KENT razor blade 28C User manual

Razor Blade 26D/28D
Razor Blade 28C
INSTRUCTIONS FOR USE
KENT model:
908 7099 020 - 908 7100 020 - 908 7101 020
INSTRUCTIONS D’UTILISATION
Modèle KENT:
908 7099 020 - 908 7100 020 - 908 7101 020
INSTRUCCIONES DE USO
Modelo KENT:
908 7099 020 - 908 7100 020 - 908 7101 020
INSTRUÇÕES DE USO
Modelo KENT:
908 7099 020 - 908 7100 020 - 908 7101 020
909 6457 000(2)2006-11

909 6457 000(2)2006-11
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31
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56
25
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28 27 29 413 624
31 13
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77c 7b 7a 8
10
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S311212
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S311213

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S311214
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S311215
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S311216

909 6457 000(2)2006-11
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S311217
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S311218

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S311219
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S311220
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S311221

909 6457 000(2)2006-11
C1
CH
BAT
BK
BK
RD
RD
(*) If the machine have not the optional charger (CH) installed, C2 connectors are connected togheter.
C1
BK
EB1
GN
WH GY
BN
B-
CS CS
B+
YE PK
M2
M1
EV1
RD
F1
RD
RD
SW2
SW1 SW3 M4
F2
BZ1
EB2
YEGN
LD1
F3
SW4
BRK
M6
BU
BN
BK
SW5
BE
M7
F4
K1
EB3 (EB3/2)
SW0
CSC
J2.3 J2.2 J2.1
RV1
BN
BU
BK
PR1
C2(*) C2(*)
BU BK
RD
RD M9(*)
RD
RD
RD
J1.19
J1.1
B+
M8
J3.1 J3.2 J3.3 J3.4
J1.5 J1.4 J1.3
J4.1
J4.2
J4.3 J4.4 J4.5 J4.6
J2.1 J2.2
OUT+
BR- VA-
M3
OUT+
J3.3
J3.6
J2.3
J2.4
J5.1 J5.2
B+ J1.5
J2.7
J2.5 J2.6J2.8
J1.9 J1.8
J1.14 J1.6
J3.4
J1.16
J3.8J3.1
J3.5
J3.7 J1.12 B-
M2
M5
M1
M1
M2
J1.2
J1.17
J1.3J1.4 J1.13J1.18
RD
OG
OG
BU
BN
SW6
BU BN GN
J1.4 J1.5 J1.6
BK
YE
OG
BK
RD
BN BN
BU
RD
BU
J3.2
RV2
YEBKOG
OG
RD BK WH BU
RD
BK
BK
GNBK
WH
OG
OGBK RDBK
RDBK BUBK
BU
RD
OG
J1.7
GNBK
OG
J1.8 J1.7 J1.6 J1.11 J1.10 J1.9 J1.14 J1.13 J1.12 J1.2 J1.16 J1.15
J1.1 J1.2 J1.3 J1.8 J1.9 J1.10 J1.11 J1.12 J1.13 J1.14 J1.15 J1.16 J1.17 J1.18 J1.20
OG
1
3
GN-1 BU-3 RD-3 RD-2 GN-2 OG-3 WH-3 WH-2 BU-2 OG-2 WH-1 RD-1 BU-1 BK OG-1
BU
BN
GN
+
D1
(*) If the machine have the optional charger (CH) installed, the M9 fan is connected as the side box shows.
+
-
+
-
M9 WIRINGS WHEN THE CHARGER
IS INSTALLED ON BOARD
EB1.J5.2
EB1.J5.1
M9
C3 C3
CH
RD
BK
D2
L
S311379

