Farmi Forest CR47 Guide

HYDRAULIC CRANE
CR47
OPERATION, MAINTENANCE
AND SPARE PARTS MANUAL
PLEASE READ THE OPERATING AND MAINTENANCE
INSTRUCTIONS BEFORE YOU OPERATE THE MACHINE.
FROM MACHINE: CM00001
TRANSLATION OF THE INSTRUCTION MANUAL
A-EN-271119-ER

2CR47

3CR47
TABLE OF CONTENTS
EC DECLARATION OF CONFORMITY 5
INTRODUCTION 6
WARNING SYMBOLS IN THIS MANUAL 6
PRODUCT WARRANTY 6
CUSTOMER FEEDBACK 6
WORKSITES 7
WORKING IN CLOSE PROXIMITY TO POWER LINES 7
GENERAL SAFETY INSTRUCTIONS 8
STARTING 8
TRANSPORT 9
OPERATION 9
MAINTENANCE 10
OILS AND LUBRICATION 10
SAFETY INSTRUCTIONS FOR HYDRAULIC CIRCUITS 10
SAFETY INSTRUCTIONS FOR CRANES 12
CONTACT WITH POWER LINES 12
WHAT TO DO IN THE EVENT OF PERSONAL INJURY 12
MAIN PARTS 13
TECHNICAL DATA 14
DIMENSIONS 14
LIFTING REACH 15
LIFTING CAPACITY 15
LIFTING 16
GENERAL ASSEMBLY AND INSTALLATION INSTRUCTIONS 16
MOUNTING THE CRANE ON THE SUPPORT LEGS 17
MOUNTING THE CRANE TO A TRACTOR (THREE-POINT LINKAGE) 18
LEC CONTROL VALVE INSTALLATION 18
HYDRAULIC SYSTEM CONNECTION 19
RELEASING PRESSURE FROM THE RETURN HOSE 20
INSPECTION PRIOR TO USE 20
TEST RUN 21
OPERATION 22
WORKING IN EXCEPTIONAL TEMPERATURES 22
LIFTING, MOVING AND LOWERING LOADS 23
MOVING THE TRAILER-CRANE COMBINATION 23
DEMOUNTING THE CRANE FROM THE THREE-POINT LINKAGE 24
STORAGE INSTRUCTIONS 24
MAINTENANCE 25
BOOM ASSEMBLY 25

4CR47
BUSHINGS REPLACEMENT 25
PRESSURE MEASUREMENT 25
GEAR RACKS ADJUSTMENT 26
SLEWING DEVICE OIL CHANGE 27
LUBRICATION 28
LUBRICATION POINTS 29
HYDRAULIC OIL CHANGE 30
HYDRAULIC OIL REQUIREMENTS 30
MACHINE DISPOSAL 30
TROUBLESHOOTING 31
200004411 HYDRAULIC SUPPORT LEGS 32
CR47 34
CR47, SLEWING AND COLUMN 36
CR47, FOLDING BOOM 38
200001715 CROSS LINK, WITH DOUBLE BRAKE 41
200002614 ROTATOR CR404S-W25A30 42
200002801 TIMBER GRAPPLE PTK021S / CR300 44
WARRANTY 47
PRODUCT REGISTRATION FORM 48

5CR47
Manufacturer:
Farmi Forest Corporation
Ahmolantie 6, FIN-74510 IISALMI, Finland
Person authorized to compile the technical documentation:
Name: Petri Pelkonen
Address: Ahmolantie 6, FIN-74510 IISALMI, Finland
Commercial name:
Farmi
Machine denomination:
Hydraulic crane
Machine type:
CR47
Machine series number:
This machine meets all technical standards and safety regulations of EU Machinery
Directive 2006/42/EY and its amendments.
Iisalmi 27.11.2019
(Place) (date)
Ilkka Kuuramaa
EC DECLARATION OF CONFORMITY
Original declaration of conformity

