6-4
Accessories operation guide
This section introduces the precautions that shall be observed for operating hydraulic excavators equipped with
accessories.
Note: Select the most suitable accessory for the main engine. The models of machines that can install
accessories are different. For the selection of accessories and machine models, please contact your
Yuchai dealer.
Hydraulic breaker hammer
1. Guidelines for the use of hydraulic breaker hammer
Hydraulic breaker hammer is the most common work accessory. It is widely used in the demolition of buildings, road
cracking, tunnel operations, steel slag and stones crushing, and crushing operations in quarries.
1) During crushing operations, please make sure that the
direction of the apex of the hammer drill rod is
perpendicular to the surface of the broken object, and
keep it as long as possible. If it is inclined to the surface of
the broken object, the drill rod may slip off the surface,
which may damage the drill rod and affect the piston.
During crushing, please select the appropriate hitting
point, and confirm that the drill rod is indeed stable before
hitting.
It is required to keep adjusting the bucket cylinder during
operation to keep the penetration direction of the drill rod
and the direction of the breaker hammer body in a straight
line.
2) During impacting, press the drill rod onto the impact
surface to make the chassis is about 5 cm off the ground,
and the machine shall not be away from the ground too
much.
3) During continuous impacting to the same impact
surface, if the drill rod cannot penetrate or break the
surface within 1 minute, change the impact position to
break it near the edge.
The direction of the apex of the hammer drill rod shall
be perpendicular to the surface of the broken object
Summary of Contents for U27
Page 1: ...U27Hydraulic Excavator Instruction Manual Guangxi Yuchai Heavy Industry Co Ltd...
Page 5: ...1 1 Preface...
Page 17: ...2 1 Safety regulations...
Page 44: ...3 1 Parts introduction...
Page 49: ...3 6 Panel meter Oil level pointer Timing display Water temperature pointer Indicator area...
Page 55: ...4 1 Operation guide...
Page 89: ...5 1 Maintenance...
Page 130: ...6 1 Accessories guide...