Hyundai HL930A Operator's Manual page 253

39) 39) WORK EQUIPMENT SUPPORT WORK EQUIPMENT SUPPORT
When carrying out inspection and maintenance
with the equipment raised, fit a stand under the lift
arm securely to prevent the work equipment from
coming down. In addition, set the work equipment
control levers to the Hold position and put the
pilot cut off switch to the OFF position.
40) BOOM SAFETY LOCK BAR (option) 40) BOOM SAFETY LOCK BAR (option)
(1) (1) Supporting upporting
If it is necessary to carry out any maintenance If it is necessary to carry out any maintenance
operation or to stop the machine with raised operation or to stop the machine with raised
boom, always use the boom safety lock bar boom, always use the boom safety lock bar
and put the pilot cut off switch to the OFF posi- and put the pilot cut off switch to the OFF posi-
tion. tion.
※
The attachment should be empty. The attachment should be empty.
①
Raise the boom fully.
②
Stop the engine and remove the starter key.
③
Loosen the two wing bolts and remove safety
lock bar from its stowage position.
④
Place the safety lock bar onto the boom cylinder
and secure the safety lock bar by tyng the string
shown as figure.
⑤
Slowly lower the boom to fix the safety lock bar.
※
When lowering the boom, operate the control
lever very slowly.
(2) (2) Lowering owering
①
Raise the boom to take the weight off the
safety lock bar.
②
Stop the engine and remove the starter key.
③
Loosen the string and remove the safety lock
bar carefully.
④
Reinstall the safety lock bar onto its stowage
position using the wing bolts.
Stowage position
String
Supporting position
6-53
740F6MI48
Boom safety lock bar
Wing bolt
9356MI62