HSS Hire 765 Operating & Safety Manual
765/01 Page 1 Black PMS Pro. Blue
High Pressure
Diesel Washer,
Water Break
Tank and Rotary
Jetwash Head
Hire Shops
A powerful diesel engined cold water
washer. The Water Break Tank for use
with HSS pressure washers which have
a syphoning ability. The rotary Jetwash
Head, for cleaning large floor areas.
Operating & Safety Guide 765
Release the trigger lock on the lance then squeeze
the trigger to begin work.
The spray pressure can be adjusted at the spray
lance. For low pressure turn the lances side handle
anti-clockwise.
The Jetwash head has no pressure adjustment.
The pressure can also be adjusted at the pump, to
increase pressure turn the pressure regulator clockwise,
to decrease, turn anti-clockwise.
Pump Performance
A pump’s performance depends mainly on a sufficient
supply of water. If the pump gives intermittent high or
low spray pressure during use, check the inlet hose
connections for kinks, damage and secure connection
to the pump and mains tap. Also check the water
pressure at the tap, in case the pressure has dropped
due to other services being supplied.
If syphoning, check that the supply hose and filter are
fully submerged in water, and that the filter cage has
not become blocked.
If using a break tank, check that the tanks supply is
sufficient for the demand.
If in doubt, contact your local HSS Hire Shop for advice.
BASIC TECHNIQUES
If a detergent is to be sprayed, reduce the spray
pressure at the side handle. Triggering the lance will
now draw the chemical into the system automatically.
If you then wish to spray without detergent, screw the
side handle clockwise as far as it will go, high pressure
will return. The chemicals will continue for a short while
as the residue is cleared.
Be prepared for the lance to give a kick each time
it is triggered, due to the high pressure delivered.
Start with the lance about 1.5m away from the
surface being cleaned. Squeeze the trigger and allow
the unit to build up to pressure.
Slowly move closer to the work, then increasing
the pressure if required by turning the side handle
clockwise. Note when adjusting the pressure do not
trigger the lance.
Never push the equipment beyond its design
limits. If it will not do what you want with reasonable
ease or within the time required, assume you have the
wrong size or type of washer for the job. Ask at your local
HSS Hire Shop for advice.
Keep the equipment clean. You will find this less of a
chore if you clean up regularly rather than wait until the
end of the hire.
When not in use, store the equipment somewhere
clean, dry and safe from thieves. And where it will
be protected from frost at all times.
Handle hoses with care. Never run them over sharp
edges or anywhere else that exposes them to the risk
of damage.
Keep the engine upright at all times. If it should be
tipped over, mop up oil and fuel spillage’s and contact
your local HSS Hire Shop for advice.
Regularly check the fuel level and top up as
required using the correct fuel: DERV.
Check the engine oil level daily. Let the engine cool,
stand it on level ground, withdraw the dip stick and wipe
clean. Now, replace the dip stick, withdraw it a second
time and verify that the oil level is between Min and Max.
Top up as required.
To STOP the engine, push and hold the STOP lever until
the engine dies.
Shut off the water supply and trigger the lance to
drain any remaining water.
If you have finished with the unit completely,
disconnect the pressure, suction and return hoses
FINISHING OFF
EQUIPMENT CARE
as applicable, drain out any water they contain and
coil them neatly ready for return to your local HSS
Hire Shop.
Code 59227/59259/59248
Jetwash Head
©HSS Hire Service Group Plc 1998 No. 765/01
Group Office: 25 Willow Lane, Mitcham, Surrey CR4 4TS
Web Site: http://www.hss.co.uk
Contact your local
0990 282828
…any comments?
If you have any suggestions
which would improve the
information within this guide
please fax your comments or
write to the Product Manager
at the address below
Fax: 0181-687 5001
765/01 Page 2 Black PMS Pro. Blue
For advice on the safety and suitability of this
equipment contact your local HSS Hire Shop.
This equipment has been designed to be used by
an able bodied adult. If you suffer from either a
temporary or permanent disability, you must seek
expert advice before using this equipment.
Keep children, animals and bystanders away from
the work area.
Never use this equipment if you are ill,
feeling tired, or under the influence of
alcohol or drugs.
