Hitachi ZAXIS 120-6 class Operator's Manual page 526

Hydraulic excavator
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HYDRAULIC BREAKER, HYDRAULIC CRUSHER AND QUICK COUPLER
 Breaker operation speed is faster than crusher operation,
so the recommended maximum weight for breakers are
lower than those for crushers.
 Weight is not the only factor to be considered when
selecting a breaker. Select manufacturer's breaker models
referring to the table on the next page.
 Avoid installing an attachment with a long overall length.
Damage to the front attachment may result.
 When an attachment of the maximum weight is installed,
always operate the attachment over the front or rear
side of the machine. Avoid operating the attachment at
maximum reach.
 Crushers are heavier than breakers. Slowly move the
control lever when operating a crusher.
 Always contact your authorized dealer before installing
attachments of other manufacturers.
OPTIONAL ATTACHMENTS AND DEVICES
13-28

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