Cobra RM4140V User manual

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MODEL: RM4140V (DYM101701)
COBRA LAWN MOWER
OWNER’S MANUAL
WARNING!
When using the machine the safety rules must be followed. For your own safety and bystanders please read these
instructions before operating the machine. Please keep the instructions safe forlateruse.
Cobra Garden Machinery
Henton and Chattell Ltd., London Road, Nottingham NG2 3HW UK
www.cobragarden.co.uk

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CONTENT
SECTION 1 SYMBOLS MARKED ON THE PRODUCT ……………..………….……….3
SECTION 2 GENERAL SAFETY RULES……………… ……………..………….……….4-7
SECTION 3 GENERAL IDENTIFICATION ..........…………………………………………7
SECTION 4 TECHNICAL DATA ............................ ………………………………………..7-8
SECTION 5 ASSEMBLY ....................................... ………………………………………..8-12
SECTION 6 ADJUSTMENT OF CUTTING HEIGHT …………………………………..12
SECTION 7 SAFETY PRECAUTIONS ................………………………………………..13
SECTION 8 STARTING…………………………………………………….…………………13-15
SECTION 9 BLADE…………………………………………………………………………….15
SECTION 10 MAINTENANCE AND CARE…………………………………………………..16
SECTION 11TROUBLESHOOTING…………………………………………………………..16
SECTION 12 ENVIRONMENTALLY FRIENDLY DISPOSAL ……….………………....17
SECTION 13 WARRANTY ...................................……….……………….......................17
SECTION 14 EC-DECLARATION OF CONFORMITY ……………………………………18

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KNOW YOUR LAWN MOWER
Read this manual carefully, observing the recommended safety instructions before, during and after using your
lawn mower. Following these simple instructions will also maintain your lawn mower in good working order.
Familiarize yourself with the controls on your mower before attempting to operate it, but above all, be sure you
know how to stop your mower in an emergency. Retain this user manual and all other literature with your mower
for future reference.
1. SYMBOLS MARKED ON THE PRODUCT
Read this instruction book carefully before using the lawn mowerand keep it
in a safe place for future reference.
Keep bystanders away.
Beware of sharp blades. Blades continue to rotate after the motor is switched off.
Switch off isolator key before adjusting, cleaning and before leaving the
product unattended for any period.
The charger is intended for indoor use only.
Wear eye and ear protection.
The machine is protected against ingress of water drops from a vertical
direction
Do not expose to rain or damp conditions.
Do not operate on inclines greater than 15. Mow across the face of slopes,
never up and down.

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Battery Disposal:
Old Accumulators and batteries must not be added to household waste, but should be disposed of in
accordance with the applicable legislation.
- Take unusable rechargeable batteries to the dealer’s or community’s battery collection point.
Disposing of the packaging:
The packaging is made of cardboard and separately labeled foil which is also recyclable.
- Take these materials to a recycling centre.
Disposing of the packaging:
The packaging is made of cardboard and separately labeled foil which is also recyclable.
- Take these materials to a recycling centre.
Battery packs/batteries: Li-lon
Do not dispose of batteries into household waste, water or fire. Battery packs/batteries must be
collected, recycled or disposed of in an environmentally -friendly way.
Only for EC countries:
Defective or dead batteries must be recycled according to the directive 91/157/EC
SAFETY ALERT SYMBOL:
Indicates caution or warning may be used in conjunction with other symbols or pictures.
2. GENERAL SAFETY RULES
The purpose of the safety rules is to attract your attention to possible dangers. The safety symbols and the
explanations with them, require your careful attention and understanding. The safety warnings do not by
themselves eliminate any danger.The instruction or warnings they give are not substitutes for proper accident
prevention measures.
WARNING: Failure to follow a safety warning can result in serious injury to yourself or to others. Always
follow the safety precautions to reduce the risk of fire, electric shock and personal injury. Save owners
manual and review frequently for continuing safe operation and instructing others who may use this tool.
WARNING: This machine produces an electromagnetic field during operation. This field may under
some circumstances interfere with active or passive medical implants. To reduce the risk of serious or fatal
injury, we recommend persons with medical implants to consult their physician and the medical implant
manufacturer before operating this machine.
WARNING: The operation of any tool can result in foreign objects being thrown into your eyes, which can
result in eyes severely damaged. Before beginning power tool operation, always wears safety goggles or
safety glasses with side shields and a full face shield when needed. We recommend wide vision safety masks for
use over eyeglasses or standard safety glasses with side shield.
CE Marking
The product meets demands and regulations set by the European Community.
WEEE Marking
CAUTION! Unusable power tools do not belong with domestic waste. They must be
taken to a communal collecting point for environmentally friendly disposal in accordance
with local regulations.
Noise level marking.
Your tool noise is not more than 92dB.

