Kellfri 26-LW20 User manual

Carefully read the operating instructions
before using the product!
Operating instructions translated from Swedish
26-LW20
BACKHOE DIGGER

Table of contents
TABLE OF CONTENTS
Introduction 3
Product information 3
Machine’s function 3
Safety instructions 4
Product safety information 4
Warning decals 5
Instructions for emergency situations 6
Personal protection 6
Surroundings 6
Measures before use 6
Before switching on the unit 7 - 8
Connecting 9
Operation and Driving 10 - 13
Basic excavation techniques 12
After use 15
Transportation and storage 15
Maintenance and service 15 - 17
Exploded diagrams and materials list 18 - 30
Hydraulic diagram 19
Recycling 30
Complaints form 31
Warranty terms and conditions 32
Kellfri designs and supplies ecient, aordable machinery and components for forestry,
agriculture, construction and gardening in Sweden, the rest of the Nordic region and Europe.
We recommend that you always read and follow the safety instructions and the instructions in
the machine’s operating manual.
Kellfri is not liable for any errors in this document.

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Kellfri AB has a policy of continuous product development and therefore reserves the right to make
modications, e.g. to the design and appearance of the product, without prior notice.
INTRODUCTION
Thank you for choosing a product from Kellfri AB. Compliance with the safety instructions, operat-
ing manual and sound common sense will guarantee many years of enjoyment using the product.
Kellfri’s attachments and products are aimed at self-employed farmers, horse enthusiasts and other
country-dwellers who have stringent demands on performance.
PRODUCT INFORMATION
This backhoe digger is for those who need extra power and reach in digging work.
• Backhoe digger for tractors over 70 hp
• Mounted on 3-point linkage
• Digs 285 cm deep, bucket width 50 cm
A backhoe digger for most digging jobs such as clearing ditches, laying hoses and cables, grading
courtyards and drainage maintenance.
The digger arm has a reach of 460 cm and the bent steel boom provides a good movement pattern.
The backhoe digger digs 285 cm deep, with a powerful serrated digger bucket 50 cm in width.
The backhoe digger is controlled from the tractor cab with a 2-lever valve block, with separate levers
for the stabilisers and additional hydraulic outlet. If you prefer to control operations from the digger,
an operator seat is available as an accessory.
The hydraulic stabilisers are manually adjustable laterally, to adapt the rig for enclosed spaces or
maximum lateral stability. The backhoe digger has its own hydraulic system with integrated hydrau-
lic oil tank and hydraulic pump with gearbox mounted on the tractor's PTO drive shaft, giving the oil
ow the digger needs while the tractor can run at a low engine speed, yielding good fuel economy.
Accessories: narrow bucket, ditch bucket and grading bucket, both xed and tiltable.
MACHINE’S FUNCTION
Intended for excavation only.
TECHNICAL DATA 26LW20
Working pressure 180 bar
Breaking force of bucket 2800 kg
Excavation depth 2850 mm
Excavation height 4950 mm
Excavation height with at bottom 3,590 mm
Hydraulic ow min 45 l/min, pump included
Lifting force of bucket, straight
boom
765 kg
Max. lifting force, excavator arm 1670 kg
Reach 4600 mm
Turning angle 180 °
Weight 1000 kg

