Issue 9 February 2006
39
4.3 Street Washer Model – 525SW
Introduction
The street washer 525SW is a dual function machine, which can
perform both the functions of Sweeping and Street Washing. The
machine cannot Sweep and Street Wash simultaneously. However
changing over from one function to the other is relatively quick and
does not involve the use of tools.
Because street washing requires large amounts water, extra water
has to be loaded onto the machine. The water is loaded into the
refuse hopper. This is the reason the machine cannot sweep when
street washing.
The hopper contains a special filtration cartridge that is located inside
the hopper, laid along its floor. The cartridge is protected by a guard
and can be withdrawn from the side of the hopper for cleaning. When
the extra water in the hopper is used up, a 3 way valve can be turned
to allow the water in the dust suppression tanks to be used.
The street washer comprises a high-pressure reciprocating piston water pump driven by a hydraulic motor.
The pump feeds high-pressure water to a folding boom spray bar located at the front of the machine.
Operating one of the brush control joysticks can hydraulically slew this spray bar from side to side. The
joystick changes function when Street Washer is selected. The spray bar is hinged in the centre and will fold
to avoid damage if it accidentally contacts an obstacle when moving in the forward direction. The spray bar
can be folded up and stowed out of the way in front of the cab windscreen when the machine is being used as
a sweeper.
Preparing to Street Wash
The hopper must be emptied (tip the hopper) and thoroughly washed out. Check that the hopper filter is clean
by undoing the toggle clamps on the right hand side of the hopper and withdrawing the cartridge. Clean the
textile sleeve. Undo the screw cap and withdraw the stainless steel mesh filter. Clean the mesh filter if
necessary.
Fold down the hopper fan duct sealing diaphragm (to prevent
water surging out of the hopper into the suction fan casing during
braking).
Lower the hopper.
Check the pump inlet filter for cleanliness (located above the rear left hand suspension spring/damper unit).
Swing out the rear dust suppression water tank.
Open the hopper water fill/vent point on the left hand side of the hopper intake duct. Insert a 30mm water
hose and fill the hopper up to the level of the fill point – about 380 litres.
DO NOT
over fill. Close the filler/vent
cover.
DO NOT
fill the hopper through the hopper door as over filling may occur, which will overload the
vehicle.
DO NOT over fill.
STOP