6CR47
WARNING
IMPORTANT
ATTENTION
WARNING SYMBOLS IN THIS MANUAL
• imminent danger which could cause serious personal injury or death
• danger which could cause personal injury
• conditions or misuse that could damage equipment or machinery
• reminders, such as for performing checks or carrying out maintenance or repair
procedures
INTRODUCTION
This manual includes the information and maintenance instructions required for operating the machine in the optimal
manner.
Although you have experience in using this kind of machinery, read the operation and maintenance instructions careful-
ly since they include information enabling ecient and safe operation. Regular maintenance is the best way to guarantee
the ecient and economical performance of the machine.
Each and every operator must read, understand, and follow all safety instructions and
procedures.
CUSTOMER FEEDBACK
We are happy to receive your opinions and suggestions for improvements by mail, fax or e-mail.
All implemented suggestions for improvements will be rewarded.
PRODUCT WARRANTY
Farmi provides a 12-months warranty on all Farmi products.
Register on our home page farmiforest./en/products/ within 30 days after the receipt of the product to get full product
warranty and additional information on your product. If it is not possible for you to register via internet, please register
as follows: Complete the registration form on the last pages of this manual and return it to us within 30 days after the
receipt of the product.
ATTENTION

7CR47
WORKING IN CLOSE PROXIMITY TO POWER
LINES
Avoid working in close proximity to power lines. If, ho-
wever, you are forced to work near power lines, the dis-
tance from them must always be at least 5 metres + 20 m
of the crane work area.
Always exercise extreme caution
when working near power lines.Ob-
serve minimum safety distances.
The minimum safety distance table
is attached to the valve rack (LEC).
Ensure that you observe the regulations of the country
you are in when working near power lines.
Electricity will always ow to ground if it is given a sui-
table path.
1. Contact the local power company if you will be working
in the immediate vicinity of overhead power lines. If
necessary, ask the power company to send an expert
to the worksite.
2. Remember - electricity does not always require direct
contact to be a hazard. High voltage electricity can
'jump' as much as 5 metres from a power line.
3. Never go near power lines! No part of the crane should
ever be allowed to go closer to overhead power lines
than the minimum safety distance - not even acciden-
tally. Familiarise yourself with the minimum safety
distance specied in local electrical safety regulations.
4. If it is dicult to comply with minimum safety distance
regulations when working, you must contact the local
power company.
CRANE PRESENTATION AND
INTENDED PURPOSE
The CR47 hydraulic crane is specically designed for the
loading of timber. The crane may not be used for towing,
lifting general cargo or lifting personnel.
The crane can be equipped with hydraulic support legs,
which are used to mount the crane to a forest trailer or a
three-point linkage on a tractor.
WORKSITES
A worksite with a level and rm surface should be used.
Avoid working on sloping terrain.
Reserve an adequate amount of working space for the
crane and transport equipment.
When moving over terrain, keep the limitations of the
base machine in mind.
WARNING

