DALBO FrontGrubber 300 User manual

FrontGrubber
Front-mounted grubber
EN
300/400/400H/600H cm

FrontGrubber
Type 300/400/400H/600H cm
Congratulations on the purchase of your new front grubber. For safety reasons and to
achieve optimum service from the product, please read the User Guide before use.
©Copyright 2002. All rights reserved, DAL-BO A/S
This product has:
Type no.: Serial no.:
Month of
manufacture: Net weight kg:
If contacting the manufacturer regarding spare parts or service, please state type and
serial number. A spare parts list is included at the back of this manual.
EU DECLARATION OF COMPLIANCE
DAL-BO A/S
DK-7183 Randbøl
declares herewith that the above machine is manufactured in accordance with the pro-
visions of directive 2006/42/EC, which replaced directive 98/37/EC and change direc-
tives 91/368/ECC, 93/44/ECC and 93/68/ECC on harmonisation of member state legis-
lation concerning health and safety requirements related to the construction and manu-
facture of machines.
This machine corresponds to the safety requirements in the European Safety Guide-
lines.
DAL-BO A/S Date:
Managing Director Kaj Pedersen
CE

Table of Contents
SAFETY..........................................................................................................................6
GENERAL ......................................................................................................................6
HYDRAULICS.................................................................................................................7
MOUNTING....................................................................................................................7
MAINTENANCE AND REPAIR ..........................................................................................7
ROAD TRANSPORT.........................................................................................................8
CORRECT USE................................................................................................................8
TECHNICAL DATA.....................................................................................................9
HOW TO USE THIS MANUAL ................................................................................10
USES..............................................................................................................................11
CONNECTING AND DISCONNECTING ...............................................................12
CONNECTING...............................................................................................................12
Lift arm angle.........................................................................................................12
HYDRAULICS...............................................................................................................12
DISCONNECTION .........................................................................................................13
SETTING UP................................................................................................................14
ADJUSTING DEPTH.......................................................................................................14
ADJUSTING CHAIN.......................................................................................................15
ADJUSTING SIDEBOARD...............................................................................................15
ADJUSTING PRESSURE OF HYDRAULIC STONE GUARD..................................................16
OPERATION ...............................................................................................................17
WORKING DEPTH.........................................................................................................17
OPERATING SPEED.......................................................................................................17
Power .....................................................................................................................17
TROUBLESHOOTING ..............................................................................................18
MAINTENANCE.........................................................................................................19
LUBRICATION..............................................................................................................19
HYDRAULICS...............................................................................................................20
REPLACEMENT ANDREPAIRS .............................................................................21
REPLACING STONE GUARD CYLINDER..........................................................................21
Replacing gaskets on stone guard cylinder............................................................22
Mounting ................................................................................................................22
REPLACING WEAR PARTS.............................................................................................23
SCRAPPING ................................................................................................................25
SPARE PARTS ............................................................................................................26

FrontGrubber
Side 6
Safety
This symbol appears in the instruction manual each time there is a safety
warning concerning your safety, the safety of others or functionality of the
machine. All safety instructions must be observed and made available to all
users of the machine.
General ·Ensure you are familiar with all aspects of the machine before use
·There are safety stickers on the machine containing important instructions
for the safety of yourself and others, and correct use of the machine.
·Do not carry passengers during operation or transport.
·Ensure there are no personnel within the machine's working radius before
operating. Operate machine only from inside the tractor.
·Before leaving the tractor or making adjustments, performing maintenance
or repairs on the grubber, fully lower to ground, or maintain in transport
position, apply tractor handbrake, switch engine off and remove ignition
key to secure the machine against accidental operation.
·Remember to secure the lift arm with a split pin.
·Never leave driver's seat whilst machine is moving.
·Always adapt speed to conditions.
·Do not use machine unless all safety devices are in place. Defective safety
devices must be replaced immediately.