This equipment should only be used by a
competent person who has read and understood
these instructions.
There is a serious risk of personal injury if you do
not follow all instructions laid down in this guide.
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.
Wear practical, waterproof protective
clothing, gloves and footwear. Avoid
loose garments and jewellery that could get in the way of
the work, tie back long hair.
Never carry, lift or pull the equipment by its hoses.
Check the equipment before use. If it shows signs of
damage or excessive wear, return it.
Pressure washing equipment can cause serious injury,
so take care. Never point the spray lance at anyone or
invert the jetwash head and always engage the
trigger safety lock when not actually washing.
Never direct the spray at or near anything electrical.
Take care where you lay hoses. Avoid running them
where there is a risk of someone tripping over them.
Always switch OFF the equipment when not in use.
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.
Exhaust Danger
NEVER operate diesel engines indoors or in a
confined space.
The exhaust contains gases that can Kill.
GENERAL SAFETY
Do not run the pump, with the lance trigger in the
closed position, for more than 5 minutes. The pump
needs a good flow of water to keep it cool. Without
water movement, the pump will over heat and expensive
damage will be caused.
If working above ground-level, work from a
suitable, stable platform, an access tower for
example. Never work from ladders or steps.
Watch your footing. Take special care if working other
than on firm, level ground.
Information on COSHH regulations is available from your
local HSS Hire Shop.
Place the unit on firm level ground, as far from the
work area as the pressure hose will allow.
Screw the pressure hose finger tight onto the unit’s
water outlet.
Two versions are available for hire.
The first has just one supply hose from the pump and may
be connected direct to a mains water supply, a water
break tank or can syphon from a suitable water butt.
The second has both a supply and return hose from the
pump, which in turn are both fitted to the same syphon
filter (see illustration).This unit cannot be connected
directly to a mains water supply, if a mains supply is to be
used it MUST be connected via a water break tank.
Either connect the unit’s water inlet to a suitable
tap using a hose secured to the unit’s inlet
connector with a Jubilee clip. Or where a break tank is
to be used, connect the tanks water inlet to a suitable tap
using a hose secured to the break tanks inlet connector.
Make sure it is free from kinks and sharp turns that could
impede the flow of water.
Make sure the hose has an internal diameter is of at least
15mm (1/2in).
If the Break Tank is to be used, remove the supply and
return hoses from the syphon filter and reconnect them
to the respective ports on the break tank (see illustration).
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 spillages 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.
If a mains water supply is not available, the unit is
able to syphon water from a tank provided it not
more than 2m away. If the syphon method is to be used,
the pump MUST be protected by using the correct hose
pipe and filter. Ask at your local HSS Hire Shop for details.
If a mains water supply to the unit or the break
tank is established, turn ON the water supply.
Flush out the air in the system by squeezing the
lance’s trigger until water flows freely from the nozzle.
Not that if using a break tank or syphoning the
supply, the pump can only be primed when the
engine is running.
This unit can be used to spray a mixture of water and
detergent. Simply place the chemical suction hose into
the detergent’s container.
Lock the lances trigger OFF using the trigger lock
bar (see illustration).
You may now start the engine. NOTE: The engine
MUST NOT be run without a water supply
connected, as the pump uses the water to keep it
cool and will quickly overheat if dry.
HSS diesel pressure washers come with electric
start, and a manual start backup.
For PUSH BUTTON START…
Simply push and hold the button until the engine
fires, then release. The battery will be recharged during
use, automatically.
To STOP the engine, push and hold the STOP lever until
the engine dies.
For MANUAL backup START…
To start the engine, take a firm hold of the pull
start handle with both hands. Pull the pull cord
until slight resistance is felt, then let the cord
return to the starter.
Give the pull cord a firm pull and the engine
should start, (you may have to repeat the process a
couple of times if the unit has been inactive for a while).
Push Button
Start
Fuel Tank
Pull Start
Pressure
Regulator
Pressure Hose
Connector
Syphon
Filter
Chemical
Suction
Hose
Return
Hose
Supply
Hose
Trigger
Trigger
Lock
Low
Low
High
High
Return Hose
Connector
Water
Inlet
Water
Outlet
Water Break Tank
Diesel Washer
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