Hitachi ZAXIS 130-6N Operator's Manual page 480

HYDRAULIC BREAKER, HYDRAULIC CRUSHER AND QUICK COUPLER
Raising the Front Part of the Undercarriage by Pressing
Down the Breaker May Cause Damage to the Front
Attachment
Never raise the front edge of the undercarriage higher than
150 mm (6 in) by pressing the breaker down.
OPTIONAL ATTACHMENTS AND DEVICES
Pressing Raising
Down 100 to 150 mm
13-22
M147-05-016