INSTRUCTIONS FOR USE
Razor Blade 26D/28D – Razor Blade 28C — 909 6457 000(2)2006-11 1
INTRODUCTION ................................................................................................................................... 2
MANUAL PURPOSE AND CONTENTS ........................................................................................................... 2
TARGET ........................................................................................................................................................... 2
HOW TO KEEP THIS MANUAL ....................................................................................................................... 2
IDENTIFICATION DATA ................................................................................................................................... 2
OTHER REFERENCE MANUALS .................................................................................................................... 2
SPARE PARTS AND MAINTENANCE ............................................................................................................. 2
CHANGES AND IMPROVEMENTS ................................................................................................................. 2
SAFETY ................................................................................................................................................. 3
SYMBOLS ......................................................................................................................................................... 3
GENERAL INSTRUCTIONS ............................................................................................................................. 3
UNPACKING/DELIVERY ...................................................................................................................... 4
MACHINE DESCRIPTION ..................................................................................................................... 5
OPERATION CAPABILITIES ............................................................................................................................ 5
CONVENTIONS ................................................................................................................................................ 5
DESCRIPTION ................................................................................................................................................. 5
TECHNICAL DATA ........................................................................................................................................... 6
WIRING DIAGRAM ........................................................................................................................................... 7
ELECTRICAL FUSES ....................................................................................................................................... 8
ACCESSORIES/OPTIONS ............................................................................................................................... 8
USE ........................................................................................................................................................ 8
BATTERY CHECK/SETTING ON A NEW MACHINE ...................................................................................... 8
BATTERY INSTALLATION AND BATTERY TYPE SETTING (WET OR GEL) ................................................ 9
BEFORE START-UP ...................................................................................................................................... 10
MACHINE START AND STOP ....................................................................................................................... 11
MACHINE OPERATION ................................................................................................................................. 11
TANK EMPTYING ........................................................................................................................................... 12
AFTER USING THE MACHINE ...................................................................................................................... 12
PUSHING/TOWING THE MACHINE .............................................................................................................. 12
MACHINE LONG INACTIVITY ....................................................................................................................... 12
FIRST PERIOD OF USE ................................................................................................................................ 12
MAINTENANCE .................................................................................................................................. 13
SCHEDULED MAINTENANCE TABLE .......................................................................................................... 13
MACHINE WORKING HOUR CHECK ............................................................................................................ 14
SQUEEGEE CLEANING ............................................................................................................................... 14
SQUEEGEE BLADE CHECK AND REPLACEMENT ..................................................................................... 14
BRUSH/CYLINDRICAL BRUSH CLEANING .................................................................................................. 15
TANK AND VACUUM GRID WITH FLOAT CLEANING ................................................................................. 15
SIDE SKIRT CHECK AND REPLACEMENT .................................................................................................. 15
SOLUTION FILTER CLEANING ..................................................................................................................... 15
BATTERY CHARGING ................................................................................................................................... 16
FUSE CHECK/REPLACEMENT ..................................................................................................................... 16
BRUSH/PAD-HOLDER DECK OR CYLINDRICAL BRUSH DECK DISASSEMBLY/ASSEMBLY ................. 17
SAFETY FUNCTIONS ......................................................................................................................... 17
EMERGENCY STOP BUTTON ...................................................................................................................... 17
SPEED REDUCTION ..................................................................................................................................... 17
DRIVER'S SEAT MICROSWITCH .................................................................................................................. 17
ELECTROMAGNETIC BRAKE ....................................................................................................................... 17
TROUBLESHOOTING ........................................................................................................................ 18
SCRAPPING ........................................................................................................................................ 18

INSTRUCTIONS FOR USE
2Razor Blade 26D/28D – Razor Blade 28C — 909 6457 000(2)2006-11
INTRODUCTION
MANUAL PURPOSE AND CONTENTS
The purpose of this Manual is to provide the operator with all
necessary information to use the machine properly, in a safe
and autonomous way. It contains information about technical
data, safety, operation, storage, maintenance, spare parts
and disposal.
Before carrying out any procedure on the machine, the
operators and qualified technicians must read this Manual
carefully. Contact KENT in case of doubts concerning the
interpretation of the instructions and for any further
information.
TARGET
This Manual is intended for operators and technicians
qualified to perform the machine maintenance.
The operators must not carry out procedures reserved for
qualified technicians. KENT will not be answerable for
damages coming from the non-observance of this prohibition.
HOW TO KEEP THIS MANUAL
The Instructions for Use 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 serial number and model are shown on the plate
(30, Fig. C) on the steering column.
The machine model year is shown after the Date Code on the
serial plate (A06 means January 2006).
This information is useful when requiring machine spare
parts. Use the following table to write down the machine
identification data.
OTHER REFERENCE MANUALS
– Electronic battery charger Manual (to be considered as
integral part of this Manual)
Moreover, the following Manuals are available:
– Service Manual (that can be consulted at KENT Service
Centers).
– Spare Parts List (supplied with the machine)
SPARE PARTS AND MAINTENANCE
All necessary operating, maintenance and repair procedures
must be carried out by qualified personnel or by KENT
Service Centers. Only original spare parts and accessories
must be used.
Contact KENT for service or to order spare parts and
accessories, specifying the machine model and serial
number.
CHANGES AND IMPROVEMENTS
KENT 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 that
were previously sold.
Any change and/or addition of accessory must be approved
and performed by KENT.
MACHINE model ...........................................................
MACHINE serial number ...............................................

