Clarke FOCUS L17 User manual

Form No. 9097066000 - 12/2007

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2Operator’s Manual - FOCUS®II L17 - S20 - L20 - L20 Cyl. - BOOST®L20
TABLE OF CONTENTS
Operator’s Manual.....................................................................................................................................................................................1
OPERATOR SAFETY INSTRUCTIONS .....................................................................................................................................................3
INTRODUCTION.........................................................................................................................................................................................5
HOW TO KEEP THIS MANUAL.............................................................................................................................................................5
IDENTIFICATION DATA.........................................................................................................................................................................5
CHANGES AND IMPROVEMENTS ......................................................................................................................................................5
UNPACKING..........................................................................................................................................................................................5
TECHNICAL DATA .....................................................................................................................................................................................6
MACHINE TRANSPORT PROCEDURES..................................................................................................................................................7
SYMBOLS SHOWN ON THE MACHINE....................................................................................................................................................7
MACHINE DESCRIPTION..........................................................................................................................................................................8
OUTER AND INNER STRUCTURE ......................................................................................................................................................8
CONTROL PANEL...............................................................................................................................................................................10
BATTERY CHARGER DATA INSPECTION WINDOW .......................................................................................................................10
USE...........................................................................................................................................................................................................11
BATTERY CHECK/SETTING ON A NEW MACHINE..........................................................................................................................11
BATTERY INSTALLATION AND BATTERY TYPE SETTING (WET OR AGM) ...................................................................................12
BEFORE START-UP............................................................................................................................................................................13
MACHINE STARTAND STOP.............................................................................................................................................................18
MACHINE OPERATION (SCRUBBING/DRYING)...............................................................................................................................19
TANK EMPTYING................................................................................................................................................................................21
AFTER USING THE MACHINE...........................................................................................................................................................22
MACHINE LONG INACTIVITY............................................................................................................................................................22
FIRST PERIOD OF USE.....................................................................................................................................................................22
MAINTENANCE........................................................................................................................................................................................23
SCHEDULED MAINTENANCE TABLE ...............................................................................................................................................23
SQUEEGEE CLEANING.....................................................................................................................................................................24
SQUEEGEE BLADE CHECK AND REPLACEMENT..........................................................................................................................25
BRUSH/PAD CLEANING.....................................................................................................................................................................26
VACUUM SYSTEM MOTOR FILTER CLEANING...............................................................................................................................26
SOLUTION/CLEAN WATER FILTER CLEANING ...............................................................................................................................26
TANK AND VACUUM GRID WITH FLOAT CLEANING,AND COVER GASKET CHECK...................................................................27
DETERGENT TANK CLEANING.........................................................................................................................................................28
BRUSH/PAD-HOLDER/CYLINDRICAL BRUSH DECK DISASSEMBLY/ASSEMBLY ........................................................................29
BATTERY CHARGING........................................................................................................................................................................30
MACHINE WORKING HOUR CHECK ...............................................................................................................................................32
FUSE CHECK/REPLACEMENT..........................................................................................................................................................32
ACCESSORIES/OPTIONS FOR FOCUS II..............................................................................................................................................33
ACCESSORIES/OPTIONS..................................................................................................................................................................33
TROUBLESHOOTING..............................................................................................................................................................................33
SCRAPPING........................................................................................................................................................................................33
Parts List..................................................................................................................................................................................................99

