Allied AR110C, Safety, Operation And Maintenance, Page: 23 / 60

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SOM576701_14jan
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6.0 Operation – [cont’d]
A metallic pinging sound is emitted when the tool
strikes against the retainer pins. Never operate the
breaker when the tool suspended in the air (Blank
Fire), or is not pressed firmly against the material
(Idle Strokes). Both conditions are damaging to the
breaker. The tool must always remain firmly in
contact with the material.
Use the carrier to follow the progress of the breaker
as the tool penetrates into the material. With material
that is weak and easily fractured, the operator must
react quickly and stop the breaker to prevent idle
strokes.
Fig 6-6 Misalignment – Side Load against Bushing
The breaker will emit a hollow (thin) sound when the
tool is binding in the bushing. This is usually
accompanied by a drop in blow frequency and
reduced impact energy.
Binding can be the result of misalignment or
insufficient lubrication. Review operator technique.
Tool binding can be avoided by working at a 90

angle to the material. Make sure the tool and
bushings are kept well lubricated. Re-lubricate the
tool every two hours or if it appears dry.
6.3.2 Do Not Pry With the Breaker
Fig 6-7 Do Not Pry With the Breaker
Bending results from prying or misalignment and is
the leading cause of tool breakage. Prying exerts an
enormous strain over the entire Breaker, including
the breaker tool, bushings and housing. In the
occurrence of tool failures from bending, the length of
the tool, skill level of the operator and lubrication
management, all play a decisive role.
NOTE:
Impact force is absorbed if the ground
underneath the material is not solid. Impact force is
also absorbed by the accumulation of rock dust. Tilt
the breaker with the bucket control to expel dust but
use care to avoid bending strain on tool and front
head. Tilt no more than 5º.
6.3.3 Do Not Drop or Hack at Material
Avoid reckless movements that can damage the
breaker or cause the carrier to become unstable. Do
not drop the breaker against the material. Do not use
the breaker to hack at the material.
Fig 6-8 Do Not Drop, Pound or Hack the Material.
6.3.4 Do Not Lift or Transport Loads with Breaker
Figure 6-9 Do Not Use the Breaker to Lift or
Transport Loads
NO!
NO!
NO!