INSTRUCTIONS FOR USE
Razor Blade 26D/28D – Razor Blade 28C — 909 6457 000(2)2006-11 3
SAFETY
The following symbols indicate potentially dangerous
situations. Always read this information carefully and take all
necessary precautions to safeguard people and property.
The operator's cooperation is essential in order to prevent
injury. No accident prevention program is effective without the
total cooperation of the person responsible for the machine
operation. Most of the accidents that may occur in a factory,
while working or moving around, are caused by failure to
comply with the simplest rules for exercising prudence. A
careful and prudent operator is the best guarantee against
accidents and is essential for successful completion of any
prevention program.
SYMBOLS
GENERAL INSTRUCTIONS
Specific warnings and cautions to inform about potential
damages to people and machine are shown below.
– Disconnect the batteries before performing any
maintenance/repair procedure.
– This machine must be used by properly trained and
authorized personnel only. Children or disabled people
cannot use this machine.
– Keep the battery far from sparks, flames and
incandescent material. During normal operation,
explosive gases are released.
– Do not wear jewelry when working near electrical
components.
– Do not work under the lifted machine without supporting
it with safety stands.
– Do not operate the machine near toxic, dangerous,
flammable and/or explosive powders, liquids or vapors.
– 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 naked flames.
– Carefully read all the instructions before carrying out any
maintenance/repair procedure.
– To reduce the risk of fire, electric shock, or injury, do not
leave the machine unattended when it is plugged in.
Unplug the machine from the outlet when not in use and
before servicing.
– To avoid electric shock, do not expose to rain. Store the
machine indoors.
– Do not allow to be used as a toy. Close attention is
necessary when used near children.
– Use only as shown in this Manual. Use only KENT's
recommended accessories.
– Do not use with damaged power supply cable or plug. If
the machine is not working as it should, has been
damaged, left outdoors or dropped into water, return it to
the Service Centre.
– Do not pull or carry the machine by the power supply
cable and never use the power supply cable as a handle.
Do not close a door on the power supply cable, or pull
the power supply cable around sharp edges or corners.
Do not run the machine on the power supply cable. Keep
the power supply cable away from heated surfaces.
– Take all necessary precautions to prevent hair, jewelry
and loose clothes from being caught by the machine
moving parts.
– Do not smoke while charging the batteries.
– Do not leave the machine unattended without being sure
that it cannot move independently.
– Do not use the machine on slopes with a gradient
exceeding the specifications.
– Do not wash the machine with direct or pressurized
water jets, or with corrosive substances.
– Do not use the machine in particularly dusty areas.
– While using this machine, take care not to cause
damage to other people, especially children.
– Do not put any can containing fluids on the machine.
– The machine storage temperature must be between
+32°F and +104°F (0°C and +40°C).
– The machine working temperature must be between
+32°F and +104°F (0°C and +40°C).
– The humidity must be between 30% and 95%.
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.
NOTE
It indicates a remark related to important or
useful functions.
CONSULTATION
It indicates the necessity to refer to the
Instructions for Use Manual before performing
any procedure.
DANGER!
WARNING!

INSTRUCTIONS FOR USE
4Razor Blade 26D/28D – Razor Blade 28C — 909 6457 000(2)2006-11
– Always protect the machine against the sun, rain and
bad weather, both under operation and inactivity
condition.
– Do not use the machine as a means of transport.
– Do not use the machine on slopes with an inclination
higher than 16%.
– Do not allow the brushes to operate while the machine is
stationary to avoid damaging the floor.
– In case of fire, use a powder fire extinguisher, not a
water one.
– Do not bump into shelves or scaffoldings, especially
where there is a risk of falling objects.
– Do not tamper with the machine safety guards and follow
the ordinary maintenance instructions scrupulously.
– Do not remove or modify the plates affixed to the
machine.
– In case of machine malfunctions ensure that these are
not caused by a lack of maintenance. Otherwise,
request assistance from the authorized personnel or
from an authorized Service Center.
– If parts must be replaced, require ORIGINAL spare parts
from a Dealer or Authorized Retailer.
– To ensure proper and safe operation of the machine,
have the scheduled maintenance, detailed in the
relevant chapter of this Manual, performed by the
authorized personnel or an authorized Service Center.
– 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).
– 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.
– This machine cannot be used on roads or public streets.
– Pay attention during machine transport, when
temperature is below freezing point, because the water
in the recovery tank or in the hoses could freeze and
seriously damage the machine.
– Use only brushes and pads supplied with the machine or
specified in this Manual. Using other brushes or pads
could reduce safety.
– When WET batteries are installed on the machine, do
not tilt the machine for more than 30° from the horizontal
plane to prevent the highly corrosive acid from leaking
out of the batteries. If the machine must be tilted to
perform any maintenance procedures, remove the
batteries.
UNPACKING/DELIVERY
To unpack the machine, carefully follow the instructions on
the packing.
When the machine is delivered, check that the packing and
the machine were not 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.
Check that the machine is equipped with the following
features.
1. Technical documents:
– Scrubber-dryer Instructions for Use Manual
– Electronic battery charger Manual
– Scrubber-dryer Spare Parts List
2. No. 2 lamellar fuses
3. No. 5 shims for 6V battery housing
4. One 2 mm-key for socket screws

