58
Operating Manual Crawler Excavator TC37
Working operation
6
6.2.2
Hydraulically actuated additional work
attachments
• Mechanical installation is similar to the attachment
of a bucket with or without quick-attach system.
• The hydraulic pressure supply is connected to the
lines of the additional control circuit (34/1) by
means of a coupling.
6.2.3
Clamshell grab (option)
Changing procedure using the quick-attach
system
• Attach the clamshell grab and close the quick-
attach system until the locking pins are completely
extended.
• Fully retract the bucket cylinder piston rod and
close the ball valve (34/3).
• Connect the swivel motor to the couplings (34/1
additional control circuit) and the "Open/Close"
function to the couplings (34/2 bucket cylinder).
Attention
• The ball valves and couplings are optional
and are not included in delivery.
Fig. 34
Additional control circuit
HR3.7-29
2
1
4
2
1
3
right
Attention
• The ball valves and couplings are optional
and are not included in delivery.
Machine damage
due to the bucket cylinder piston rod not
having fully retracted.
• Ensure that the bucket cylinder piston rod
is fully retracted.
Attention
• After the clamshell grab has been
removed, re-open the ball valve
.
left