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Operator’s Manual - FOCUS®II L17 - S20 - L20 - L20 Cyl. - BOOST®L20 3
OPERATOR SAFETY INSTRUCTIONS
DANGER! It indicates a dangerous situation with risk of death for the operator.
WARNING! It indicates a potential risk of injury for people or damage to objects.
CAUTION! It indicates a caution related to important or useful functions.
Pay careful attention to the paragraphs marked by this symbol.
DANGER! Disconnect the batteries before performing any maintenance/repair procedure.
DANGER! This machine must be used by properly trained and authorized personnel only. Children or disabled
people cannot use this machine.
DANGER! Keep the batteries away from sparks, flames and incandescent material. During normal operation,
explosive gases are released.
DANGER! Do not wear jewelry when working near electrical components.
DANGER! Do not work under the lifted machine without supporting it with safety stands.
DANGER! Do not operate the machine near toxic, dangerous, flammable and/or explosive powders, liquids or
vapors.
DANGER! Battery charging produces highly explosive hydrogen gas. Keep the tank assembly open during battery
charging and perform this procedure in well-ventilated areas and away from bare flames.
WARNING! Before using the battery charger, ensure that frequency and voltage values, indicated on the machine
serial number plate, match the electrical mains voltage.
WARNING! Do not pull or carry the machine by the battery charger cable and never use the battery charger cable as
a handle. Do not close a door on the battery charger cable, or pull the battery charger cable around sharp
edges or corners. Do not run the machine on the battery charger cable. Keep the battery charger cable
away from heated surfaces.
WARNING! Do not charge the batteries if the battery charger cable or plug is damaged. If the machine is not working
as it should, has been damaged, left outdoors or dropped into water, return it to the Service Center.
WARNING! To reduce the risk of fire, electric shock, or injury, do not leave the machine unattended when it is
plugged in. Before performing any maintenance procedure, disconnect the battery charger cable from
the electrical mains.
WARNING! Do not smoke while charging the batteries.
WARNING! Always protect the machine against the sun, rain and bad weather, both under operation and inactivity
condition. Store the machine indoors.
WARNING! Do not allow to be used as a toy. Close attention is necessary when used near children.
WARNING! Use only as shown in this Manual. Use only Clarke's recommended accessories.
WARNING! Take all necessary precautions to prevent hair, jewelry and loose clothes from being caught by the
machine moving parts.
WARNING! Do not leave the machine unattended without being sure that it cannot move independently.
WARNING! Do not use the machine on slopes with a gradient exceeding the specifications.
WARNING! Do not use the machine in particularly dusty areas.
WARNING! While using this machine, take care not to cause harm to people or damage to objects.
WARNING! Do not bump into shelves or scaffoldings, especially where there is a risk of falling objects.
WARNING! Do not put any can containing fluids on the machine.
WARNING! The machine operating temperature must be between +32°F and +104°F (0°C and +40°C).

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4Operator’s Manual - FOCUS®II L17 - S20 - L20 - L20 Cyl. - BOOST®L20
WARNING! The machine storage temperature must be between +32°F and +104°F (0°C and +40°C).
WARNING! The humidity must be between 30% and 95%.
WARNING! Do not use the machine as a means of transport.
WARNING! Do not use the machine on slopes with an inclination higher than 2%.
WARNING! Do not allow the brushes to operate while the machine is stationary to avoid damaging the floor.
WARNING! In case of fire, use a powder fire extinguisher, not a water one.
WARNING! Do not tamper with the machine safety guards and follow the routine maintenance instructions
scrupulously.
WARNING! Do not allow any object to enter into the openings. Do not use the machine if the openings are clogged.
Always keep the openings free from dust, hairs and any other foreign material which could reduce the air
flow.
WARNING! Do not remove or modify the plates affixed to the machine.
WARNING! If the machine is used according to the instructions, the vibrations are not dangerous. The machine
vibration level is less than 98.42 in/s2(2.5 m/s2) (98/37/EEC - EN 1033/1995).
WARNING! This machine cannot be used on roads or public streets.
WARNING! Pay attention during machine transportation when temperature is below freezing point. The water in the
recovery tank or in the hoses could freeze and seriously damage the machine.
WARNING! Use the brushes and pads supplied with the machine and those specified in the Operator's Manual.
Using other brushes or pads could reduce safety.
WARNING! In case of machine malfunctions, ensure that these are not due to lack of maintenance. If necessary,
request assistance from the authorized personnel or from an authorized Service Center.
WARNING! If parts must be replaced, require ORIGINAL spare parts from an authorized Dealer or Retailer.
WARNING! To ensure machine proper and safe operation, the scheduled maintenance shown in the relevant chapter
of this Manual, must be performed by the authorized personnel or by an authorized Service Center.
WARNING! Carefully read all the instructions before performing any maintenance/repair procedure.
WARNING! Do not wash the machine with direct or pressurized water jets, or with corrosive substances.
WARNING! The machine must be disposed of properly, because of the presence of toxic-harmful materials
(batteries, etc.), which are subject to standards that require disposal in special centers (see Scrapping
chapter).