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Kellfri is not liable for any modications, changes or rebuilds carried out by customers.
SAFETY INSTRUCTIONS
Before using the equipment or product, and for the safety of yourself and others,
you must read the safetyinstructions and instruction manual and understand their contents. Always
keep the safety instructions and operating manual handy for users of the equipment or product. For
the safety of both yourself and others, it may be a good idea to read through the safety instructions
every now and then. If the safety instructions or instruction manual gets damaged or in any other
way cannot be used, new copies may be ordered from:
Kellfri AB, Munkatorpsgatan 6, SE-532 40 SKARA, Sweden.
The safety instructions can also be downloaded from Kellfri’s website: www.kellfri.co.uk
Do not use the equipment or product if you feel ill, tired or are under the inuence of alcohol.
Do not use the equipment or product if you are taking prescribed medication or drugs,
or suering from severe depression or mental illness. People under the age of 15 and those suering
from mental illness may not use the attachment.
PRODUCT SAFETY INFORMATION
• Always read the instruction manual carefully before using the backhoe digger.
• Never leave the equipment while the tractor engine is running. Turn o the engine when
you leave the equipment – even for a short period.
• Always disengage the machine before performing service or maintenance work.
• Only the operator may be present in the vicinity of the machine while in operation.
• Do not use the machine without all the guards being correctly mounted.
• Keep bystanders and animals away from the work area , and always make sure there is sucient
room for the attachment to swing around.
• Operate the digger from the cockpit only.
• Only use the backhoe digger for the work it is intended for. Do not use the digger to pull
objects such as barriers or lifting devices. Do not attach ropes, chains, etc. to the unit.
• Never excavate in close proximity to the stabilisers. The ground may collapse under
the backhoe digger.
• Never overload the digger’s and/or towing vehicle’s capacity.
• When working on slopes, work with the digger pointing uphill and avoid swinging the digger
sideways downhill. Avoid digging on slopes that may cause the towing vehicle to tip over.
• Reduce speed when driving on uneven terrain, on slopes or when swerving to prevent
the towing vehicle from tipping over.
• Do not adjust the valve settings. Incorrect adjustments can result in damage to the machine
and injury.
• When dismounting from the digger, lower the digger’s bucket and stabilisers to the ground.
Switch o the tractor engine, pull the handbrake and remove the ignition key.
Warning!
The original design of the machine must not, under any circumstances, be modied
without the approval of the manufacturer. Unauthorised modications and/
or accessories may cause life-threatening injuries or death to users and others.

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• Operators or others should not stand under suspended loads.
• The backhoe digger must not be parked with a load in the bucket and the bucket elevated.
• As the backhoe digger is not equipped with a lighting device, use the backhoe digger during
the day.
• An SMV sign must be attached to the rig when transporting by road.
WARNING DECALS
Make sure warning decals are always visible and clean them when necessary. Do not use a high-
pressure washer directly on the warning label. If a label becomes worn or in any other way unusable,
order a new set of labels.
SYMBOL EXPLANATION
Read the operating manual! Before starting work.
Stop the motor when carrying out repairs.
Ejection warning!
Risk zone 200 m
Respect the equipment’s risk zone!
Warning! Electric cable
General risk of crushing hands
General risk of crushing feet
WARNING! Risk of crushing!
No one should stand behind the tractor when switching
the machine on and o.
Greasing after 10 hours of operation
Always use stabilisers when loading/unloading.
Retighten all bolts and connections.
Warning! Keep o the machine!
Risk of accidents to children.
Children must be kept well away from the machine.
Always store the product on a dry surface,
preferably under a roof, when not in use.
The product is CE-marked
Product name:
Type:
Weight:
Year of manufacture:
Serial no.: 2006/42/EC

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Warning!
Never use equipment or products with defective safety components.
INSTRUCTIONS FOR EMERGENCY SITUATIONS
In case of emergency, call 112
Always have a mobile phone or emergency phone available when working alone. A rst-aid kit
and re extinguisher must be kept in an easily accessible location when carrying out any work,
maintenance or service. To perform an emergency stop, turn o the tractor.
PERSONAL PROTECTION
Always use suitable protection equipment. Do not wear loose clothing or jewellery while working with
the equipment. Long hair should be tied up when working with equipment that has moving parts.
SURROUNDINGS
Check that the work area is free from bystanders, children and objects before hitching or using the
equipment. There is a risk of serious injury. Be extra careful if there are children in the vicinity of
the area where the equipment or product is used or stored. Check that there are no low-hanging
electrical cables within the work area. Exercise caution when working on slopes and close to ditches.
Always work alone with equipment or products that are made for working alone. Remove all rubbish
from your work area. Keep work areas clean. Always respect the equipment’s risk zone.
Warning!
Children must not be left unsupervised in the area.
STEPS TO TAKE BEFORE USE
Carefully read the instruction manual. Make sure that you understand the safety instructions, the
instruction manual and warning decals. Use common sense when using the product and suitable
personal protective equipment. Always check the performance of the machine combination to
be used. It is important that these are compatible and work satisfactorily together. This is done to
ensure the equipment works as expected, and to guarantee the safety of yourself and others. Carry
out a visual inspection of the equipment or product before use. Repair or replace damaged or worn
parts immediately to reduce the risk of injury.

