Bakker Hydraulic Products BDV 2020 User manual

OPERATING MANUAL
Grab Bucket BDV 2020

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© 2010 Bakker Hydraulic Products B.V.
Nijverheidsweg 6
6662 NG Elst (Gld) The Netherlands
Tel : + 31 481 374757 Fax : + 31 481 375280
Site : www.bakker-hydraulic.com E-mail : [e-mail]
Please read this manual carefully before using this product!
CONTENTS
1. OPERATIONAL CONDITIONS 3
2. ASSEMBLING/DISMANTLING:
2.0THE CONNECTOR PLATE 4
2.1THE ROTATOR 4
2.2THE HOSES FROM CRANE TO ROTATOR 5
2.3THE HOSES BETWEEN ROTATOR AND CYLINDER 5
2.4THE LINK 6
2.5THE DETACHABLE SIDE PLATES 6
2.6 USE OF THE HOISTING HOOK 6
2.7THE RUBBER JAWS 7
2.8THE SADDLE PLATE 8
2.9THE CYLINDERS 8
3. MAINTENANCE AND REPAIR 9
4. TROUBLE SHOOTING 9
TECHNICAL DATA 10/11
PARTS GRAB 12/13
PARTS CYLINDER 14/15

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© 2010 Bakker Hydraulic Products B.V.
Nijverheidsweg 6
6662 NG Elst (Gld) The Netherlands
Tel : + 31 481 374757 Fax : + 31 481 375280
Site : www.bakker-hydraulic.com E-mail : [e-mail]
1. OPERATIONAL CONDITIONS
Operation of the grab is prohibited unless the whole machine of which the
grab forms part has been deemed and certified as conforming to the
provisions of the Machine Guideline 98/37/EG (most recently amended
version).
This product is a universal grab bucket, which is also known as the Jack-
of-all-trades of grab buckets.
Wood, tree-branches, rubble, sand and gravel... this grab bucket can
tackle almost anything. Also ideal for excavation and digging in earth and
light clay.
Using detachable side plates, delivered separately, you can also use this
grab bucket to load gravel, grit, and the like.
Special separate rubber jaws can be supplied for moving complete
packages of tiles. These rubber jaws can be very easily fastened to the
grab bucket casing in a single action.
This product is not suitable for breaking asphalt, uprooting trees or loading
scrap onto lorries etc. if it is unevenly loaded (crowbar effect).
Notes :
When designing this product, account was taken not only of normal usage
but also of usage to be reasonably expected.
If the customer modifies the product without the manufacturer's
knowledge, the customer (the user) is liable for the consequences and the
guarantee becomes null and void.
Maintenance is, of course, permitted, providing it is carried out according
to the instructions provided in the manual.
Warning : Ensure that there are no people within working range of this
product when it is being used!
Caution : During transport, secure the grab bucket to the loading platform
or to the machine itself.
Take note of the maximum headroom!

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© 2010 Bakker Hydraulic Products B.V.
Nijverheidsweg 6
6662 NG Elst (Gld) The Netherlands
Tel : + 31 481 374757 Fax : + 31 481 375280
Site : www.bakker-hydraulic.com E-mail : [e-mail]
2. ASSEMBLING/DISMANTLING :
2.0THE SUSPENSION PLATE :
Assembly :
Place the suspension plate on the saddle plate. Check that the bolt-holes
in the suspension plate and the saddle plate correspond with each other.
Fit the 4 bolts and nuts) supplied. Tighten everything properly.
After using the product the next time, check the bolts for tightness and
retighten them if necessary.
N.B.:
Always fit the nut on top. Before fitting the suspension plate, determine
first how the hoses will run from your rotator to the cylinder.
2.1THE ROTATOR :
2.1.1 Assembling the rotator drive shaft :
Place the rotator drive shaft in the suspension plate.
If the outside measurements of the rotator shaft do not correspond with
the inside measurements of the suspension bush, you probably have the
wrong suspension plate for your rotator. If so, contact your supplier.
Rotate your rotator shaft until the hole in the rotator shaft is in front of the
suspension bush hole. After this, mount the suspension pin and the hairpin
spring.
2.1.2 Assembling the rotator with flange fitting :
If you are using a rotator with a flange fitting, the drill-hole pattern in the
saddle plate must correspond with the drill-hole pattern in the rotator.
Now, you just fasten the rotator to the saddle plate with a bolt joint,
according to the instructions of the rotator supplier.

