Clamshell bucket
Hydraulic equipment for clamshell
The hydraulic equipment for the clamshell enables
the connection and use of a clamshell.
WARNING
Risk of high pressure injection.
The hydraulic oil is under high pressure.
Discharging hydraulic oil will cause serious injury
when injected into the skin.
Depressurize the hydraulic system before
connecting or disconnecting hydraulic hoses.
For the procedure to release the pressure from the
hydraulic system see page
106
.
NOTICE
The safety regulations and operating instructions
issued by the manufacturer must be strictly
observed.
Connecting the clamshell
1 Place the machine on firm and level ground.
Position the machine as required for the
clamshell laying flat on the ground.
2 Slowly lower and align the boom, until the
fastening bores of the clamshell are flush with
the holes in the boom.
3 Release the pressure from the hydraulic system.
4 If the hammer / shear valve in front of the cooling
package (engine compartment) not is in the
correct position, turn it 90° clockwise to the
vertical position (A) to have the auxiliary line in
the double acting position.
5 Connect two hoses to connection B and E (to
open and close the clamshell).
6 Position C and D are used for the rotation
function of the clamshell.
7 Fully retract bucket cylinder.
8 Close the valve (A) (pressure line) by turning it
to the side in the horizontal position. When you
V1142525
B
A
Turn the hammer / shear valve in the
engine compartment 90° clockwise to
vertical position (A).
V1142527
B
C
A
Left side of the dipper arm
118
Operating techniques
Clamshell bucket