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IMPORTANT
READ CAREFULLY BEFORE USE.
KEEP FOR FUTURE REFERENCE.
1) Read the instructions carefully. Be familiar with the controls and the proper use of the equipment.
2) Never allow children or people unfamiliar with these instructions to use the lawnmower. Local regulations can
restrict the age of the operator
3) Never mow while people, especially children, or pets are nearby.
4) Keep in mind that the operator or user is responsible for accidents or hazards occurring to other people or their
property.
5) While mowing, always wear substantial footwear and long trousers. Do not operate the equipment when
barefoot or wearing open sandals;Avoid wearing clothing that is loose fitting or that has hanging cords or ties.
6) Thoroughly inspect the area where the equipment is to be used and remove all objects which can be thrown by
the machine.
7) Before using, always visually inspect to see that the blades, blade bolts and cutter assembly are not worn or
damaged. Replace worn or damaged blades and bolts in sets to preserve balance. Replace damaged or
unreadable labels.
9) Mow only in daylight or in good artificial light.
10)Avoid operating the equipment in wet grass, where feasible.
11)Always be sure of your footing on slopes.
12) Walk, never run.
13) For rotary mowers; mow across the face of slopes, never up and down.
14) Exercise extreme caution when changing direction on slopes.
15) Do not mow excessively steep slopes.
16) Use extreme caution when reversing or pulling the lawnmower towards you.
17) Stop the blades if the lawn mower has to be tilted for transportation when crossing surfaces other than grass,
and when transporting the lawn mower to and from the area to be mowed.
18) Never operate the lawnmower with defective guards, or without safety devices, for example deflectors and/or
grass catchers, in place.
19) Start or switch on the motor carefully according to instructions and with feet well away from the blades.
20) Do not tilt the lawnmower when starting switching on the motor, except if the lawnmower has to be tilted for
starting. In this case, do not tilt it more than absolutely necessary and lift only the part which is away from the
operator.
21) Do not start the motor when standing in front of the discharge chute.
22) Do not put hands or feet near or under rotating parts. Keep clear of the discharge opening at all times.
23) Never pick up or carrya lawnmower while the motor is running.
24) Stop the motor and switch off the isolator key. Make sure that all moving parts have come to a complete stop.
-whenever you leave the machine
- before clearing blockages or unclogging chute
- before checking, cleaning or working on the lawnmower
- after striking a foreign abject. Inspect the lawnmower for damage and make repairs before restarting and
operating the lawnmower
If the lawnmower starts to vibrate abnormally (check immediately)
- inspect for damage
- replace or repair any damage parts.
- check for and tighten any loose parts.
25) Stop the mower, whenever you leave the lawnmower
26) Keep all nuts, blots and screws tight to be sure the equipment is in safe working condition.

