Hitachi Zaxis 850LC-3 Operator's Manual page 358

• Do not hit one place for longer than one minute.
If the hydraulic breaker is allowed to hit one place for a
long time, oil pressure may increase and accumulator
damage may result. If a material is too hard to be broken
in one minute, immediately change the hitting location.
Try to hit a breakable edge first to make the work more
efficient.
• Avoid blank strokes of the chisel.
After depressing a material with the hydraulic breaker
weight, start hitting. Blank strokes of the chisel may cause
overheating of oil and damage to the accumulator.
• Do not wedge the breaker chisel into material.
If the breaker chisel is used to wedge material, wear and
damage to the chisel and wear bushing may result.
• Hit perpendicularly to the material surface.
Unless the material surface is hit perpendicularly with the
chisel, the bolts and chisel may be broken.
OPTIONAL ATTACHMENTS AND DEVICES
If a material is too hard to be
b r o k e n i n o n e m i n u t e ,
immediately change the
hitting location.
Blank stroke
13-8
Break from an edge side.
WRONG RIGHT
WRONG
Do not wedge the
breaker chisel
Do perpendicularly to
the material surface
M116-05-011
M116-05-005
Depression
M116-05-006
M116-05-007
M116-05-008