FrontGrubber
Side 7
Hydraulics ·Ensure there are no personnel within the machine's working radius when
activating the hydraulic system to avoid danger of crushing.
·Lower machine fully for any repair work on the hydraulic system. Relieve
hydraulic pressure, switch engine off and remove ignition key.
·Clean hydraulic connections thoroughly before reconnecting. When con-
necting hydraulic hoses to tractor hydraulics, ensure they are not under
pressure.
·Bleed the hydraulic system thoroughly after any repairs.
·Check hydraulic hoses regularly for defects such as cracks, splits, crimps,
wear or breaks. Defective hoses must be replaced immediately.
·Avoid spilling oil on the ground. If oil is spilt, collect and deliver to a de-
struction point.
·Clean hands thoroughly after contact with oil and grease. Change oil-
stained clothing immediately. Hydraulic oil can be harmful to the skin.
·Hydraulic oil released under high pressure can penetrate the skin and
cause severe injury. In the event of injury, seek medical help immediately.
Mounting ·Danger of crushing! Ensure no personnel are between implement and
tractor, or between the parts to be connected.
Maintenance and repair
·Ensure machine is adequately supported for all repair and maintenance
work. Ensure tractor and machine are properly braked, engine stopped and
ignition key removed.
·Tighten all screw connections after a few hours use. Check all screw con-
nections regularly and tighten as required. Check all split pins and bolts to
avoid mechanical failure.
·Dispose of oil, grease and filters in accordance with local environmental
protection rules.

FrontGrubber
Side 8
Road transport ·All safety and warning precautions mandatory by law must be fitted and
tested before transporting the machine on public roads. The driver is re-
sponsible for correct lighting and warning signs in accordance with traffic
regulations.
·Check with local traffic authorities whether transport on public roads is al-
lowed given the machine's dimensions.
·When transporting machine, ensure tractor total weight and axle pressure
are not exceeded.
Correct use ·Correct use of the machine includes observing the manufacturer's operat-
ing, maintenance and repair instructions, and that original spare parts are
always used.
·The grubber may only be used, maintained or repaired by personnel famil-
iar with it and who are aware of the risks that can be involved.
·The manufacturer cannot be held liable for injury or damage arising from
modifications made to the machine performed without prior permission
from the manufacturer. Neither can the manufacturer be held liable for in-
jury or damage arising from incorrect use. Such liability rests solely with
the user.
·Do not add extra weight to the grubber.

FrontGrubber
Side 9
Technical data
Front Grubber
Size (cm) 300 400
HP (recommended) 80-100 100-125
Gross weight kg: 1350 1610
Wheels (2 pcs.) 10.0/75 x 15.3 10.0/75 x 15.3
Working width (m) 3 4
Number of teeth 9 13

FrontGrubber
Side 10
How to use this manual
The sequence of subject matter in this manual can seem illogical. Please refer
to the table of contents for page numbers for individual items.
The manual is divided into 4 main sections:
·Safety
·Operation (Settings, Running and Operation)
·Maintenance
·Repairs
The following symbols represent:
i
Points which are important to functionality and service life.
Points relevant to safety.

FrontGrubber
Side 11
Uses
The Front Grubber is a front-mounted universal implement which can
be used for a range of field tasks. In combination with e.g. a Maxi
Disc on the back of the tractor, two operations can be performed with
one pass. Ideal applications are on grass or where there are large quan-
tities of plant residue.
When sowing with various special sowing machines such as a rotary
harrow sowing set and towed disc cutting machines, the Front Grub-
ber is particularly effective at breaking up the soil before sowing, and
loosening a plough sole down to a depth of 30 cm.

FrontGrubber
Side 12
Connecting and disconnecting
Connecting Fig. 1
Fit lift arms first using lift pins
(A). Attach chain (supplied) to top
mount.
Remember to secure attachment using split pins and check lift arm hook lock
mechanism is engaged.
Lift arm angle
Ensure that tractor lift arms achieve an angle a couple of degrees over- or at
least horizontal when implement is lowered to the ground. This will enable
the implement to roll over obstructions as the tractor will force it up at an an-
gle and still retain control. Chain on top mount should be loose when imple-
ment is fully lowered.
Hydraulics A single-acting hydraulic outlet is required on front of tractor to adjust the
hydraulic stone guard system.
A

FrontGrubber
Side 13
Disconnection Lower FrontGrubber to ground before disconnecting. Disconnect hydraulic
hoses and lift arms. Disconnect light if relevant.
Remember to depressurise hoses before disconnecting them
.
Ball cock
must be closed before disconnection. Failure to do so will cause pressure
loss. Machine will drop to ground.

