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Cobra LS520H Owner's Manual

LS520D

Made by: Cobra
Type: Owner's Manual
Category: Log Splitter
Pages: 10
Size: 16.77 MB

 

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MODELS: LS520H- LS520D

COBRA LOG SPLITTER 

OWNER’S MANUAL

 


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Symbols machine / operating manual 

1

Do not operate machine before having read 
the operating instructions, understood all the 
notes and assembly the machine as 
described here. 

Keep the instructions in a safe place for future use. 

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Inspection of Delivery

1

Proper use 

1

Residual risks 

2

Safe working 

2

Description of device 

3

Positioning

3

Start-up

3

Working with the log splitter 

4

Maintenance and care 

6

Guarantee

7

Possible problems 

8

Technical data 

8

Inspection 

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After unpacking, check the contents of the box 

!

 

That it is complete 

!

 

Check for possible transport damage 

Report any damage or missing items to your dealer, supplier 
or the manufacturer immediately. Complaints made at a later 
date will not be acknowledged. 

!

1 ready mounted machine unit

!

1 operating manual

!

1 operating lever

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Read the operating and safety instructions 
thoroughly before commissioning the 
machine. 
Wear safety shoes when working with the 
machine to protect the feet from falling logs. 

Wear safety gloves when working with the 
machine to protect the hands from chips and 
splinters. 
Wear safety goggles when working with the 
machine to protect the eyes from chips and 
splinters. 

Do not remove or modify any protection or 
safety devices. 

Nobody else should be in the working area of 
the machine other than the operator. Keep 
other persons or animals out of the danger 
area (minimum distance 5 m). 
Danger of being cut or trapped; never touch 
any dangerous parts when the splitting 
wedge is in motion. 
Caution!  
Always note when the log ram is in motion. 

Caution! 
Never remove a log jammed against the 
wedge by hand. 
Caution! 
Before starting any repair, maintenance or 
cleaning work, always switch off the motor 
and remove the plug from the socket. 

Stop!  
Follow the operating instructions. 
Open the bleed screw 

Î

 

Bleeding

 Page 13 

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Threatened hazard or hazardous situation.

 Not 

observing this instruction can lead to injuries or 
cause damage to property. 

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Important information on proper handling.

 Not

observing this instruction can lead to faults. 

User information

. This information helps you to use

all the functions optimally. 

Assembly, operation and servicing

. Here you are 

explained exactly what to do. 

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Electrical devices do not go into the domestic 
rubbish. Give devices, accessories and packaging 
to an ecofriendly recycling. 

According to the European Directive 2002/96/EC on 
electrical and electronic scrap, electrical devices that are no 
longer serviceable must be separately collected and brought 
to a facility for an environmentally compatible recycling. 

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The log splitter must only be used for splitting logs.

ƒ

The log splitter is only applicable for the private utilization
in the field of house and hobby.

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ƒ

Only straight-cut logs are suitable for use with the log
splitter.

ƒ

Metal parts (nails, wire etc.) must be removed from logs
before splitting.

ƒ

The intended usage also includes compliance with the
operating, servicing and repair conditions prescribed by the
manufacturer and following the safety instructions included
in the instructions.

ƒ

Any other use is deemed not to be use as prescribed. The
manufacturer is not liable for any type of damage resulting
from this: the user bears the sole risk.

ƒ

Unauthorised modifications on the log splitter exclude a
liability of the manufacturer for damages of any kind
resulting from it.

ƒ

Only persons who are familiarised with the device and
informed about possible risks are allowed to prepare,
operate and service this device. Repair works may only be
carried out by us or by a customer service agent
nominated by us.

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Even if used properly, 

residual risks 

can exist even if 

the relevant safety regulations are complied with due to the 
design determined by the intended purpose. 
Residual risks can be minimised if the “Safety information” and 
the “Intended usage” as well as the whole of the operating 
instructions are observed. 
Observing these instructions, and taking proper care, will 
reduce the risk of personal injury or damage to the equipment. 

ƒ

Failure to observe the safety precautions can lead to injury
to the operator or damage to property.

ƒ

Risk from electricity, by using non-standard electrical
connections.

ƒ

Touching live parts of opened electrical components.

