Trelawny VL203Ex Operation And Maintenance Manual Download Page 7

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RISK OF HAND-ARM VIBRATION INJURY

air supply

STARTING WORK

These tools may cause Hand-arm Vibration Syndrome injury
if their use is not adequately managed. We advise you to
carry out a risk assessment and to implement measures
such as; limiting exposure time [i.e. actual trigger time, not
total time at work], job rotation, ensuring the tools are used
correctly, ensuring the tools are maintained according to
our recommendations, and ensuring that the operators wear
personal protective equipment [PPE] particularly gloves and
clothing to keep them warm. Employers should consider
setting up a programme of health surveillance to establish
a benchmark for each operator and to detect any early
symptoms of vibration injury.

We are not aware of any PPE that provides protection
against vibration injury by attenuating vibration emissions.

See ‘Specifications’ section for vibration emission data.

We strongly advise you to visit the Health & Safety
Executive website

http://www.hse.gov.uk/vibration

This site provides excellent advice and information on HAV
and currently, includes a Hand-arm Vibration Exposure
Calculator that is easy to use to work out the daily vibration
exposure for each of your operators.

The compressed air must be free from water and dirt.

The installation of a filter/regulator/lubricator air

preparation set (with moisture trap) adjacent to the tool
is strongly recommended.

In particularly cold temperatures it is recommended that a
proprietary anti-freeze lubricating oil is used. Always clear
the air hose before connection to the tool. Ensure that no
moisture (condensation) is present in the air hose. Ensure that
only 10mm (3/8”) bore antistatic air hose is used and that all
couplings are secure, leak free and in good condition.

For maximum efficiency, limit the length of air hose to 10M

(33ft). Where extra length is necessary, for each additional
15M (50ft) of air hose used, the pressure drop is approximately
0.16bar (3psi). The correct air pressure for this machine is to
6.2bar (90psi).

Do not let the operating pressure fall below 5.5bar (80psi) or
rise above 6.9bar (100psi) absolute maximum. The compressor
should be able to supply a minimum of 3.77 L/s (8cfm)
of free air not displaced as quoted by some compressor
manufactures, this will give 3cfm of headroom,
so that the compressor isn’t continually running.

NOTE: If this tool stops working, it is most likely that the plastic
(17) ball has worn excessively and may have passed into the
cylinder, check the cylinder exhaust holes for the remnant
also. This is designed to run for approximately 160hrs before
requiring replacement.

Please note we recommend using a lanyard or strap attached
to the optional Drop Protection fall arrestor (39). This should

be attached to a belt or harness, but preferably to a fixed and

secure mounting point.

Always use Trelawny Aluminium Bronze Chisels.

Prior to operating the tool check: -

That all fittings are secure, free from leaks and air hoses are in

good condition.

That the air pressure is correct for this tool 6.2 bar (90 p.s.i.).
Put a few drops of a recommended lubricant into the air inlet
of the tool.

Safe use of this tool requires a solid stance and secure
foothold, the tool may be used in other postures but care must

be taken that the operator adopts a firm and stable position.
Maintain contact with the work surface with sufficient pressure

only to keep the tool from bouncing.

Excessive pressure can prevent the tool from working to its full
capacity.