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© 2010 Bakker Hydraulic Products B.V.
Nijverheidsweg 6
6662 NG Elst (Gld) The Netherlands
Tel : + 31 481 374757 Fax : + 31 481 375280
Site : www.bakker-hydraulic.com E-mail : [e-mail]
2.2THE HOSES FROM CRANE TO ROTATOR :
The rotator hose connections used for rotation are fitted with throttle
valves. You may not use the rotator without these throttle valves.
The hoses from the crane to the rotator used for rotation must be
connected to a connection point supplied with a throttle valve.
The hoses from the crane to the rotator, which are used for grabbing, must
be connected to the two remaining connection points on the rotator.
Note :
If it appears that the operation of the grab bucket and/or rotator does not
correspond with the data on your operating handles, then you have
probably connected the hoses incorrectly.
2.3The hoses between rotator and cylinder :
Note :
When using a rotator purchased from Bakker Hydraulic Products BV, the
hoses that connect this rotator and the hydraulic cylinder should be
ordered from the manufacturer. You can then be sure that the hoses are
the right length and diameter. If required, reinforced hoses can be supplied
as extras by and in consultation with the manufacturer.
2.3.1 Mounting the hoses on a rotator with drive shaft :
Fit a hose to one of the hose connections on the rotator shaft (ensure that
you have the right diameter hose). Now fasten the other end of this hose
to one of the connections on the cylinder.
Repeat this to connect the second hose.
Note :
If the grab bucket does not function properly after mounting the hoses,
swap around the hoses from the crane to the rotator. If the grab bucket still
does not operate to your complete satisfaction, contact the manufacturer
or your nearest dealer.
2.3.2 Mounting the hoses on a rotator with flange fitting
To fit the hose to the hose connection on the hydraulic cylinder, see
Section 2.4.1 above.
To connect the hose to the rotator, please refer to the rotator
manufacturer.

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© 2010 Bakker Hydraulic Products B.V.
Nijverheidsweg 6
6662 NG Elst (Gld) The Netherlands
Tel : + 31 481 374757 Fax : + 31 481 375280
Site : www.bakker-hydraulic.com E-mail : [e-mail]
2.4THE LINK :
Assembly :
A link is always mounted between the rotator and the jib of the crane.
Mount the link at the top of the rotator.
Mount the link pin and locking pin.
Check whether the link can move freely.
Connect and lock the link to the crane.
Note :
Make sure that there is as little sideways slack as possible. If necessary,
mount spacers.
2.5THE DETACHABLE SIDE PLATES :
Assembly :
A standard feature of the grab bucket is that it has holes for fastening
detachable side plates. The detachable side plates (one set = four plates),
which are supplied as extras, can be fixed to the sides of the grab bucket
by means of a few bolts.
To do this, mount two side plates to one side of the grabber and adjust
them so that the grab bucket closes properly (using the slotted holes in the
detachable side plates). Now tighten the bolts well.
Do the same on the other side of the grab bucket. Your grab bucket with
side plates is now ready for use.
Caution : Only use detachable side plates when loading loose
material!
2.6 USE OF THE HOISTING HOOK
Open the grab bucket completely and place it on a solid surface.
Disconnect the hydraulic hoses of the grab bucket (grab/rotator). Attach
the load to the hoisting hook using a chain suitable for the load. Now lift
the object to be hoisted in a controlled manner.
➢The grapple must rest on the surface at all times when
connecting and disconnecting the chain/noose to/from the
hoisting hook.