8CR47
GENERAL SAFETY
INSTRUCTIONS
These safety instructions are meant for the owners of
FARMI machine, as well as those who operate, service or
repair it.
The instructions help with:
• using the machine safely, appropriately and eecti-
vely.
• identifying, avoiding and preventing potentially dan-
gerous situations.
The manufacturer supplies an operation manual, which
must always be available at the place of operation of the
machine. Each user must read the safety, maintenance and
operating instructions before operating the machine, and
comply with these instructions at all times.
Ensure that every operator of the
machine is familiar with the content
of the operation manual and situa-
tion-specic safety instructions,
and has been suitably trained before
operating the machine.
The machine complies with technical requirements and
applicable safety regulations. However, incorrect use,
maintenance or repair of the machine may cause risks.
In addition to the operation manual, remember to comply
with regulations of the local occupational health and safe-
ty authorities, and with your country’s laws and decrees.
The manufacturer is not liable for damages caused
by:
• incorrect, negligent or inappropriate use of the pro-
duct.
• non-original spare parts.
• normal wear and tear.
• misuse caused by an untrained person’s improper
actions.
• alterations made without the manufacturer’s permis-
sion.
Written authorization must be
requested from the manufacturer for
any alterations to the machine.
STARTING
Please read the operating instruc-
tions carefully before using, main-
tenance or repairing the machine.
Observe all operating and safety
instructions when-ever using the
machine.
1. Familiarize yourself thoroughly with the use,
operation and controls of the machine and its equip-
ment before starting.
2. Familiarize yourself with the capacities and
limitations of the machine and its equipment.
3. Do not use the machine unless you are completely famili-
ar with its operation.
4. Be aware of the machine’s danger zones.
5. During operation, prevent bystanders from entering the
danger zone. If necessary, work must be stopped.
6. Ensure that each operator has the necessary safety equip-
ment, such as a helmet, safety goggles, work safety
boots and suitable protective clothing.
7. Never wear loose clothing around moving parts.
Protect long hair!
8. Ensure that work is carried out according to the
stipulations of applicable occupational health and sa-
fety legislation.
9. Before starting up or using the machine, ensure that it
cannot cause a risk to other people or property.
10. Perform a safety check on the machine before every use.
If you observe any faults or deciencies, repair the
machine immediately.
11. Before operating the machine, ensure that there are no
foreign articles in it.
12. Place the machine on a hard, level surface for operation.
In the winter avoid working in slippery areas.
13. Before mounting and using the machine, check the PTO
drive shaft for correct condition and attachment.
14. Never use a faulty or decient machine.
15. Using the tractor lower link arms to mount the top link
is prohibited. The top link is to be mounted by ad-
justing its length.
ATTENTION
ATTENTION
ATTENTION

9CR47
TRANSPORT
1. Before driving with the machine, ensure the safe
mounting of the machine. Make sure that the jour-
nals are seating correctly and that the pins are tight.
Check the tension of the lower link stabilizers.
2. Before driving with the machine, make sure that
the required lamps and reectors as well as the slow
moving vehicle sign are attached correctly. Moreover,
the lamps should be checked for correct functioning.
3. Before driving with the attached machine, make sure that
the hydraulic unit of the machine is depressurized
(unless otherwise instructed in the operating instruc-
tions).
4. When driving on public roads, always observe the valid
trac regulations. The travel speed must be adapted
to the specic conditions.
5. When driving, please take into consideration the
additional mass resulting from the machine’s weight.
It may aect the reactions, the steerability and the
braking function of the tractor.
6. Please note that the machine rear sways when
turning.
7. Pay attention to the machine’s height near bridges or ot-
her height restricting objects.
8. When backing o, the machine may obstruct the rear
view. Exercise extreme caution. If necessary, ask
a agman to help you; he can indicate the required
distances.
9. It is prohibited for other people to ride on the
machine.
OPERATION
Many occupational accidents take
place in abnormal circumstances.
Therefore it is important to take into
account all the possible circumstan-
ces that may arise during operation
of the machine.
The machine’s operator must have
constant, unobstructed visibility of
the work area. If this is not possible,
the operator must work with an as-
sistant.
1. Depending on the machine’s type, it will have
diverse safety devices and protectors. These are
meant to protect the machine and its operator, and
they must never be removed or altered. Never start
up or use the machine without all the safety devices
and protectors in place.
2. Also check the universal joint’s safety equipment
and joints.
3. Never insert any body part into the machine with the
engine running.
4. If any faults arise that may jeopardize occupational safety,
turn o the machine.
5. During operation, the machine’s operator is
responsible for safety in the whole work area. Work
may not be carried out in the presence of any factors
that jeopardize occupational safety.
6. Exercise extreme caution when hitching/unhitching the
machine from a tractor/trailer.
7. Look out for moving parts when the machine is in
operation.
8. Secure the machine against unauthorized and acciden-
tal operation (e.g. moving when parked) whenever
it is left unattended.
9. Never leave the machine running unattended.
10. Avoid causing fast, stroke-like loading.
11. Never exceed the given operating values.
12. All safety and warning signs on and in the machine must
be legible and intact.
13. The machine may not be operated by persons who are
unwell or under the inuence of drugs or alcohol.
WARNING
ATTENTION
The noise level from the engine
should not exceed 70 dB. Check the
engine noise and wear ear protection
if it exceeds 70 dB.
ATTENTION