INSTRUCTIONS FOR USE
Razor Blade 26D/28D – Razor Blade 28C — 909 6457 000(2)2006-11 5
MACHINE DESCRIPTION
OPERATION CAPABILITIES
This scrubber-dryer is used to clean (scrubbing and drying)
smooth and solid floors, in civil or industrial environment,
under safe operation conditions by a qualified operator.
The scrubber-dryer cannot be used for moquette and carpet
cleaning.
CONVENTIONS
Forward, backward, front, rear, left or right are intended with
reference to the operator’s position, that is to say on the
driver's seat (25, Fig. C).
DESCRIPTION
Control panel
(See Fig. B)
1. Control panel
2. Emergency stop button
3. Horn
4. Brush/pad-holder deck and squeegee lifting/lowering
switch
5. Brush/pad-holder extra pressure switch (disabled when
the cylindrical brush deck is installed)
6. Squeegee lifting/lowering and vacuum ON/OFF switch
7. Battery charge indicator
7a. Green warning light (ON: charged batteries)
7b. Yellow warning light (ON: nearly discharged batteries)
7c. Red warning light (ON: discharged batteries)
8. Hour counter and solution level display:
– When the machine is started, it displays for a few
seconds the number of working hours which have
been performed.
– While using the machine, it displays the solution level
in the tank (measured in percentage terms,
compared with the full tank).
When the level is below 20%, the display starts
blinking.
The display could indicate “000 %” even if the tank is
not completely empty, allowing to complete the
cleaning procedures; in any case, please check the
actual solution flow to the brushes.
10. Solution flow to brushes control switches
10a. Flow increase switch
10b. Flow decrease switch
11. Maximum speed adjuster (enabled only when the
brushes are operating)
12. Ignition key
Outside view
(See Fig. C)
1. Steering wheel inclination control lever
2. Steering wheel
3. Forward/reverse gear pedal
4. Brush/pad-holder deck
5. Cylindrical brush deck
6. Side skirts
7. Battery charger cable housing
8. Battery charger cable with plug
9. Solution filter
10. Recovery water drain hose
11. Squeegee vacuum hose
12. Squeegee
13. Bumper wheels
14. Squeegee support wheels
15. Squeegee mounting handwheels
16. Squeegee balance adjusting knob
17. Front squeegee blade
18. Rear squeegee blade
19. Squeegee rear blade fastening hook
20. Solution tank
21. Recovery water tank
22. Recovery water tank cover
23. Flashing light (optional)
24. Solution tap
25. Seat
26. Battery charger
27. Electromagnetic brake
28. Front steering, driving and braking wheel
29. Electromagnetic brake unlock screws
30. Serial number plate/technical data
31. Rear wheels
View under tank covers
(See Fig. I)
1. Recovery water tank cover
2. Recovery water tank cover gasket
4. Recovery water vacuum duct
5. Vacuum grid with automatic shut-off float
6. Float
7. Grid fasteners
8. Solution inlet opening
9. Solution tank cap
13. Cover stand
14. Recovery water tank
15. Solution tank

INSTRUCTIONS FOR USE
6Razor Blade 26D/28D – Razor Blade 28C — 909 6457 000(2)2006-11
View under tank assembly
(See Fig. J)
1. Tank assembly
2. Batteries
3. Battery case
4. Battery connector
5. Battery caps
6. Battery connection diagrams
Brush/pad-holder deck and cylindrical brush deck
view
(See Fig. K)
1. Brush/pad-holder deck
2. Brush/pad-holder motors
3. Brush/pad-holder deck or cylindrical brush deck
connector
4. Solution supply hose
5. Deck mounting knob
6. Deck cotter pins
7. Deck support
8. Brush
9. Pad-holder
10. Pad
11. Cylindrical brush deck connector
12. Connector protection cover
13. Cylindrical brush deck
14. Cylindrical brush motors
15. Brush/pad-holder deck side skirt
16. Cylindrical brush deck side skirt
17. Skirt upper mounting knob
18. Skirt lower mounting knob
19. Cylindrical brush
20. Cylindrical brush doors
21. Door mounting knobs
22. Cylindrical brush debris container
23. Debris container handle
TECHNICAL DATA
General technical data
Description 26D 28D-28C
Cleaning width 26.0 in (660 mm) 29.1 in (740 mm)
Squeegee width 32.7 in (830 mm) 33.9 in (860 mm)
Solution tank capacity 20.0 gal (75 liters)
Recovery water tank capacity 20.0 gal (75 liters)
Rear wheel diameter 11.8 in (300 mm)
Wheel specific pressure on the floor Less than 1.0 N/mm2
Front steering, driving and braking wheel diameter 9.8 in (250 mm)
Vacuum system motor power 0.68 HP (500 W)
Drive system motor power 0.80 HP (600 W)
Drive speed (variable) 0 to 3.7 MPH (0 to 6 km/h)
Gradeability 16%
Sound pressure level (at the operator's position) 67.5 dB(A)
Vibration level at the operator's arms (*) 0.23 – 7.5 m/s2
Vibration level at the operator's body (*) Less than 1.2 m/s2
Batteries
24 V battery box, 240 Ah/5 h (WET) 240 Ah C5
24 V battery box, 240 Ah/5 h (GEL) (optional) 240 Ah C5
4 6 V batteries, 180 Ah/5 h (WET) 180 Ah C5
4 6 V batteries, 180 Ah/5 h (GEL) (optional) 180 Ah C5
Battery compartment size 24 V battery box: 14.0 x 23.9 x 14.6 in (355 x 606 x 370 mm)
4 6 V batteries, with case: 20.8 x 15.0 x 11.8 in (530 x 380 x 300 mm)
Vacuum system capacity 70.8 in H2O (1,800 mmH2O)
Machine height 49.2 in (1,250 mm)
Machine maximum length 57.0 in (1,450 mm)
Machine width without squeegee 26.8 in (681.5 mm) 30.0 in (758 mm)

