Scarab Merlin User manual

MAIN FEATURES OF A TYPICAL SCARAB SWEEPER
LEFT HAND
SUCTION NOZZLE
SERIAL NUMBER
PLATE LOCATION
LEFT HAND
SIDE BRUSH
SIDE LOADING
HATCH
HOPPER COVER
MAIN HYDRAULIC VALVES
PNEUMATIC VALVES
OIL TANK & COOLER
EXHAUST GANTRY
WATER TANK
LOCKER
RIGHT HAND
SUCTION NOZZLE
RIGHT HAND
SIDE BRUSH
WIDE SWEEP BRUSH
WANDER
HOSE
SIDE
LOADING
HATCH
DOOR
RAM
L-P WATER PUMP
Scarab Merlin
Scarab Magnum
AUXILIARY HAND PUMP
EXTERNAL HOPPER
SECOND HOPPER
RAISE BUTTON
(RHD ONLY)
& DOOR CONTROLS
FUEL TANK
ALWAYS ON NEARSIDE OF VEHICLE
& STRAINERS
WATER TANK LEVEL GAUGE
MOUNTED ON COOLER GANTRY
LOCKER
H-P FRONT
SPRAY BAR VALVE
ACCESS COVER WITH
OIL LEVEL APERTURE
FUEL TANK
DOOR LOCKING MECHANISM
& OPTIONAL FAN-WASH VALVE
ALWAYS ON NEARSIDE OF VEHICLE

OPERATOR’S MANUAL
HYDROSTATIC
TRUCK-MOUNTED
SWEEPERS
VEHICLES EQUIPPED WITH CANbus 2 CONTROLS
When re-ordering this document, please quote the following Part Number:
Manual Z032193
Original Issue ...................... April 2007
Amdt. 1 ................................Jan. 2010
This manual is published by the Technical Publications Department of Scarab Sweepers Ltd.
and every effort is made to ensure that the information it contains is correct at the time of
publication. Due to a policy of continuous development, however, the Company reserves
the right to alter the specification and to supply when so altered without reference to
illustrations and descriptions in this manual.
Scarab Sweepers Limited
Pattenden Lane, Marden, Kent TN12 9QD
Telephone: [phone] Fax: [phone]
International: [phone] International [phone]
e-mail: scarab@scarab sales.com Web site: www.scarab-sweepers.com
Publication Z032193 © Scarab Sweepers Limited 2010

SCARAB HYDROSTATIC TRUCK-MOUNTED SWEEPERS
1 Operator’s Manual - CANbus 2 Models Original Issue - 26 January 2010
GENERAL INFORMATION
WARNING - VOLTAGE SENSITIVE COMPONENTS
DO NOT USE A BOOST STARTER / SUPER START. IF BATTERIES ARE
NOT CHARGED ALWAYS USE A FRESH SET. A BOOSTED START WILL
BURN OUT THE VEHICLES ELECTRONIC CONTROL NODES.
WEIGHTS, DIMENSIONS AND CAPACITIES
Gross Vehicle Weight (GVW)
MERLIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 tonne to 12.0 tonne
MAGNUM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.0 tonne to 15.0 tonne
Payload*
MERLIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Typically 2300 kg to 6300 kg
MAGNUM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Typically 6340 kg to 8540 kg
Overall Length*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Typically 5500 mm
Front Overhang*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Typically 1240 mm
Rear Overhang* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Typically 1350 mm
Wheelbase* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Typically 3000 mm
Overall Width*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Typically 2220 mm
Overall Height (hopper lowered)* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Typically 2980 mm
Overall Height (hopper raised)* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Typically 4180 mm
Hopper Capacity
MERLIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 m3
MAGNUM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 m3
Fuel Tank Capacity*
MERLIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Typically 100 litres
MAGNUM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Typically 150 litres
Hydraulic Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 litres
Water Tank*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 900 litres to 1800 litres
* Dependent upon chassis and specification
NOTE:
In view of the fact that many of the foregoing values are subject to variables such as
chassis type and machine specification, it is not possible to quote precise details. If this
type of information is required, Scarab recommend that you contact our Technical Sales
staff giving your sweeper’s Serial Number.
TOWING
SERIOUS DAMAGE TO THE TRANSMISSION WILL RESULT IF THE VEHICLE IS TOWED WHILE THE
HYDROSTATIC DRIVE IS ENGAGED.
If towing is necessary, it is imperative that the hydrostatic drive is disengaged before making
any attempt to tow the vehicle.
IDENTIFICATION PLATES
The SERIAL NUMBER PLATE is located on the rear face of the left hand suction nozzle spigot.
The Serial Number will comprise four numerical digits only (for example 5843).
For the location of the vehicle’s VIN PLATE and CHASSIS NUMBER, refer to the chassis
manufacturers’ documentation.
LIMITATIONS OF USE
The Scarab Merlin and Magnum are classified as truck-mounted heavy-duty suction road
sweepers and, as such, are intended only for operation in the sweeping and associated roles
for which they have been expressly designed.
APPLICABILITY
This manual covers the operating requirements of the Scarab Merlin and Magnum
Hydrostatic sweepers with the CANbus 2 system. For operating information on the Unidrive
range of CANbus sweepers, please refer to Manual No. Z032194. For non CANbus versions
please refer to publications Z027055 (Hydrostatic) and Z027054 (Unidrive).