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© 2010 Bakker Hydraulic Products B.V.
Nijverheidsweg 6
6662 NG Elst (Gld) The Netherlands
Tel : + 31 481 374757 Fax : + 31 481 375280
Site : www.bakker-hydraulic.com E-mail : [e-mail]
➢When the hoisting hook is in use, no persons may be in the
danger zone (under or in close proximity of the grapple).
➢The load must always be straight below the hoisting hook.
Make sure that chains/nooses and such cannot come into
contact with the blades/jaws of the grapple.
2.7 THE RUBBER JAWS :
Assembly:
The rubber jaws are available as standard accessories in two different
versions and are fitted with rubber (70shore):
- Total length = 1200 mm.
- Total length = 1700 mm.
When mounting the tile jaws, ensure that the grab bucket is in the open
position.
Lay the tile jaws on the ground with the rubbers opposite each other,
roughly 1400 mm apart.
Position the grab bucket above the rubber jaws and slowly lower it until the
blades of the grab bucket are in the appropriate position for the rubber
jaws.
After this, slide the hooks (on the load binders) over the top of the side
panel.
Now hook the chain of the rubber jaw to the load binder and tighten and
lock the whole structure.
Make sure that the rubber jaw is not loosely suspended.
Note :
When ordering the above rubber jaws, always specify the type and width
of the grab bucket to which the rubber jaws must be mounted.
Also specify the required length of the rubber jaws.
If the rubbers are worn, they must be replaced with new ones.

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© 2010 Bakker Hydraulic Products B.V.
Nijverheidsweg 6
6662 NG Elst (Gld) The Netherlands
Tel : + 31 481 374757 Fax : + 31 481 375280
Site : www.bakker-hydraulic.com E-mail : [e-mail]
2.8 THE SADDLE PLATE :
2.8.1 Dismantling the saddle plate :
Undo the two M10 bolts and remove the so-called "locking spanner",
which is fastened to the bottom strip of the saddle plate.
Use this spanner to undo the two locking nuts.
Undo the two M10 bolts and remove the two shafts.
Now the saddle plate can be removed without any problems.
2.8.2 Assembling the saddle plate :
Assemble the saddle plate in the reverse order to which you dismantled it.
2.9 THE CYLINDERS :
Removing the cylinder :
Place the grab bucket in the closed position and make sure it is stable.
Remove the pins at each end of the cylinder.
Pull in the piston rod with the aid of oil pressure and make sure when
doing so that the cylinder ends are protected from damage.
Once this has been done, the cylinder can be removed in its entirety.
Dismantling the cylinder :
Unscrew and remove the head bush.
When the head bush is removed, carefully remove the piston rod.
Caution!
Take care not to damage the piston rod.
To replace the seals, you must first remove the outer cylinder tube.
The non-return valve can be removed and mounted at all times without
any problems, providing there is no pressure on the cylinder.

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© 2010 Bakker Hydraulic Products B.V.
Nijverheidsweg 6
6662 NG Elst (Gld) The Netherlands
Tel : + 31 481 374757 Fax : + 31 481 375280
Site : www.bakker-hydraulic.com E-mail : [e-mail]
Reassembling the cylinder :
Assemble the cylinder parts in the reverse order to which you dismantled
them.
N.B.:
When mounting the head bush, you must use Loctite type 243 or a
comparable locking agent.
3. MAINTENANCE AND REPAIR
- Check the hoisting hook visually once a year, and test the hook once
every 4 years with an 6500 kg load divided into 4000 kg per hook.
- Test the non-return valve once a year to ensure that it is working
properly.
- Check pins and bushes every year for slack (maximum 0.8 mm).
- If the exchangeable blades are worn, they must be replaced by new
blades (maximum 25 mm per blade edge).
- Regularly grease the pivots (steady link, cylinder suspension and pins)
to prevent penetration of sand, dirt, etc.
- After 20 working hours, check all bolted connections and tighten if
necessary.
Caution!
With all maintenance activities on the grab bucket, the grab bucket must
be non-operational and stationed on the ground.
4. TROUBLESHOOTING
Problem : Load is no longer held.
Possible causes :
- Non-return valve and/or seals
- Piston seals worn
- External leakage’s to cylinder tube
Tips for tracing faults :
- The cylinder may not display any external leakage’s. If it does,
check that the head bush is tight. If the head bush is loose,
the seals must be replaced.