INSTRUCTIONS FOR USE
Razor Blade 26D/28D – Razor Blade 28C — 909 6457 000(2)2006-11 7
(*) Under normal working conditions, on a level asphalt surface.
WIRING DIAGRAM
(See Fig. L)
BAT: 24V battery
BE: Flashing light
BRX: Electromagnetic brake
BZ1: Reverse gear warning buzzer/horn
C1: Battery connector
C2: Battery charger auxiliary connector
C3: Battery charger external fan auxiliary connector
CH: Battery charger
CS: Brush/pad-holder deck connector
CS: Cylindrical brush deck secondary connector
EB1: Function electronic board
EB2: Drive system electronic board
EB3: Electronic board (under the control panel)
EB3/2: Electronic board (under control panel) (optional)
EV1: Washing water solenoid valve (if equipped)
F1: Function electronic board fuse
F2: Drive system electronic board fuse
F3: Low power circuit fuse
F4: Pump fuse (if equipped)
K1: Ignition switch
LD1: Drive system electronic board diagnostic warning light
M1: Left brush motor
M2: Right brush motor
M3: Vacuum system motor
M4: Brush deck actuator
M5: Drive system motor
M6: Squeegee actuator
M7: Washing water pump (if equipped)
M8: Solution pump (if equipped)
M9: Cooling fan
PR1: Washing water level sensor (if equipped)
RV1: Working speed potentiometer
RV2: Speed potentiometer (pedal)
SW0: Emergency stop button
SW1: Actuator position 0 microswitch
SW2: Actuator position 1 microswitch
SW3: Actuator position 2 microswitch
SW4: Steering sensor
SW5: Seat microswitch
SW6: Reverse gear switch (if equipped)
Color code
BK: Black
BU: Blue
BN: Brown
GN: Green
GY: Grey
OG: Orange
PK: Pink
RD: Red
VT: Violet
WH: White
YE: Yellow
Technical data for machines with brush/pad-holder deck
Description 26D 28D
Brush diameter 13.0 in (330 mm) 14.5 in (370 mm)
Weight without batteries and with empty tanks 308 lb (140 kg)
Maximum weight with batteries and full tanks 848.5/1,035.8 lb (385/470 kg)
Brush/pad-holder motor power 0.54 HP (400 W)
Brush/pad-holder rotation speed 190 rpm
Brush/pad-holder pressure with extra-pressure deactivated 66 lb (30 kg)
Brush/pad-holder pressure with extra-pressure activated 110 lb (50 kg)
Technical data for machines with cylindrical brush deck
Description 28C
Cylindrical brush size (diameter x length) 5.7 x 27.1 in (145 x 690 mm)
Weight without batteries and with empty tanks 308 lb (140 kg)
Maximum weight with batteries and full tanks 847.0/1,035.8 lb (385/470 kg)
Cylindrical brush motor power 0.81 HP (600 W)
Cylindrical brush rotation speed 748 rpm
Cylindrical brush pressure 73.5 lb (33.4 kg)

INSTRUCTIONS FOR USE
8Razor Blade 26D/28D – Razor Blade 28C — 909 6457 000(2)2006-11
ELECTRICAL FUSES
Fuses
– The following fuses are located under the cover (1, Fig.
H):
– Low power circuit protection fuse (F3) (5A): (2, Fig.
H)
– Drive system electronic board protection fuse (F2)
(60A): (3, Fig. H)
– Function electronic board protection fuse (F1)
(100A): (4, Fig. H)
ACCESSORIES/OPTIONS
In addition to the standard components, the machine can be
equipped with the following accessories/options, according to
the machine specific use:
1. GEL batteries
2. Brushes of different materials
3. Oil-proof squeegee blades
4. Front and rear wheels of different materials
5. Flashing light
For further information concerning the above-mentioned
optional accessories, contact an authorized Retailer.
USE
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
The machine requires one of the followings:
– One 24 V battery box, 240 Ah/C5 (WET)
– One 24 V battery box, 240 Ah/C5 (GEL) (optional)
– 4 6 V batteries, 180 Ah C5 (WET)
– 4 6 V batteries, 180 Ah C5 (GEL)
WARNING!
On some points of the machine there are some
adhesive plates indicating:
– DANGER
– WARNING
– CAUTION
–CONSULTATION
WARNING!
The electric components of this machine can
be seriously damaged if batteries are either
installed or connected improperly. 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
gel batteries).
Check the batteries for damage before
installation.
Disconnect the battery connector and the
battery charger plug.
Handle the batteries with great care.
Install the battery terminal protection caps
supplied with the machine.

