefully for cracks or damage before operation. Replace cracked or
damaged blades immediately.
34. Never attempt to make wheel height adjustments while mower is running.
35. Check the grass basket frequently for wear or
deterioration. For storage, always make sure
the grass basket is empty. Replace a worn grass
basket with a new factory replacement one for
safety.
36. Check grass basket components and the
discharge guard frequently and replace with
manufacturer’s recommended parts, when
necessary.
37. Mow across the face of slopes, never up and
down. Exercise extreme caution when changing direction on slopes. Do not mow excessively steep slopes.
38. Watch for holes, ruts, bumps, rocks, or other
hidden objects. Uneven terrain could cause a slip
and fall accident. Tall grass can hide obstacles.
39. Do not mow on wet grass or excessively steep
slopes. Poor footing could cause a slip and fall
accident.
40. Do not wash with a hose; avoid getting water
in motor and electrical connections.
41. Check the blade mounting bolt at frequent
intervals for proper tightness.
42. Keep all nuts, bolts, and screws tight to
be sure the equipment is in safe working
condition.
43. Never remove or tamper with safety devices.
Check their proper operation regularly. Never
do anything to interfere with the intended
function of a safety device or to reduce the
protection provided by a safety device.
44. Maintain or replace safety and instruction
labels, as necessary.
45. Battery tool use and care
• Recharge only with the charger specied
by the manufacturer. A charger that is
suitable for one type of battery cartridge may
create a risk of re when used with another
battery cartridge.
• Do not charge lawn mower in rain, or in
wet locations.
• When replacing batteries, all batteries
should be replaced at the same time.
Mixing fresh and discharged batteries could
increase internal cell pressure and rupture
the discharged battery.
• Use power tools only with specically
designated battery cartridges. Use of any
other battery cartridges may create a risk of
injury and re.
• When battery cartridge 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 terminals
together may cause burns or a re.
• Under abusive conditions, liquid may be
ejected from the battery; avoid contact.
If contact accidentally occurs, ush with
water. If liquid contacts eyes, additionally
seek medical help. Liquid ejected from the
battery may cause irritation or burns.
SAVE THESE INSTRUCTIONS.
3 ENGLISH
WARNING: Use of this product can create
dust containing chemicals which may cause
respiratory or other illnesses. Some examples of
these chemicals are compounds found in pesticides, insecticides, fertilizers and herbicides.
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 lter out microscopic
particles.
Symbols
The followings show the symbols used for tool.
volts
direct current
no load speed
revolutions or reciprocation per minute
Important safety instructions for
battery cartridge
1. Before using battery cartridge, read all instructions and cautionary markings on (1) battery
charger, (2) battery, and (3) product using
battery.
2. Do not disassemble battery cartridge.
3. If operating time has become excessively
shorter, stop operating immediately. It may
result in a risk of overheating, possible burns
and even an explosion.
4. If electrolyte gets into your eyes, rinse them
out with clear water and seek medical attention right away. It may result in loss of your
eyesight.
5. Do not short the battery cartridge:
(1) Do not touch the terminals with any con-
ductive material.
(2) Avoid storing battery cartridge in a con-
tainer with other metal objects such as
nails, coins, etc.
(3) Do not expose battery cartridge to water
or rain.
A battery short can cause a large current
ow, overheating, possible burns and even a
breakdown.
6. Do not store the tool and battery cartridge in
locations where the temperature may reach or
exceed 50 °C (122 °F).
7. Do not incinerate the battery cartridge even if
it is severely damaged or is completely worn
out. The battery cartridge can explode in a re.
8. Be careful not to drop or strike battery.
9. Do not use a damaged battery.
10. The contained lithium-ion batteries are subject
to the Dangerous Goods Legislation requirements.
For commercial transports e.g. by third parties,
forwarding agents, special requirement on packaging and labeling must be observed.
For preparation of the item being shipped, consulting an expert for hazardous material is required.
Please also observe possibly more detailed
national regulations.
Tape or mask off open contacts and pack up the
battery in such a manner that it cannot move
around in the packaging.
11. Follow your local regulations relating to dis-
posal of battery.
SAVE THESE INSTRUCTIONS.
CAUTION: Only use genuine Makita batteries.
Use of non-genuine Makita batteries, or batteries that
have been altered, may result in the battery bursting
causing res, personal injury and damage. It will
also void the Makita warranty for the Makita tool and
charger.
Tips for maintaining maximum
battery life
1. Charge the battery cartridge before completely
discharged. Always stop tool operation and
charge the battery cartridge when you notice
less tool power.