10 CR47
MAINTENANCE
1. The machine may only be serviced and repaired
by professionals.
2. Electrical and hydraulic faults may only be repaired
by authorized professionals.
3. In cases requiring welding, contact the manu-
facturer.
4. When servicing the machine, place it on a level
surface and ensure that it cannot be moved.
5. Turn off the tractor engine and disconnect the
PTO drive shaft before beginning service or mainte-
nance actions.
6. Before any maintenance work, turn the main
power switch of the tractor to OFF.
7. Take out the key from the tractor’s ignition for the
duration of the servicing or maintenance. Check that
the power is o from the machine you are working
on.
8. Before disconnecting the hydraulic hoses from
tractor, ensure that the hydraulic system is
depressurized.
9. Observe the service intervals and annual safety
inspections.
10. All spare parts and equipment must fulll the manu-
facturer’s requirements. This can be guaranteed by
using original parts.
11. Put all safety devices back into place immediately
once servicing or maintenance is complete.
When lifting the machine, check that
the lifting/hoisting equipment is in
perfect working order. Check the
weight of the machine before lifting
it.
Choose lifting trajectories so that
they do not cause any danger.
Many countries have specific legislation on lifting,
hoisting cables and hoists. Always comply with local safety
regulations.
OILS AND LUBRICATION
1. Always use the oil types recommended by the
manufacturer. Other types of oil may cause faults or
improper operation of the equipment, which could
lead to serious damage to people or property.
2. Never mix dierent liquids or oils.
3. Always follow the manufacturer’s lubrication
instructions.
4. Use control equipment carefully until the hydraulic oil has
had time to reach its operating temperature.
SAFETY INSTRUCTIONS FOR HYDRAULIC
CIRCUITS
1. Work on hydraulic equipment may only be carried out by
professional hydraulic engineers.
2. Be cautious when using the equipment in cold
conditions.
3. Check the machine for leaks. Do not use the
machine if there is a leak from any system. Check
all hydraulic hoses – particularly those which are
bent during use – and replace any that are in poor
condition or have leaks. Ensure that all joins are tight
and that the lines are not damaged. Check that all
protective caps and ller caps are closed properly.
Check the hose sheathing for damage.
4. Check that all hose connectors, lengths and qualities
comply with applicable requirements. When replacing
or repairing hoses, use original parts or hoses and
connectors recommended by the manufacturer. Check
particularly that the pressure classes of the hoses
and connectors are suitable to the operating pressure
levels.
5. Check that all safety devices such as pressure relief
valves, etc., are in place and work properly. Familiarize
yourself with their use. Safety systems may never be
bypassed.
6. Check the main hydraulic parts daily, and always after
a fault. Replace any damaged parts immediately.
7. If a component is damaged, clean it before repairing
it. Do not use solvents when cleaning parts.
8. Do not attempt to carry out repairs that you are not
fully familiar with.
9. Never carry out repairs of the hydraulic circuit when
the system is pressurized. When pressurized, the oil
spray can penetrate the skin and cause mortal danger.
10. Never work below a device or component that is only
being held up by hydraulics. Use separate supports
when carrying out maintenance or repairs. Do not
disconnect cylinders or their valves until the machine
is well supported.
11. Most hydraulic oils do not evaporate easily. Risk fac-
tors include hot oil, spills and oil mist (pressurized).
12. If oil gets into your eyes, rinse with plenty of water
and contact a doctor.
ATTENTION

