Hyundai HL930A Operation & Maintenance Manual page 247

43) BOOM SAFETY LOCK BAR (option)
(1) Supporting
If it is necessary to carry out any main-
tenance operation or to stop the ma-
chine with raised boom, always use the
boom safety lock bar and put the pilot
cut off switch to the OFF position.
The attachment should be empty.
Raise the boom fully.
Stop the engine and remove the starter
key.
Loosen the two wing bolts and remove
safety lock bar from its stowage position.
Place the safety lock bar onto the boom
cylinder and secure the safety lock bar by
tying the string shown as figure.
Slowly lower the boom to fix the safety
lock bar.
When lowering the boom, operate the
control lever very slowly.
(2) Lowering
Raise the boom to take the weight off the
safety lock bar.
Stop the engine and remove the starter
key.
Loosen the string and remove the safety
lock bar carefully.
Reinstall the safety lock bar onto its stow-
age position using the wing bolts.
String
Supporting position
6-53
Boom safety lock bar
Wing bolt
Stowage position