2. Never recharge a fully charged battery cartridge. Overcharging shortens the battery
service life.
3. Charge the battery cartridge with room temperature at 10 °C - 40 °C (50 °F - 104 °F). Let
a hot battery cartridge cool down before
charging it.
4. Charge the battery cartridge if you do not use
it for a long period (more than six months).
4 ENGLISH
FUNCTIONAL
DESCRIPTION
Installing or removing battery
cartridge
CAUTION: Always switch off the tool before
installing or removing of the battery cartridge.
CAUTION: Make sure that you lock the battery
cover before use. Otherwise, mud, dirt, or water may
cause damage to the product or the battery cartridge.
CAUTION: Always install the battery cartridge
fully until the red indicator cannot be seen. If not,
it may accidentally fall out of the tool, causing injury to
you or someone around you.
CAUTION: Do not install the battery cartridge
forcibly. If the cartridge does not slide in easily, it is
not being inserted correctly.
NOTE: The tool does not work with only one battery
cartridge.
To install the battery cartridge;
1. Slide the battery cover locking lever and open the
battery cover.
1
2
3. Insert the lock key in the place shown in the gure
as far as it will go.
1
► 1. Lock key
4. Close the battery cover and push it until it is
latched with the locking lever.
To remove the battery cartridge from the mower;
1. Slide the battery cover locking lever and open the
battery cover.
2. Pull out the battery cartridge from the mower while
sliding the button on the front of the cartridge.
3. Pull out the lock key.
4. Close the battery cover.
Tool / battery protection system
The tool is equipped with a tool/battery protection system. This system automatically cuts off power to the
motor to extend tool and battery life. The tool will auto-
matically stop during operation if the tool or battery is
placed under one of the following conditions.
► 1. Battery cover 2. Battery cover locking lever
2.
Align the tongue on the battery cartridge with the slot
on the mower then slide the cartridge until it locks in place
with a little click. If you can see the red indicator on the upper
side of the button, battery cartridge is not locked completely.
1
► 1. Battery cartridge
Overload protection
When the tool is operated in a manner that causes it to
draw an abnormally high current, the tool automatically
stops without any indication. In this situation, turn the
tool off and stop the application that caused the tool to
become overloaded. Then turn the tool on to restart.
Overheat protection
When the tool is overheated, the tool stops automatically. Let the tool cool down before turning the tool on
again.
Overdischarge protection
When the battery capacity becomes low, the tool stops
automatically. If the product does not operate even
when the switches are operated, remove the batteries
from the tool and charge the batteries.
5 ENGLISH
Indicating the remaining battery
capacity
1
Indicator lamps Remaining
Lighted Off Blinking
capacity
75% to 100%
50% to 75%
25% to 50%
0% to 25%
2
► 1. Battery indicator 2. Check button
Press the check button to indicate the remaining battery
capacities. The battery indicators correspond to each battery.
Battery indicator status
On
Off
Remaining battery
capacity
50% - 100%
20% - 50%
0% - 20%
Indicating the remaining battery
capacity
Only for battery cartridges with the indicator
Charge the
battery.
The battery
may have
malfunctioned.
NOTE: Depending on the conditions of use and the
ambient temperature, the indication may differ slightly
from the actual capacity.
Switch action
WARNING: Before installing the battery car-
tridge, always check to see that the switch lever
actuates properly and returns to the original position when released. Operating a tool with a switch
that does not actuate properly can lead to loss of
control and serious personal injury.
NOTE: The mower does not start without pressing the
switch button even the switch lever is pulled.
NOTE: Mower may not start due to the overload
when you try to mow long or dense grass at a time.
Increase the mowing height in this case.
This mower is equipped with the interlock switch and
handle switch. If you notice anything unusual with either
of these switches, stop operation immediately and
have them checked by your nearest Makita Authorized
Service Center.
1. Install the battery cartridges. Insert the lock key
into the interlock switch and then close the battery
cover.
1
2
► 1. Indicator lamps 2. Check button
Press the check button on the battery cartridge to indicate the remaining battery capacity. The indicator lamps
light up for few seconds.
21
► 1. Battery cartridge 2. Lock key
6 ENGLISH
2. Press the switch button and hold it.
3. Grab the upper handle and pull the switch lever.
ASSEMBLY
1
► 1. Switch button 2. Switch lever
4. Release the switch button as soon as the motor
starts running. The mower will continue to run until you
release the switch lever.
5. Release the switch lever to stop the motor.
2
Adjusting the mowing height
WARNING: Never put your hand or leg under
the mower body when adjusting the mowing
height.