ƒ

Risk of fire and slipping by leaking hydraulic fluid.

In addition, in spite of all the precautionary measures taken, 
non-obvious residual risks can still exist. 

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  Before commissioning this product, read and keep 

to the following advice. Also observe the preventive 
regulations of your professional association and the 
safety provisions applicable in the respective country, in 
order to protect yourself and others from possible injury. 

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Pass the safety instructions on to all persons who work
with the machine. 

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Keep these safety instructions in a safe place. 

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Make yourself familiar with the equipment before using it,
by reading and understanding the operating instructions.

ƒ

Do not use the machine for unsuitable purposes (see
“Normal intended use” and “Working with the log splitter”).

ƒ

Ensure that you have stand in a 

secure standing position

and maintain your 

balance 

at all times.

ƒ

Take a 

working position

, which is behind the slide of the

area of the operating lever. Never stand in the splitting
wedge’s zone.

ƒ

Never stand on top of the machine.

ƒ

Pay attention

 at all times. Take care with what you are

doing, and approach the work 

sensibly

. One moment of

carelessness when using the device can result in serious
injuries

Do 

not

 use the machine:

 

when you are 

tired

.

 

under the influence of drugs, alcohol or medications
that may impair your powers of judgement. 

ƒ

When working with the machine, always wear

 

protective goggles or face mask

 

safety gloves

 

ear protection, if necessary

 

safety shoes with steel toe-caps

ƒ

Wear suitable work clothing:

 

do not wear any loose-fitting clothing or jewellery, since
these may be caught or trapped by moving parts 

ƒ

Within his area of work 

the operator

 is responsible for

third parties.

ƒ

The machine may not be operated by

 children or young

people under the age of 18

.

ƒ

Keep 

children

 away form machine.

ƒ

Never operate the machine if 

other persons are in the

immediate vicinity

.

ƒ

Never

 leave the saw 

unattended.

ƒ

Keep your 

workplace in an orderly condition

! Untidiness

can result in accidents.

ƒ

Do not overload the machine! You work better and safer in
the 

given performance range.

ƒ

Only operate the machine with complete and correctly
attached 

safety equipment

 and do not alter anything on

the machine that could impair the safety.

ƒ

Faulty

 or 

damaged parts

 in the device must be replaced

immediately.

ƒ

Do 

not spray machine with water

(this is hazardous due to live components).

ƒ

Do 

not

 leave the machine 

standing in the rain

 or use

when raining.

ƒ

Store the 

unused machine 

in a dry locked place away

from the reach of children.

ƒ

Switch the machine off and 

remove the

mains plug from the socket 

when

 

carrying out repair works

 

carrying out servicing and repair works,
removal of faults

 

transporting

 

leaving unattended (even during short interruptions)

ƒ

Check the machine for possible damage

 

Before continuing to use the machine, the 

protective

devices

 must be inspected to ensure that they work 

perfectly and with their intended function 

 

Check whether the movable parts function perfectly 
and do not stick or whether the parts are damaged. All 
parts must be correctly installed and fulfil all conditions 
to ensure perfect operation of the saw 

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Damaged guards

 and parts must be properly repaired 

or exchanged by a recognized, specialist workshop; 
insofar as nothing else is stated in the instructions for 
use. 

 

Damaged or illegible 

safety warning labels

 should be 

replaced

 immediately. 

Electrical safety 

ƒ

Electrical connections

 must conform to IEC 60245 (H 07

RN-F) with a cable cross-section of at least

2.5 mm² for a maximum cable length of up to 10 m

ƒ

Never use the machine with a power supply cable of over
10 m in length. Longer power supply cables will cause a
drop in voltage. The motor will not be able to provide its
maximum performance and the operation of the machine
will be impaired.

ƒ

When laying the 

connecting attachments

, be sure that

they do get crushed or bent, and that the plug-and-socket
connection does not get wet.

ƒ

Do not use the

 cable

 for purposes for which it is not meant.

Protect

 the cable against 

heat, oil and sharp edges

. Do

not use the cable to pull the plug from the socket.

ƒ

Regularly check the 

extension cables

 and replace them if

they are damaged.

ƒ

Do 

not use any defective connection cables.