11CR47
13. Avoid prolonged or repeated oil contact with your skin.
14. If sprays or contact with the skin cannot be avoided, use
protective gloves, goggles and clothing as necessary.
Do not use oily clothing.
15. Avoid discharging hydraulic oil into the environment,
as it can pollute waterways and the groundwater. If
biodegradable oil is to be used, contact the manufac-
turer beforehand and have the suitability of your
equipment for the operation with biodegradable oil
conrmed by him before such oil is used.
16. Store the oil in sealed containers provided by the
manufacturer. Try to transfer the oil directly from its
container into the tank.
17. If the oil must be passed through other containers,
ensure that they are completely clean. Caps, funnels,
sieves and lling holes must also be clean.
18. Never store oil outdoors, as water could condense in it.
19. Always dispose of oil in a suitable container, never into
the environment!

12 CR47
Voltage rating, kV Minimum distance, m
Overhead line Pendant line
below on side
<1 2 2 0,5
1-45 2 3 1,5
110 3 5 -
220 4 5 -
400 5 5 -
SAFETY INSTRUCTIONS FOR
CRANES
1. Ensure the machine is properly supported during
storage.
2. Before starting the machine, ensure that there are
no personnel within a radius of 20 metres.
3. During operation, the vehicle must be positioned
on suciently solid ground, in a properly stable po-
sition. The support legs must be used in all circum-
stances.
4. Always put on the parking brake during loading.
5. Do not exceed the given load values.
6. Never stand beneath a hanging load.
7. Do not leave booms in raised position unattended!
8. The crane must not be used for lifting personnel.
9. The crane must not be used to tow or lift general
cargo.
10. Do not run the machine’s movements to their
extremes at full speed.
11. When lifting, note that the booms sag slowly.
12. If the booms sag under excess loading, use the
folding boom to move the load closer to the column.
Do not open the grapple.
13. Take particular care when lifting heavy loads and
turning the crane to the side.
14. If the combination begins to tip, lower the load to
the ground immediately. Do not drop the load by
opening the grapple. Do not jump o of the vehicle.
CONTACT WITH POWER LINES
When working in the proximity of live wires, always ad-
here to the given safety distances (cf. table).
If the machine comes into contact with a power line, do
the following:
1. Call for assistance immediately and ensure that no
one enters the danger zone.
2. If you are outside the machine, do not touch any
part of the machine.
3. If you are inside the machine, leave it by JUMPING
OUT. When you jump, make sure both feet touch the
ground at the same time. Do not touch the vehicle or
the ground with your hands after jumping out. Move
at least 20 meters away from the vehicle by hopping
on two feet.
4. Contact emergency rescue services immediately.
WHAT TO DO IN THE EVENT OF PERSONAL
INJURY
1. If you arrive at the scene of an electrical accident,
do not put your own life in danger by taking unsafe
measures.
2. First, determine whether high voltage or low
voltage is involved.
3. If high voltage is involved, do not attempt any
rescue until the power company has shut o the po-
wer. Even approaching a victim who has come into
contact with a power line or piece of equipment
touching a power line can be dangerous. Remember
that a high voltage line does not "just blow a fuse" - it
remains dangerous until a professional de-energises
it.
4. You can remove a victim who has come into contact
with a low voltage line or piece of equipment touch-
ing the power line using a dry rope or dry, unnished
wood pole or board. Try to stay as far away as pos-
sible. Do not touch the victim until they have been
completely removed from the live lines or equipment.
5. If the victim is unconscious, begin performing
cardiopulmonary resuscitation (CPR) immediately.

13CR47
12
10
9
6
4
3
2
1
11
5
7
8
MAIN PARTS
1. Slewing device
2. Column
3. Lifting boom
4. Folding boom
5. Extension boom
6. Lifting cylinder
7. Folding cylinder
8. Extenxion cylinder
9. Cross link + rotator
10. Grapple
11. Grapple cylinder
12. Control valve

14 CR47
1300
3070
1850
6945
41
1106
TECHNICAL DATA
DIMENSIONS
CR47
Outreach, m 6,9
Gross lifting torque, kNm, 190 bar 46
Slewing torque, kNm 12
Slewing angle, o360
Weight, kg** 630
Cross link CDBL7325
Rotator CR305
Grapple PTK021
Lifting cylinder Ø100/50
Folding cylinder Ø80/40
Extension cylinder Ø40/28
Recommended pump capacity, l/min 30-60
**excluding link, rotator, grapple and valve
We reserve the right to make changes and revise the data without prior notice.