SCARAB HYDROSTATIC TRUCK-MOUNTED SWEEPERS
Amdt. 1 - 26 January 2010 Operator’s Manual - CANbus 2 Models 2
TABLE OF CONTENTS
Para Title Page
GENERAL INFORMATION.................................................................................................1
TABLE OF CONTENTS (THIS PAGE)...................................................................................2
HEALTH AND SAFETY ADVICE..........................................................................................3
EXPLANATION OF SWITCH OPERATING SYMBOLS .........................................................4
OPERATING ADVICE ........................................................................................................6
THE CANbus SYSTEM........................................................................................................7
DESCRIPTION OF MAIN CONTROL PANEL ......................................................................8
DESCRIPTION OF AUXILIARY CONTROL PANEL ............................................................13
Rear-mounted Nozzle Option ........................................................................................ 15
Additional Controls and Instruments ............................................................................. 16
OPERATING MODES.......................................................................................................17
Engaging Hydrostatic Drive............................................................................................ 17
Suction Fan Boost-setting................................................................................................ 18
Climbing Gradients ......................................................................................................... 18
Selecting Normal-Drive Mode........................................................................................ 19
Reducing Noise Levels and Fuel Consumption............................................................ 19
DISCHARGING THE HOPPER (TIPPING) .........................................................................20
Operating the Rear Door................................................................................................ 20
Operating the Hopper .................................................................................................... 21
In-cab Controls...................................................................................................... 21
External Controls ................................................................................................... 22
Closing the Rear Door ..................................................................................................... 22
USING THE AUXILIARY HYDRAULIC PUMP.....................................................................23
WANDER HOSE & WANDER BOOMS .............................................................................27
USING THE LOW-PRESSURE WATER PUMP .....................................................................29
Lubrication / Draining ..................................................................................................... 29
USING THE OPTIONAL HIGH-PRESSURE WATER PUMP ..................................................30
Oil Level / Draining .......................................................................................................... 31
OPTIONAL SUCTION FAN WASH-ASSIST SYSTEM..........................................................31
RECOMMENDED OPERATOR’S ROUTINE MAINTENANCE.............................................33
KEY MAINTENANCE PROCEDURES................................................................................35
Cleaning the Suction Fan ............................................................................................... 35
Suction Nozzle Clearances............................................................................................. 36
Side Brushes & Skirts ......................................................................................................... 36
Draining & Cleaning the Water Strainers ...................................................................... 37
Manual Greasing............................................................................................................. 38
Recommended Lubricants & Consumables................................................................ 40
Fluid Levels........................................................................................................................ 40
LEGIONELLA STATEMENT................................................................................................41
ADDITIONAL INFORMATION (if applicable to this machine)......... Inside Back Cover

SCARAB HYDROSTATIC TRUCK-MOUNTED SWEEPERS
3 Operator’s Manual - CANbus 2 Models Original Issue - 26 January 2010
HEALTH & SAFETY ADVICE
THIS OPERATORS MANUAL CONTAINS ESSENTIAL INFORMATION AND MUST
REMAIN WITH THE VEHICLE AT ALL TIMES.
IN THE INTERESTS OF YOUR HEALTH AND SAFETY, IT IS IMPORTANT THAT
THE FOLLOWING POINTS ARE OBSERVED AT ALL TIMES:
• AT NO TIME SHOULD UNQUALIFIED PERSONNEL BE PERMITTED TO OPERATE OR
WORK ON THE SCARAB SWEEPER.
• BEFORE DRIVING THE VEHICLE ENSURE THAT ALL RELEVANT VEHICLE CHECKS
HAVE BEEN CARRIED OUT, THAT ALL EQUIPMENT IS STOWED AND THAT THE
BRUSHES HAVE BEEN RAISED.
• DO NOT OVERLOAD THE HOPPER.
• DO NOT DRIVE THE VEHICLE WITH THE HOPPER IN THE RAISED POSITION, EVEN IF
THE HOPPER IS EMPTY.
• ALWAYS USE THE SAFETY PROP TO SUPPORT A RAISED HOPPER. NEVER WORK
UNDER A RAISED CAB OR HOPPER UNLESS THE APROPRIATE PROP IS IN POSITION.
• BEFORE OPERATING EITHER THE HOPPER-TIP CONTROLS OR REAR DOOR, ENSURE
THAT THERE IS SUFFICIENT CLEARANCE AND THAT IT IS SAFE TO DO SO. ENSURE
THAT ALL PERSONNEL ARE CLEAR OF THE REAR DOOR.
• BEFORE WORKING ON THE MACHINE:
POSITION THE VEHICLE ON FIRM, LEVEL GROUND, APPLY THE HANDBRAKE, STOP
THE ENGINE, REMOVE THE IGNITION KEY.
• BEFORE STARTING THE ENGINE ENSURE THAT ALL CONTROLS ARE SWITCHED OFF
AND THAT THE VEHICLE IS IN NEUTRAL.
• KEEP LONG HAIR, LOOSE CLOTHING AND HANDS AWAY FROM MOVING PARTS.
• HIGH PRESSURE WATER CAN BE HAZARDOUS, ALWAYS WEAR SUITABLE EYE
PROTECTION WHEN OPERATING THE HIGH-PRESSURE WATER PUMP AND WHEN
USING THE LANCE. DO NOT DIRECT THE WATER JET AT OTHER PERSONS. BEWARE
OF ELECTRICAL INSTALLATIONS ON PUBLIC BUILDINGS & LAMP POSTS Etc. AND
ALWAYS EXERCISE EXTREME CAUTION IN PUBLIC PLACES.
THE HAZARD SYMBOL IDENTIFIES GENERAL SAFETY RELATED TEXT
THROUGHOUT THIS DOCUMENT. WHERE APPROPRIATE, THE FOLLOWING
ADDITIONAL SAFETY SYMBOLS ARE ALSO USED: EYE PROTECTION,
PROTECTIVE FOOTWARE AND GLOVES.
The Caution Symbol identifies where the observation of a specific
procedure is required to avoid equipment damage or under-performance.
The Information Symbol identifies text offering helpful advice additional to
the main instructions.
The Check Symbol identifies text calling for a visual examination to confirm
the condition or status of a specific item.
REMEMBER, FAILURE TO COMPLY CAN RESULT IN SERIOUS INJURY.
IF IN DOUBT, ASK!