ƒ

When working outdoors, only use extension cables
especially 

approved 

and appropriately labelled for outdoor

use.

ƒ

Do 

not set up any provisional 

electrical connections.

ƒ

Never bypass

 protective devices or deactivate them.

The 

electrical connection

 or 

repairs

 to electrical parts

of the machine must be carried out by a certified
electrician or one of our customer service points. Local 
regulations – especially regarding protective measures – 
must be observed.  

  

Repairs

 to other parts of the machine must be carried 

out by the 

manufacturer

 or one of his customer service 

points. 

 Use only original

 

spare parts, accessories and special 

accessory parts. Accidents can arise for the user through 
the 

use of other spare parts

. The manufacturer is not 

liable for any damage or injury resulting from such action. 

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Fig. 1 

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Position the log splitter on a work surface at a height of about 
60 – 75 cm, this will create an comfortable working position. 
Place chocks under the wheels to prevent the machine rolling 
during operation.  
Ensure that the working area meets the following conditions: 

 

no danger of slipping 

 

level 

 

free of obstacles 

 

sufficiently well lit 

Do not operate the machine in the direct vicinity of gas or 
petrol pipes or containers, or any other easily inflammable 
materials. 

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Check 

that the machine is completely and correctly

 

assembled.

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Before using the 

splitter

, make sure each time that

 

there are no faulty connections (tears, cuts, etc.)

 

there are no damage at the machine

 

all screws are tight

 

check the hydraulic system for any possible leaks 

3

1.hydraulic tank
3.frame tube
5.electric motor
7.push button

2.splitting wedge

 

4.log ram
6.switch
8.plug

9.wheel

10.operating lever

11.support leg

12.handle

13.extension leg

 


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Mains connection

 

ƒ

Compare the voltage given on the machine model plate
e.g. 230 V with the mains voltage and connect the machine
to the relevant and properly earthed plug.

ƒ

Only use 

connection cables

 with sufficient diameters.

ƒ

Connect the machine via a 30 mA fault current safety
switch.

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Fuse protection: 1

3

 A

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Operating pushbutton 

Fig. 2

 

        Operating pushbutton 

  

Switching on 

Push the green button. The motor is running as long as the 
green button remains pushed. 

  

Switching off 

Stop pushing the green button. 

 

Do not use any device where the operating pushbutton 

does not work properly. Repair or replace damaged 
pushbuttons immediately.  

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Hydraulics

ƒ

Never operate the machine in the event of any possible
danger from hydraulic fluid.

ƒ

Ensure that the machine and working area are clean and
free of oil.

Danger of slippage or fire!

ƒ

Check the hydraulic reservoir regularly to ensure that it
contains enough hydraulic oil (see “Care and
maintenance”)

 Capacity:    3.2 litres

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  additional 

SAFETY INSTRUCTIONS 

ƒ

The log splitter may only be operated by a single person.

ƒ

The machine may only be operated by persons over the
age of 18 years, and who have read and understood these
operating instructions.

ƒ

Wear protective equipment (safety goggles/mask, gloves,
safety shoes) to protect yourself from possible injury.

ƒ

Never try to split logs containing nails, wire or other similar
objects.

ƒ

Already split wood and wood chips create a dangerous
working area. The operator may stumble, slip or fall.
Always keep the working area neat and tidy.

ƒ

Never place the hands on or near any moving parts of the
machine when it is switched on. Maintain a safe distance
from the log, the ram and the wedge in order to protect
your hands from injury.

ƒ

Split only timber which corresponds to the maximal length
to be worked with.

   What type of logs can I split? 

Size of logs 

Length: 

max. 520 mm 

Diameter:   50 – 250 mm

The log diameter is a recommended guideline figure, because: 

 

thin logs can be difficult to split if they contain knots or if 
the fibres are too strong. 

 

logs with a diameter of over 250 mm can be split if the 
fibres are smooth and open. 

Do not try to split green logs. Dry logs are much easier to split, 
and do not cause jams as often as green (damp) wood. 

   Operation 

Two-hand operation 

1. Press the operating pushbutton on the electric motor. Wait

a few moments until the motor has reached its operating
revolutions and the required pressure has been built up in
the hydraulic pump – Fig. 3.

