Scarab Merlin Manual

TRUCK MOUNTED SWEEPING MACHINES
Technical operating and basic maintenance instructions
This document contains important Health & Safety advice and must remain with the Machine at all times
Uni-drive

Part No. SCAZ038022 2.4.1 E&OE
Unidrive Truckmounted Road Sweeper
MERLIN
UNI-DRIVE
LIN
I-DRIVE
MERLIN
UNI-DRIVE
1
2
3
4
5
6
7
3
8
9
10 11
12
13
14 15
16
17
1. Water tank
2. Locker
3. Side loading hatch
4. Door open/close ram
5. Rear wander hose (standard)
6. Fuel tank
(orientation determined on chassis type)
7. LP water pump and valves
8. Widesweep brush assembly
9. LP and/or HP spraybar
10. HP front spraybar shut-off valve (option)
11. Pneumatic system cabinet
12. Main hydraulic valve block access cover
13. Hydraulic oil cooler location
14. Side brush assembly
15. Suction nozzle assembly
16. Auxiliary hand pump
17. HP retractable hose (option)
(orientation determined on chassis type)
18. Rear door locking mechanism
18

Part No. SCAZ038022 2.4.1 E&OE
ENGLISH
MERLIN - MERLIN XP - MAGNUM
OPERATING INSTRUCTIONS FOR UNIDRIVE VEHICLES
Incorporating Basic Operator’s Maintenance Information
When re-ordering this document, please quote the following Part Number:
Part No. SCAZ038022
Version: 2.4.1..............................................March 2018
To download the latest copy of this manual, scan the below QR code or visit our website
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, England
T: [phone] - F: [phone]
E: [email protected] -W: scarab-sweepers.com
Registered in England No.1823459 - VAT No. GB 374 5002 68
Registered Office: Pattenden Lane, Marden, Tonbridge, Kent TN12 9QD, England Copyright ©2018 Scarab Sweepers Limited

Part No. SCAZ038022 2.4.1 E&OE
Operating Instructions - Unidrive Truckmounted Road Sweeper
GENERAL INFORMATION
WARNING - VOLTAGE SENSITIVE COMPONENTS.
DO NOT USE A BOOST STARTER / SUPER START, A BOOSTED START WILL BURN OUT THE VEHICLES ELECTRONIC CONTROL NODES, IF BATTERIES
ARE NOT CHARGED ALWAYS USE A FRESH SET.
TYPICAL WEIGHTS, DIMENSIONS AND CAPACITIES
GROSS VEHICLE WEIGHT (GVW)*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 to 18 tonne
GROSS VEHICLE WEIGHT (GVW)* MAGNUM . . . . . . . . . . . . . . . . . . . . . . . . . . .15 to 18 tonne
OVERALL HEIGHT (hopper lowered)* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3000 to 3500mm
OVERALL LENGTH* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5640 to 7500mm
OVERALL WIDTH (brushes stowed)* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2500mm
HOPPER GROSS VOLUME* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5³ to 8.2³ Gross
TANK CAPACITY*
Fuel Tank* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Typically 100 to 150 litres
Hydraulic Tank. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 litres
Water Tank* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 900 litres to 4500 litres
NOISE LEVELS
In cab . . . . . . . . . . . . . . . . . . . . . . . . . . Between 70 - 84 dB(A) dependent on operating speed
External . . . . . . . . . . . .Maximum LWA of 114 dB(A) in accordance with directive 2000/14/EC
VIBRATION
Description . . . All dynamic prime moving components are resiliently mounted to minimise
vibrations.In accordance with 2006/42/EC as amended.
Whole body . . . . . . . . . . . . . . . . . . . . . Equipment does not exceed 0.5 m/s² (RMS, weighted)
Hand & Arm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Equipment does not exceed 2.5 m/s² (VTV)
* Dependent upon model
In view of the fact that many variables such as chassis and machine specification
affect the weight and dimensions of the finished machine, it is not possible to quote
these precise details. If this type of information is required, please 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 GEARBOX IS ENGAGED.
If towing is necessary, it is imperative that the prop shaft is disengaged from the differential
or that the rear wheels are clear of the ground 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, Merlin XP 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.
The sweeper bodywork is integrated to the truck/carrier vehicle, and is therefore not
demountable.
APPLICABILITY
This manual covers the operating requirements of the Scarab Merlin, Merlin XP and
Magnum Hydrostatic sweepers with the CANbus 3 system.
CB Radios and other electrical equipment used in the sweeper should be
properly suppressed (EMC) to prevent the possibility of interference in the
sweeper electronic system
Warning