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27) Check the grass catcher frequently for wear or deterioration.
28) Replace worn or damaged parts for safety.
29) Children are not allowed to use the machine.
30) This appliance is not intended for use by persons with reduced physical, sensory ormental capabilities, or lack
of experience and knowledge,unless they have been given supervision or instruction concerning use of the
appliance by a person responsible for their safety.
31) Be careful during adjustment of the machine to prevententrapment of the fingers between moving blades and
fixed parts of the machine.
32)Always allow the machine to cool before storing.
33)After use and before storage, remove the battery from the machine and check for damage.
34) When servicing the blades be aware that, even though the power source is switched off, the blades can still be
moved.
35) Replace worn or damaged parts for safety; Use only genuine replacement parts and accessories.
37)Recharge only with the charger specified by the manufacture .Using a charge with an incompatible battery
pack may create a risk of fire.
38)Use power tools only with specifically designated battery packs .Use of any other battery packs may create a
risk of injury and fire.
39When battery pack is not in use, keep it away from other metal objects like, paper clips ,coin, keys, nails, screws,
or othersmall metal objects, that can make a connection from one terminal to another. Shorting the battery
terminals together may cause burns or a fire.
40) If the battery is damaged, liquid may be ejected from the battery:
-If contact accidentally occurs, flush with water.
-If liquid contacts eyes seek medical help immediately. Liquid ejected from the battery may cause irritation or
burns.
Safety Advice for Rechargeable Battery and Charger
Use only the battery provided with the lawn mower and the provided charger.
Protect the battery and the battery charger from humidity and damp conditions.
Do not operate the battery charger outdoors.
When it is not in use or before cleaning and servicing, disconnect the battery charger from the power supply.
Take special care of the battery. Avoid dropping it onto any hard surface and do not subject it to pressure or
any other form of mechanical stress. Keep the battery away from extreme heat and cold.
Do not open or attempt to repair the battery or the battery charger. If any parts are defective, have them
repaired by a qualified technician or send them to our service department for repair.
Only charge the battery at an ambient (surrounding air) temperature between 0ºC and +40ºC.
A charged battery can be used to power the machine under ambient temperature conditions between -20 ºC
and +40 ºC. When not in use, store the battery in a dry place between 10ºC and 30ºC.
Recharge the battery as soon as the mower’s performance starts to decline. DO NOT CONTINUE using
product with its battery in a depleted condition. The battery is not fully charged at the factory. Before
attempting to use it, it must be fully charged firstly.
Important! Danger!
Never short-circuit the battery or expose it to moisture. Do not store it together with any metal parts which
could short-circuit the contacts. The battery could overheat, start burning or explode. If any person comes into
contact with acid or similar internal fluids or substances contained in the battery, wash off these substances
immediately with plenty of water. If these substances make contact with the eyes, rinse with plenty of water
and visit a doctor immediately.

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WARNING!
Do not dismantle the battery pack to get the battery cells out by yourself.
Do not place the rechargeable battery into fire or water. It can explode. The Rechargeable Battery should not
be discarded to domestic refuse, regardless of whether used or unused. You should return it to a local battery
collection point in accordance with Battery Regulations or return them to us suitably marked “Used Battery”.
3. GENERAL IDENTIFICATION
Fig.1
1. On-off button 2. Lock off button 3. Switch box 4. Locking knob
5. Cable clamp 6. Grass catcher 7. Height adj. lever 8. Wheel cover
9. Battery door 10. Rear cover 11. Lower handle 12.Upper handle
13.LED display
4. TECHNICAL DATA
Model:
RM4140V / DYM101701
Rated Voltage:
40V d.c.
Rated Power:
550W
No Load Speed:
3100min-1
Grass catcher capacity
50L
Cutting Width:
410mm
Net weight:
23.0kg
Height adjustment :
17-75mm,6adjustment
RM4140V / DYM101701
Sound pressure level at the
operator’s position
79.9dB(A) K=3 dB(A)
Measured sound power
level
90.1dB(A) K=2.07dB(A)
Guaranteed Sound Power
level
96dB(A)
Vibration
max.1.29m/s² K=1.5
m/s²

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Battery
Lithium-ion
Model number
DYMA72E
Rated voltage
40Vdc
Capacity
144Wh
Number of battery cells
20pcs
Battery charger
Model number
A72E
Input
220-240VAC,50Hz,1A
Output
40Vdc,2A
Charging temp. range
0 - 40℃
5. ASSEMBLY
5.1 ASSEMBLY THE FOLDING HANDLE
A) Fix the lower handlebars into the unit body with locking knobs, bolts and washers as Fig. 2A,/Fig.2B/Fig.2C shown.
B) Release the upper handlebars for folding. Connect the upper handle and the lower handle with locking knobs, bolts and
washers. (Fig.2D)
C) Attach these to the position shown and then attaches the cable.(Fig.2E)
Fig.2A Fig. 2B Fig. 2C
Fig.2D Fig.2E
5.2 ASSEMBLY OF THE GRASS CATCHER
Assemble the handle into the grass catcher (Fig.3A/3B/3C)
Insert one end with a projection into the grass catcher, and then fix the other end of the handle onto the grass
catcher with the screw ST4.8*19.
1. To fit: Raise the rear cover and hitch the grass catcher on the rear of the mower. (Fig.3D/Fig.3E/Fig.3F)
2. To remove: grasp and lift the rear cover, remove the grass catcher.
There is a level indicator on the top of the grass catcher that shows whether the catcher is empty or full:
- The level indicator inflates if the catcher is not full during mowing. (Fig. 3G)
- If the catcher is full, the indicator collapses; once this happens stop mowing immediately and empty the
catcher, make sure it is clean and ensure its meshwork is ventilated. (Fig. 3H)