FrontGrubber
Side 14
Setting up
The FrontGrubber is supplied with factory settings, but fine adjustment will
always be required before use. Numerous adjustment options make the ma-
chine more flexible and ensure maximum use.
i
Basic setting will ensure the Front Grubber will run horizontally.
This basic
setting is important to achieve an even field surface and uniform work-
ing depth.
Adjusting depthSet depth using the drilled plates (A) on wheels and using tractor lift arms.
Both sections of frame must be horizontal. A driver-operated electronic depth
control mounted on the tractor is recommended. Contact Dalbo for details.
Fig. 2
A

FrontGrubber
Side 15
Adjusting chain
Fig. 3
Chain on top mount (A) should be
loose when implement is fully
lowered. This will ensure uniform
depth, control over the machine
and optimum weight equalisation
on tractor front wheels.
Adjusting sideboard
Fig. 4
To ensure an even surface at the
outside of the operating width, the
grubber is fitted with a sideboard
(A), which can be height-adjusted
using a spindle (B).
A
A
B

FrontGrubber
Side 16
Adjusting pressure of hydraulic stone guard
Hydraulic system pressure must be adjusted according to soil type. Very hard
soil will require much higher pressure than sandy soils.
A pressure of max. 120 bar is recommended for most conditions. 120 bar.
Remember to close ball cock on feeder hose when pressure has been adjusted.
Fig. 5

FrontGrubber
Side 17
Operation
Correct operation is vital for optimum use. This applies to working in the field
and for safety. Always ensure you are fully familiar with all safety aspects of
the machine.
Working depth The Front Grubber can be set for a very light effect. Depth can be controlled
very precisely by the wheels and tractor lift arms. As such, it can be set for
very light effect at a depth of only 5 cm approx. Working at this depth will
only lightly break up the soil. Never set depth at more than 30 cm. Exceeding
this setting can damage the machine.
Fig. 6
Ensure grubber works parallel to
ground when in operation.
Operating speedAn operating speed of 4-10 km/h is recommended, but always operate accord-
ing to conditions.
Increased speed will increase wear, particularly in dry conditions. The har-
rowing teeth can also be damaged if operating at excessive speeds in unfa-
vourable conditions.
Power
Power requirement will depend on soil type, terrain and speed.

FrontGrubber
Side 18
Troubleshooting
Fault Cause Remedy
Uneven working
depth
·
Wheels not set
evenly
·
Adjust wheels
·
Front Grubber
tips backwards
or forwards
·
Adjust lift arm height
·Adjust wheels
Difficult to control
·
Top mount chain
tight
·
Loosen chain
·
Working depth
too deep
·
Raise machine

FrontGrubber
Side 19
Maintenance
Good maintenance ensures long service life and optimum use. Grease nipples
are fitted where wear is heaviest.
i
Tighten all screw connections after first working day. Check all split pins
and bolts to avoid mechanical failure. Check hydraulic system for leaks.
Lubrication Fig. 7
A B C
D E F
Lubrication points Number
of nipples
Lubrication
intervals, hours
Illustration
Stone guard cylinder, upper 13/9 8 A
Stone guard cylinder, lower 13/9 8 B
Sideboard 6 50 C
Wheel bushing 2 8 D
Wheel bearings 4 50 E
i
Lubricate all lubrication points at least once annually.

FrontGrubber
Side 20
Hydraulics
Check all hydraulic hoses for wear or cracks. Check all hoses for crimping.
Replace defective hydraulic hoses immediately. Broken hoses can cause
injury or damage to the implement.
i
Lubricate exposed rams with oil or pressure-resistant grease to avoid rust
forming when storing for long periods. Remember to remove before use.