Komatsu WA470-6 2006, Operation & Maintenance Manual

Page: 66 / 392

2.4 Precautions for maintenance Safety
2-38
WA470-6H – VEAM946100
Personnel
Only authorized personnel can service and repair the machine.
Do not allow unauthorized personnel into the area. If necessary,
employ an observer.
Attachments
!
Appoint a leader before starting removal or installation oper-
ations for attachments.
!
Place attachments that have been removed from the
machine in a stable condition so that they do not fall. And
take steps to prevent unauthorized persons from entering
the storage area.
Working under the raised boom
WARNING
Danger of injury! The raised boom may suddenly fall! For safety
reasons, a raised boom must be secured against dropping
before you pass or stand under it.
!
The boom must be secured against moving if any work is to
be carried out under it when it is in a raised position. For this
purpose you should use a supporting prop (1) which is to be
positioned below the boom.
!
Park the machine on level, solid ground.
!
Apply the parking brake.
!
Place wheel chocks in front of the wheels to prevent the
machine from inadvertently rolling away.
!
Lift the arm far enough to allow the supporting prop to be
placed beneath the boom.
!
Switch off the engine.
!
With the engine switched off, lower the boom slowly until it
rests on the supporting prop.
!
Set the control lever to "NEUTRAL" and secure it with the
work equipment lock lever (2) (locked).
GK032079
GK032080
1
GK038007
2
Free
Lock