WARNING: Always make sure that the lever
ts in the groove properly before operation.
The mowing height can be adjusted in the range of
between 20 mm (13/16″) - 75 mm (2-15/16″).
1. Remove the lock key.
2. Pull the mowing height adjusting lever to the
outward of the mower body and move it to your desired
mowing height.
1
WARNING: Always be sure that the lock key
and battery cartridge are removed before carrying
out any work on the mower. Failure to remove the
lock key and the battery cartridge may result in seri-
ous personal injury from accidental start-up.
WARNING: Never start the mower unless it is
completely assembled. Operation of the tools in a
partially assembled state may result in serious per-
sonal injury from accidental start-up.
Installing the battery cover
WARNING: Do not insert the lock key and bat-
tery cartridge before installing the battery cover.
Failure to do so may cause a serious injury.
Install the battery cover completely before the opera-
tion. The battery cover protects the mower and battery
cartridge from mud, dirt, and water.
1. Place the battery cover with the protrusions on the
mower aligned to the holes on the battery cover.
2
1
► 1. Protrusion 2. Hole 3. Battery cover
2. Place your hands in the middle of the battery
cover and push it.
3
► 1. Mowing height adjusting lever
NOTE: The mowing height gures should be used
just as a guideline. Depending on the conditions of
the lawn or the ground, the actual lawn height may
become slightly different from the set height.
NOTE: Try a test mowing of grass in a less conspicu-
ous place to get your desired height.
3. Before the rst operation, check that the pivot
point of the battery cover is attached properly. If the
battery cover is installed correctly, it will not open until
the battery cover locking lever is pulled.
7 ENGLISH
3. Attach the holders to the handle. Position the
power supply cord as shown in the gure.
1
► 1. Pivot point 2. Battery cover locking lever
Installing the handle
NOTICE: When installing handles, position the
cords so that they are not caught by anything
between the handles. If the cord is damaged, the
mower switch may not work.
1. Slide the both ends of lower handle into the
grooves of the mower then fully tighten the clamping
screws.
1
2
► 1. Clamping screw 2. Lower handle
2
► 1. Holder
1
Removing or installing the mower
blade
WARNING: Always remove the lock key and
battery cartridge when removing or installing the
blade. Failure to remove the lock key and battery
cartridge may cause a serious injury.
WARNING: The blade coasts for a few sec-
onds after releasing the switch. Do not start any
operation until the blade comes to a complete
stop.
WARNING: Always wear gloves when han-
dling the blade.
To remove the mower blade, take the following steps.
1. Put the mower on its side so that the mowing
height adjusting lever comes to the upper side.
2. To lock the blade rotation, insert a screwdriver or a
similar tool into a hole on the base of the blade.
3. Turn the bolt counterclockwise with the wrench.
2. Align the screw holes of upper handle and lower
handle. Secure them with the clamping screws and
nuts.
2
2
1
► 1. Clamping nut 2. Clamping screw
NOTE: Hold the upper handle rmly so that it does
not drop off your hand.
1
2
► 1. Mower blade 2. Screwdriver 3. Wrench
4. Remove the bolt, outer ange, mower blade, and
inner ange in order.
8 ENGLISH
3
1
1
2
5
3
4
► 1. Inner ange 2. Rotational direction arrow 3. Outer
ange 4. Bolt 5. Mower blade
To install the mower blade, take the removal procedure
in reverse.
WARNING: Install the blade carefully. It has
a top/bottom facing. Place the blade so that the
rotational direction arrow faces outward.
WARNING: Tighten the bolt clockwise rmly
to secure the blade.
WARNING: Make sure that the blade and all
the xing parts are installed correctly and tightened securely.
WARNING: When you replace the blades,
always follow the instructions provided in this
manual.
Installing the grass basket
1. Remove the lock key.
2. Lift the rear guard of the mower body.
2
3
► 1. Hook 2. Groove 3. Grass basket
OPERATION
Mowing
WARNING: Before mowing, clear away sticks
and stones from mowing area. Furthermore, clear
away any weeds from mowing area in advance.
WARNING: Always wear the safety goggles or
safety glasses with side shields when operating
the mower.
3. Hook the grass basket on the groove of the mower
body as shown in the gure.
Firmly hold the lawn mower handle with both hands
when mowing.
The outside edges of the front wheels is the guideline
for mowing width. Using the two front wheel outside
edges as a guideline, mow in strips, overlapping by
one half to one third the previous strip, to mow the lawn
evenly.