Part No. SCAZ038022 2.4.1 E&OE
Operating Instructions - Unidrive Truckmounted Road Sweeper
TABLE OF CONTENTS
Para Title Page
GENERAL INFORMATION
TABLE OF CONTENTS
HEALTH & SAFETY ADVICE ..................................................................... 1
OPERATING ADVICE ............................................................................... 3
THE CANbus SYSTEM ............................................................................. 5
MAIN CONTROL PANEL SWITCH FUNCTIONS ................................. 6
REMOTE-CONTROL SWITCH BOX FUNCTIONS ................................ 8
THE LCD MONITOR ......................................................................... 9
ADDITIONAL CONTROLS & INSTRUMENTS .................................. 10
BRUSH PRESSURE ......................................................................... 10
OPERATING IN SWEEP MODE .............................................................. 11
Sweeping ...................................................................................... 11
Suction fan boost setting .............................................................. 12
Exiting sweep mode ...................................................................... 12
Engaging the reduction gearbox (scarab option only) .................. 13
Disengaging the reduction gearbox (scarab option only) ............. 13
DISCHARGING THE HOPPER (TIPPING) ................................................ 14
USING THE AUXILIARY HYDRAULIC PUMP ........................................... 15
STANDARD WANDER HOSE.................................................................. 16
Using the standard wander hose .................................................. 16
Using the rear mounted wander hose .......................................... 17
............................................................................................................. 17
Using the overhead wander boom ............................................... 18
USING THE DUST SUPPRESSION SYSTEM............................................. 19
Filling the water tank .................................................................... 19
Using the low pressure water system .......................................... 19
Para Title Page
USING THE HIGH-PRESSURE WATER SYSTEM (OPTION)...................... 20
Hand lance detergent option ........................................................21
Retractable hose ...........................................................................21
The water pump should NEVER be permitted to run dry. .............21
CLEARING A BLOCKAGE IN THE SUCTION PATH .................................. 22
RECOMMENDED OPERATOR’S ROUTINE MAINTENANCE ................... 24
KEY MAINTENANCE PROCEDURES....................................................... 25
Cleaning the suction fan and screen .............................................25
HYDRAULIC OIL TANK ....................................................................26
Suction nozzle clearances ..............................................................27
Side brushes & skirts .....................................................................27
Removing & cleaning the water pump element(s) .......................28
Manual greasing & lubrication ......................................................29
LCD MONITOR - OPTIONS SCREEN ...................................................... 30
OPERATOR’S NOTES

