HSS Hire 452 Operator's manual

High Speed
Grinder
A petrol powered grinding machine
for levelling high spots, grinding
cured slabs or removing difficult
floor coating.
Operating & Safety Guide 452
Always position yourself so you can control the
Floor Grinder while staying clear of the grinding
head.
When you are wet grinding, turn the water supply
on at the tap and open the water inlet valve on
the machine. Only use enough water to reduce dust.
Excess water can create a hazardous working area and
will cause clean up problems.
When you are dry grinding switch on the dust
extraction system.
Keeping one hand on the control handle, tilt the
machine back, enough to raise the disc off of the floor and
start the engine. Set the throttle to the desired speed.
Gently lower the machine to the floor. On first
contact with the surface the machine may jolt, use
extra care until you are familiar with this characteristic.
When grinding, work in straight, overlapping
strips until the entire area has been covered. Do
not pause in one spot or you will damage the floor.
Take your time and don’t over do it. You are more
likely to have an accident if you are tired or rushing.
When you have finished, tilt the machine back to
raise the disc from the floor and switch the engine off
by moving the ON/OFF switch to the OFF
position.
When all moving parts have come to a rest lower
the machine back to the floor.
When you are wet grinding, close the water inlet
valve on the machine and turn the water supply off
at the tap.
When you are dry grinding, turn the dust
extraction unit off.
Before moving on to the next work location tilt
the grinder forwards until the wheels are clear of
the ground and swing the wheels forward, into
the transport position. It can now be wheeled to the
new location.EQUIPMENT CARE
BASIC TECHNIQUES Never push the equipment beyond its design
limits. If it will not do what you want with reasonable
ease and speed, assume you have the wrong tool for the
job. Contact your local HSS Hire Shop for advice.
Replace the disc as soon as it becomes worn. Use
only discs supplied by HSS, any others could damage the
machine and your floor.
Keep the equipment clean - you will find this less of a
chore if you clean it regularly, rather than wait until the
end of the hire period.
When not in use, store the equipment somewhere
clean, dry and safe from thieves.
Set the engines ON/OFF switch to OFF and close
the fuel tap.
If you are dry grinding detach the extraction hose
from the machine and coil it away.
If you are wet grinding detach the water hose
from the machine and coil it away.
Remove any inserts fitted to the grinding head
and give the machine a final clean up ready for
return, to your local HSS Hire Shop.
FINISHING OFF
Code 06566 / 9
©HSS Hire Service Group Plc 2001 No. 452/01
Group Office: 25 Willow Lane, Mitcham, Surrey CR4 4TS
Web Site: http://www.hss.com
Contact your local
0845 728 2828
…any comments?
If you have any suggestions to enable us to improve
the information within this guide please fax your
comments or write to the Product Manager at the
address below
Fax: [phone]
452/01
Disc
Replacement
With the engine turned
OFF, tilt the machine back
to allow access to the disc.
Do not tilt too far or petrol
and oil may spill.
Undo the 4 disc mounting screws and remove
to worn disc downwards. Fit the new disc
and replace the mounting screws.
Retaining
Screw Holes

For advice on the safety and suitability of this equipment
contact your local HSS Hire Shop.
There is a serious risk of personal injury if you do
not follow all instructions laid down in this guide.
The hirer has a responsibility to ensure that all
necessary risk assessments have been completed
prior to the use of this equipment.
This equipment should only be used by an operator
who has been deemed competent to do so by
his/her employer.
This equipment should be used by an able bodied,
competent adult who has read and understood these
instructions. Anyone with either a temporary or permanent
disability, should seek expert advice before using it.
Keep children, animals and bystanders away from
the work area. Cordon off a NO GO area using
cones and either barriers or tape, available for hire
from your local HSS Hire Shop.
Never use this equipment if you are ill,
feeling tired, or under the influence of
alcohol or drugs.
Safety goggles MUST be worn by everyone in
the work area.
This equipment generates potentially harmful
noise levels. To comply with health and safety at
work regulations, ear defenders must be worn by
everyone in the vicinity.
Some materials, when ground, contain
substances which, when inhaled, can be
harmful to health. A suitable mask must be worn
when using this equipment. Respiratory protective
equipment is available for hire, contact your local HSS
Hire Shop for details.
Wear practical, protective clothing, gloves and
footwear. Avoid loose garments and jewellery that
could catch in moving parts, tie back long hair.
This equipment is heavy (86Kg), never attempt
to lift it on your own, always get help.
Always switch the engine off and wait for moving
parts to come to rest before making adjustments to it.
Having switched OFF, always wait for the grinding
head to come to rest.
Ensure the work area is well lit and ventilated, if in
doubt, ask about lighting and ventilation equipment at
your local HSS Hire Shop.
Do not work near flammable gases or liquids, petrol
or paint thinner fumes for example. Keep combustible
materials at a safe distance - at least 5m.
Make sure you know how to switch this machine
OFF before you switch it ON in case you get into
difficulty.
GENERAL SAFETY
Engines, especially the exhausts, get very hot so
switch OFF and allow to cool before touching them.
Keep flammable materials well away from engine
and exhaust.
Make sure that anyone in the immediate work area
is warned of what you are doing.
Check the condition of the equipment before use.
If it shows signs of damage or excessive wear, return it to
your local HSS Hire Shop.
It is essential to familiarise yourself with all the
controls before starting.
Move the wheels from the transport position to the
grinding position by tilting the machine forward
until the wheels are off the floor and then swinging the
wheels back towards the rear of the grinder.
Gently lower the machine back onto its wheels
and check that it is level. If the grinder is not level,
or the wheels are left in the transport position,
attempting to use it will damage your floor.
Tilt the unit back and check the disc for condition,
replace if worn (see disc replacement in EQUIPMENT
CARE).
With the machine on firm level ground, check fuel
and oil levels (see EQUIPMENT CARE).
Set the engines ON/OFF switch to ON, open the
fuel tap and set the choke –fully closed if starting
from cold, half closed if the engine is warm.
Tilt the machine back to raise the disc off the floor.
With the throttle control set to half way, two or
three brisk pulls on the starter cord should now
start the engine.
Once the engine has warmed up, fully open the
choke, and reset the throttle to idling speed.
GETTING STARTED
Fuel Safety
NEVER refuel while the engine is hot or running.
Never smoke or allow naked lights into the area
while refuelling.
Never inhale fuel vapour.
ALWAYS mop up any spillage as quickly as
possible, and change your clothes if you get
fuel on yourself.
ALWAYS store fuel in a purpose-made sealed
container, in a cool, safe place well away from
the work area.
Exhaust Danger
NEVER operate petrol engines indoors or in a
confined space.
The exhaust contains gases that can kill.
You MUST use either water suppresion or dust
extraction to comply with health and safety
regulations.
For wet grinding attach a water hose to the water
inlet at the rear of the machine. Do not allow water
to flow until you are ready to start work.
Water supply hoses and suitable wet pick up vacuum
cleaners are available for hire from your local HSS Hire
Shop.
For dry grinding attach a dust extraction unit to
the dust extraction port at the rear of the machine.
Dust extraction units are available for hire from your local
HSS Hire Shop.
ON/OFF
Switch
Throttle
Dip
Stick
Pull
Cord
Control
Handle
Fuel
Tank
Water
Inlet
Dust
Extraction
Port
ON
OFF
Closed
Open
Transport
Position
Grinding
Position
High Speed Grinder