2. Press the operating lever down simultaneously –    Fig. 3.

Î

 

The log ram pushes the log against the splitting

wedge, and the log will be split.

3. Release the operating lever as well as the operating

pushbutton. The log ram will now return to its original
starting position – Fig. 4.

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Fig. 3

 

Fig. 4

 

   

Special instructions for splitting logs:

 

ƒ

Preparations:

The logs to be split should be cut to the maximum dimensions
(520 mm long, 

 50 – 250 mm). Ensure also that the logs are

cut straight and square.
Place the log properly on the log splitter, so as not to cause
any risk of stumbling or falling to the operator.

Bleeding 

Open the bleed screw 3 – 4 complete turns – Fig. 5. 
Close the bleed screw again when you are finished splitting 
logs. 

Fig. 5

 

          Bleed screw 

  tighten 
  open (bleeding)

 

ƒ

Splitting logs:

¾

Always place the logs lengthwise and flat on the main
frame of the log splitter. The log must be enclosed by the
log guide plates. Fig. 6

Fig. 6

 

¾

Never place the log on the frame at an angle. Fig. 7

Fig. 7

¾

Always ensure that the splitting wedge and the log ram
contact the ends of the log at right-angles.

¾

Never try to split two logs at once.

¾

Never try to remove or replace the log during the splitting
process.

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Never try to force the splitting of the log by maintaining 

the pressure for several seconds. This can lead to damage to 
the machine.  
Reposition the log on the main frame and repeat the splitting 
process, or put the log to one side. 

How to release a jammed log? 

1. Loose the operating lever as well as the operating

pushbutton that the log ram can go back.

1. Place a triangular wooden chock under the log, then move

the log ram forward so that it pushes the chock under the
jammed log.

2. If the log is not released, keep repeating this procedure,

using larger chocks, until the log is released.

 

Never use a hammer to release a jammed log, and keep 

your hands away from the log.  
Do

 not

 enlist the aid of a second person - this is a one-man 

job. 
Do not try to release the log by using a hammer, since this 
may break the motor block. 

ƒ

Finishing work:

ƒ

Wait  for  t

he log ram has go back to its 

initial 

starting  / 

basic

 

position.

ƒ

Then remove the plug from the power socket.

ƒ

Close the bleed screw. Fig. 5

ƒ

Follow the care and maintenance instructions. 

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Remove the plug from the power socket before 
starting any maintenance or cleaning work.  

 

Wear protective gloves in order to avoid injury to the 

hands. 

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Observe the following in order to keep the log splitter in 
good working order: 

ƒ

Clean the machine thoroughly after you have finished
using it.

ƒ

Remove any resin remains on the machine.

ƒ

Oil the piston rod (Fig. 1) regularly with an
environmentally friendly spray oil.

ƒ

Check the oil level and change the oil as necessary.

Sharpening the splitting wedge 

After extended periods of use, or if the splitting performance is 
reduced, sharpen the splitting wedge with a file (and remove 
any burrs). Fig. 8 

Fig. 8 

   

How do I check the oil level?

 

1. The log ram must be in its starting position.
2. Stand the log splitter on end, with the filler opening at the

top. Fig 9

  

A second person will be required to up-end and 

hold the log splitter.

  

3. Unscrew the dipstick – Fig. 10. Do not drop or lose the oil

seal when removing the dipstick.

4. Clean the dipstick and the oil seal.
5. Replace the dipstick fully into the oil reservoir.
6. Now remove the dipstick again, and read off the oil level.

 If the oil level is between the two marking on the

dipstick, there is sufficient oil in the reservoir.

 

If the oil level is below the lower marking, more oil

should be added with the aid of a clean funnel.
lower marking       upper marking

7. Check the oil seal and replace it if it is damaged in any

way.

8. Replace the dipstick and screw it firmly into place.

Caution! Do not tighten the screw too tightly, since this may
damage the oil seal or the thread in the cylinder cover.

Oil seal 

Sharpen wedge

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Fig. 9

 

Fig. 10 

When should I change the oil?

 

The first oil change should be carried out after 50 
operating hours, and then every 250 operating hours. 

Changing the oil: 

1. The log ram must be in its starting position.

2. Place a container under the log splitter to catch the old oil.

The container should have a capacity of at least 4 litres.