Part No. SCAZ038022 2.4.1 1E&OE
Operating Instructions - Unidrive Truckmounted Road Sweeper
HEALTH & SAFETY ADVICE
IN THE INTERESTS OF YOUR HEALTH AND SAFETY, IT IS IMPORTANT THAT
THE FOLLOWING POINTS ARE OBSERVED AT ALL TIMES:
• ONLY TRAINED OPERATIVES SHOULD BE ALLOWED TO DRIVE OR WORK ON
THIS MACHINE.
• BEFORE DRIVING THE MACHINE ENSURE THAT ALL RELEVANT MACHINE
CHECKS HAVE BEEN CARRIED OUT, THAT ALL EQUIPMENT IS STOWED.
• DO NOT OVERLOAD THE HOPPER.
• DO NOT DRIVE THE MACHINE WITH THE HOPPER IN THE RAISED POSITION,
EVEN IF THE HOPPER IS EMPTY.
• ALWAYS USE THE SAFETY PROP TO SUPPORT A RAISED HOPPER OR REAR
DOOR (OTHER THAN DURING DISCHARGING). NEVER WORK UNDER A
RAISED CAB, HOPPER OR REAR DOOR UNLESS THE APPROPRIATE PROP IS IN
THE DEPLOYED POSITION.
• BEFORE OPERATING EITHER THE HOPPER-TIP OR REAR DOOR CONTROLS,
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 MACHINE ON FIRM, LEVEL GROUND, APPLY THE
HANDBRAKE, STOP THE ENGINE, REMOVE THE IGNITION KEY.
• ALWAYS WEAR THE APPROPRIATE PERSONAL PROTECTION EQUIPMENT
(PPE) WHEN OPERATING OR WORKING ON THE MACHINE.
• BEFORE STARTING THE ENGINES ENSURE THAT ALL CONTROLS ARE
SWITCHED OFF AND THAT THE MACHINE IS IN NEUTRAL.
• KEEP LONG HAIR, LOOSE CLOTHING AND HANDS AWAY FROM MOVING
PARTS.
• HIGH PRESSURE WATER CAN BE HAZARDOUS, ALWAYS WEAR SUITABLE
FACE 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 DRIVER’S SEAT SHOULD BE CORRECTLY ADJUSTED AS TO GIVE A GOOD
POSTURE WHEN DRIVING
• THE MIRRORS SHOULD BE ADJUSTED SO THE DRIVER HAS A GOOD
ALL-ROUND VIEW OF THE MACHINE SIDES AND SWEEPING EQUIPMENT.
• WHEN OPERATING THE MACHINE IN ANY MODE ALWAYS BE AWARE OF
OBJECTS AND PEOPLE IN THE IMMEDIATE VICINITY, ESPECIALLY AT THE
REAR OF THE MACHINE WHEN REVERSING.
• WHATEVER THE SITUATION, REMEMBER THAT THE RULES OF TRAFFIC AND
ROAD SAFETY MUST BE OBSERVED.
• WHILE OPERATING THIS MACHINE THE SAFETY AND WELL BEING OF OTHER
PEOPLE ARE THE SOLE RESPONSIBILITY OF THE OPERATOR.
• NEVER RIDE ON ANY PART OF THE MACHINE OTHER THAN IN THE DRIVERS
CAB.
The universal safety symbol along with red text is used throughout this handbook and when encountered the related information must be
adhered to.
Refers to important information.
Identifies cautionary information and specific procedures when required.
Refers to visual examination to confirm the condition or status of a specific item
OTHER SYMBOLS NOT SHOWN HERE MAY BE USED THROUGHOUT THIS HANDBOOK. WHEN ENCOUNTERED, THEY MUST BE OBSERVED.
REMEMBER, FAILURE TO COMPLY CAN RESULT IN SERIOUS INJURY.

Part No. SCAZ038022 2.4.1 2E&OE
Operating Instructions - Unidrive Truckmounted Road Sweeper
HAZARD AWARENESS
All operators and workshop personnel should be aware of the physical and biological risks that are inherent in the operation of a road sweeper. The
risk falls into two main categories as follows:
• Risks represented by the sweeper and its various systems.
• Risks represented by the sweeper's operating environment.
Both have the potential for exposure to a variety of hazards, ranging from hot surfaces to infectious diseases, that can occur during day-to-day
operation, while carrying out adjustments or when involved with the general maintenance and servicing activities on the vehicle.
Typical vehicle-related hazards are:
• Exposure to hot surfaces and sharp edges.
•Exposuretomovingparts.
• Exposure to various fluids (including some hot and/or pressurised).
• Exposure to surface contamination resulting from general operating conditions.
Typical environmental hazards are:
• Exposure to sharp objects (e.g. broken glass, discarded hypodermic syringes) while operating or working on the vehicle.
• Exposure to various infectious diseases (e.g. Legionnaire's, Weil's, Hepatitis, Tetanus) while operating or working on the vehicle.
SAFETY PRECAUTIONS
When using external equipment such as the high-pressure water lance, or when dealing with potentially hazardous situations while sweeping (e.g.
unblocking a suction nozzle), always wear the appropriate Personal Protection Equipment (PPE) and exercise extreme caution if required to handle
any of the material being swept.
Before working on the vehicle, subject it to a thorough steam cleaning or high-pressure hot water wash using appropriate detergents etc.
Even after taking all reasonable steps to reduce the risk from the hazards described, always wear the appropriate Personal Protection Equipment
(PPE) when carrying out sweeping duties or when working on the vehicle. This includes:
Safety Gloves (including where necessary cut-resistant knitted Kevlar).
Safety boots or shoes with protective soles and toecaps.
Eye/Face protection (including where necessary full-face mask with under-chin lip).
Earplugs or Ear defenders as appropriate.

