Operators Manual

OPERATION
General Information
Before operating, performing maintenance or repairing
the Challenger VL303 Needle/Chisel Scalers, this manual
must be read and understood. If in any doubt, ask your
supervisor before using this equipment.
Local safety regulations must be followed at all times.
Failure to follow these instructions could result in damage
to the Scaler and/or personal injury.
Operators should be familiar with the data given in the
specification section. Please keep these instructions in a
safe and accessible place.
Trelawny SPT Limited disclaims all responsibility for
damage to persons or objects arising as a consequence
of incorrect handling of the tool, failure to inspect the tool
for damage or other faults that may influence the
operation prior to starting work, or failure to follow the
safety regulations listed or applicable to the job site.
The tool is primarily designed for the removal of paint,
rust, scale, and for the removal of laitance from concrete,
it can be used both indoors and out.
This tool must not be used in a fixture.
Air Supply
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 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
(80p.s.i.) or rise above 6.9bar (100 psi) 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. (Spare balls are
supplied with the tool)
Safety
Always, read instructions first before use.
Do -
Be aware that this tool is not electrically insulated.
Be aware that the tool can create dust and flying debris.
Keep hands and clothing away from moving parts.
Be aware of others working around you.
Ensure that this tool is lubricated daily.
Store this tool in a secure and dry environment.
Wear Personal Protective Equipment including safety
goggles, footwear, ear defenders and gloves. In some
environments it will be necessary to wear facemasks or
breathing apparatus. (Vacuum shroud available)
Always observe safe-working practices at all times.
Do not -
Allow the tool to run unattended.
Use the Scaler as a lever.
Modify this tool in any way, this will invalidate the
warranty and could also lead to serious injury.
Use wire or any other fixing to lock the throttle lever in the
on/open position.
Operate tool with the front tube (34) removed.
Use the tool in potentially explosive environments.
Drag the tool by the air hose.
Use petrol (gasoline), thinners or any other high flash
point solvent to clean the tool.
Use the tool if you become tired, this can lead to physical
strain or injuries; where practical; use a spring balance,
balance weights or similar equipment to take the weight
of the tool.
Hold the exposed needles or chisel, whilst the tool is in
use, this could cause vibration damage to the hands.
Please note: Unrestrained hoses can whip if they
become detached.
Care must be taken to avoid damaging or tripping over
the trailing air hose.
Starting work
Please note,
The Carbon steel needles provided are not intended for
use in a potentially explosive atmosphere.
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.
Handled correctly the Challenger VL303 Needle Scaler
will work quickly and efficiently.