ADDITIONAL SAFETY ADVICE SYMBOLS
CHECK
VEHICLE
BEFORE
DRIVING
IN NEUTRAL
SWITCHES
OFF BEFORE
STARTING
CHECK ALL
CLEAR TO
RAISE BODY
FIRM LEVEL
GROUND
ONLY
USE CAB OR
HOPPER
SAFETY PROP
DO NOT
DRIVE WITH
BODY UP
SCARAB HYDROSTATIC TRUCK-MOUNTED SWEEPERS
Original Issue - 26 January 2010 Operator’s Manual - CANbus 2 Models 4
SWITCH OPERATING SYMBOLS
MAIN SWEEPING PANEL SWITCHES (FROM LEFT TO RIGHT & TOP TO BOTTOM)
SPARE  (Additional information is appended at back of manual when
these switches are used to operate non-standard optional equipment).
HAZARD WARNING BEACONS
HYDROSTATIC DRIVE
HIGH PRESSURE FRONT SPRAY BAR - RAISE / LOWER.
The spray bar will operate in either position.
SIDE BRUSH - ON / OFF
SUCTION NOZZLE - RAISE / LOWER
WIDESWEEP BRUSH - ON / OFF
SIDE BRUSH & SUCTION NOZZLE WATER SPRAYS - ON / OFF
SUCTION NOZZLE ADDITIONAL WATER - ON / OFF 
WIDESWEEP WATER SPRAYS - ON / OFF
WORK LIGHTS - ON / OFF
SIDE BRUSH PRESSURE - UP 
SIDE BRUSH PRESSURE - DOWN 
WIDESWEEP PRESSURE - UP 
WIDESWEEP PRESSURE - DOWN 
Continued...

SCARAB HYDROSTATIC TRUCK-MOUNTED SWEEPERS
5 Operator’s Manual - CANbus 2 Models Original Issue - 26 January 2010
SUCTION FAN - ON / BOOST
BRUSH SPEED ADJUSTMENT
FRONT BRUSH - RAISE / LOWER 
FRONT BRUSH - IN / OUT 
FRONT BRUSH + WATER SPRAY - ON 
HOPPER BODY - RAISE / LOWER
SAFETY INTERLOCK - HOPPER & REAR DOOR
REAR DOOR - OPEN
REAR-MOUNTED SUCTION NOZZLE OPTION
REAR NOZZLE - RAISE / LOWER 
REAR NOZZLE - TILT 
REAR WORK LIGHTS - ON / OFF 
AUXILIARY (DOOR) PANEL SWITCHES
SIDE BRUSH IN/OUT (This feature will also be activated when using the
multi-function switch to control side brush IN/OUT movement.
CRUISE CONTROL (PEDAL POSITION ONLY) / SPARE FOR OPTION
HIGH PRESSURE WATER PUMP 
SUCTION NOZZLE TILT
LED
COMBINED BRUSH MASTER / MULTI-FUNCTION SWITCH - RAISES / LOWERS
ACTIVE SWEEP GEAR + SIDE BRUSH IN/OUT + VARIABLE-NOZZLE-TILT
 THIS SYMBOL INDICATES OPTIONAL EQUIPMENT FITS.
SWITCH OPERATING SYMBOLS

LCD SCREEN INFORMATION
SWEEP MODE (PANEL ON)
UPPER ROW SUCTION FAN SPEED
LOWER ROW
ROAD SPEED / ANY ACTIVE WARNINGS (SEE BELOW)
COMMON WARNINGS (number & text) & OPERATING CONDITIONS BUZZER
1: LOW OIL LEVEL, STOP (Engine running / All switches disabled *)YES
6: LOW OIL LEVEL (Engine NOT running / All switches disabled *)NO
2: HIGH OIL TEMP (Panel is ON / Engine running) YES
3: LOW BATTERY (When battery signal less than 23 Volts) YES
4: LOW WATER (Panel is ON / H-P pump switch is disabled) NO
5: HOPPER UP NO
8: LOAD INDICATOR (optional) NO
DRIVE MODE (IGN ON / PANEL OFF)
UPPER ROW SCARAB SWEEPERS
LOWER ROW ENGINE SPEED (rpm)
*All switches EXCEPT Panel ON/STANDBY, Work-lights and Beacons are disabled.
SCARAB HYDROSTATIC TRUCK-MOUNTED SWEEPERS
Original Issue - 26 January 2010 Operator’s Manual - CANbus 2 Models 6
OPERATING ADVICE
Please remember, the information provided in this handbook is designed
to ensure that the Scarab sweeper operates both safely and efficiently.
A poorly maintained machine will become unreliable, inefficient and
potentially dangerous. Always observe the recommended maintenance
and safety related advice provided.
Many supposed operating problems can be traced to a lack of simple
daily maintenance. Going out to sweep in a machine that has blocked
screens, a dirt encrusted suction fan, poorly adjusted suction nozzles or
brushes is not only a waste of time; it is also a waste of fuel.
Unless it is wet or raining, ALWAYS use the low-pressure water spray system
when sweeping. This will not only reduce the amount of dust generated, it
will also ensure more efficient collection of material. This is because wet
material is heavier and will drop more readily from the air stream inside the
hopper. If swept dry more of the finer material will pass through the
screens, wearing out the fan blades on its way back to the environment
behind you.