Part No. SCAZ038022 2.4.1 3E&OE
Operating Instructions - Unidrive Truckmounted Road Sweeper
OPERATING ADVICE
Please remember, the information provided in this handbook is designed to ensure that the Scarab sweeper operates both safely and efficiently.
The design of this machine is for the removal of spoil on traffic areas, also litter collection, using the wander hose.
A poorly maintained machine will become unreliable, inefficient and potentially dangerous. Always observe the recommended maintenance and
safety related advice provided.
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 screen, wearing out the fan blades on its way back to the
environment behind you.
Operators should be trained in the following elements:
• Health & safety observations/notices
• Transit driving
• In-cab & external controls
• Hopper safety/cab prop use
• Brush setting
• Nozzle flap adjustment
• Correct sweeping operations
• Low & high pressure water systems
• Load discharge (tipping)
• Daily, weekly maintenance schedules
• End of day cleaning, ie: suction fan, fan screen & Machine body
Operator training can be provided by Scarab Sweepers upon request.
The LCD monitor’s USB connection is for uploading/downloading information (ONLY) and must not be used for any other purpose.
It is the responsibility of employers to carry out they own risk assessment for the machine, operators or other persons using or affected by the
machine and equipment.
Various safety, hazard and user information labels are fixed to the machine. These must be observed.
Only personnel qualified in the relevant disciplines should be allowed to work on any of the machines HYDRAULIC SYSTEM.
For information regarding vehicle operation and maintenance, refer to the chassis manufactures handbook.

Part No. SCAZ038022 2.4.1 4E&OE
Operating Instructions - Unidrive Truckmounted Road Sweeper
SAFETY PROPS
Ensure the prop is
correctly positioned
within the ratchet rack
AUTO RATCHET PROP
DOOR SAFETY PROP
When inserting the
door prop, ensure it
is correctly positioned
in the locating slot

Part No. SCAZ038022 2.4.1 5E&OE
Operating Instructions - Unidrive Truckmounted Road Sweeper
THE CANbus SYSTEM
The CANbus system comprises two control panels (main and auxiliary) an LCD monitor and a number of control nodes. 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.
Switches: The various types of switch function are grouped in two ways. Firstly they are colour coded as follows:
AMBER = Electrical functions such as lighting.
RED = Critical functions (e.g. Engage Hydrostatic Drive).
GREEN = Sweeping functions.
BLUE = Water Spray functions.
Each switch illuminates a function-related symbol on the LCD monitor (only installed equipment will be displayed). Each symbol is greyed-out until
its switch is activated. When a switch is activated the appropriate symbol will illuminate according to system status as illustrated.
Not selected
Pre-selected
Water pre-selected
Brush & water
pre-selected
Equipment working
Not selected
Pre-selected
Additional water
selected
Nozzle & additional
Water pre-selected
Equipment working
Centre blue when
additional water active
Nozzle tilt selected
Not selected
Pre-selected
Equipment working
WIDESWEEP WATER ON
SIDE BRUSH AND
WIDESWEEP WATER ON
WORKLIGHT ON
SUCTION FAN ON (2000RPM)
SHOWN IN THE WORKING
POSITION