15CR47
3 4 5 6 6,9 m
840 450690 5501130 kg (190 bar)CR47
0 1 2 3 4 5 6 7
0
-1
-2
-3
1
2
3
4
5
6
7
8
9
CR47
LIFTING REACH
LIFTING CAPACITY

16 CR47
LIFTING
Lifting points for each machine
are marked with hook symbols.
1. Lift only using the proper type of lifting device and ensu-
re that it has an appropriate lifting capacity.
2. Check the lifting slings, cables, and chains regularly.
3. Ensure that you know the weight of the load to be lifted
and never exceed the lifting capacity stated by the
manufacturer of the lifting device.
4. Select the transport routes for lifting so that the
load is not transported over people or a location
where people might be.
GENERAL ASSEMBLY AND
INSTALLATION INSTRUCTIONS
Read the assembly and installation
instructions before beginning as-
sembly and installation.
Improper assembly and installation
can result in dangerous situations
when using the crane.
Failure to follow the manufacturer's assembly and
installation instructions can pose a hazard to the
user and void the warranty.
If the crane is mounted on a trailer,
the combination must not be lifted
using only using the lift points on the
crane - lifting equipment must also
be secured to the trailer. If the com-
bination is lifted from the crane, it may be damaged
due to excessive load placed on it.
ATTENTION
ATTENTION
WARNING

17CR47
36
19 A = 6 x M24x2x120, DIN912, 10.9ZN
B = 2 x M24x2x90, DIN912, 10.9ZN
C = 6 x M24x2, DIN985, 10,9ZN
A
C
650
B
Remember to re-tighten the
screws after the rst test run and
rst work day.
ATTENTION
MOUNTING THE CRANE ON THE
SUPPORT LEGS
1. Clean the threads and check the size and property
class of the mounting screws (see gure).
2. Mount the crane on the support leg frame with
six (6) M24x2x120 hex screws (A), two M24x2x90
hex screws (B) and six locking nuts (C). Tighten to
650 Nm.

18 CR47
MOUNTING THE CRANE TO
A TRACTOR (THREE-POINT
LINKAGE)
Exercise extreme caution when
mounting or demounting a crane.
Tipping hazard!
When the crane is in its storage position (supported
by the support legs and boom assembly), mount the crane
to a tractor according to the following instructions.
1. Back up the tractor carefully until the lower link arms are
lined up with the brackets in the support leg frame.
2. Install the control valve or levers in the tractor
cab. Use the control valve lifter (accessory).
3. Connect the crane pressure and return hoses to the trac-
tor hydraulics. Follow the tractor manufacturer's
instructions.
4. Install the journals and pins in the support leg frame brac-
kets.
5. Mount the top link arm. Using the tractor link arms to
mount the top link is prohibited. The top link must
be mounted by adjusting its length.
6. If the tractor lower link arms are too high, do the follo-
wing: Ensure that no personnel are between the trac-
tor and crane. Climb into the tractor cab and lower
both support legs carefully until the crane rises to
the right height. Exercise extreme caution - the crane
is not coupled to the tractor's three-point linkage!
Never operate the crane valve from anywhere else
than the cab,
7. Lock the lower link arms stabilizers.
Ensure that the pressure and return
hose is connected correctly.
LEC CONTROL VALVE
INSTALLATION
1. Ensure that the valve mounting plate is straight. The
control valve must be mounted on the plate securely
enough to withstand the strain of moving over rough
terrain and remain rmly in place when being used.
2. If possible, install the control valve in its dedicated
housing or inside the tractor, so that the levers can be
operated with the rear window closed.
3. Pay attention to the protection of the levers.
The levers must be protected so that they are not
inadvertently moved.
The control valve mounting rack has
a label showing the minimum safety
distances to live power lines. This
label must be kept fully visible to the
crane's operator.
WARNING
ATTENTION
ATTENTION

