Hitachi ZAXIS 120-6 class Operator's Manual page 523

HYDRAULIC BREAKER, HYDRAULIC CRUSHER AND QUICK COUPLER
 When the arm is rolled in with the crusher equipped, the
crusher may come into contact with the boom.
 When operating the crusher with the boom fully raised,
be careful of falling objects.
 When operating the crusher on the 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.
Depending on the operation method, a load higher than
the machine weight may be applied to the floor.
OPTIONAL ATTACHMENTS AND DEVICES
Watch Out!
Take care not to hit
the boom with the
crusher
13-25
MZX5-13-010
MZX5-13-011
MZX5-13-012