SCARAB HYDROSTATIC TRUCK-MOUNTED SWEEPERS
7 Operator’s Manual - CANbus 2 Models Original Issue - 26 January 2010
THE CANbus SYSTEM (* INDICATES OPTIONAL EQUIPMENT)
The CANbus system comprises two control panels (main and auxiliary) and
a number of control nodes (normally seven). The system controls and
monitors all sweeper functions and maintains a log of various operating
parameters such as operating hours and any fault conditions that might
occur. The main panel contains a microchip which holds all the program
information and the data logs.
Control nodes: These are located adjacent to the systems they control.
Switches: The CANbus control panels use touch switches; these are
covered by a flexible overlay to identify their functions. The various types
of switch function are grouped in two ways.
Firstly they are colour coded as follows:
ORANGE = Electrical functions such as lighting.
RED = Critical functions (e.g. Hopper Raise).
PALE GREEN = Sweeping functions.
BLUE = Water Spray functions.
Secondly, switches that control functions that are available either on/or
with both sides of the machine, e.g. side brushes and widesweep, are
grouped with left, right and centre function controls being positioned
accordingly on the panel. These are positioned within the light grey area
in the centre of the control panel.
Each switch has a red LED located at its upper left hand corner. This
illuminates when the switch is ON (latched) or PRESSED (non-latching).
Most switches are of the latching type (press once to turn ON and again
to turn OFF) however there are a number of non-latching switches. These
will only function while they are held down and are as follows:
(a) Safety Interlock
(b) Hopper Body RAISE
(c) Hopper Body LOWER
(d) Rear Door OPEN
(e) Sweep Master - Multi-function Switch (detented to the central
(Master ON) position from the side brush and nozzle-tilt positions.
The main panel also incorporates a Liquid Crystal Display (LCD) screen
and a light-sensor.
The LCD provides real-time information relevant to the operating status of
the machine, in the form of warnings or feed-back, and acts as the system
inter-face when using the self-diagnostic facility.
The light-sensor automatically controls the switch/LCD back-lighting to
ensure legibility in low light conditions.

SCARAB HYDROSTATIC TRUCK-MOUNTED SWEEPERS
Original Issue - 26 January 2010 Operator’s Manual - CANbus 2 Models 8
MAIN PANEL SWITCH DESCRIPTIONS
Switch functions are described from Left to Right and Top to Bottom.
MASTER SWEEP
Switches that are fully enabled ONLY when the Master Switch is
ON or Sweep Mode is ON are identified by the following symbols.
Fig. 1 Main Control Panel Layout
BEACONS
LEFT HAND
LEFT NOZZLE
WIDESWEEP
LEFT SIDE WATER
EXTRA WATER
RIGHT HAND
RIGHT NOZZLE
RIGHT SIDE WATER
EXTRA WATER
LEFT SIDE RIGHT SIDE
SIDE BRUSH UP/ WIDESWEEP UP/
INCREASE BRUSH SPEED
HOPPER RAISE/LOWER
SAFETY INTERLOCK
HOPPER DOOR
LIQUID CRYSTAL DISPLAY AMBIENT LIGHT
SENSOR
(LCD SCREEN)
WORK LIGHTS
DOWN PRESSURE *
RIGHT NOZZLE *
RAISE/LOWER
SIDE-BRUSH
WORK LIGHTS
DOWN PRESSURE *
SIDE-BRUSH
RAISE/LOWER
LEFT NOZZLE *
SUCTION FAN
FAN BOOST OPEN
WIDESWEEP WATER
MAIN PANEL
When in Sweep Mode:
UPPER LINE = FAN SPEED
LOWER LINE = ROAD SPEED / WARNINGS
H-P WATER PUMP * ENGINE SPEED
DECREASE
ENGINE SPEED
*OPTIONAL EQUIPMENT
SWEEP MODE
REAR WORK LAMPS *
SPARE (OPTIONS)
SPARE (OPTIONS)
INCREASE
X
N
A
FUNCTION IS NOT APPLICABLE
IN THIS SWEEPER CONFIGURATION
X
N
A
AUXILIARY BRUSH RAISE/LOWER *
ON/OFF + WATER SPRAY *
SWING IN/OUT *
F1 / F2 SWITCHES - Press to activate special options when fitted.
BEACON SWITCH -Press to operates all hazard beacons fitted to the
vehicle. Red LED illuminates when active.
HIGH-PRESSURE SPRAY BAR RAISE LOWER SWITCH *- Press to lower the
spray bar. The red LED will illuminate when the feature is selected.
The switch is not enabled until the H-P pump is switched ON.
Switching the pump OFF will cause the spray bar to be raised.
Continued...