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IMPORTANT:
If the position of indicator opening is very dirty, the indicator will not inflate-in this case, clean the position of
indicator opening immediately.
Fig.3A Fig.3B
Fig.3C Fig.3D
Fig.3E Fig.3F

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Fig.3G Fig.3H
5.3 INSTALLING THE ISOLATOR KEY
1. Press the button (1) and lift the battery door.(2) (Fig.4A)
2. Insert the isolator key into the slot.（Fig. 4B）
Fig.4A
Fig.4B
5.4 INSTALLING THE BATTERY
1.Open the battery door.
2. Make sure the isolator key is switch off. Switch mark ”1”is ON”, “0”is “OFF”. (Fig. 5A)
3. Insert the battery pack into battery holder.(Fig. 5B/Fig.5C)
4. Make sure the latch on bottom of battery pack snaps in place and that battery pack is fully seated.
(Fig. 5B/Fig.5C)
5. Close the battery door. (Fig. 5B/Fig.5C /Fig. 5D)

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Fig.5A
Fig. 5B Fig. 5C Fig. 5D
5.5 REMOVE THE BATTERY (Fig.6A/Fig.6B)
1. Lift and hold up the battery door
2. Press and hold the battery latch button (1) at the bottom of the battery pack.
3. Remove battery pack from the product.
Fig.6A Fig.6B
5.6 ADJUSTING THE HANDLE HEIGHT
1. Back out the locking knobs which fixed the lower handle. (Fig.7A/Fig.7B)
2. Refer to Fit.7C, move the lower handle up and down, adjust it to the proper height. There is 3 adjusting
heights to choose on this lawn mower; at 1 height, lower handle to the ground is highest, 3 height is the lowest.
3. Adjust to the required height, then fix the lower handle by the locking knobs.
1

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WARNING: The left side and right side of lower handle must adjust to the same height.
Fig.7A Fig.7B
Fig.7C
6. ADJUSTMENT OF THE CUTTING HEIGHT
Apply outward pressure to disengage lever from the rack. Move the lever forward or back to adjust the height.
The height (the blade to the ground) can be adjusted from 17mm (position 1) to 75mm (position 6), 6 height
positions.
Fig.8APosition 6 Fig.8B Position 1
WARNING: Make this adjustment only when the blade is stopped.
WARNING: Disconnect the electric cord from the power supply.
1
2
3

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7. SAFETY PRECAUTIONS
a)Always operate with the deflector or grass catcher in the correct position.
b)Always stop the motor before removing the grass catcher or adjusting the height of cut position.
c) Before mowing, remove all foreign objects from the lawn which may be thrown by the machine. While
mowing, stay alert for any foreign objects which may have been missed. （Fig.9A）
d) Never lift the rear of the mower while starting the motor or during normal operation. （Fig.9B）
e) Never place your hands or feel underneath the mower body or into the rear discharge chute while the motor is
running. （Fig.9C）
Fig.9A
Fig.9B
Fig.9C
8. OPERATING INSTRUCTIONS
8.1. STARTING
Switch on the isolator key
Start the motor as follows

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a) Press the safety push-button (1).
b)And meanwhile, press any switch button (There are four buttons) (2), and keep it in grasp. Release button (1)
Lift the front of the machine and switch off isolator key while crossing gravel or roads surface.
If you release the switch button (A,B,C,D), the motor will stop.
Fig.10
CAUTION! The blade starts turning as soon as the motor is started.
WARNING! The cutting blade continues to rotate after the motor is switch off.
8.2 LED INDICATOR
Please refer to the following table for the meaning of LED display.
Lawn mower status
Battery pack capacity
indicator status(Press
“POWER”button（1）)
Abnormal situation
indicator status
Green light（2）
Red light（3）
The battery pack capacity is
between 75%~100%.
Four LEDs ON
N/A
The battery pack capacity is
between 50%~75%.
Three LEDs ON
N/A
The battery pack capacity is
between 25%~50%.
Two LEDs ON
N/A
The battery pack capacity is
between 0%~25%.
One LED ON
N/A
Motor blocked
N/A
ON
The battery pack is low voltage
N/A
Flashing Twice
Overheat of motor controller
N/A
Flashing Frequently
Fig.11
1
2
3

