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© 2022 Dehaco B.V. • Operation and maintenance manual DSG Demolition and Sorting grabs • No. DSG.2165.0001 • 31-01-2022
Dehaco B.V. • Kruisbaak 25 • 2165 AJ Lisserbroek (NL) •
✆
+31 (0)252 - 41 79 50 •
[email protected] • www.dehaco.nl
5. Operation
Operation
5. OPERATION
WARNING!
- DISCHARGE OF HOT HYDRAULIC OIL
The hydraulic system is under high pressure. If the hydraulic
connections loosen, the hydraulic oil will spray out under
high pressure. This can lead to serious injury.
Ø
Switch the excavator and demolition and sorting grab off
immediately if a leak is detected.
Ø
Release the pressure in the hydraulic system.
Ø
Repair any leaks before using the demolition and sorting
grab again.
WARNING!
- HOT COMPONENTS
The hydraulic cylinder, hoses, tubes and fittings become very
hot during operation. Contact with these components can cause
burns.
Ø
Never touch hot components.
Ø
If works need to be completed on or near hot components,
wait for them to cool down first.
ATTENTION
- ENVIRONMENTAL CONTAMINATION BY HYDRAULIC OIL
Hydraulic oil is harmful to the environment. When hydraulic
oil is released (e.g. by leakage) the groundwater and soil may
become contaminated causing organisms to die.
Ø
Collect all spilled hydraulic oil to prevent environmental
contamination. For small amounts, use absorbent material.
Ensure it does not make its way into the soil, groundwater
or water lines.
Ø
Collect the contaminated absorbent material in an airtight
container and seal it well.
Ø
Contact a licensed waste disposal company.
Ø
Remove all contaminated materials in accordance with
current environmental regulations.
ATTENTION
- E
XCESSIVE HYDRAULIC OIL TEMPERATURE
The temperature of the hydraulic oil must not exceed 80 C.
Higher temperatures will damage the seals of the hydraulic
components.
Ø
Always monitor the oil temperature.
Ø
Turn the excavator and demolition and sorting grab off
when the monitor indicates an increased oil temperature.
Ø
Inspect the hydraulic system and the pressure relief valve.
5.1 Preparations for starting
WARNING!
- TIPPING THE EXCAVATOR OVER
An excavator that falls or tips over because it is placed on an
uneven surface can cause serious injury and property damage.
Ø
Always move the excavator with the greatest caution.
Ø
Do not use the demolition and sorting grab before the
excavator is stable.
WARNING!
- AIRBORNE FRAGMENTS
Fragments of materials that are released when using the
demolition and sorting grab can be thrown and cause serious
injury to people if struck. Even small objects falling from a great
height can cause serious damage.
The danger zone while using the demolition and sorting grab is
significantly larger than for excavation work.
Ø
Safeguard the danger zone.
Ø
Stop working with excavator soon as someone enters the
danger zone.
Ø
Close the windscreen and side windows of the excavator
cabin.
◊
Precautions for starting the demolition and sorting grab:
-
Ensure the demolition and sorting grab is complete.
-
Inspect the demolition and sorting grab and adapter
plate for cracks.
-
Ensure there are no leaks from the hydraulic lines.
The preparations required prior to starting the demolition and
sorting grab depend on the ambient temperature:
-
Ambient temperatures below 0 C (see Low ambient
temperature).
-
Ambient temperature higher than 30 C (see High
ambient temperature).
While working with the demolition and sorting grab, the oil
temperature must remain between 0 C and +80 C. The full
capacity of the demolition and sorting grab can be utilised at an
oil temperature of approxi60 C.
1) Ensure no persons are in the danger zone.
2) Start the excavator according to the instructions provided by
the excavator manufacturer.
3) Allow the excavator to warm up until the specified operating
temperature is reached.
4) Place the excavator in the desired position.
5.2 Switching the demolition
and sorting grab on and off
After attaching the demolition and sorting grab to the excavator,
the grab can be operated by the excavator’s hydraulic system. All
the functions for controlling the excavator remain unchanged.
The demolition and sorting grab is switched on and off by
electrical and hydraulic signals.
◊
Switch the demolition and sorting grab on and off according
to the specified operating instructions.
◊
Leaving the excavator cabin? Switch the safety switch for the
demolition and sorting grab to “off”.
Perform the actions described above to avoid unintentional
starting of the demolition and sorting grab.
5.3 Function test
Always perform a function test before using the demolition and
sorting grab. Ensure all hydraulic lines and connections are tight
and that the demolition and sorting grab operates smoothly.
◊
Prepare the demolition and sorting grab to allow proper use
(see Preparations for starting).
◊
Raise the demolition and sorting grab using the arm of the
excavator until it hangs vertically.
◊
Close and open the shells.
◊
Rotate the demolition and sorting grab to the left and right
using the
Rotate grab function.
◊
Verify the hydraulic lines of the demolition and sorting grab
work properly.
◊
Switch the demolition and sorting grab off immediately if
oil leaks from the hydraulic lines or other malfunctions are
identified.
◊
Relieve the pressure of the hydraulic system by releasing the
pressure in the hydraulic tank.
◊
Only use the demolition and sorting grab again after all leaks
and malfunctions have been corrected.
5.4 Proper use
5.4.1 Masonry demolition
Grasp the masonry with the shells of the demolition and sorting
grab and break the structure.
5.4.2 Sorting and loading
Use the shells for sorting and loading material.
5.4.3 Dust control
Keep the work area humid by continuously spraying water. This
reduces dust levels to a minimum. Dehaco B.V offers various
solutions for dust control in the form of misters and mist
sprayers. Visit www.dehaco.nl for more information.