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Grease moving parts and check that all nuts and bolts are tightened. Correct if necessary.
Learn and remember the correct working method. Beginners must work slowly until they have
learned how the machine or product works. Users/customers are responsible for ensuring users
can handle the situation. If users feel that the machine is dangerous to use, it should not be used.
• Ensure that all nuts, bolts and installations are securely mounted, that all packing/
transport material such as tape, steel bands, rope, etc. has been removed.
• Check the tyre pressure on the tractor, see information on the tyre walls. Do not exceed the
maximum pressure!
• Check that the oil level in the engine is correct.
• Ensure before use that all guards are in place and are not able to come loose.
• Check the oil level in the gearbox, top up if necessary (0.2–0.35L)
BEFORE SWITCHING THE UNIT ON
Before connecting the backhoe digger to the tractor’s three-point linkage, it is important to observe
the distance between the tractor and digger. Maintaining the correct distance between tractor
and digger is important for operator safety. When assembling, there must be a minimum of 50 cm
horizontal space (when the seat is in the forward position) and a minimum of 60 cm (when the seat
is in the extended position). There must also be at least 20 cm of space between the operator’s head
and the tractor’s parts.
1.With the tractor’s three-point linkage approx. 20–22 cm above the ground, measure the horizontal
gap between the lowest articulation joint and the nearest object that comes into contact with the
backhoe digger seat. (e.g. roll-over guard or tractor cab).
Warning!
Compliance with the safety instructions requires that the product is only
used as described in these instructions. It is the user’s responsibility to read
through the instructions and comply with them.
HORIZONTAL
DISTANCE

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2. To check the vertical distance between the tractor and the driver’s seat on the digger, make sure
that the lowest link on the three-point linkage is approx. 20–22 cm above the ground.Then measure
the distance between the lowest articulation joint and any object that might hit the operator’s head
(e.g. tractor cab or roll-over guard).
Warning!
WARNING! Always read the operating instructions!
When the digger is connected to the tractor’s three-point linkage with roll-over guard
and/or cabin it can be dangerous and could cause serious accident or death if not
installed, operated and maintained correctly. Always use safety cotter pins of the correct
size and grade for the three-point linkage.
Measure distance min. 200 cm

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CONNECTING
Make sure that the unit is on a at, stable surface.
1. For equipment connected to the tractor, follow the correct procedure written in the tractor’s
operating manual. Carefully reverse the tractor to the backhoe digger (reverse the tractor close
enough to connect the hydraulic unit).
2. Connect the hydraulic system to the tractor.
3. Start the tractor’s engine at low RPMs. Open the tractor’s valve to start the backhoe’s hydraulic
unit (check for leaks).
4. Raise the backhoe using the outriggers and boom control levers until the backhoe’s main
frame is about 20-22cm above the ground. Make sure the unit is in the vertical position
(perpendicular to the ground), see illustration.
5. Reverse the tractor until the lower link of the three-point linkage is at the correct height with
the left and right assembly holes. N.B. Note the position of the hydraulic hoses and the top link
when reversing the tractor.
6. Mount the unit on the three-point linkage and secure with locking pins.
7. Check all hoses to ensure that they are not caught or in the ground. Keep the hoses away from
the operator during operation. Secure all hoses in place for operator safety and to prevent
damage.
MAKE SURE NO ONE ELSE IS NEARBY WHEN CONNECTING
THE BACKHOE. RISK OF CRUSHING! RISK OF CRUSHING!
When connecting the Backhoe digger to the tractor’s three-point linkage,
it is very important that the pushrod is securely mounted to avoid the risk
of it failing. Make sure that there are enough screw threads on the push rod.
The backhoe digger may not be used without these three points being secured
to the tractor’s three-point linkage.
Failure to do so may result in serious injury or death.
Keep the backhoe digger vertical during connection
(perpendicular to the ground)