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8.3 FOR THE BEST RESULTS WHEN MOWING
Clear the lawn of debris. Be sure that the lawn is clear of stones, sticks, wire or other foreign objects, which
could be accidentally be thrown out by the mower in any direction and cause serious personal injury to the
operator and others as well as damage to property and surrounding objects. Do not cut wet grass. For
effective mowing do not cut wet grass, because it tends to stick to the underside of the deck preventing
proper collection of the grass clippings. Cut no more than 1/3 the length of the grass. The recommended cut
for mowing is 1/3 the length of the grass. Ground speed will need to be adjusted, so the clippings can be
dispersed evenly into the lawn. For especially heavy cutting in thick grass it may be necessary to use one of
the slowest speeds in order to get a clean well mowed cut. When mowing long grass you may have to cut the
lawn in two passes, lowering the blade another 1/3 of the length for the second cut and perhaps cutting in a
different pattern than was used the first time. Overlapping the cut a little on each pass will also help to clean
up any stray clippings left on the lawn. Clean the underside of deck. Be certain to clean the underside of the
cutting deck after each use to avoid a build-up of grass, which would prevent proper mulching. Always
remove the starter isolator before cleaning. Mowing leaves. The mowing of leaves can also be beneficial to
your lawn. When mowing leaves make sure they are dry and are not laying too thick on the lawn. Do not wait
for all the leaves to be off the trees before you mow.
WARNING: if you strike a foreign object, stop the motor. Switch off the isolator key, thoroughly inspect
the mower for any damage and repair the damage before restarting and operating the mower. Extensive
vibration of the mower during operation is an indication of damage. The unit should be promptly inspected
and repaired.
9. BLADE
The blade is made of pressed steel. Ensure that it is always balanced (an unbalanced blade will cause
dangerous vibrations). To check for balance, insert a round rod through the central hole and support the
blade horizontally. A balance blade will remain horizontal. If the blade is not balanced the heavy end will
rotate downwards. Reshape the heavy end until the blade is currently balanced, or replace the blade. To
remove the blade (1), unscrew the blade screw (2) and replace any parts, which are damaged.
When reassembling, make sure that the cutting edges face in the direction of the motor rotation. The blade
screw (2) must be torque to 20N.m.
WARNING: For service, replace the blade with Cobra blade: 263002917 or 263003498
Fig.12
WARNING: Disconnect the electric cord from the power supply.
WARNING: Protect hands by using heavy gloves or a rag to grasp the cutting blades when replacing
the blade.

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10. MAINTENANCE AND CARE
Warning: Before performing any Maintenance or cleaning work, Always remove the battery
and switch off the isolator key!
Do not spray the unit with water. Ingress of water may destroy the switch-plug combination unit and the
electric motor. Clean the unit with a cloth, hand brush, etc.
Expert inspection is required, do not make any adjustment by yourself, must contact to customer
Service centre:
a) if the lawn mower strikes an object.
b) if the motor stops suddenly
c) if the blade is bent (do not align!)
d) if the motor shaft is bent (do not align!)
e) if a short-circuit occurs when the cable is connected.
f) If the V-belt is defective, where fitted.
h) Use only manufacturer’s recommended replacement parts and accessories.
11. TROUBLESHOOTING
Fault Remedial action
Motor does not run
Turn power on
Start on short grass or on an area which has already been mown.
Clean discharge channel/housing –the mowing blade must rotate freely.
Correct the cutting height.
Motor power drops
Correct the cutting height.
Clean discharge channel/housing
Have mowing blade resharpened /replaced customer Service centre.
Grass catcher is not filled
Correct the cutting height
Allow the lawn to dry
Have mowing blade resharpened /replaced customer Service centre.
Clean the grille on the grass catcher
Clean the discharge channel /housing
Wheel drive does not function
(Power Drive Only)
Check the V-belt / gears customer Service centre.
Check the drive wheels for damage
Machine leaves ragged
finish
Height of cut too low, increase height of cut.
Cutting Blade Blunt, have the blade re-sharpened or replaced
Problem
Possible cause
Possible solution
Motor does not run
Power Turn off
Turn power on
Grass too long
Increase the height of cut and move
machine to shorter grass to start
Blade blocked
Clean discharge channel/housing
Machine leaves
ragged finish
Height of cut too low
Cutting Blade Blunt
Increase height of cut
Replace the blade