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Operator’s Manual - FOCUS®II L17 - S20 - L20 - L20 Cyl. - BOOST®L20 5
INTRODUCTION
FOCUS II model of Clarke scrubber-dryer ensures a highly effective floor cleaning performance.
FOCUS II L17 model is equipped with a single rotary brush to clean an area of 17.0 in (430 mm) in width.
FOCUS II S20 and FOCUS II L20 model is equipped with a single rotary brush to clean an area of 20 in (508 mm) in width.
FOCUS II L20 Cyl. model is equipped with two cylindrical brushes to clean an area of 20 in (508 mm) in width.
FOCUS II BOOST L20 model is equipped with a single orbital rectangular pad to clean an area of 20 in (508 mm) in width
The rear squeegee performs the floor cleaning and the vacuum system recovers the washing water in a single pass.
HOW TO KEEP THIS MANUAL
The Operator's Manual must be kept near the machine, inside an adequate case, away from liquids and other substances that can
cause damage to it.
IDENTIFICATION DATA
The machine model and the serial number are marked on the plate. (AI. Fig. 2 - page 9).
The machine production year is indicated by the first two figures of the machine serial number.
This information is useful when requiring machine spare parts. Use the following table to write down the machine identification data for
any further reference.
MACHINE model ...............................................................................
MACHINE Serial Number ..................................................................
CHANGES AND IMPROVEMENTS
Clarke constantly improves its products and reserves the right to make changes and improvements at its discretion without being
obliged to apply such benefits to the machines previously sold.
Any change and/or addition of accessories must be approved and performed by Clarke.
UNPACKING
To unpack the machine carefully follow the instructions on the packing.
Upon delivery carefully check that the machine and its packing have not been damaged during transportation. In case of visible
damages, keep the packing and have it checked by the Carrier that delivered it. Call the Carrier immediately to fill in a damage claim.
Please check that the following items have been supplied with the machine:
Technical documents:
Scrubber-dryer Instructions for Use Manual
Electronic battery charger Manual
No. 2 lamellar fuses
1. •
•
2.

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6Operator’s Manual - FOCUS®II L17 - S20 - L20 - L20 Cyl. - BOOST®L20
TECHNICAL DATA
Model FOCUS II L17 FOCUS II S20 FOCUS II L20 FOCUS II L20 Cyl. FOCUS II BOOST®L20
Working Voltage 24 V DC
Standard Batteries (2) 12 V - 130 Ah@20hr Wet
Optional Batteries (2) 12V 114 Ah@20hr ratingAGM
Drive System Motor 0.3 hp (200 W) — 0.3 hp (200 W)
Drive Speed (variable) 0 to 3.5 mph
(0 to 5.6 km/h) Determined by brush rotation 0 to 3.5 mph (0 to 5.6 km/h)
Battery Protection System Low Voltage Cut-Off of Brush and Solution
Vacuum Motor Power 0.5 hp, 2 stages, tangential discharge
Vacuum Capacity 41.5 in H2O (1.055 mm H2O)
Solution & Rec. Tanks 14.5 US gal (55 liters)
Solution Flow (min/max) 0 - 0.63 gal/min
(0 - 2.4 liter/min) 0 - 0.3 gal/min (0 - 0.75 liter/min)
Squeegee Width 29.9 in. (760 mm)
Cleaning Width 17 in. (430 mm) 20 in. (508 mm)
Brush Motor Power 0.7 hp (480 W) (2) @ 0.4 hp (300 W) ea 0.75 hp (560 W)
Cylindrical Brush Size — — — 4.3 x 19.1 in.
(110 x 485 mm)
BOOST®Pad Size — — — — 14 x 20 in.
(457 x 508 mm)
Brush Speed 153 rpm 570 rpm 2250 rpm
Brush Pressure 45 and 90 lbs (20 and 41 kg) 58.4 lbs (26.5 kg) 40 and 75 lbs
(18 and 34 kg)
Front Wheel Pressure
on the floor 116 psi (0.8 N/mm2)
Rear Wheel Pressure
on the floor 884.7 psi (6.1 N/mm2) 406.1 psi (2.8 N/m m2) 884.7 psi (6.1 N/mm2)
On-Board Battery Charger Standard
Gradeability 2%
Machine Length 52.1 in. (1.323 mm) 49.3 in. (1,253 mm) 51 in. (1.295 mm)
Machine Width without
Squeegee 21.3 in. (541 mm) 22.7 in. (575.5 mm) 20.8 in. (528 mm)
Machine Height 42.8 in. (1.088 mm)
Weight w/o Batteries and with
empty tanks 209.4 lbs (95 kg) 191.8 lbs (87 kg) 209.4 lbs (95 kg) 231.5 lbs (105 kg) 203 lbs (92 kg)
Weight with batteries and full
tanks 531.3 lbs (241 kg) 515.9 lbs (234 kg) 531.3 lbs (241 kg) 553.4 lbs (251 kg) 525 lbs (238 kg)
Sound level 65.8 dB(A)
Battery compartment size
(width x length x height) 13.8 x 13.8 x 11.8 in. (350 x 350 x 300 mm)

