Case CX490D Operator's Manual page 327

11. Press and hold the ON/OFF button (1) located on
the right-hand control lever to operate the hydraulic
breaker with the continuous selected flow providing
a constant blowing frequency. Release the button to
stop breaker operation.
NOTE: To change the blowing frequency, get back
to the dedicated tab for operational settings of the
auxiliary high-flow hydraulic circuit, and change the
flow rate/pressure combination to be used.
Avoid hitting objects with breaker. The breaker is heav-
ier than the bucket and lowers faster. This may cause
damages to the breaker, attachment, and upperstructure.
Always lower the breaker slowly until the chisel point
touches the object to be broken before starting breaker
operation.
Do not use the hydraulic breaker and/or swing function to
push objects as damages to the attachment may result.
Do not operate the breaker with the excavator cylinders
fully extended or retracted to avoid attachment and/or
cylinder damage.
9 - ACCESSORIES
9-21
20
SMIL15CEXZ396AB
21
NH0195
22
NH0196
23
NH0197