Part No. SCAZ038022 2.4.1 6E&OE
Operating Instructions - Unidrive Truckmounted Road Sweeper
MAIN CONTROL PANEL SWITCH FUNCTIONS
Switch functions are described from Left to Right and Top to Bottom.
F1 / F2 - Press to activate special options.
SYSTEM-START - Press to start/stop the system and engage/disengage hydrostatic drive.
BRUSH SPEED (-) - Press to decrease brush speed.
BRUSH SPEED (+) - Press to increase brush speed.
LEFT/RIGHT SIDE BRUSH - Press to start the side-brush.
LEFT/RIGHT SUCTION NOZZLE RAISE/LOWER - Press to lower the suction nozzle.
WIDESWEEP BRUSH - Press to start the widesweep brush.
LEFT/RIGHT WORK-LIGHT - Press to turn ON/OFF.
LEFT/RIGHT SIDE BRUSH/NOZZLE WATER - Press to start the side-brush and suction nozzle
dust-suppression.
WIDESWEEP WATER - Press to start the dust-suppression spray for the widesweep brush.
INCREASE/REDUCE ENGINE SPEED - Press and hold down to reduce/increase the speed of the vehicles engine. A single press of the either
switch will adjust engine speed by 50 RPM. Current engine speed is displayed along the top of the LCD monitor.
LEFT/RIGHT SUCTION NOZZLE - ADDITIONAL WATER *Press to start the additional water jets for the suction nozzle.
Brush remains at last chosen speed until
reset

Part No. SCAZ038022 2.4.1 7E&OE
Operating Instructions - Unidrive Truckmounted Road Sweeper
Auxiliary control panel switch functions
HIGH-PRESSURE WATER PUMP (Option) - Press to start.
SUCTION FAN - Press to start the Suction Fan (approximately 2000 rpm).
CRUISE CONTROL - With the accelerator pedal depressed to the desired speed, press to activate
cruise control.
NOZZLE TILT (LOCKING MODE) - Press to tilt the suction nozzle for larger items.
SUCTION FAN ‘BOOST’ - With the Suction Fan ON, press to activate the fan boost mode. This
increases fan speed to approx. 2200 rpm.
FAVOURITE SETTING - Press to memorise your preferred sweeping set-up. Hold the switch down
until a ‘beep’ sounds. Thereafter, whenever the switch is pressed at system start-up, the
memorised configuration will be automatically pre-selected/restarted. Repeat to over-ride with a
new configuration.
MULTI-FUNCTION LEVER- ON (deploys all selected sweeping equipment). To stop and raise all
sweeping equipment, return the lever to the OFF position.
In the ON position the lever can be used to control the side brushe(s) and suction nozzle(s). These
additional positions i.e. Left, Right and Back, return to the central position when released.
The brush and nozzle functions are controlled as follows:
ON LEFT HAND DRIVE VEHICLES
Move the lever to the left to swing OUT, and to the right to swing IN the side brush(es).
On machines fitted with variable extend and retraction, move the lever momentarily in the desired direction to ‘nudge’ the brush(es).
ON RIGHT HAND DRIVE VEHICLES
Move the lever to the right to swing OUT, and to the left to swing IN the side brush(es).
On machines fitted with variable extend and retraction, move the lever momentarily in the desired direction to ‘nudge’ the brush(es).
NOZZLE-TILT FUNCTION
Move the lever back to momentarily tilt the suction nozzle or close it from TILT OPEN position.
On machines with variable nozzle-tilt, move the lever back to ‘nudge’ the suction nozzle DOWN from the TILT OPEN position.
ON
OFF
SIDE BRUSH SIDE BRUSH
TILT
NOZZLE
MULTI-FUNCTION
LEVER