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Operator’s Manual - FOCUS®II L17 - S20 - L20 - L20 Cyl. - BOOST®L20 7
MACHINE TRANSPORT PROCEDURES
How to load and unload the machine from a van or a
truck
WARNING!
This machine is heavy. Machine transport must be
performed by qualified personnel only. Machine
transport on steep ramps must be performed by two
well-trained operators only. Always move it slowly.
Do not turn the machine on slopes. Do not leave the
machine unattended on slopes. Loading ramp width
must not be less than 40 in (1 m).
Check that the loading ramp is not longer than 8 feet (2.5
m) and not wider than 40 in (1 m). Its thickness must be
adequate to support the machine and operators’ weight.
Check that the ramp is dry and clean.
Position the ramp properly.
Before loading the machine, remove the squeegee assembly
and the brush/pad-holder. Before loading the machine,
empty both the solution and the recovery water tank.
How to Fasten the Machine Inside the Vehicle
Clarke recommends to fasten the machine with belts during
transportation.
1.
2.
3.
4.
5.
Figure 1
SYMBOLS SHOWN ON THE MACHINE
WARNING!
Carefully read all instructions before performing any procedure.
WARNING!
Do not wash the machine with direct or pressurized water jets.
WARNING!
Do not use the machine on slopes exceeding the specifications.

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8Operator’s Manual - FOCUS®II L17 - S20 - L20 - L20 Cyl. - BOOST®L20
MACHINE DESCRIPTION
OUTER AND INNER STRUCTURE
(See Fig. 2)
Control panel
Handlebar
Brush/forward gear switch (*). Brush switch (***)
Speed adjuster (*)
Battery charger data inspection window
Battery charger cable
Battery charger cable holder
Solution/clean water rear filler neck
Reverse gear switch
Squeegee lifting/lowering lever
Deck lifting/lowering pedal
K1. Deck lifting
K2. Deck lowering
K3. Extra pressure activation (optional) (***)
Battery connector (red). This connector also works as
EMERGENCY switch, to stop immediately all functions.
Rear steering wheel
Front wheels on fixed axle. Driving wheels (*)
Squeegee vacuum hose
Recovery water drain hose
Solution/clean water drain and level check hose
Deck with one brush/pad-holder
Deck with two cylindrical brushes
Brush/pad-holder
Solution/clean water tank
Recovery water tank
Recovery water tank cover
Can holder
Solenoid valve
Squeegee
Squeegee knobs
Squeegee balance adjusting knob
Machine straight forward movement adjusting pin
Machine forward speed adjusting pin (***)
Recovery water tank cover (open)
Tank cover gasket
Cover movable retaining plate
Cover fixed retaining plate (do not remove!)
Serial number plate/technical data
Squeegee vacuum hose cleaning hole
Vacuum grid with automatic shut-off float
Solution/clean water front filler neck
Grid filter (optional)
Compensation hole
Recovery water tank (open)
Recovery water drain hose plug
Tank safety cable
Vacuum system motor cover
Vacuum system motor sound-deadening filter
Detergent tank (**)
Detergent tank filler plug (**)
Detergent tank handle (**)
Detergent feed hose (**)
Detergent pump (**)
Detergent tank - pump connecting hose (**)
Detergent pump holder (**)
Batteries
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
K.
L.
M.
N.
O.
P.
Q.
R.
S.
T.
U.
V.
W.
X.
Y.
Z.
AA.
AB.
AC.
AD.
AE.
AF.
AG.
AH.
AI.
AJ.
AK.
AL.
AM.
AN.
AO.
AP.
AQ.
AR.
AS.
AT.
AU.
AV.
AW.
AX.
AY.
AZ.
BA.
Battery caps
Solution filter
Solution/clean water tap
Reference table for detergent proportioning (**)
Battery connection diagram
(*) Only for FOCUS II L17 - L20 - L20 Cyl. - BOOST L20
(**) Only for machines with Chemical Mixing System (optional)
(***) Only for FOCUS II S20
BB.
BC.
BD.
BE.
BF.