SCARAB HYDROSTATIC TRUCK-MOUNTED SWEEPERS
9 Operator’s Manual - CANbus 2 Models Original Issue - 26 January 2010
HYDROSTATIC GEARBOX SWITCH - Press to engage hydrostatic drive.
The RED LED lights when in conventional drive mode and the GREEN
LED indicates when the vehicle is in hydrostatic drive mode.
ENGINE SPEED DECREASE - Press and hold until engine speed has
reduced to the required level. The red LED will illuminate while the
switch is active.
ENGINE SPEED INCREASE - Press and hold until engine speed has
increased to the required level. The red LED will illuminate while the
switch is active.
LEFT HAND SIDE-BRUSH SWITCH - Press to start the side-brush. The red
LED illuminates when the feature is selected. On single-sweep
machines the non-sweeping side’s switch/LED will not illuminate. See
also side brush SWING IN/OUT.
LEFT HAND SUCTION NOZZLE RAISE/LOWER SWITCH - Press to lower the
suction nozzle. The red LED illuminates when the feature is selected.
On single-sweep machines the non-sweeping side’s switch / LED will
not illuminate.
WIDESWEEP BRUSH SWITCH - Press to start the widesweep brush. The
brush will lower to the sweeping position and, on dual sweep
machines, will swivel to the primary sweeping side unless over-
ridden. The red LED illuminates when the feature is selected.
RIGHT HAND SUCTION NOZZLE RAISE/LOWER SWITCH - Press to lower
the suction nozzle. The red LED illuminates when the feature is
selected. On single-sweep machines the non-sweeping side’s
switch/LED will not illuminate.
RIGHT HAND SIDE-BRUSH SWITCH - Press to start the side-brush. The
red LED illuminates when the feature is selected. On single-sweep
machines the non-sweeping side’s switch/LED will not illuminate. See
also side brush SWING IN/OUT switch.
LEFT HAND SIDE-BRUSH/NOZZLE WATER SWITCH - Press to start the
dust-suppression water jets for the side-brush and suction nozzle. The
red LED illuminates when the feature is selected.
LEFT HAND SUCTION NOZZLE - ADDITIONAL WATER SWITCH *- Press to
start the additional water jets for the suction nozzle. The red LED
illuminates when the feature is selected.
WIDE SWEEP WATER SWITCH - Press to start the dust-suppression water
jets for the widesweep brush. The red LED illuminates when the
feature is selected.
RIGHT HAND SUCTION NOZZLE - ADDITIONAL WATER SWITCH *- Press
to start the additional dust-suppression water jets for the suction
nozzle. The red LED illuminates when the feature is selected.

Fig. 2 Main Control Panel Layout
BEACONS
LEFT HAND
LEFT NOZZLE
WIDESWEEP
LEFT SIDE WATER
EXTRA WATER
RIGHT HAND
RIGHT NOZZLE
RIGHT SIDE WATER
EXTRA WATER
LEFT SIDE RIGHT SIDE
SIDE BRUSH UP/ WIDESWEEP UP/
INCREASE BRUSH SPEED
HOPPER RAISE/LOWER
SAFETY INTERLOCK
HOPPER DOOR
LIQUID CRYSTAL DISPLAY AMBIENT LIGHT
SENSOR
(LCD SCREEN)
WORK LIGHTS
DOWN PRESSURE *
RIGHT NOZZLE *
RAISE/LOWER
SIDE-BRUSH
WORK LIGHTS
DOWN PRESSURE *
SIDE-BRUSH
RAISE/LOWER
LEFT NOZZLE *
SUCTION FAN
FAN BOOST OPEN
WIDESWEEP WATER
MAIN PANEL
When in Sweep Mode:
UPPER LINE = FAN SPEED
LOWER LINE = ROAD SPEED / WARNINGS
H-P WATER PUMP * ENGINE SPEED
DECREASE
ENGINE SPEED
*OPTIONAL EQUIPMENT
SWEEP MODE
REAR WORK LAMPS *
SPARE (OPTIONS)
SPARE (OPTIONS)
INCREASE
X
N
A
FUNCTION IS NOT APPLICABLE
IN THIS SWEEPER CONFIGURATION
X
N
A
AUXILIARY BRUSH RAISE/LOWER *
ON/OFF + WATER SPRAY *
SWING IN/OUT *
SCARAB HYDROSTATIC TRUCK-MOUNTED SWEEPERS
Original Issue - 26 January 2010 Operator’s Manual - CANbus 2 Models 10
RIGHT HAND SIDE-BRUSH/NOZZLE WATER SWITCH - Press to start the
dust-suppression water jets for the side-brush and suction nozzle. The
red LED illuminates when the feature is selected.
LEFT HAND WORK-LIGHTS - Press to turn the work-lights ON. The red LED
illuminates when the feature is selected.
Please refer to Page 16 for details on pre-setting the brush air pressure-regulator
for use with the following four control switches.
SIDE-BRUSH ‘UP’ PRESSURE SWITCH *- Press to allow a controlled
amount of pressure to the bottom of the brush lift ram(s) and reduce
the brush’s surface pressure. Use in conjunction with the air-pressure
regulator. The red LED illuminates when the feature is selected. Will affect
both side brushes, when both selected, on dual sweep machines.
Continued...