3. Unscrew the dipstick. Do not drop or lose the oil seal when

removing the dipstick.

4. Now tip the machine to empty the oil into the container.
5. Stand the log splitter on end, with the filler opening at the

top. Fig 9.

A second person will be required to up-end and

hold the log splitter.

6. Pour in the new hydraulic oil (3.2 litres) using a clean

funnel.

7. Clean the dipstick and the oil seal.
8. Check the oil seal and replace it if it is damaged in any

way.

9. Replace the dipstick and screw it firmly into place.

Caution! Do not tighten the screw too tightly, since this may
damage the oil seal or the thread in the cylinder cover.

Dispose of the old oil properly (local oil disposal 
point). The old oil must not be poured into the 

ground or drainage system, or mixed with other 
waste.  

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Hydraulic oil 

We recommend the following hydraulic oils for the hydraulic 
cylinder: 

¾

Shell Tellus T 22

¾

Aral Vitam Gf 22

¾

BP Energol HLP 22

¾

Mobil DTE 11

¾

or equivalent

Do not use any other types of oil. The use of any other 
type of oil will adversely affect the operation of the 
hydraulic cylinder.  

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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, brake pad, clutch disc, tyre, wheel, 

belts, cutter blades, 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

.

 Any damage resulting from 

operating methods other than those indicated in the owner’s 

manual will not be covered.

 

Dipstick 

7

 


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Electric motor performance 

P = 1500 W   S3  (8 min/2 min)

50 – 250 mm

520

Problem

possible cause

remedy

Logs are not being split properly 
(insufficient splitting performance) 

The log is not positioned correctly

The log exceeds the maximum
dimensions or the wood is too hard for
the performance of the machine

The splitting wedge is not working
properly

Oil leak

Hydraulic pressure too low

Incorrect connecting lead (longer than
10 m or too small cable cross-section)

Reposition the log correctly

Cut the log to the required dimensions

Sharpen the splitting wedge, and check
for any burrs or notches

Place a sheet of cardboard under the
log splitter in order to locate the leak.
To correct the problem, refer to the
manufacturer.

Check the oil level and add more oil if
necessary.

If the problem cannot be rectified, refer
to the manufacturer.

 

Use the correct connecting lead

Log ram travels out jerkily or under heavy 
vibration 

Air in the circuit

Open the bleed screw

Check the oil level and add more oil if
necessary.

If the problem cannot be rectified, refer
to the manufacturer.

Log ram will not move out 

Hydraulic pump defective

To correct the problem, refer to the
manufacturer.

Motor will not start 

No electrical power

Connection cable defective

Electric motor defective

Check the fuse (1

3

A).

Replace the connection cable or have

 

it 

checked by an electrician.

To correct the problem, refer to the

 

manufacturer. 

Oil leak at the dipstick 

Oil seal at the dipstick not sealing

Replace the oil seal.

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Name 

Model 

Splitting force 

Log length 

520 mm

Log diameter 

Stroke 

Power supply 

230 V ~   50 Hz

Revolutions  

2820 rpm

8

LS520H -

LS520D

50kN(5T)

COBRA 

LS520H

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Trouble Shooting

 

 


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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 
Machine Description: 

Log Splitter 

Machine Type: 

LS520H (LS520D) 

Name of Notified Body 

TÜV SÜD Industrie Service GmbH 
Ridlerstraße 57, 80339 München, Deutschland 

Applicable EC Directives 

2006/42/EC       
2006/95/EC   
2004/108/EC 

Applicable Harmonized 
Standards 

EN 60204-1:2006 + A1 
EN 609-1:1999 +A2 
ZEK 01.4-08/11.11 
EN 55014-1:2006+A1 
EN 55014-2:1997+A1+A2 
EN 61000-3-2:2006+A1+A2 
EN 61000-3-11:2000 

Authorized 
Signature/Date/Place 

Peter J. Chaloner  27-06-2015

 

Title of Signatory 

Managing Director 

Name and address of the 
person authorized to compile 
the technical file 

Cobra Garden Machinery  
Henton & Chattell Ltd, London Road, Nottingham NG2 3HW 
United Kingdom 

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