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Operator’s Manual - FOCUS®II L17 - S20 - L20 - L20 Cyl. - BOOST®L20 9
Figure 2

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10 Operator’s Manual - FOCUS®II L17 - S20 - L20 - L20 Cyl. - BOOST®L20
CONTROL PANEL
(See Fig. 3)
Brush/pad-holder and vacuum system switch
Brush/pad-holder and vacuum system switch warning light
Vacuum system switch
Vacuum system switch warning light
Brush/pad-holder release switch
Brush/pad-holder release switch warning light
Detergent flow control knob (optional)
Reverse gear switch
Hour meter (optional)
Ignition key (0 - I)
Battery charge indicator
Charged battery warning light (green)
Semi-discharged battery warning light (yellow)
Discharged battery warning light (red)
Washing water flow control switches
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
K.
L.
M.
N.
O.
Flow increase switch
Flow decrease switch
Washing water flow indicator
Brush/forward gear switch (*). Brush switch (***)
Speed adjuster (*)
(*) Only for FOCUS II L17 - L20 - L20 Cyl. - BOOST L20
(**) Only for machines with Chemical Mixing System (optional)
(***) Only for FOCUS II S20
P.
Q.
R.
S.
T.
Electronic battery charger
Lead (WET) or AGM (GEL) battery selector
Green warning light (ON: the battery charger is on and
batteries are charged)
A.
B.
C.
Yellow warning light (ON: the battery charger is on and
batteries are semi-discharged)
Red warning light (ON: the battery charger is on and it is
charging the batteries)
D.
E.
Figure 4
Figure 3
BATTERY CHARGER DATA INSPECTION WINDOW
(See Fig. 4)

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Operator’s Manual - FOCUS®II L17 - S20 - L20 - L20 Cyl. - BOOST®L20 11
USE
WARNING!
On some points of the machine there are some
adhesive plates indicating:
DANGER
WARNING
CAUTION
CONSULTATION
–
–
–
–
While reading this Manual, the operator must pay particular
attention to the symbols shown on the plates.
Do not cover these plates for any reason and immediately replace
them if damaged.
BATTERY CHECK/SETTING ON A NEW MACHINE
WARNING!
The electric components of the machine can
be seriously damaged if the batteries are either
improperly installed or connected. The batteries
must be installed by qualified personnel only. Set
the function electronic board and the built-in battery
charger according to the type of batteries used (WET
or AGM batteries).
Check the batteries for damage before installation.
Disconnect the battery connector (A, Fig. 5) and the
battery charger plug (I).
Handle the batteries with great care.
Install the battery terminal protection caps supplied
with the machine.
The machine requires two 12 V batteries, connected according to
the diagram (A, Fig. 6).
The machine can be supplied in one of the following modes:
Batteries (WET or AGM) already installed and charged
Check that the batteries are connected to the machine with
the connector (A, Fig. 5).
Insert the ignition key (B) and turn it to "I".
If the green warning light (C) turns on, the batteries are
charged.
If the yellow (D) or red warning light (E) turns on,
the batteries must be charged (see the procedure in
Maintenance chapter).
Without batteries
Buy appropriate batteries (see the Technical Data
paragraph).
For battery choice and installation, apply to qualified battery
Retailers.
Set the machine and the battery charger according to the
type of batteries (WET orAGM), as shown in the next
paragraph.
A)
1.
2.
B)
1.
2.
3.
Figure 5
Figure 6