Part No. SCAZ038022 2.4.1 8E&OE
Operating Instructions - Unidrive Truckmounted Road Sweeper
REMOTE-CONTROL SWITCH BOX FUNCTIONS
The hopper Raise/Lower and rear door Open/Close switches are located in the remote
control box. This is stowed in the cab, between the driver’s seat and door and is connected
to a socket via a coiled lead.
In the interest of health and safety and to avoid possible damage to the sweeper or
adjacent structures, it is essential that the remote hopper/door controls are not
activated from within the cab. always use these controls outside of the vehicle from
a vantage point that affords a good view of the sweeper and its immediate
surroundings.
HOPPER RAISE - Press and hold down to raise the hopper.
The hopper prop must always be used when the hopper is in the raised position.
failure to do could result in serious injury.
HOPPER LOWER - Press and hold down to lower the hopper.
REAR DOOR OPEN - Press and hold down until the door is Fully open (at approximately
90° to the rear face of the hopper).
The door prop must always be used when working under a raised rear door.
Ensure that the suction fan is OFF. The door cannot open while the fan is running due
to the low pressure created within the hopper.
REAR DOOR CLOSE - Press and hold down until the door is fully closed and the latching
cycle has finished.
OPTION
SAFETY INTERLOCK
This switch must be
pressed in and held before
any of the control
switches are operated.

Part No. SCAZ038022 2.4.1 9E&OE
Operating Instructions - Unidrive Truckmounted Road Sweeper
THE LCD MONITOR
The sweeping monitor displays information on the current status of the sweeper while it is in sweep mode, by indicating which items of equipment
are active, plus other relevant information ie: fluid levels, fan speed and temperatures, it also alerts the user to any warnings by means of appropriate
flashing symbols and, when appropriate, a warning buzzer. For warnings identified by , stop and investigate the cause. The accompanying
illustration shows the range of information/alert symbols that can be displayed, however it should be noted that warning symbols (**) only illuminate
when a specific condition occurs.
N/MIN
N/MIN
!
00.00 0
F1
F1 F2 F2
+
SUCTION FAN
ONOFF BOOST
HIGH PRESSURE WATER
ON NO WATER
BUSH SPEED
FAST SLOW
LOW HYDRAULIC OIL LEVEL**
ASIGN NODE**
SERVICE REMINDER**
CRUISE CONTROL ACTIVE
HYDRAULIC OIL TEMPERATURE WARNING**
HOPPER OVERLOAD
WARNING ** (OPTION)
FAULT ACTIVE**
HOPPER RAISED**
LOW WATER LEVEL**
(DUST SUPPRESSOR SYSTEM)
ENGINE SPEED
TIME
OPTION
OPTION
WANDER HOSE ACTIVE
M
DRIVE MODES
MANUAL CRAWLER
!
NODE Software Error !
[phone]
i
FLASHES ACROSS SCREEN
WHEN NODE SOFTWARE
IS INCOMPATIBLE
REDUCTION GEARBOX ONLY
SWEEP MODE ‘ON’
FAN SPEED INDICATOR
2000 RPM

Part No. SCAZ038022 2.4.1 10 E&OE
Operating Instructions - Unidrive Truckmounted Road Sweeper
ADDITIONAL CONTROLS & INSTRUMENTS
CONTROLS FOR OVERHEAD WANDER BOOM OPTION - These are mounted just above the wander
boom handle and consist of two buttons for selecting fan extra-boost speed (3rd Speed) of approx. 2500
rpm and/or the low-pressure dust suppression water supply. Engine speed will automatically increase
to 1800 rpm when fan 3rd Speed is selected.
Push button in to activated (button locks- in). Turn to release. (direction of arrows)
BRUSH PRESSURE
Do not exceed a pressure of 2.5 bar when adjusting brush pressure
settings. Failure to comply will result in drastically reduced brush life.
(1)- AIR-PRESSURE REGULATOR - Used to adjust the amount of
up/down-thrust applied to the brush(es) ¤.
(2)- AIR-PRESSURE GAUGE - Indicates the amount of pressure being applied
to the brush(es) ¤.
(3)- WIDESWEEP SWITCH - Turns function ON/OFF.
(4)- SIDE BRUSH SWITCH - Turns function ON/OFF.
¤ This function is only effective while the relevant brushes are fully deployed.
SIDE BRUSH CONTROLS WIDESWEEP CONTROLS
MOUNTED ON SUBFRAME
MOUNTED IN CAB
12
3 4
1
2

