Hitachi ZAXIS 30U-5N Operator's Manual page 323

 When the arm rolled in with the crusher equipped, the
crusher may come in contact with the boom.
 When operating the crusher up high with the boom fully
raised, be careful of falling objects.
 When operating the crusher on a floor in a building, first
confirm that the floor has sufficient strength to support
the load caused by crushing, in addition to the machine
weight.
The load equivalent or higher than the machine weight
may be applied on floor depending on the operation
method.
OPTIONAL ATTACHMENT
ATTACHMENT (HYDRAULIC BREAKER)
13-11
Watch Out!
Take care not to hit the
boom with the crusher
MZX5-13-010
MZX5-13-011
MZX5-13-012