INSTRUCTIONS FOR USE
Razor Blade 26D/28D – Razor Blade 28C — 909 6457 000(2)2006-11 9
The machine can be supplied in one of the following modes:
a) Batteries (WET or GEL) already installed on the
machine and ready to be used.
1. Lift the covers (1 and 13, Fig. I) and check that the tanks
(15 and 16) are empty, otherwise drain them through the
drain hose (10, Fig. C) and the tap (24).
2. Close the covers (1 and 13, Fig. I).
3. Carefully lift the tank assembly (1, Fig. J).
4. Check that the batteries are connected to the machine
with the connector (4, Fig. J).
5. Carefully close the tank assembly (1, Fig. J).
6. Insert the ignition key (12, Fig. B) and turn it to “I”. If the
green warning light (7a, Fig. B) turns on, the batteries
are ready to be used. If the yellow or red warning light
(7b or 7c, Fig. B) turns on, it is necessary to charge the
batteries (see procedure in Maintenance chapter).
b) Batteries (WET) installed on the machine but without
electrolyte.
1. Lift the covers (1 and 13, Fig. I) and check that the tanks
(15 and 16) are empty, otherwise drain them through the
drain hose (10, Fig. C) and the tap (24).
2. Close the covers (1 and 13, Fig. I).
3. Carefully lift the tank assembly (1, Fig. J).
4. Remove the caps (5, Fig. J) of the batteries (2).
5. Fill up the battery elements with sulphuric acid for
batteries [density from 2.80 to 2.84 lb at 77°F (1.27 to
1.29 kg at 25°C)] in accordance with the instructions
specified in the Battery Manual.
The correct quantity of sulphuric acid is indicated in the
Battery Manual.
6. To avoid damaging the floor, dry with a cloth both acid
and water on the top of the batteries after charging.
7. Let the batteries rest and fill in with sulphuric acid as
shown in the Battery Manual.
8. Charge the batteries (see the procedure in Maintenance
chapter).
c) Without batteries
1. Buy appropriate batteries (see the Technical Data
paragraph).
For battery choice and installation, apply to qualified
battery Retailers.
2. Set the machine and the battery charger according to
the type of batteries installed (WET or GEL).
3. Install the batteries.
4. Charge the batteries.
BATTERY INSTALLATION AND BATTERY
TYPE SETTING (WET OR GEL)
According to the type of batteries (WET or GEL), set the
electronic board of the machine and of the battery charger,
according to the following procedure:
Machine setting
1. Turn the ignition key (12, Fig. B) to “I” and pay attention
to the following in the very first seconds of machine
operation:
– If the green warning light (7a) is flashing, the
machine is set to GEL
– If the red warning light (7c) is flashing, the machine
is set to WET
2. To change the settings, proceed as follows.
3. Turn off the machine by turning the ignition key (12, Fig.
B) to “0”.
4. Press and hold the switch (6, Fig. B), then turn the
ignition key (12, Fig. B) to “I”.
5. Release the switch (6, Fig. B) at least 5 seconds after
starting the machine.
6. Press again the switch (6, Fig. B) for a few seconds and
check that the warning light of the required setting is
flashing.
Battery charger setting
7. Remove the screws (5, Fig. H) and the panel (1).
8. Turn the selector (6, Fig. H) to “WET” or “GEL” according
to the type of batteries installed.
9. Install the panel (1, Fig. H) and tighten the screws (5).
Battery installation
10. Lift the covers (1 and 13, Fig. I) and check that the tanks
(15 and 16) are empty, otherwise drain them through the
drain hose (10, Fig. C) and the tap (24).
11. Close the covers (1 and 13, Fig. I).
12. Carefully lift the tank assembly (1, Fig. J).
13. Install the batteries and connect them according to the
diagram (6, Fig. J).
Battery charging
14. Charge the batteries (see the procedure in Maintenance
chapter).
WARNING!
Pay attention when using sulphuric acid, as it
is corrosive. If it comes in contact with skin or
eyes, rinse thoroughly with water and consult
a physician.
Batteries have to be filled in a well-ventilated
area.
Wear protective gloves.
CAUTION!
If a battery box is installed, place it on the left
side of the machine, to allow the tank assembly
(1, Fig. J) to be closed correctly.

INSTRUCTIONS FOR USE
10 Razor Blade 26D/28D – Razor Blade 28C — 909 6457 000(2)2006-11
BEFORE START-UP
Deck installation/removal
The machine can be equipped with either the
brush/pad-holder deck (4, Fig. C) or the cylindrical brush deck
(5).
For deck installation/removal see the procedure in
Maintenance chapter.
Brush/pad-holder installation/removal
1. According to the kind of cleaning to be carried out, the
machine can be equipped either with brushes (8, Fig. K)
or pad-holders (9) with pads (10) together with the
appropriate deck.
For the installation/removal, proceed as follows.
2. Insert the ignition key (12, Fig. B) and turn it to “I”.
3. Lift the deck by pressing the switch (4, Fig. B).
4. Turn the ignition key (12, Fig. B) to “0” and remove it.
5. Install the brushes/pad-holders (8 or 9, Fig. K) and lift
them completely, then turn them clockwise (see the
arrows in Fig. K) until the end of stroke.
6. To remove the brushes/pad-holders, carry out steps 2 to
5 in the reverse order.
Cylindrical brush installation/removal
7. Insert the ignition key (12, Fig. B) and turn it to “I”.
8. Lift the deck by pressing the switch (4, Fig. B).
9. Turn the ignition key (12, Fig. B) to “0” and remove it.
10. On both sides of the machine, unscrew the knobs (17,
Fig. K) and remove the side skirt assemblies (16).
11. Unscrew the knobs (21, Fig. K) and remove the doors
(20) by pushing the knobs downwards.
12. Install the cylindrical brushes (19).
The cylindrical brushes can be installed on either sides.
13. Install the doors (20, Fig. K) and fix them with the knobs
(21).
14. To remove the cylindrical brushes, carry out steps 7 to 13
in the reverse order.
Squeegee installation
15. Install the squeegee (12, Fig. C) and fasten it with the
handwheels (15), then connect the hose (11) to the
squeegee.
16. Using the handwheel (16, Fig. C), adjust the squeegee
so that its rear blade (18) - in all its length - touches the
floor and that the front blade (17) is slightly detached
from the floor.
Solution tank filling
17. Open the cover (13, Fig. I).
18. Fill the solution tank (16, Fig. I) with a solution suitable
for the work to be carried out.
Do not fill the solution tank completely, leave few inches
from the edge.
Always follow the dilution instructions on the label of the
chemical product used to create the solution.
The solution temperature must not exceed 104°F
(40°C).
Operator's position adjustment
19. Using the lever (1, Fig. C), adjust the inclination of the
steering wheel (2) to reach a comfortable position.
WARNING!
At every machine start-up, check that, between
the deck (4 or 5, Fig. C) and the machine or
between the squeegee (12, Fig. C) and the
machine, there is no foreign material which
may prevent the deck and the squeegee from
lifting. This check is necessary because, if the
machine has been turned off without lifting the
deck and the squeegee, when turned on again,
the deck and the squeegee lift automatically.
NOTE
When the deck is installed/removed, it may be
necessary to change the squeegee too,
because they must have the same width. For
correct deck and squeegee matching, see the
Technical Data paragraph.
WARNING!
Before pressing the switch (4, Fig. B), always
check that, between the deck (4, Fig. C) and the
machine there is no foreign material which may
prevent the deck from lifting.
WARNING!
Before pressing the switch (4, Fig. B), always
check that, between the deck (5, Fig. C) and the
machine there is no foreign material which may
prevent the deck from lifting.
NOTE
The squeegee and the deck must have the
same width. For correct deck and squeegee
matching, see the Technical Data paragraph.
CAUTION!
Use only low-foam and non-flammable liquid
detergents, intended for automatic scrubber
applications.

