Choosing The Correct Hydraulic Breaker For A Task; Installation; Hoses; Quick-Release Couplings - Atlas Copco LH 11 Instrucciones De Seguridad Y De Funcionamiento

Safety and operating instructions
Choosing the correct
hydraulic breaker for a task
It is important to choose the correct size of
hydraulic breaker for the work to be performed.
A hydraulic breaker that is too small means that the
work will take longer.
A breaker that is too big means that there must be
frequent repositioning, which is unnecessarily tiring
for the operator.
A simple rule for choosing the correct size of
hydraulic breaker is that a normal sized piece
of broken material should be removed from the
workpiece within 10–20 seconds of operation.
► If it takes less than 10 seconds a smaller
hydraulic breaker should be selected.
► If it takes more than 20 seconds a larger
hydraulic breaker should be selected.

Installation

Hoses

For connection of the breaker, the hydraulic hose
must be approved for a working pressure of at
least 200 bar (2900 psi) and have a ½" inner
diameter. To resist exterior wear and tear, we
recommend using a 2-layer hydraulic hose. The
breaker connection marked P (pump) is oil inlet,
and the connection marked T (tank) is oil outlet.

Quick-release couplings

The original Atlas Copco hydraulic hoses are
fitted with Flat-Face quick-release couplings that
are strong and easy to clean. The quick-release
couplings are fitted so that the male connection
supplies oil and the female connection receives oil.
Fitting and removing the
working tool
Whenever fitting/removing the working tool the
following instructions must be observed:
1. To prevent an accidental start, switch off the
oil supply. Bleed the machine by pressing the
start/stop device. Disconnect the machine
from the power source.
2. Remove a tool by swinging the latch (C) fully
down (Illustration A).
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LH 11, 18, 19 E, 22, 23 E, 27, 28 E, 39, 40 E
3. Fit a tool by ensuring that the latch (C) is
fully down. Then insert the tool in the breaker
as shown and swing the latch (C) fully up
(Illustration B).
Illustration A Illustration B
C

Actions before starting

The following checks should be made each time
you start to use the breaker. All these checks
concern the serviceability of the breaker. Some
concern your safety:
► Clean all safety stickers. Replace any that are
missing or cannot be read.
► Inspect the hoses generally for signs of damage.
► Inspect the working tool for wear and damage.
Do not use an excessively worn or damaged
tool.
► Connect the tool.
► Ensure that the hydraulic couplings are clean
and fully serviceable.
► Do not invert the breaker without first isolating it
from the power source. The working tool might
be fired out while connecting it, if the breaker is
connected to the power source.
► Ensure that any power source you plan to use
is compatible with the breaker model used (see
the "Technical data"). Atlas Copco recommends
using an LFD oil flow divider, if the flow from the
power source can exceed the maximum allowed
oil flow.
C
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No. 3392 5010 83 f 2007-03-06