Periodically check the grass basket for mowed grass.
Empty the grass before it becomes full. Before every
periodical check, be sure to stop the mower then
remove the lock key and the battery cartridge.
NOTE: Using the mower with the grass basket full
prevents smooth blade rotation and places an extra
load on the motor, which may cause breakdown.
9 ENGLISH
Mowing a long-grass lawn
Do not try to cut long grass all in one go. Instead, mow
the lawn in some steps. Leave a day or two between
mows until the lawn becomes evenly short.
NOTE: Mowing long grass to a short length all in one
go may cause the grass to die. The cut grass may
also block up inside of the mower body.
Emptying the grass basket
WARNING: To reduce a risk of accident, reg-
ularly check the grass basket for any damage or
weakened strength. Replace the grass basket if
necessary.
1. Release the switch lever.
2. Remove the lock key.
3. Lift the rear guard and take out the grass basket
by holding the handle.
1
Maintenance
1. Remove the lock key. Store it in a safe place out of
the reach of children.
2. Clean the mower using only a wet cloth. Do not
spray or pour water on the mower when cleaning.
3. Put the mower on its side and clean grass clip-
pings accumulated on the underside of mower deck.
4. Check all nuts, bolts, knobs, screws, fasteners etc.
for tightness.
5. Inspect moving parts for damage, breakage, and
wear. Damaged or missing parts should be repaired or
replaced.
Storage
WARNING: When carrying or storing the
mower, do not hold the folded handles but the
front grip of the mower. Holding the folded handles
may cause a serious injury or damage to the mower.
Before storing the mower, remove the battery cartridge
from it.
Store mower indoors in a cool, dry and locked place.
Don't store the mower and charger in locations where
the temperature may reach or exceed 40 °C (104 °F).
2
► 1. Rear guard 2. Handle
4. Empty the grass basket.
MAINTENANCE &
STORAGE
WARNING: Always be sure that the lock
key and battery cartridge are removed from the
mower before storage or attempting to perform
inspection or maintenance.
WARNING: Always remove the lock key when
the mower is not in use. Store the lock key in a
safe place out of reach of children.
WARNING: Wear gloves when performing
inspection or maintenance.
NOTICE: Never use gasoline, benzine, thinner,
alcohol or the like. Discoloration, deformation or
cracks may result.
1
► 1. Front grip 2. Rear grip
1. Loosen the clamping screws and expand the
lower handle to both sides. Move down the handle for-
ward. At this time, keep a rm grip on the lower handle
so that the handle does not fall down to the far side from
the mower body.
2
2
1
► 1. Clamping screw 2. Lower handle
10 ENGLISH
2. Loosen the clamping nuts and pivot the upper
handle back while expanding the both sides.
2
1
► 1. Clamping nut 2. Upper handle
3. Store the grass basket between the handle and
the mower body.
► 1. Grass basket
NOTE: When putting the mower in the upright posi-
tion, do not hold the handle but use the front grip of
the mower.
To maintain product SAFETY and RELIABILITY,
1
repairs, any other maintenance or adjustment should
be performed by Makita Authorized or Factory Service
Centers, always using Makita replacement parts.
TROUBLESHOOTING
Before asking for repairs, conduct your own inspection rst. If you nd a problem that is not explained in the manual,
do not attempt to dismantle the tool. Instead, ask Makita Authorized Service Centers, always using Makita replace-
ment parts for repairs.
State of abnormality Probable cause (malfunction) Remedy
Mower does not start. Two battery cartridges are not installed. Install the charged battery cartridges.
Battery problem (under voltage) Recharge the battery cartridge. If recharging is not
The lock key is not inserted. Insert the lock key.
Motor stops running after a little use. Battery's charge level is low. Recharge the battery cartridge. If recharging is not
Cutting height is too low. Raise the cutting height.
Motor does not reach maximum
RPM.
Cutting tool does not rotate:
stop the mower immediately!
Abnormal vibration:
stop the mower immediately!
Battery cartridge is installed improperly. Install the battery cartridge as described in this
Battery power is dropping. Recharge the battery cartridge. If recharging is not
The drive system does not work
correctly.
Foreign object such as a branch is
jammed near the blade.
The drive system does not work
correctly.
Blade is imbalanced, excessively or
unevenly worn.
effective, replace battery cartridge.
effective, replace battery cartridge.
manual.
effective, replace battery cartridge.
Ask your local authorized service center for repair.
Remove the foreign object.
Ask your local authorized service center for repair.
Replace the blade.
11 ENGLISH
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