19CR47
HYDRAULIC SYSTEM
CONNECTION
1. Check the oil compatibility before connecting the
crane to the tractor hydraulic system. The crane has
been test run with Teboil 46S hydraulic oil.
2. If the crane and tractor hydraulic systems are sepa-
rate, you may use oils according to the recommenda-
tions given in the maintenance instructions.
3. The pump must not be allowed to run before the
control valve has been connected to the tractor and
crane hydraulic systems.
4. We recommend connecting the pressure hose to
the single-acting hydraulic outlet and the return hose
to the tank via the return lter. The lter’s intended
minimum ow rate is 80 l/min and the ltering den-
sity is 25 μm abs. Ensure that the tank breathing is
not disturbed. Insert the return hose below the oil ll
level. CAUTION! If you accidentally install the hoses
the wrong way around, release the pressure using the
quick coupling. Use eye protection and other perso-
nal safety gear.
5. You can also connect the crane to the double-
acting hydraulics outlet, where the pressure and re-
turn hoses are connected to their own couplings. If
this option is used, ensure that the lever of the doub-
le-acting valve is in the right position, with the pres-
sure being directed to the pressure connection of the
crane’s control valve. Check the tractor instructions
for use of the double-acting hydraulics outlet.
6. Ensure that the pressure and return hose quick
couplings are locked during installation.
7. The hydraulic pressure-controlled valve also has
another return hose, which should be connected to
the free return line. Filtering/counterpressure is pro-
hibited.
8. CAUTION! If the return line quick couplings are
not connected or locked properly, the pressure in the
tank line may rise and cause damage to the control
valve.
9. CAUTION! Never connect pressure to the return
line of the control valve. This can damage the control
valve.
10. A breather lter must also be installed in the system.
This prevents large dirt particles from entering the
hydraulic oil. Despite the use of a breather lter, dirt
particles can still enter the oil tank with the intake
air. Foreign particles are hazardous, as the pump and
valves function at extremely high tolerances.
11. CAUTION! Remember to maintain cleanliness when-
ever working on hydraulics! The hydraulic system
to which the crane is connected must be absolutely
clean.
12. The hoses must be placed and protected to prevent
them from rubbing, twisting and getting trapped
between moving parts.
13. If the pressure hoses are routed to the tractor cab,
they must be covered, so that, in the event of any
breakage, the resulting oil spray will not hit the ope-
rator.

20 CR47
PRESSURE
PAINE
TRYCK
RELEASING PRESSURE FROM
THE RETURN HOSE
If you accidentally connect the pressure and return hose
the wrong way around, the pressure remaining in the re-
turn line between the check valve and quick coupling will
prevent the oil from owing through the valve. Pressure
can also accumulate in the return line during long-term
storage. Pressure in the hose prevents the quick coupling
from opening. If necessary, the pressure can be released
as follows:
Open the quick coupling carefully until the oil begins to
drip out of the coupling. Let the pressure drop slowly.
WARNING
You must absolutely wear protective
eyewear and gloves.
Exercise extreme caution, as the oil is
pressurised in the hose.
INSPECTION PRIOR TO USE
1. Check the oil level of the hydraulic oil reservoir.
2. Ensure that the 1/2” quick coupling is locked.
3. Do not pressurise the hydraulic system until the cont-
rol valve's 1/2" quick couplings have been connected
to the tractor's hydraulic system. (The arrow on the
pressure hose (P) indicates the direction to the valve
and the arrow on the return hose (T) indicates the
direction to the tractor.)
4. Ensure that the hoses move freely. Remove any
transport supports and bindings.
5. Learn the control valve functions.