INSTRUCTIONS FOR USE
Razor Blade 26D/28D – Razor Blade 28C — 909 6457 000(2)2006-11 11
MACHINE START AND STOP
Start
1. Prepare the machine as shown in the previous
paragraph.
2. Turn the ignition key (12, Fig. B) to “I” without pressing
the forward gear pedal (3, Fig. C). Check if the green
warning light (7a, Fig. B) turns on.
If the yellow or red warning light (7b o 7c, Fig. B) turns
on, turn the key back to “0”, then charge the batteries
(see the procedure in Maintenance chapter).
3. Drive the machine to the working area, by keeping the
hands on the steering wheel and pressing the pedal (3,
Fig. C) on the front side to move forward and on the rear
side to move backward.
The drive speed can be adjusted from zero to maximum
speed according to the pressure on the pedal (3, Fig. C).
4. Lower the brush/pad-holder deck and the squeegee by
pressing the switch (6, Fig. B).
5. Press the solution flow control switches (10, Fig. B)
according to the type of cleaning to be carried out.
6. Start scrubbing, by turning the steering wheel (2, Fig. C)
and moving the machine forward by pressing the pedal
(3).
7. If necessary, adjust the working speed using the
maximum speed adjuster (11, Fig. B). The adjuster is
enabled only when the machine is operating (scrubbing
and/or drying).
Stopping the machine
8. Release the pedal (3, Fig. C).
9. It is not necessary to lock the machine during stopping
or parking, because the electromagnetic brake (27, Fig.
C) activates automatically when the forward gear pedal
is not pressed.
10. Lift the brush/pad-holder deck and the squeegee by
pressing the switch (6, Fig. B).
MACHINE OPERATION
1. Start the machine as shown in the previous paragraph.
2. If necessary, adjust the solution flow sent to the brushes
by pressing the switches (10, Fig. B).
Squeegee adjustment
3. If necessary, stop the machine and adjust the balancing
handwheel (16, Fig. C) of the squeegee (12).
Working with brush/pad-holder extra pressure
function turned on
4. 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 switch (5, Fig. B).
5. To return to normal pressure, press the switch (5, Fig. B)
again.
The switch (5, Fig. B) is enabled only when the deck (4,
Fig. C) is lowered and the switch warning light (4, Fig. B)
is on.
NOTE
The seat (25, Fig. C) is equipped with a safety
sensor, which allows the machine to be moved
with the pedal (3, Fig. C) only when the
operator is on the driver's seat.
NOTE
The machine is equipped with an anti-tilting
safety system that reduces the speed when
turning, irrespectively of the pressure on the
gear pedal.
The reduction of speed when turning is not a
malfunction but a characteristic that improves
the machine stability in every condition.
CAUTION!
To avoid any damage to the floor surface, turn
off the brush/pad-holder when the machine
stops in one place, especially when the extra
pressure function is on.
NOTE
When the cylindrical brush deck is installed,
the extra pressure function is disabled.
CAUTION!
In case of brush/pad-holder motor overload,
due to foreign material which prevent the
brushes/pad-holders from rotating, or to
excessively aggressive floors/brushes, the
safety system stops the brushes/pad-holders
after about one minute of continuous overload.
The overload condition is shown by the three
warning lights (7a, 7b, 7c, Fig. B) flashing
simultaneously.
If the overload takes place when the extra
pressure function is on, the system
automatically reduces the pressure on the
brushes/pad-holders, thus turning the extra
pressure function off. If the overload persists,
the brushes/pad-holders stop.
To start scrubbing again after a
brush/pad-holder stop due to overload, stop
the machine by turning the ignition key (12,
Fig. B) to “0”. Restart the machine by turning
the ignition key to “I”.

