Bakker Hydraulic Products RLO User manual

OPERATING MANUAL
Grab Bucket RLO

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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:
2.1 THE CONNECTOR PLATE 4
2.2 THE ROTATOR 4
2.3 THE HOSES FROM CRANE TO ROTATOR 4
2.4 THE HOSES BETWEEN ROTATOR AND CYLINDER 5
2.5 THE LINK 5
2.6 THE DETACHABLE SIDE PLATES 5
2.7 THE RUBBER JAWS 6
2.8 THE SADDLE PLATE 7
2.9THE CYLINDER 7
3. MAINTENANCE AND REPAIR 8
4. TROUBLE SHOOTING 8
TECHNICAL DATA 9
DIMENSIONAL DRAWING 10
PARTS GRAB 11/14
PARTS CYLINDER 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
This product is a universal grab bucket, which is also known as the Jack-of-all-trades
of grab buckets and is considered an exchangeable equipment within the scope of the
machinery directive 2006/42/EC. Be sure that the machine, of which this grab will be
part of, meets the appropriate requirements and/or regulations and is well maintained.
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.
As this grab is equipped with welded hooks it is also possible to lift goods. The user
has to use approved hoisting equipment (chains, hoisting hooks etc.).
* If this grab is also being used to lift loads that are held by the compressive force
exerted by the grab, a non-return valve has to be installed. It must be fitted directly
onto the connections on the cylinder (in other words not by means of a hose
connection). This valve can be supplied as an accessory with the grab.
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:
2.1 THE CONNECTOR PLATE:
Assembly:
Place the connector plate on the saddle plate.
Check that the bolt-holes in the connector 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 connector plate, determine first how the
hoses will run from your rotator to the cylinder.
2.2 THE ROTATOR:
2.2.1 Assembling the rotator drive shaft:
Place the rotator drive shaft in the connector plate.
If the outside measurements of the rotator shaft do not correspond with the inside
measurements of the connector bush, you probably have the wrong connector 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 connector
bush hole. After this, mount the connector pin and the hairpin spring.
2.2.2 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.
2.3 THE 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.

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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]
2.4 THE 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.
2.4.1 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.
2.4.2 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.
2.5 THE 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.
2.6 THE 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!

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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]
2.7 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 CYLINDER:
Removing the cylinder:
Place the grab bucket in the closed position and make sure it is stable.
Unscrew the nuts 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.
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.

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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]
3. MAINTENANCE AND REPAIR
- Check the weld-on hooks visually once a year, and test them once every 4 years
with an 8000 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).
- 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
Tips for tracing faults:
- The cylinder may not display any external leakages. If it does, check that the head
bush is tight. If the head bush is loose, it has to be secured using Loctite type 243
or a similar product.
-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.

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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]
TECHNICAL DATA:
Grab type : RLO
Width : 60 cm 80 cm 100 cm
70 cm 90 cm 120 cm
Capacity : 275 Ltr 400 Ltr 500 Ltr
335 Ltr 450 Ltr 600 Ltr
Weight : 275 kg 310 kg 345 kg
290 kg 325 kg 380 kg
Max. working pressure : 250 Bar
Press strength : 20 kN
Max. hoisting load :
Maximum oil flow in non-return valve: 40 L./min.
4000 kg
1250 kg¹
¹ Only when a non-return valve is being used

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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]

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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]
RLO 55-65-80
7028
9205
7011
7007
7023
7040
7006
9204
9206
9203
90127022 9202 9013 90189011 9010
9017
7003
7004
7010
9003

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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]
PART NOQUANTITY SPECIFICATION
7003 1 STEADY LINK
7004 2 PIN
7006 2 YOKE
7007 4 PIN
7010 2 SPLIT BUSH
7011 4 SPLIT BUSH
7022 1 NUT
7023 1 NUT
7028 2 ROLL PIN
7040 1 CYLINDER
9003 4 SPLIT BUSH
9010 1 CONNECTOR PLATE
9011 1 CONNECTOR PIN
9012 4 BOLT
9013 4 NUT
9017 2 CIRCLIP
9018 1 HAIRPIN SPRING
9202 1 SADDLE PLATE
9203 1 LOCKING SPANNER
9204 2 SHAFT
9205 2 NUT
9206 4 BOLT
SPARE PARTS

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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]
RLO 90-100-120
7011
7028
9205
7023
7006
7007
7040
9206
9203
9010
7022 7043 9013 90119018 9012
9003
7010
7003
7004
9017
7044

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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]
PART NOQUANTITY SPECIFICATION
7003 1 STEADY LINK
7004 2 PIN
7006 2 YOKE
7007 4 PIN
7010 2 SPLIT BUSH
7011 4 SPLIT BUSH
7022 1 NUT
7023 1 NUT
7028 2 ROLL PIN
7040 1 CYLINDER
7043 1 SADDLE PLATE
7044 2 SHAFT
9003 4 SPLIT BUSH
9010 1 CONNECTOR PLATE
9011 1 CONNECTOR PIN
9012 4 BOLT
9013 4 NUT
9017 2 CIRCLIP
9018 1 HAIRPIN SPRING
9203 1 LOCKING SPANNER
9205 2 NUT
9206 4 BOLT
SPARE PARTS

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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]
7040 CYLINDER 7041 CYLINDER CASING 7042 COVER PLATE 9249 CYLINDER SEALS 9387 PISTON 9389 HEAD BUSH 9390 PISTON ROD
7042 7041 92499387
9390 9389
7040