Operation and maintenance manual

DX140R/DX140LCROperation

3-34

Breaker Operating Precautions

NOTE: Hydrau

lic pressure and flow settings may need to be

changed. Refer to the Maintenance Section of this

manual for further information.

1. Make sure to read and understand the breaker user's

manual.

Inspect all mechanical and hydraulic connections.

3. Do not use the breaker as a hammer. See Figure 76.

Do not drop breaker from extreme heights.

The breaker is relatively heavy and drops fast. Do not drop

breaker

from extreme heights or damage to upper

structure can result.

4. Do not operate the breaker with the boom or arm cylinders

fully extended (bottomed out). See Figure 77.

Leave over 100 mm (4 in) of clearance between rod end of

linder and cylinder head. This will help prevent damage

to cylinders during breaker operation.

5. Do not use the breaker if the hydraulic hoses vibrate

excessively. See Figure 78. Check the breaker's hydraulic

accumulator (1) for damage and repair as required. If

excavator

is operated under this condition, structural and

hydraulic components can be damaged.

FG000188

Figure 76

FG000191

Figure 77

FG000215

Figure 78