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12 Operator’s Manual - FOCUS®II L17 - S20 - L20 - L20 Cyl. - BOOST®L20
BATTERY INSTALLATION AND BATTERY TYPE
SETTING (WET OR AGM)
According to the type of batteries (WET orAGM), set the machine
and electronic board of the battery charger as follows:
Machine setting
Turn the ignition key (A, Fig. 7) to “I” and in the very first
seconds of machine operation pay attention to the following:
If the green warning light (B) is flashing, the machine is
set to AGM.
If the red warning light (C) is flashing, the machine is set
to WET.
If the setting is to be changed, perform the following
procedure.
Turn off the machine and turn the ignition key (A) to "0".
Press and hold the switches (D) and (E) at the same time,
then turn the ignition key (80) to "I".
Release the switches (D) and (E) at least 8 seconds after
turning the machine on.
Within 3 seconds, press the switch (E) again for a few
seconds and check that the warning light for the required
setting is flashing (as shown in step 1).
Battery charger setting
Remove the battery charger data inspection window screws
(F).
Remove the inspection window (G).
Turn the battery charger selector (H) to WET position for lead
batteries, or to GEL position for AGM batteries.
Install the inspection window (G) and tighten the screws (F).
Battery installation
Open the cover (I) and check that the recovery water tank (J)
is empty, otherwise empty it with the drain hose (K).
Carefully lift the tank (A, Fig. 8).
Install the batteries (B).
Battery charging
Charge the batteries (see the procedure in Maintenance
chapter).
1.
•
•
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14. Figure 7
Figure 8

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Operator’s Manual - FOCUS®II L17 - S20 - L20 - L20 Cyl. - BOOST®L20 13
BEFORE START-UP
Brush/pad-holder deck or cylindrical brush deck
installation/removal
On the machine it is possible to install/remove either the brush/
pad-holder deck (A, Fig. 9) or the cylindrical brush deck (E).
For deck installation/removal see the procedure in Maintenance
chapter.
Brush/pad-holder installation/removal
According to the kind of cleaning to be performed, the
machine can be equipped either with brushes (B) or pad-
holders (C) with pads (D) together with the appropriate deck.
Insert the ignition key (A, Fig. 10) and turn it to "I".
If equipped, turn the speed adjuster (B) to idle by turning it
counter-clockwise.
Place the brushes (B, Fig. 9) or the pad-holder (C) under the
17 in / 20 in (430 mm / 530 mm) deck (A).
Lower the deck on the brushes/pad-holders by pressing the
pedal (C, Fig. 10).
Turn the ignition key (A) to "I".
Press the brush/pad-holder switch (D).
Press one of the switches (E) to engage the brush/pad-
holder, then release it. If necessary, repeat the procedure
until the brushes/pad-holders are engaged.
WARNING!
(Only for FOCUS II L17, FOCUS II L20): Turn the
speed adjuster (B, Fig. 10) counter-clockwise to drive
the machine at the minimum speed.
To engage the brush/pad-holder press the switch (E)
which turns on the brush/pad-holder motor.
To remove the brushes/pad-holders, the deck must be lifted
by pressing the pedal (C), then press the switch (F) and wait
for the brush/pad-holder to fall on the floor.
Turn the ignition key (A) to "0".
1.
2.
3.
4.
5.
6.
7.
8.
9.
Figure 9
Figure 10

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14 Operator’s Manual - FOCUS®II L17 - S20 - L20 - L20 Cyl. - BOOST®L20
Types of brushes available
17 in (430 mm) models 20 in (508 mm) models
Light Grit Light Grit
Medium Grit Medium Grit
Polypropylene Polypropylene
Lite Poly Lite Poly
Brush/pad application guide (suggestions only)
Models Light Grit Medium Grit Polypropylene Lite Poly
General cleaning:
Concrete
Terrazzo floor
Ceramic tiles/quarrystones
Marble
Vinyl tiles
Rubber tiles

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Operator’s Manual - FOCUS®II L17 - S20 - L20 - L20 Cyl. - BOOST®L20 15
Cylindrical brush installation/removal (only for FOCUS
II L20 Cyl.)
Turn the ignition key (A, Fig. 11) to "0".
Lift the cylindrical brush deck by pressing the pedal (B).
Turn the knobs (A, Fig. 12) and remove the doors (B) by
pushing them downwards and pressing on the knobs.
Install the cylindrical brushes (C).
The cylindrical brushes can be installed on either sides.
Install the doors (B) and fasten them with the knobs (A).
To remove the cylindrical brushes, perform steps 1 to 5 in the
reverse order.
1.
2.
3.
4.
5.
6.
Figure 11
Figure 12