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OPERATION AND DRIVING
Only those who understand the safety instructions and the operating instructions may use the
equipment or product. Exercise caution and care when working with the equipment and only use it in
the way described in the operating instructions.There is a risk of crushing when working with equipment
that has moving parts. Exercise caution when working with equipment with hydraulic hoses as oil under
pressure can penetrate the skin. Immediately seek medical attention if this should occur.
Always work alone with equipment that is made for working alone. Never overload the equipment
and respect its risk zone.
The backhoe digger has 5 control levers. Two are for the stablisers and two for swinging the arm and
operating the bucket. The lever in the middle is for an extra function. Read the safety precautions in
the operating instructions before using the machine. Remember: Left and Right are determined by
the operator’s seated position on the unit/tractor and the steering towards the bucket.
STABILISERS Pushing the levers forward will move the stabilisers “DOWNWARDS” and pulling the
levers back will move the stabilisers “UPWARDS”. Both stabilisers should only be lowered to stabilise
the backhoe digger during work.
BOOM/SWING: Pushing the lever forward will “LOWER” the arm. Pushing the lever fully forward
engages “MOVING MODE”. Pulling the lever back will “RAISE” the arm. Pulling the lever to the left
swings the arm to the“LEFT” and pulling the lever to the right, swings the arm to the“RIGHT”.
OPERATING THE BUCKET: Pushing the lever forward will move the arm“OUT”away from the operator.
Pulling the lever back will bring the arm“IN”towards the operator.
By moving the lever to the left, the bucket will“FILL” or turn (inwards).
By moving the lever to the right, the bucket will“TIP”, and turn (outwards).
Warning!
WARNING! DO NOT ATTEMPT TO RAISE THE UNIT USING THE 3-POINT LINKAGE!
THIS MAY DAMAGE THE HYDRAULIC SYSTEM.
OPERATING THE
BOOM/SWING
LEFT
STABILISER
Auxiliary
function
OPERATING THE
BUCKET/LIFTING ARM
RIGHT-
STABILISER

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USE/OPERATION
When using backhoe diggers, you should always strive for a more exible technique. Flexibility is
achieved by learning and mastering the control levers.
Operate the machine only while seated at the control levers or inside the tractor. Any other method
may result in personal injury or death.
Never operate the tractor while someone is sitting on the unit!
Check the excavation area for foreign objects before using the machine.
Carefully dig into the area where objects are expected to be. If YOU feel the bucket coming into
contact with any object, stop the machine and stop digging immediately.
BEFORE YOU BEGIN EXCAVATING
Before excavation, it is a good idea to plan the work rst. There are a number of things to bear
in mind. The operator should inspect the work area and check for possible hazards. The operator
should have a complete understanding of the work to be performed.
After familiarising yourself with the work area, it is time to plan the actual digging.
Position the backhoe digger so that you won't need to reposition the machine for the duration of
the excavation and to maximise the machine's eciency.
DO NOT USE THE BACKHOE DIGGER IF THE STABILISERS ARE NOT FULLY IN CONTACT WITH
THE GROUND!
DO NOT USE THE BACKHOE DIGGER IF A LEAKAGE OCCURS. THIS CAN RESULT IN SUDDEN
LOSS OF HYDRAULIC PRESSURE WITH THE RISK OF DAMAGE TO THE MACHINE OR INJURY!
DANGER!
WARNING! .NEVER ALLOW INEXPERIENCED DRIVERS TO DRIVE THE TRACTOR AND/
OR OPERATE THE MACHINE!

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When the unit is in position, lower the stabilisers to the ground. The tractor wheels should still
be supporting most of the vehicle's weight, as the stabilisers only provide stabilising support and
prevents the unit from moving or bouncing during operation. If the tractor is equipped with a front
loader, lower it to the ground. When working on fragile surfaces such as concrete, stone ground, sandy
or loose ground, lay a plywood board under stabilisers to distribute the weight over a larger area.
BASIC EXCAVATION TECHNIQUES
When you start digging, always make the rst cuts as thoroughly as possible and make sure you
follow the contour. The purpose of this is to minimise damage to the ground and the bucket.
The rst cuts are also important as they will serve as a template for the remaining cuts. Following the
rst cuts carefully will make the remaining excavation more precise.
WORKING DIRECTION