SCARAB HYDROSTATIC TRUCK-MOUNTED SWEEPERS
11 Operator’s Manual - CANbus 2 Models Original Issue - 26 January 2010
SIDE-BRUSH ‘DOWN’ PRESSURE SWITCH *- Press to allow a controlled
amount of pressure to the top of the brush lift ram and increase the
brush’s surface pressure. Use in conjunction with the air-pressure
regulator. The red LED illuminates when the feature is selected. Will
affect both side brushes, when both selected, on dual sweep
machines.
WIDESWEEP ‘UP’ PRESSURE SWITCH *- Press to allow a controlled
amount of pressure to the bottom of the brush lift ram(s) and reduce
the brush’s surface pressure. Use in conjunction with the air-pressure
regulator. The red LED illuminates when the feature is selected.
WIDESWEEP ‘DOWN’ PRESSURE SWITCH *- Press to allow a controlled
amount of pressure to the top of the brush lift ram(s) and increase
the brush’s surface pressure. Use in conjunction with the air-pressure
regulator. The red LED illuminates when the feature is selected.
RIGHT HAND WORK-LIGHTS - Press to turn the work-lights ON. The red LED
illuminates when the feature is selected.
SUCTION FAN SWITCH - Press to start the fan. Red LED illuminates
when the fan is ON. Fan speed (approximately 2000 rpm) is
displayed on the LCD screen. This switch remains active when the
fan-boost switch is pressed.(See also Fan Boost switch)
BRUSH SPEED (+) SWITCH - Press to increase brush speed to 125 rpm.
The red LED illuminates when the feature is active. Press again to
return to normal brush speed (If Brush Speed (++) is selected (See
Page 12) when this feature is active Brush Speed (+) will be
automatically deselected).
FRONT BRUSH RAISE/LOWER SWITCH - Press to lower the front brush
assembly. The red LED illuminates when the feature is selected.
FRONT BRUSH ON/OFF + WATER SPRAY SWITCH - Press to start the front
brush and simultaneously turn on the dust suppression water spray.
The red LED illuminates when the feature is selected.
HOPPER RAISE SWITCH - Press and hold down simultaneously with the
safety interlock switch to raise the hopper. the red LED illuminates as
soon as the hopper starts to rise.
For details of externally mounted hopper controls refer to Page 22.
SAFETY INTERLOCK SWITCH - Press and hold while operating the in-
cab hopper or rear door switches. The red LED illuminates when the
switch is activated.
SUCTION FAN ‘BOOST’ SWITCH - Press to activate the fan boost
mode. This increases fan speed to approx. 2200 rpm. The red LED
illuminates while the feature is selected and the fan speed indicated
on the LCD will change to show approximately 2200 rpm. Press again
to revert to normal fan speed.

Fig. 3 Main Control Panel Layout
BEACONS
LEFT HAND
LEFT NOZZLE
WIDESWEEP
LEFT SIDE WATER
EXTRA WATER
RIGHT HAND
RIGHT NOZZLE
RIGHT SIDE WATER
EXTRA WATER
LEFT SIDE RIGHT SIDE
SIDE BRUSH UP/ WIDESWEEP UP/
INCREASE BRUSH SPEED
HOPPER RAISE/LOWER
SAFETY INTERLOCK
HOPPER DOOR
LIQUID CRYSTAL DISPLAY AMBIENT LIGHT
SENSOR
(LCD SCREEN)
WORK LIGHTS
DOWN PRESSURE *
RIGHT NOZZLE *
RAISE/LOWER
SIDE-BRUSH
WORK LIGHTS
DOWN PRESSURE *
SIDE-BRUSH
RAISE/LOWER
LEFT NOZZLE *
SUCTION FAN
FAN BOOST OPEN
WIDESWEEP WATER
MAIN PANEL
When in Sweep Mode:
UPPER LINE = FAN SPEED
LOWER LINE = ROAD SPEED / WARNINGS
H-P WATER PUMP * ENGINE SPEED
DECREASE
ENGINE SPEED
*OPTIONAL EQUIPMENT
SWEEP MODE
REAR WORK LAMPS *
SPARE (OPTIONS)
SPARE (OPTIONS)
INCREASE
X
N
A
FUNCTION IS NOT APPLICABLE
IN THIS SWEEPER CONFIGURATION
X
N
A
AUXILIARY BRUSH RAISE/LOWER *
ON/OFF + WATER SPRAY *
SWING IN/OUT *
SCARAB HYDROSTATIC TRUCK-MOUNTED SWEEPERS
Original Issue - 26 January 2010 Operator’s Manual - CANbus 2 Models 12
BRUSH SPEED (++) SWITCH - Press to increase brush speed to 150 rpm.
The red LED illuminates when the feature is active. If this feature is
selected when Brush Speed (+) is already active it will automatically
deselect Brush Speed (+). Press again to revert to normal brush speed.
FRONT BRUSH SWING IN/OUT SWITCH - Press to swing the brush our
and press again to swing it in. The red LED illuminates while the brush
is in the swung OUT position.
REAR WORK-LIGHTS SWITCH *- Press to turn on the rear-mounted
work-lights. The red LED illuminates while the feature is active.
HOPPER LOWER SWITCH - Press and hold down simultaneously with
the safety interlock switch to lower the hopper. the red LED will
remain illuminated until the hopper is fully in the lowered position.
Continued...