INSTRUCTIONS FOR USE
12 Razor Blade 26D/28D – Razor Blade 28C — 909 6457 000(2)2006-11
Battery discharge during operation
6. Until the green warning light (7a, Fig. B) stays on, the
batteries allow the machine to work normally.
When the green warning light (7a) turns off and first the
yellow warning light (7b) and then the red warning light
(7c) turn on, it is necessary to charge the batteries.
– When the yellow warning light (7b) turns on, the
machine residual autonomy will last for a few
minutes (depending on battery type).
– When the red warning light (7c) turns on the machine
autonomy is over: after a few seconds the
brushes/pad-holders are automatically stopped and
the deck is automatically lifted. Only the machine
vacuum and drive systems still operate, just to dry
the wet floor and move the machine to the charging
area.
TANK EMPTYING
An automatic float shut-off system (5, Fig. I) stops the vacuum
system when the recovery water tank (15) is full.
The vacuum system deactivation is signaled by a sudden
increase in the vacuum system motor noise frequency.
When the recovery water tank (15, Fig. I) is full, empty it
according to the following procedure.
Recovery water tank emptying
1. Stop the machine by releasing the pedal (3, Fig. C).
2. Lift the brush/pad-holder deck and the squeegee by
pressing the switch (4, Fig. B).
3. Drive the machine to the appointed disposal area.
4. Empty the recovery water tank through the hose (10, Fig.
C). After working, rinse the tank with clean water.
Solution tank emptying
5. Carry out steps 1 to 3.
6. Empty the solution tank using the tap (24, Fig. C). After
working, rinse the tank with clean water.
AFTER USING THE MACHINE
After working, before leaving the machine:
1. Remove the brushes/pad-holders according to the
procedure shown in the relevant paragraph.
2. Empty the tanks (15 and 16, Fig. I) according to the
procedure shown in the previous paragraph.
3. Perform the daily maintenance procedures (see the
Maintenance chapter).
4. Store the machine in a clean and dry place, with the
brushes/pad-holders and the squeegee lifted or
removed.
PUSHING/TOWING THE MACHINE
To push/tow the machine easily when the drive system
cannot be used, unlock the electromagnetic brake (27, Fig. C)
according to the following procedure:
1. Screw down completely the internal screws (29, Fig. C)
(by turning them clockwise) with the supplied key.
2. When pushing/towing procedure is over, unscrew the
screws (29, Fig. C) for 3 turns approximately, to lock the
electromagnetic brake (27).
MACHINE LONG INACTIVITY
If the machine is not going to be used for more than 30 days,
proceed as follows:
1. Perform the procedures shown in After using the
machine paragraph.
2. Disconnect the battery red connector (4, Fig. J) by
proceeding as follows:
– Lift the covers (1 and 13, Fig. I) and check that the
tanks (15 and 16) are empty, otherwise drain them
through the drain hose (10, Fig. C) and the tap (24).
– Close the covers (1 and 13, Fig. I).
– Carefully lift the tank assembly (1, Fig. J).
3. Drain the detergent supply system, according to the
procedure described in the Maintenance chapter [only
for machine equipped with detergent supply system
(optional)].
FIRST PERIOD OF USE
After the first 8 hours, check the machine fastening and
connecting parts for proper tightening. Check the visible parts
for integrity and leakage.
CAUTION!
Do not use the machine with discharged
batteries, to avoid damaging the batteries and
reducing the battery life.
NOTE
In case the machine drive system cannot be
used to move the machine, see
Pushing/towing the machine paragraph.
WARNING!
If the screws (29, Fig. C) are not unscrewed as
shown, the electromagnetic brake is
deactivated.
WARNING!
Do not start the machine when the
electromagnetic brake unlocking screws (29,
Fig. C) are screwed (electromagnetic brake
deactivated).

INSTRUCTIONS FOR USE
Razor Blade 26D/28D – Razor Blade 28C — 909 6457 000(2)2006-11 13
MAINTENANCE
The lifespan of the machine and its maximum operating safety are ensured by correct and regular maintenance.
The following chart provides the scheduled maintenance. The intervals shown may vary according to particular working
conditions, which are to be defined by the person in charge of the maintenance.
All scheduled or extraordinary maintenance procedures must be performed by qualified personnel, or by an authorized Service
Center.
This Manual contains the Scheduled Maintenance Table and describes only the easiest and most common maintenance
procedures.
SCHEDULED MAINTENANCE TABLE
(1): After the first 8 working hours
(2): This maintenance procedure must be performed by a KENT authorized Service Center
WARNING!
The procedures must be carried out with the machine off and the battery disconnected.
Moreover, before performing the maintenance, carefully read all the instructions in Safety chapter.
NOTE
For other maintenance procedures shown in the Scheduled Maintenance Table, refer to the Service Manual
that can be consulted at any Service Center.
Procedure Daily or after using
the machine Weekly Every six months Yearly
Squeegee cleaning
Brush/cylindrical brush cleaning
Tank and vacuum grid with float cleaning
Battery charging
Squeegee blade check and replacement
Side skirt check
Solution filter cleaning
Battery (WET) fluid level check
Screw and nut tightening check (1)
Check and adjustment of driving belts from motors to
cylindrical brushes (2)
Squeegee cable sliding shoe lubrication (2)
Electromagnetic brake efficiency check (2)
Brush/pad-holder motor carbon brush check or
replacement (2)
Vacuum system motor carbon brush check or
replacement (2)
Drive system motor carbon brush check or
replacement (2)