Komatsu PC450-8 Operation & Maintenance Manual page 448

DEMOLITION DIGGING BOOM INSTALLATION AND REMOVAL
Before reconnecting each hose ensure no foreign matter is
in the hydraulic lines and that all connections are clean.
14. Connect the individual quick connector lines, in accordance
with the diagram and table.
15. Connect the banked quick connectors.
A - Connected; B - Disconnected
16. Set the Equipment change over switch in the operator cab to
"standard equipment". This ensures that the arm cylinder
operates correctly.
.
POSITION
A (LEFT LOWER) Att. Rotate
B (LEFT UPPER) Att. Drain
1 (TOP) Mid Link cyl bottom Not used
2 (TOP) Arm cyl top
3 (TOP) Bucket cyl bottom
4 (TOP) Att. Crush
5 (TOP) Att. Crush
6 (TOP) Bucket cyl top
7 (TOP) Arm cyl bottom
8 (TOP) Mid Link cyl top
C (RIGHT SIDE) Att. Rotate
D LINK Safety valve
E Arm safety valve
F Safety valve drain
Take care to reconnect the hydraulic lines in the correct
order. Improper operation of the machine will occur if hoses
are connected incorrectly.
17. Reconnect the grease lines.
18. If the digging arm is not fitted, carry out the steps in CON-
NECTING DIGGING ARM TO DEMOLITION DIGGING
BOOM (7-39). If the digging arm is fitted, purge the hydraulic
circuits of air by following the steps in PURGING AIR PRO-
CEDURES (7-41).
7-38
CAUTION
HIGH REACH DEMOLITION DIG
FUNCTION FUNCTION
Att. Rotate
Att. Drain
Arm cyl top
Bucket cyl bottom
Att. Crush
Att. Crush
Bucket cyl top
Arm cyl bottom
not used
Att. Rotate
Opt (safety valve)
Opt (arm safety valve)
Opt
WARNING
HIGH REACH DEMOLITION EQUIP-
DEMOLITION DIG BOOM/
DEMOLITION BOOM 2
HOSES
DEMOLITION BOOM 1