SCARAB HYDROSTATIC TRUCK-MOUNTED SWEEPERS
13 Operator’s Manual - CANbus 2 Models Original Issue - 26 January 2010
REAR DOOR OPEN SWITCH - Press and hold down simultaneously with
the safety interlock switch to open the rear door. Red LED illuminates
when the switch is operated.
Ensure that the suction fan is OFF. The door cannot open while the fan is running
due to low pressure in the hopper. External rear door controls are on Page 23.
THE LCD SCREEN
The LCD Screen provides information on fluid level/temperature warnings
and confirmation of sweeper functions.
AUXILIARY SWITCH PANEL (Located Adjacent To Driver’s Door)
FORWARD/REVERSE LEVER - Lift collar to release from Neutral and
move the lever in the desired direction to activate the hydrostatic
transmission. All active functions will stop and/or retract.
SIDE BRUSH SWING IN/OUT SWITCH - Press to swing brushes OUT. Press again
to swing brushes IN. Red LED illuminates while the brushes are in the swung
OUT position. Will also be activated by using the multi-function switch.
CRUISE CONTROL - Press to activate cruise control. The red LED illuminates
when the feature is selected.
HIGH-PRESSURE WATER PUMP SWITCH * - Press to start the H-P water
pump. The red LED will illuminate when the feature is selected. The
switch becomes disabled (symbol not illuminated) and the pump
will not operate if the water level in the tank is insufficient.
NOZZLE TILT SWITCH (MOMENTARY MODE) - Press and hold to tilt the
suction nozzle for larger items, such as bottles. The red LED illuminates
when the switch is activated. Release the switch to revert to cancel.
FOUR-POSITION MULTI-FUNCTION SWITCH - Move the switch back (upright
position) to turn the Master Switch function ON (deploys all selected
sweeping equipment). The LED at the centre of the switch panel
illuminates when the Master Switch is active. To stop and raise all sweeping
equipment, return the switch to the OFF position.
In the ON position the switch can be used to control additional functions.
These positions are detented to the central position:
ON LEFT HAND DRIVE VEHICLES
Move the switch to the left to swing the side brush(es) OUT.
Move the switch to the right to swing the side brush(es) IN.
ON RIGHT HAND DRIVE VEHICLES
Move the switch to the right to swing the side brush(es) OUT.
Move the switch to the left to swing the side brush(es) IN.
NOZZLE-TILT FUNCTION
On machines with hydraulic nozzle-tilt, move the switch back to ‘nudge’
the suction nozzle DOWN from the LOCKED OPEN position.
On machines with pneumatic nozzle-tilt, move the switch back to
momentarily tilt the suction nozzle or close it from LOCKED OPEN.

Fig. 4 Main & Auxiliary (Door) Panel Layouts
CRUISE CONTROL
HIGH-PRESSURE WATER PUMP *
SIDE BRUSH SWING IN/OUT
MULTI-FUNCTION SWITCH
SUCTION NOZZLE TILT
AUXILIARY (DOOR) PANEL
FORWARD/REVERSE LEVER
X
N
A
FUNCTION IS NOT APPLICABLE
IN THIS SWEEPER CONFIGURATION
F
R
N
BEACONS
LEFT HAND
LEFT NOZZLE
WIDESWEEP
LEFT SIDE WATER
EXTRA WATER
RIGHT HAND
RIGHT NOZZLE
RIGHT SIDE WATER
EXTRA WATER
LEFT SIDE RIGHT SIDE
SIDE BRUSH UP/ WIDESWEEP UP/
INCREASE BRUSH SPEED HOPPER RAISE/LOWER
SAFETY INTERLOCK
HOPPER DOOR
LIQUID CRYSTAL DISPLAY AMBIENT LIGHT
SENSOR
(LCD SCREEN)
WORK LIGHTS
DOWN PRESSURE *
RIGHT NOZZLE *
RAISE/LOWER
SIDE-BRUSH
WORK LIGHTS
DOWN PRESSURE *
SIDE-BRUSH
RAISE/LOWER
LEFT NOZZLE *
SUCTION FAN
FAN BOOST OPEN
WIDESWEEP WATER
MAIN PANEL
When in Sweep Mode:
UPPER LINE = FAN SPEED
LOWER LINE = ROAD SPEED / WARNINGS
H-P WATER PUMP *
* OPTIONAL EQUIPMENT
AUXILIARY BRUSH RAISE/LOWER *
ON/OFF + WATER SPRAY *
SWING IN/OUT *
REAR WORK LAMPS *
SPARE (OPTIONS) SPARE (OPTIONS)
ENGINE SPEED
DECREASE
ENGINE SPEED
INCREASE
RAISE/LOWER
X
N
A
SWEEP MODE
(Shown in OFF position)
MASTER SWITCH ‘ON’ LED
Left hand drive panel shown,
right hand drive is mirror image
SCARAB HYDROSTATIC TRUCK-MOUNTED SWEEPERS
Original Issue - 26 January 2010 Operator’s Manual - CANbus 2 Models 14

