6-5
4) Make sure that the drill rod always impact the surface
properly to prevent the impact force from being used if
there is no resistance.
If the rock or the target has been crushed, stop the action
of the breaker hammer immediately. The continuous
aimless impacting will cause the front part and the main
bolts to loosen and damage, and even damage the
excavator itself.
Aimless impacting comes from improper insertion and
shaking during use of the breaking hammer.
2. Operation taboos for hydraulic breaker hammer
In order to ensure longer service life and safe operation, do not operate the machine in any of the following:
Note: Do not operate all cylinders to the end of the cylinder stroke, and always leave a margin of about
5 cm.
1) Push heavy objects or large rocks with the breaker
hammer.
2) Operate with turning force.
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...