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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
4. Installation
4.2.1 Making the hydraulic connections
ATTENTION
- INCORRECT HYDRAULIC SYSTEM
The excavator must have a suitable hydraulic system to operate
the demolition and sorting grab. Improperly installed piping
and incorrectly calculated dimensions may lead to excessive oil
temperatures anD damage to the demolition and sorting grab.
Ø
Only use lines with the dimensions specified in the chapter
Technical Specifications.
Ø
Verify the specified dimensions of the hydraulic lines on
existing hydraulic systems. All supply and return lines for
the hydraulic oil must have a sufficient internal diameter
and wall thickness
Ø
Ensure the hydraulic hoses cannot be pinched.
◊
Switch the excavator off.
◊
Relieve the pressure of the hydraulic system by releasing the
pressure in the hydraulic tank.
◊
Close all valves if quick connects are not used.
ATTENTION
- DAMAGE TO HYDRAULIC COMPONENTS
Sand and dirt can enter the hydraulic lines and cause damage.
Clean all hydraulic lines and connections before
connecting the hydraulic hoses.
◊
Contaminated hydraulic pipes must be cleaned by a
specialist company.
◊
Clean contaminated hydraulic pipe connections with a
suitable universal degreaser/cleanser.
◊
Refer to information from the cleaning agent manufacturer
regarding safety and use.
4.2.2 Connecting the hydraulic hoses for the
Open
and
Close
functions
◊
Remove the caps/blank flanges from ports
A and B and store
in a safe place.
◊
Inspect for damage.
◊
Replace any damaged connections.
◊
If the two input lines from the excavator arm have the same
working pressure, connect the lines to the
Open and Close
ports being careful not to cause pinching (see figure page 10).
◊
If the pressure in the two input lines differ, connect the hose
with the higher operating pressure to the
Close port and the
hose with the lower pressure to the
Open port being careful
not to pinch the hoses.
4.2.3 Connecting the hydraulic hoses for the
Rotate
function
◊
◊ Remove the cap nuts and plugs from the connections for
the
Rotate function and store them for future use.
◊
Inspect the connections for damage.
◊
Replace damaged connections.
◊
Attach the hoses to the connector for the Rotate function.
◊
Connect both hoses for the
Rotate function to the arm
carefully to prevent pinching.
WARNING!
- THRASHING HYDRAULIC HOSES
Hydraulic hoses under pressure will thrash about if a bolt
connection becomes loose or detached. This can cause serious
injury.
Ø
Tighten the mounting screws to the correct torque.
4.3 Detaching the demolition and
sorting grab from the excavator
WARNING!
- UNEXPECTED MOVEMENTS
Sudden movements by the excavator can cause injury.
Ø
Secure the excavator to prevent unexpected movement.
Ø
Follow the instructions from the excavator manufacturer.
WARNING!
- THRASHING HYDRAULIC HOSES
Hydraulic hoses under pressure will thrash about if a bolt
connection becomes loose or detached. This can cause serious
injury.
Ø
Relieve the pressure in the hydraulic system before
disconnecting the hydraulic hose.
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.
◊
Close all shut-off valves in the excavator arm system if quick
connects are not used.
◊
Disconnect the hoses to and from the demolition and sorting
grab on the side of the excavator arm.
◊
Seal all open hose ends.
4.3.1 Mechanical detachment
Note: If a pin and bushing system, follow the procedure outlined
below. If another (quick change) system is being used, we
recommend consulting the manufacturer’s manual.
◊
Request help from a colleague when detaching the
demolition and sorting grab.
◊
Agree on clear hand signals for moving the excavator arm.
WARNING!
- INJURIES CAUSED BY THE EXCAVATOR ARM OR DEMOLITION AND
SORTING GRAB
Sudden movements by the excavator can cause the excavator or
the demolition and sorting grab to strike your colleague.
Ø
Move the excavator arm very slow and in a controlled
manner when a colleague is in the danger zone.
Ø
Ensure your colleague always remains visible.
4. Installation
WARNING!
- METAL SPLINTERS
Hammering bolts out can cause splinters to fly off
which can cause serious damage to the eyes.
Ø
Wear safety goggles when hammering out bolts.
◊
Remove the bolt clips from the shank.
◊
Remove the connecting bolt with a steel pin and a hammer.
◊
Switch the excavator on.
◊
Retract the bucket cylinder.
◊
Remove the hinge pin with a steel pin and a hammer.
◊
Remove the excavator arm from the adapter plate.
4.4 Detaching the adapter plate
◊
Loosen the fastening screws for the adapter plate.
◊
Lift the adapter plate using suitable lifting equipment and
place it on wooden support blocks.
◊
Store the mounting screws and washers for future use.