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Warning: before performing any maintenance or cleaning work, always remove the battery and switch
off the isolator key! Continue only with a stopped motor and standstill cutter..
CAUTION! Faults which can not be rectified with the aid of this table may be rectified by a specialist
company only (Cobra Dealer Support).
12. ENVIRONMENTALLY FRIENDLY DISPOSAL
According to EU directive 2012/19/EU on electric and electronic equipment and its
implementation into national law, all electric tools must be separately collected and
environmentally friendly recycled. Alternative disposal: If the owner of the power tool does not
return the tool to the manufacturer, he is responsible for proper disposal at a designated
collection point that prepares the device for recycling according to national recycling laws and
regulations.This does not include accessories and tools without electric or electronic components.
13. WARRANTY
This product is warranted in accordance with legal regulations for a 24 month period effective from the date of
purchase by the first user.
This product will not be covered if used in a commercial application.
This warranty covers all material or production failures, it does not include: defects from normal wear and tear,
parts such as, bearings, brushes, cables, air cleaning elements, brake pad, clutch disc, tyre, wheel, recoil
starter rope, belts, cutter blades, plugs, lubricant oils and grease or accessories. Damage or defects resulting
from abuse, accidents or alterations, natural fading of painted or plated surfaces, sheet peeling and other
natural deterioration.
Any damage that occurs from the use of non-genuine Cobra parts will not be covered.
We reserve the right to reject any claim where the purchase cannot be verified or when it is clear that the
product was not maintained properly. (Clean ventilation slots, carbon brushes and serviced regularly)
Expenses incidental to the warranty claim that are not covered;
-Compensation for loss of time, commercial loss or rental costs of substitute product.
-Costs incurred for transportation to and from the dealership.
Any damage that occurs from the following will not be covered; exposure of the product to smoke and soot,
chemical agents, bird droppings or other animal waste, seawater, sea breeze, salt or other environmental
phenomena.
Any damage resulting from operating methods other than those indicated in the owner’s manual will not be
covered.
Your purchase receipt must be kept as proof for date of purchase. Your un-dismantled mower must be
returned to your dealer in an acceptably clean state, accompanied by your proof of purchase.
Please Register Your Mower
If your dealer did not collect registration information from you, please take a few minutes and register your
purchase with Cobra. You can register by completing and mailing the registration card that should be in the
box or by going online to:
www.cobragarden.co.uk and clicking on Product Registration.

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14. EC-DECLARATION OF CONFORMITY
EC Declaration of Conformity
We herewith declare,
Cobra Garden Machinery
Henton & Chattell Ltd, London Road, Nottingham NG2 3HW UK
That the following machine complies with the appropriate basic safety and health requirements of the EC
Directive based on its design and type, as brought into circulation by us.
In case of alteration of the machine, not agreed upon by us, this declaration will lose its validity
Product
Electric Cordless Lawn Mower
Machine Type:
RM4140V (DYM101701)
Rated voltage/power
40VDC
550W
Measured sound power level:
90.1dB(A)
Guaranted sound power level:
92dB(A)
Notified Body for EC Directive 2000/14/EC:0036
TüV SüD Industrie Service GmbH
Westendstrasse 199 . 80686 München . Deutschland
Applicable EC Directives:
2014/30/EU
2006/42/EC
2000/14/EC
2011/65/EU
Applicable Harmonized Standards:
EN 60335-1 EN 60335-2-77 EN 62233
EN 55014-1 EN 55014-2
Authorized Signature/Date/ Place:
2015-10-17
Title of Signatory:
Managing Director
Name and address of the person
authorised to compile the technical
file
Cobra Garden Machinery
Henton & Chattell Ltd, London Road, Nottingham NG2 3HW UK