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When digging with the attachment, extend the boom arm away from the operator. Lower the arm
and bucket and start digging. The bucket's teeth should be 30º to 45º to the ground. Once digging
has started, bend the bucket until the cutter is horizontal to the ground. Pull the bucket towards the
operator and operate the lever to keep the bucket at the correct level. When the bucket is moving
towards the operator, actuate the boom arm to maintain an even cutting level. At the end of the
digging cycle, bend the bucket fully inwards while raising the arm. Swing the arm sideways and
dump the bucket contents in the desired place. Start tipping the bucket before you reach the pile.
When the bucket is empty, swing back the arm and position the bucket for the next digging process.
The entire excavation process should be go smoothly.
When excavation is almost nished, with about 15 cm left to excavate. Clear and press the sides of
the excavated hole. Use the at side of the bucket to scrape a few high spots. Remove any protruding
stones if they appear to be loose. To excavate nished walls, nish the far wall by bending the
bucket outwards and lowering the arm downwards. To excavate the closest wall, bend the bucket
inwards and lift the arm upwards.
When the sides are nished, nish digging the bottom of the hole.

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EXCAVATION ON SLOPES
When digging on slopes, always position the backhoe digger facing uphill if possible. It may be
necessary to dig a level surface on the slope where you can set up the excavator for digging on the
slope. Place excavated soil facing downhill. When excavating the actual hole, place excavated soil
on the uphill slope.
As hydraulic systems are never 100% sealed, they must be inspected prior to loading the attachment.
Leaks can arise from internal leaks in tractor valves, electrical valves on frontloaders, internal leaks in
the equipment's hydraulic cylinders, etc. Check the extent of the leak by running the attachment's
cylinders at extreme position and maintaining pressure for 1 minute. If the cylinder starts to
"wander" in the opposite direction, a gasket is leaking. Replace the seal or cylinder.
Always work alone with equipment that is made for working alone. Never overload the equipment
and respect its risk zone.

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AFTER USE
Do not park with a suspended load but with the equipment resting on the ground.
Wash down the equipment with water if necessary.
TRANSPORTATION AND STORAGE
Check that the work area is free from bystanders, children and objects before driving o.
Always observe additional caution during transport and moving. Ensure that the equipment or
product is well anchored and existing transport lashings are tted. Always position the load as low
as possible. Respect the risk zone even during transport and moving. Do not permit anyone to walk
under suspended loads when carrying out lifts. Trailers used for transport should have brakes that
work. Always store the equipment or product on a dry surface, preferably under a roof, when not in
use. Ensure that the equipment or product is stable and cannot tip over. Never permit children to
play at the storage site. Be aware of the tipping risk!
TRANSPORTATION
• Before transportation, make sure that the boom and swing arms are locked to prevent
uncontrolled movement. Raise the boom and bucket to transport mode. Fit the transport
locking devices. Raise the stabilisers.
• Drive slowly on uneven terrain, do not drive too close to sloping terrain and potholes.
• Check the tyre pressure on the tractor, see information on the tyre walls. Do not exceed the
maximum pressure!
STORAGE
Before storing, make sure that the machine is clean, wash away all dirt from the excavator.
Lubricate visible cylinder rods. Lubricate all joints, make sure that the hydraulic system is sealed
against contaminants. Store the machine on a dry surface, preferably under a roof, when not in use.
BEFORE NEXT USE
• Clean the machine, it makes it easier to detect damage.
• Check all hydraulic hoses and couplings before connecting the unit to the power take-o.
Check for leaks after switching on.
• Check that joints are suciently lubricated for smoother work.
• Check and tighten bolts if necessary.
• Check the tyre pressure on the tractor, see information on the tyre walls. Do not exceed
the maximum pressure!
MAINTENANCE AND SERVICE
The tractor's engine must be turned o and the equipment lowered to the ground before starting
any servicing work. Make sure that the equipment is stable and cannot tip over when carrying
out maintenance and service work. When performing maintenance on the machine, use suitable
support/holder as assistance. Replace damaged or worn parts immediately to reduce the risk of
injuries. Carry out maintenance, service and checks in line with recommendations. Only use spare
parts with equal performance to reduce the risk of injuries and breakdowns. All electrical repairs
and electrical connections must be carried out by a qualied person. Always follow the safety
instructions for maintenance according to the schedule. This is particularly important for blades
and safety equipment, in consideration of the danger it would entail if they were to come loose
while working.
• Regularly check the condition of the equipment to prevent breakdowns. If cracks, twists,
bends, gaps or fatigue are discovered, stop using the equipment and rectify the fault. Worn
parts must be replaced.
• Retighten all nuts and bolts after a few hours of operation and at the end of a day's work.
• Disconnect the equipment from the towing vehicle while faults are being repaired.