Part No. SCAZ038022 2.4.1 11 E&OE
Operating Instructions - Unidrive Truckmounted Road Sweeper
OPERATING IN SWEEP MODE
REFER TO THE HEALTH & SAFETY INFORMATION ON Page 1
REDUCING NOISE LEVELS & FUEL CONSUMPTION: Although it is important to always operate within the engine’s optimum speed range, there are
times when it is possible to reduce engine speed to the lower end of this, thereby reducing noise levels. This is most beneficial when sweeping at
night, or in areas sensitive to noise pollution. Sweeping at reduced engine speeds can be achieved most satisfactorily when sweeping light or
sparsely distributed materials. Experience will enable the operator to vary engine speed, according to sweeping conditions, without affecting
sweeping performance.
It should be noted that the operator also benefits from reduced noise levels within the cab and that any reduction in engine speed, also results in a
corresponding reduction in fuel consumption.
Sweeping
Engine ON. Neutral gear selected. Parking brake ON.
1. Switch on the hazard warning beacons.
2. Press the Sweep Mode switch. the engine will default to 1100rpm, and a number of symbols, representing the installed sweeping
equipment will appear superimposed on the truck graphic, displayed on the LCD monitor.
3. Switch on suction fan (approx. 2000 rpm) or Boost (approx. 2200 rpm) as required. If Boost is selected (Refer to Page 12) remember
that increased engine speed might be necessary. Fan speed can be confirmed by referring to the LCD screen.
4. Select the desired configuration of sweeping equipment and water sprays if required, either manually or by pressing the Favourite Settings
switch to recall your preferred arrangement. Switch on work-lights if required.
If considered appropriate reduce/increase engine speed to suit the prevailing sweeping conditions, by means of the engine speed controls
on the main panel. Engine speed can only be adjusted between its minimum effective speed for the situation and the active preset default speed.
Be aware that too much reduction of engine speed can adversely affect suction performance.
5. Move the Multi-Function Lever (located on the auxiliary control panel) to the ON position to start and deploy the pre-selected
sweeping equipment.
To stop and stow the sweep gear, return the lever to OFF. The sweeping equipment will raise to the stowed position and all water
spray jets will stop (this will also occur automatically as soon as REVERSE is engaged, reverting to the original configuration as soon
as REVERSE is disengaged).
ON
OFF

Part No. SCAZ038022 2.4.1 12 E&OE
Operating Instructions - Unidrive Truckmounted Road Sweeper
6. Operate the Multi-Function Lever to swing the side brushes OUT. The multi-function lever can also be used to control
nozzle-tilt (refer to Page 9 for operating details).
The multi-function switch will automatically return to the central position from the side brush and nozzle control positions.
7. Select a forward gear ratio best suited to the prevailing sweeping conditions and commence sweeping.
Whatever the situation, remember that the rules of traffic and road safety must be observed.
Suction fan boost setting
When required, a boost setting is available for the suction fan. This increases fan speed by approximately 10% and is used when sweeping heavy
material. To operate the fan at the Boost setting, carry out the following procedure:
1. Press the suction fan BOOST switch and refer to the LCD monitor to confirm fan speed.
2. Adjust engine speed as necessary, by means of the controls on the main panel, until the fan speed is approximately 2200 rpm using
the lowest engine speed to achieve this.
Exiting sweep mode
1. Press the suction fan switch to stop the fan.
2. Move the Multi-Function Switch (located on the lower extension of the auxiliary control panel) to the ‘Sweep Master Switch OFF
position. All active sweep systems will stop and retract.
If the Multi-Function Switch is not returned to the OFF position at this point, the sweeping equipment will not function upon any
subsequent resumption of Sweep Mode until it has been first moved to the OFF position and then returned to the ON position.
3. Press the System Start/Stop switch . The sweeping equipment symbols displayed on the LCD monitor truck graphic will extinguish, to
show that Sweep Mode is OFF.
ON
SIDE BRUSH SIDE BRUSH
NOZZLE
TILT
ON
OFF