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© 2010 Bakker Hydraulic Products B.V.
Nijverheidsweg 6
6662 NG Elst (Gld) The Netherlands
Tel : + 31 481 374757 Fax : + 31 481 375280
Site : www.bakker-hydraulic.com E-mail : [e-mail]
- With the grab bucket in the open position, disconnect the
hoses from the crane and check whether the grab bucket
automatically closes when freely suspended.
If it does :
- the non-return valve and/or seals are/is defective
- check the piston seals and replace if necessary.
TECHNICAL DATA :
Grab type : BDV 2020
Width : 65 cm 90 cm 120 cm
80 cm 100 cm
Capacity : 300 L 450 L 600 L
400 L 500 L
Weight : 340 kg 415 kg 505 kg
385 kg 545 kg
Max. working pressure : 200 Bar
Press strength : 30 kN

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© 2010 Bakker Hydraulic Products B.V.
Nijverheidsweg 6
6662 NG Elst (Gld) The Netherlands
Tel : + 31 481 374757 Fax : + 31 481 375280
Site : www.bakker-hydraulic.com E-mail : [e-mail]
Max. hoisting load:
Maximum oil flow in non-return valve: 40 L./min.
4000 KG
2000 kg
3150 Kg

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© 2010 Bakker Hydraulic Products B.V.
Nijverheidsweg 6
6662 NG Elst (Gld) The Netherlands
Tel : + 31 481 374757 Fax : + 31 481 375280
Site : www.bakker-hydraulic.com E-mail : [e-mail]
BDV-2020

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© 2010 Bakker Hydraulic Products B.V.
Nijverheidsweg 6
6662 NG Elst (Gld) The Netherlands
Tel : + 31 481 374757 Fax : + 31 481 375280
Site : www.bakker-hydraulic.com E-mail : [e-mail]
Pos.
Part number
Specification
Quantity
1
75177
Frame
1
2
75473
Clamshell
1
2-1
75506
Clamshell
1
2-2
9024
Blade
2
2-3
9025
Bolt
See chart
2-4
9003
Split bush
4
3
7102
Shaft
2
4
7101
Pin
2
5
7105
Pin
2
7
7104
Pin
1
8
75214
Saddle plate
1
9
75049
Hoisting hook
2
10
7114
Locking spanner
1
11
7434
Steady link
1
11-1
7339
Slide bearing
2
12
7103
Pin
1
13
7338
Slide bearing
2
30
9413
Bolt
8
35
9205
Nut
2
38
75221-16
Locking washer
8
40
75854
Cylinder
2
Grab type BDV-65 BDV-80 BDV-90 BDV-100 BDV-120
Number of bolts 9025
10 10 14 14 18

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© 2010 Bakker Hydraulic Products B.V.
Nijverheidsweg 6
6662 NG Elst (Gld) The Netherlands
Tel : + 31 481 374757 Fax : + 31 481 375280
Site : www.bakker-hydraulic.com E-mail : [e-mail]
POS
PART NUMBER
SPECIFICATION
1
7435
SLEEVE BEARING
2
7436
SLEEVE BEARING
3
1919059
CYLINDER SEALS
4
1919062
CYLINDER CASING
5
1919060
PISTON
6
1919061
PISTON ROD
7
1919063
HEAD BUSH

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© 2010 Bakker Hydraulic Products B.V.
Nijverheidsweg 6
6662 NG Elst (Gld) The Netherlands
Tel : + 31 481 374757 Fax : + 31 481 375280
Site : www.bakker-hydraulic.com E-mail : [e-mail]
POS
PART NUMBER
SPECIFICATION
1
1919207
BRAKE VALVE COMPLETE SET
2
3100001
NON-RETURN VALVE COMPLETE SET
COMPLETE SET
3
7436
SLEEVE BEARING
4
7435
SLEEVE BEARING