SCARAB HYDROSTATIC TRUCK-MOUNTED SWEEPERS
15 Operator’s Manual - CANbus 2 Models Original Issue - 26 January 2010
REAR-MOUNTED SUCTION NOZZLE OPTION
It is possible to equip Magnum models with a special hopper door
assembly that incorporates a pair of rear-mounted suction nozzles and
their associated high-pressure water spray bars. The inclusion of this option
in the vehicle specification requires a different main control panel to the
standard layout. This involves changes to the two lower-most rows of
switches (Refer to Fig. 5). To incorporate the rear nozzle controls the
following switches have been relocated:
• Front brush On + Water
• Front brush Raise/Lower
• Front brush Swing IN/OUT
and the following switches have been removed:
•Safety Interlock for Hopper and Rear Door
• Hopper RAISE / LOWER
• Rear door OPEN
To activate the hopper and rear door controls, use the external switches
mounted adjacent to the near side suction tube (refer to Pages 20 to 22).
Fig. 5 Alternative Control Panel layout - Rear-Mounted Suction Nozzles
REAR NOZZLES
RAISE/LOWER *
REAR NOZZLES
TILT *
REAR WORK LIGHTS *
FRONT BRUSH ON/OFF
FRONT BRUSH RAISE/LOWER *
FRONT BRUSH SWING IN/OUT *
SPARE SWITCHES
FOR OPTIONAL FUNCTIONS
+ WATER
*OPTIONAL EQUIPMENT
*
when the Magnum Plus control panel is fitted, it is not possible to
accommodate the normal hopper and rear door controls. In
these circumstances the hopper and door are controlled using
the externally-mounted switches (refer to Pages 20 to 22).

SCARAB HYDROSTATIC TRUCK-MOUNTED SWEEPERS
Original Issue - 26 January 2010 Operator’s Manual - CANbus 2 Models 16
ADDITIONAL CONTROLS & INSTRUMENTS
Do not exceed a pressure of 2.5 bar when adjusting brush pressure settings.
Failure to comply will result in drastically reduced brush life.
PRESSURE REGULATOR
PRESSURE GAUGE
Externally mounted widesweep pressure
controls shown.
The side-brush controls are similar but mounted
in the cab and positioned according to cab layout
or customer preference.
AIR-PRESSURE REGULATOR *-
Used to adjust the amount of up/
down-thrust applied to the brush(es)
¤.
AIR-PRESSURE GAUGE *- Indicates the
amount of pressure being applied to
the brush(es) ¤.
¤Side-brush regulators/gauges are
mounted inside the cab.
Widesweep regulators/gauges
are located externally to the rear
of the near-side suction spigot
This function is only effective while the relevant brushes are fully deployed.
CONTROLS FOR OVERHEAD WANDER
BOOM OPTION - These are mounted
just above the wander boom handle
and consist of two buttons for
selecting the fan extra-boost speed
(2500 rpm) and/or the low-pressure
dust suppression water supply.
The action of these buttons dictates
that a firm application of pressure is
required before they can be activated.
When activated they will lock in the
down (ON) position until released by
rotating them in the direction indicated
by the arrows.

SCARAB HYDROSTATIC TRUCK-MOUNTED SWEEPERS
17 Operator’s Manual - CANbus 2 Models Original Issue - 26 January 2010
OPERATING MODES
There are two driving modes, Normal & Hydrostatic (Sweep), these
are selected using the SWEEP MODE switch on the control panel.
This switch has two LEDs, one green and one red. These are used to
indicate which drive mode is currently in operation as follows:
• Green = Normal drive mode
• Red = Hydrostatic drive (sweep mode)
ENGAGING HYDROSTATIC DRIVE
REFER TO THE HEALTH & SAFETY INFORMATION ON Page 3
The engine must be running and the air tanks/pneumatic system must be fully
pressurised before attempting to engage hydrostatic drive mode.
The hydrostatic gearbox has a motion sensor. This will not allow engagement of
hydrostatic drive until the vehicle is stationary.
1. Switch on hazard warning beacons.
2. Stop the vehicle apply the parking brake and select Neutral.
3. With the engine running, depress the clutch pedal and press
the Sweep Mode switch. The switch’s LED indicators will
change from GREEN to RED, confirming that hydrostatic
drive has engaged successfully.
4. Select the highest forward gear available and release the clutch
pedal. The vehicle is now in hydrostatic drive and may be driven
without use of the clutch.
If the green LED flashes ON/OFF or you hear gears grating, the drive gears in the
transfer box have not meshed correctly. If the clutch is engaged at this point
while the parking brake is applied, the engine will probably stall. Refer to Step 5.
5. If Hydrostatic drive fails to engage, press Sweep Mode to restore
Normal Drive mode. Engage first gear, release the hand brake and
move the vehicle forward slightly. Repeat Steps 2. to 4.
6. Set the required engine speed by means of the
engine speed +/- controls on the main panel.
7. Switch on the suction fan, selecting Normal (approx.
2000 rpm) or Boost (approx. 2200 rpm) as required. If
Boost is selected (Page 18) remember that increased
engine speed might be necessary. Fan speed can be
confirmed by referring to the LCD on the main panel.
8. Select the desired configuration of brushes/suction boxes and
water sprays (any combination of brushes and water can be
selected). Switch on work-lights as required.
9. Move the Multi-Function Switch (located on the auxiliary
control panel) to the Sweep Master Switch ON position to
start and deploy the pre-selected sweeping equipment.