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16 Operator’s Manual - FOCUS®II L17 - S20 - L20 - L20 Cyl. - BOOST®L20
Types of cylindrical brushes available
19.1 in (485 mm) models
Poly Plus 0.40
Polypropylene 0.45
Medium Grit
Cylindrical brush application guide (suggestions only)
Models Poly Plus Polypropylene Medium Grit
General cleaning:
Concrete
Terrazzo floor
Ceramic tiles/quarrystones
Marble
Vinyl tiles
Rubber tiles
Squeegee installation
Install the squeegee (A, Fig. 13) and fasten it with the knobs
(B), then connect the vacuum hose (C) to the squeegee.
Adjust the squeegee with the knob (D) so that the rear blade
touches the floor along all its length.
1.
2.
Figure 13
Guide to match squeegees and brush/pad-holder/cylindrical brush decks
Deck model Squeegee model
Deck with one brush, brush diameter: 17in (430 mm)
Aluminum (A, Fig 13), width 29.9 in (760 mm)
Deck with one brush, brush diameter: 20 in (508 mm)
Deck with two brushes, brush length: 19,1 in (485 mm)
Deck with one brush rectangular, brush width: 20 in (508 mm)

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Operator’s Manual - FOCUS®II L17 - S20 - L20 - L20 Cyl. - BOOST®L20 17
Solution or washing water tank filling
NOTE
If the machine is equipped with Chemical Mixing System
(optional) the tank must be filled with clean water,
otherwise the tank must be filled with solution.
Open the filler neck (A, Fig.14).
(For machines without Chemical Mixing System)
Use the front filler neck (B) or the rear filler neck (C) to fill the
tank (D) with a solution suitable for the work to be performed.
Refill to the reference mark “1” of the level check hose (H).
Always follow the dilution instructions on the label of the
chemical product used to prepare the solution.
The solution temperature must not exceed +104°F (+40°C).
WARNING!
Use only low-foam and non-flammable detergents,
intended for automatic scrubber applications.
(For machines with Chemical Mixing System)
Fill the tank (D) with clean water by using the filler neck (B)
or the rear filler neck (C).
Refill to the reference mark “1” of the level check hose (H).
The water temperature must not exceed +104°F (+40°C).
Detergent tank filling (For machines with Chemical
Mixing System)
Open the cover (E) and check that the recovery water tank
(F) is empty, otherwise empty it with the drain hose (G).
Carefully lift the tank (A, Fig. 15).
Open the cap (B).
Replace or fill the jug (C) with any standard gallon container
of detergent suitable for the work to be performed (highly
concentrated detergents).
Do not fill the detergent tank completely, leave a few
centimeters from the edge.
WARNING!
Use only low-foam and non-flammable detergents,
intended for automatic scrubber applications.
NOTE
To install a new jug container, determine the cap size and
if it is the smaller cap, remove the reducing adapter from
the hose cap (B). Insert the suction tube into the jug (C).
Pushdown firmly on the cap (B) and twist at the same
time to put the cap back onto the jug (C).
In case of new system, system emptied for cleaning, etc.,
wait for the hoses to fill up, before starting the Chemical
Mixing System.
1.
2.
3.
1.
2.
3.
4.
Figure 14
Figure 15

