OPERATION
General Information
Thank you for your purchase of the Multi-
headed Scabbler.
Before operating the Multi-headed Scabbler,
this manual must be read and understood by
the operator, if in any doubt ask your
supervisor before using this equipment.
Failure to follow these instructions could result
in damage to the Scaler and/or personal
injury.
Trelawny SPT Ltd disclaims all responsibility
for damage to persons or objects arising as a
consequence of incorrect handling of the tool,
failure to inspect the tool prior to starting work
for damage or other faults that may influence
the operation or safe working of the tool, or
failure to follow the safety regulations or
applicable to the job site.
The tool is primarily designed for concrete
reduction, and the removal of laitance from
concrete floors, but may also be used for the
removal of paint or epoxy floor coatings, it can
be used both indoors and out.
This machine must not be used in a fixture.
Note:
Bush Hammer style headed pistons are best
suited to concrete reduction and for laitance
removal; these may reduce the likelihood of
damage to the aggregate, ensuring that a
stronger bond is created with the next fill or
finish layer.
Cruciform headed pistons are suited to the
reduction of concrete or where a smoother
finish is required, these will reduce the
aggregate as well as the concrete surface
leaving a relatively flat surface, these are also
suitable for the removal of paint and epoxy
coatings.
Operators should be familiar with the data
given in the specification section.
Please keep these instructions in a safe and
accessible place.
This tool must not be used in potentially
explosive atmospheres.
Where a vacuum shroud assembly is supplied
separately, see the instructions under
“Servicing” for fitting.
Manual Handling
The complete tool weighs approximately 70kg
(155lbs).
Where possible use a hoist with correctly
rated lifting equipment to connect to the
supplied lifting eyebolt fitted on the top of the
MHS11 Scabbler.
Ensure that the eyebolt is screwed down to its
shoulder and has been tightened using a bar
no longer than 150mm (6.00”).
Always ensure the handle is locked and
secure during any handling operation.
Always apply local health and safety
regulations with regard to manual handling.
Safety Precautions
Do
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.
Do
be aware that this tool is not electrically
insulated.
Do
ensure that this tool
is
lubricated
daily
.
Do
be aware that this tool can create dust and
flying debris.
Do
be aware of others working around you.
Do
keep hands and clothing away from
moving parts.
Do
store this tool in a secure and dry
environment.
Always observe safe working practices
and local safety regulations at all times.
Do not
allow the tool to run unattended.
Do not
allow the tool to run continuously
whilst not in contact with the surface being
prepared.
Do not
modify this tool in any way, as this will
invalidate the warranty and could lead to
serious injury.
Do not
use this tool in potentially explosive
environments.
Do not
drag this tool by the air hose.
Do not
use petrol (gasoline), thinners or any
other high flash point solvent to clean the tool.
Please note
: Unrestrained hoses can whip if
they become detached.
Ensure that the work place is well ventilated.
Avoid operating engine-powered compressors
in an enclosed area, since engine exhaust
gases are poisonous.
Recommended
lubricants
Oil the tool daily before use. Put a liberal
quantity of one of the following air tool
lubricants through the air inlet.
SHELL
Naturelle HF
CASTROL
Carelube HTG 22
Cleaning
At intervals of no more than 100 hours use, or
if operation becomes unproductive, or if any of
the pistons shows signs of sticking, dismantle
and clean with highly refined paraffin. Replace
any worn components as necessary.
Immediately after cleaning, thoroughly oil the
tool with one of the recommended lubricants.
Risk of Hand-arm
Vibration injury
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 and dry.
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.
Further advice is available from our Technical
Department.
Pre-Start Check
The compressed air supply must be free from
water and dirt. The installation of a filter/
regulator/lubricator air preparation set (with
moisture trap) adjacent o the tool is
strongly
recommended.
Always clear the air hose
before connection to the tool. Ensure that no
moisture (condensation) is present in the air
hose. Ensure that a minimum 19mm (3/4”)
bore air hose is used and that all couplings
are secure; leak free and in good condition.
Limit the length of air hose to 15M (50ft).
Where extra length is necessary, for each
additional 15M (50ft) of air hose used, the
pressure drop is approximately 0.16bar
(3psi).
Correct operating pressure is 6.2bar (90
psi).
Do not let the operating pressure fall below
5.5bar (80p.s.i.) or rise above 6.9bar (100 psi)
absolute maximum.
Preferably, the compressor should be able to
supply a minimum of 33L/s (70cfm) free air. In
particularly cold weather it is recommended
that a proprietary anti-freeze lubricating oil be
used.
Starting Work
Prior to operating the tool check: -
That all fittings are secure, free from leaks
and air hoses are in good condition.
That all parts of the tool are fully screwed
together and secure, if in any doubt ask
your supervisor before using this
equipment.
That a liberal amount of lubricant has been
put into the air inlet of the tool. (See
recommended lubricants)
Safe use of this tool requires a solid stance
and secure foothold; the operator must adopt
a firm and stable position at all times. Depress
the foot mechanism (24) to release the
handle. Never run the tool with the handle
fastened to the main body. To operate the tool
turn the ball valve on the handle to the fully
opened position and immediately start to
move the tool back and forth, continue until
the desired finish is achieved. Never run the
tool continuously in the same place, as the
cutterheads will dig into the surface. If the tool
is new, optimum performance will be achieved
after 15mins “running in” of the brush seals
(48).
To switch off
, simply return the ball
valve lever to 90° to the handle whilst
continuing to move the tool back and forth,
return handle to the upright position, ensuring
foot release has engaged. Complete a small
area noting the performance; stop the
machine, inspect the finish produced. Handled
correctly the MHS11 Multi-headed Scabbler
will work quickly and efficiently.
Gloves and personal protective equipment
must
be worn when using this tool. The tool
will ride irregularities of up to 13mm (1/2”).
Anything greater will risk cutterhead damage.
Care must be taken to avoid damaging or
tripping over the air hose.
Servicing
Only a competent person, in a suitably
equipped workshop, must carry out
maintenance.
Disconnect the tool from the air supply
before carrying out any of the following
operations.
Dismantling
After ensuring that the air supply is turned off,
remove the tool from the airline. Thoroughly
clean the outside of the tool prior to
dismantling.
Cutter Head Removal (Two Piece)
To change the replaceable cutter heads
without completely dismantling the tool.