Part No. SCAZ038022 2.4.1 13 E&OE
Operating Instructions - Unidrive Truckmounted Road Sweeper
Engaging the reduction gearbox (scarab option only)
On vehicles fitted with a Scarab reduction gearbox, road speed of approximately 80% can be achieved when selected.
1. Vehicle engine Running. Parking brake ON, Neutral gear selected.
2. Depress the clutch and press the switch on the main control panel. The symbol on the LCD screen will change to the symbol. The
vehicle is now in reduction drive mode.
If the reduction gearbox fails to engage the symbol will flash, Press the again to restore normal drive. Move the vehicle slightly forward
and repeat the forgone procedure.
3. Select the appropriate sweeping equipment. Refer to Page 11, and the best suited gear ratio for the prevailing sweeping conditions.
Commence sweeping.
Disengaging the reduction gearbox (scarab option only)
1. With all sweeping equipment OFF and stowed, fan OFF. Vehicle Stopped. Parking brake On. Neutral selected.
2. Depress the clutch and press the on the main control panel. The symbol On the LCD screen will change to the symbol. The vehicle
is now in normal drive mode.
If the reduction gearbox fails to engage the symbol will flash, Press the again to restore normal drive. Move the vehicle slightly forward
and repeat the forgone procedure.
M
M
M

Part No. SCAZ038022 2.4.1 14 E&OE
Operating Instructions - Unidrive Truckmounted Road Sweeper
DISCHARGING THE HOPPER (TIPPING)
In the interest of health and safety and to avoid possible damage to the sweeper or adjacent structures, it is essential that the remote
hopper/door controls are not activated from within the cab. Always use these controls outside of the vehicle from a vantage point that affords
a good view of the sweeper and its immediate surroundings.
1. With the vehicle correctly positioned in the discharge area. Proceed as follows:
Before raising the hopper, ensure that the vehicle is on firm, level ground and that there are no overhead obstructions.
2. Engine running. Handbrake ON. Vehicle in Neutral. Multi-function lever OFF.
3. Select Hydrostatic drive. Refer to Page 11.
The safety interlock must be pressed in conjunction with the following buttons.
4. Open the rear door fully.
5. Raise the hopper fully.
6. With the load fully discharge, stow the hopper prop and lower the hopper completely.
Before closing the door, ensure that the door seal, and mating faces on the hopper, are free from any foreign matter that might damage the
seal or adversely affect the sealing function.
The door prop must always be used when working under a raised rear door.
7. Close the rear door making sure the locking mechanism has fully engaged.
8. Select Manual drive: Refer to Page 11, and move vehicle clear of discharge area.
The hopper prop must always be used when working beneath a raise hopper. failure to do so could result in serious injury.
ON
OFF

Part No. SCAZ038022 2.4.1 15 E&OE
Operating Instructions - Unidrive Truckmounted Road Sweeper
USING THE AUXILIARY HYDRAULIC PUMP
In the event of hydraulic system failure, an auxiliary (manually operated) hydraulic pump is fitted, to
enable the rear door and hopper to be operated. This is located on the left hand side of the vehicle,
adjacent to the hopper suction spigot. The pump handle is stowed in the cab.
It should be noted that it will require a substantial number of pumping cycles to complete the
following operations. The assistance of a second person is highly recommended.
1. Engine OFF. Handbrake ON.
2. Turn ON the ignition (do not start the engine). Select sweep mode (Main Panel).
3. Insert the pump handle.
4. Pressing the required function button on the Remote control and hold, while operating the
pump handle.
Never work under a raised hopper or rear door unless the appropriate prop is in the deployed
position.