ENGLISH
18 Operator’s Manual - FOCUS®II L17 - S20 - L20 - L20 Cyl. - BOOST®L20
MACHINE START AND STOP
Starting the machine
Prepare the machine as shown in the previous paragraph.
Insert the ignition key (A, Fig. 16) and turn it to "I".
Check that the green warning light (B) turns on (charged
battery).
If the yellow (C) or red warning light (D) turns on, turn the
ignition key back to “0” and charge the batteries (see the
procedure in Maintenance chapter).
Drive the machine to the working area:
By pushing it with the hands on the handlebar (E) (only
for FOCUS II S20).
By pushing it with the hands on the handlebar (E) and
pressing the switch (F) to move forward, or pressing the
switch (F) together with the switch (G) to move backward
(only for FOCUS II L17, FOCUS II L20, FOCUS II L20
Cyl., BOOST L20).
The forward speed can be adjusted with the adjuster (H).
Lower the squeegee (I) with the lever (J).
Lower the brush/pad-holder deck (K) by pressing the pedal
(L).
Press the brush/pad-holder switch (M) and the vacuum
system switch (N).
Press the washing water flow control switches (O) as
necessary, depending on the type of cleaning to be
performed.
Start cleaning:
(Only for FOCUS II S20) by pushing the machine with the
hands on the handlebar (E) and pressing the switch (F).
(Only for FOCUS II L17, FOCUS II L20, FOCUS II L20
Cyl., BOOST L20) by pushing the machine with the
hands on the handlebar (E) and by pressing the switch
(F). If necessary, the forward speed can be adjusted with
the adjuster (H).
NOTE
To move the machine forward, press either the left or
right switch (F) or both.
Stopping the machine
Stop the machine by using the handlebar (E) (Only for
FOCUS II S20).
Stop the machine by releasing the switches (F) (Only for
FOCUS II L17, FOCUS II L20, FOCUS II L20 Cyl., BOOST
L20).
Stop the brushes and the vacuum system by pressing the
switch (M). The vacuum system stops after a few seconds.
Lift the brush/pad-holder deck (K) by pressing the pedal (L).
Lift the squeegee (I) with the lever (J).
Turn the ignition key (A) to "0".
Make sure that the machine cannot move independently. ù
1.
2.
3. •
•
4.
5.
6.
7.
8. •
•
9.
10.
11.
12.
13.
14.
Figure 16

ENGLISH
Operator’s Manual - FOCUS®II L17 - S20 - L20 - L20 Cyl. - BOOST®L20 19
MACHINE OPERATION (SCRUBBING/DRYING)
Start the machine as shown in the previous paragraph.
If necessary, press the washing water flow control switches
(A and B, Fig. 17) as necessary, depending on the type of
cleaning to be performed.
If necessary, stop the machine and adjust the squeegee
with the knob (C) so that the rear blade (D) touches the floor
along all its length.
Machine drive controls
CAUTION!
These procedures must be performed by qualified
personnel or Clarke personnel only.
The machine speed and forward movement capability depends on
the floor type and on the choice of using brush or pad.
These can be adjusted by two screws (B and D, Fig.18), which
are on the brush plate, according to the following procedure:
Loosen the nut (A); when turning the adjusting screw (B)
counter-clockwise, the machine moves towards the left;
when turning it clockwise the machine moves towards the
right.
(Only for FOCUS II S20) loosen the nut (C); when turning the
adjusting screw (D) counter-clockwise, the machine speed
increases; when turning it clockwise the machine speed
decreases.
When the procedure is completed, tighten the nuts (A and/or C).
1.
2.
3.
–
–
Figure 17
Figure 18

ENGLISH
20 Operator’s Manual - FOCUS®II L17 - S20 - L20 - L20 Cyl. - BOOST®L20
NOTE
For correct scrubbing/drying of floors at the sides of the
walls, Clarke suggests to go near the walls with the right
side of the machine (A and B, Fig. 19) as shown in the
figure.
CAUTION!
To avoid any damage to the floor surface, turn off the
brushes/pad-holders when the machine stops in one
place, especially when the extra pressure function is
on.
Detergent flow adjustment
(For machines with Chemical Mixing System)
Turn the knob (A, Fig. 20) clockwise or counter-clockwise to
increase or decrease the detergent concentration.
The average detergent concentration values, matching the 4
colored areas of the scale (B), are shown in the figure.
To set the detergent quantity to zero, fully turn the knob (A)
counter-clockwise.
NOTE
The detergent concentration is kept constant even if the
washing water flow is changed with the switches (C) or
(D).
Working with brush/pad-holder extra pressure function
turned on
If the floor proves to be particularly difficult to clean, it is
possible to turn on the brush/pad-holder extra pressure
function by pressing the pedal (E) to position (E3).
CAUTION!
When the cylindrical brush deck (S, Fig. 2 - Page 9) is
installed, the extra pressure function is not enabled.
1.
2.
3. Figure 19
Figure 20