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• Never repair hydraulics before rst making sure there is no pressure in the system.
• Never work under a suspended load.
• Check that all nuts and bolts are tightened after maintenance and service work. Always test the
machine before starting work.
• Turn o the tractor and move the hydraulic levers back and forth to release any pressure
that may still be in the oil hoses and pipes before starting any work on them or the hydraulic
cylinders.
• Clean the lter in the suction pipe after 10 hours’ work.
• Check all parts for wear and retighten bolts, nuts and screws if necessary.
• Immediately replace hydraulic hoses if cracks or wear are detected.
• Check that the hoses are not rubbing against sharp edges, Rectify if necessary.
• Lubricate all nipples before and after each shift.
• Tighten leaking connections if there are any leaks. Do not overtighten the connections.
They may break if they are overtightened
Regular maintenance is the key to long service life and safe operation. It is important
that maintenance schedule is performed and followed.
EVERY 8 HOURS OF OPERATION:
WARNING: THE TRACTOR MOTOR MUST BE TURNED OFF PRIOR TO LUBRICATING
Lubricate moving parts carefully (the arm and end of all cylinders). Inadequate lubrication can result
in unnecessary wear and mechanical damage. Use a universal lubricant.
IMPORTANT! Avoid over-lubricating. Dirt collects easily in areas with grease and causes increased
wear. After lubrication, wipe excess grease o from couplings.
EVERY 40 HOURS OF OPERATION
Check the hydraulic oil level. If the oil level is too low, check for leaks in the hydraulic
system.
IMPORTANT! The oil level must be checked while the unit is in transport mode.
Check for wear on all pins, bushings, split pins, bolts, nuts, etc. Tighten all bolts and replace if
necessary.
DANGER!
Pressurised oil and fuel leaks can penetrate skin and cause serious injuries.
Do not use your hands to locate leaks.
Use a piece of paper or cardboard to search for leaks.

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FAULT CAUSE ACTION
The backhoe digger arm is unable
to lift or swing
• Low oil level
• Swing speed limitation valve
is closed or not connected
properly
• Broken hydraulic hose
• The arm joint is blocked
• Defective/sub-standard
cylinder
• Fill with oil Hydraulic tank capacity: 25L
• Open/connect the valve
• Check the system for leakages
• Remove objects blocking the joint
• Replace cylinder
Backhoe digger lifts/turns
sluggishly
• Oil is cold
• Tractor RPMs too low
• Leaking cylinders
• Dirty oil lter
• Clogged/defective valve
• Wait until the oil reaches the correct
temperature
• Increase speed
• Replace cylinder gaskets
• Clean or replace
• Check valves, replace if necessary
Oil overheating • Dirty oil
• Inlet lter clogged
• Safety valve incorrectly set
• Engine runs too fast
• Erratic driving, resulting in
excessive oil ow on valves
• Defective oil line
• Wrong oil type for hot weather
• Change the oil and oil lter
• Cleaning the lter element
• Adjust the valve
• Reduce speed
• Learn to drive correctly and more smoothly
• Replace broken cables
• Use recommended oil
Grease points

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A Max. excavation depth 2850 mm
B Max. excavation height with at bottom 4950 mm
C Reach 4,600 mm
D Bucket rotation 150º
E Angle of rotation 180º
Oil ow min 45l/min
Suitable tractor size 70hp
Strength of digging arm 1,670 kg
Bucket strength 2,800 kg
Maximum lifting capacity 765 kg
Loading height 3,590 mm
Weight 1000 kg
C

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HYDRAULIC DIAGRAM
Pump
Cylinder bucket
Stabilising cylinder
Stabilising cylinder
Rotation cylinder
Cylinder boom
Cylinder, protrusion

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