Tennant T20 LPG User manual

T20
*331481*
331481
Rev. 10 (3-2013)
Rider Scrubber
English EN
Operator Manual
(Gas/LPG)
To view, print or download
the latest manual, visit:
www.tennantco.com/manuals

INTRODUCTION
This manual is furnished with each new model. It provides necessary operation and maintenance instructions.
Read this manual completely and understand
the machine before operating or servicing it.
This machine will provide excellent service. However, the best results will be obtained at minimum costs if:
The machine is operated with reasonable care.
The machine is maintained regularly - per the machine maintenance instructions provided.
The machine is maintained with manufacturer supplied or equivalent parts.
PROTECT THE ENVIRONMENT
Please dispose of packaging materials,
old machine components and fluids in
an environmentally safe way according
to local waste disposal regulations.
Always remember to recycle.
Model No. −
Serial No. −
Installation Date −
Please fill out at time of installation for future
reference.
MACHINE DATA
INTENDED USE
The T20 is an industrial rider machine designed to scrub hard surfaces (concrete, asphalt, stone,
synthetic, etc). Typical applications include industrial warehouses, manufacturing facilities, distribution
facilities, stadiums, arenas, convention centers, parking facilities, transportation terminals, and
construction sites. Do not use this machine on soil, grass, artificial turf, or carpeted surfaces. This
machine can be used both indoors and outdoors, but ensure there is adequate ventilation if used indoors.
This machine is not intended for use on public roadways. Do not use this machine other than described in
this Operator Manual.
Tennant N.V.
Industrielaan 6 5405 AB
P.O. Box 6 5400 AA Uden−The Netherlands
[email protected]
www.tennantco.com
Specificationsand parts are subject to change without notice.
Original Instructions, copyright 2006 −2013 TENNANT Company, Printed in The Netherlands
DECLERATION OF CONFORMITY FOR MACHINERY
(according to Annex II A of the Machinery Directive)
TENNANT N.V.
Industrielaan 6 5405 AB
P.O. Box 6 5400 AA
Uden −The Netherlands
Uden, 21−05−2010
EN
Herewith declares, on our own responsibility, that the machinery
T20
−is in conformity with the provisions of the Machinery Directive (2006/42/EC), as amended and with national
implementing legislation
−is in conformity with the provisions of the Electro Magnetic Compatibility Directive 2004/108/EC
and that
−the following harmonized standards or parts of these standards have been applied: EN ISO 14121−1, EN
1037, EN 60335−1, EN 60204−1, EN ISO 13849−1, EN ISO 13849−2, EN 60529, EN ISO 4413, EN 349, EN
55012, EN 61000−6−2, EN ISO 11201, EN ISO 4871, EN ISO 3744*, EN ISO 13059*, EN ISO 3450, EN
60335−2−72.
−the following national standards or parts of these standards have been used:

CONTENTS
1
T20 Gas/LPG 331481 (3−2013)
CONTENTS
Page
IMPORTANT SAFETY INSTRUCTIONS −SAVE
THESE INSTRUCTIONS 3...............
OPERATION 7............................
MACHINE COMPONENTS 7.............
CONTROLS AND INSTRUMENTS 8......
TOUCH PANEL 9.......................
SYMBOL DEFINITIONS 10................
OPERATION OF CONTROLS 11..........
CHARGING SYSTEM INDICATOR 11...
ENGINE OIL PRESSURE INDICATOR 11
CHECK ENGINE INDICATOR 11........
PARKING BRAKE INDICATOR 11.......
SETTING THE ENGINE SPEED 12.....
SIDE BRUSH (OPTION) 12............
FUEL INDICATOR 12..................
GASOLINE MACHINES 12.............
LPG MACHINES 12...................
HOUR METER 13.....................
SUPERVISOR CONTROL BUTTONS 13.
OPERATING LIGHTS 13...............
HAZARD LIGHT (OPTION) 13..........
OPERATOR SEAT 14..................
SEAT BELTS 14......................
STEERING COLUMN TILT KNOB 14....
BRAKE PEDAL 15....................
PARKING BRAKE PEDAL 15...........
DIRECTIONAL PEDAL 15..............
SQUEEGEE PROTECTORS (OPTION) 15
HOW THE MACHINE WORKS 16..........
BRUSH INFORMATION 16................
WHILE OPERATING THE MACHINE 17....
PRE−OPERATION CHECKLIST 18.........
CHANGING THE LPG TANK 19...........
STARTING THE MACHINE 20.............
TURNING OFF THE MACHINE 20.........
FILLING THE SOLUTION TANK 21........
FOAM SCRUBBING (FaST MODE) /
ec−H2O SCRUBBING
(ec−H2O MODE) 21.............
CONVENTIONAL SCRUBBING MODE 21
ES (EXTENDED SCRUB) MODE WITH
AUTO−FILL 22.....................
ES (EXTENDED SCRUB) MODE −
MANUALLY FILLING TANKS 22......
SETTING SCRUB MODES 23.............
SETTING FaST MODE 23..............
SETTING ES (EXTENDED SCRUB)
MODE 23.........................
SETTING ec−H2O MODE 23...........
SETTING BRUSH PRESSURE 23.......
SETTING SOLUTION FLOW 24........
CONVENTIONAL, FaST, AND ec−H2O
SOLUTION FLOW 24...............
ES (EXTENDED SCRUB) SOLUTION
FLOW 24..........................
SCRUBBING 25.........................
DOUBLE SCRUBBING 26.................
WATER PICKUP MODE
(NO SCRUBBING) 27..................
EMPTYING AND CLEANING THE DEBRIS
TRAY −CYLINDRICAL SCRUB HEADS
ONLY 28..........................
Page
DRAINING AND CLEANING THE
RECOVERY TANK 30.................
DRAINING THE RECOVERY TANK
WITH THE DRAIN HOSE 30.........
DRAINING THE RECOVERY TANK
WITH THE DRAIN PLUG 32.........
DRAINING AND CLEANING THE
SOLUTION TANK 34..................
FAULT INDICATOR(S) 36.................
CONDITIONS / WARNINGS 37............
OPTIONS 38............................
SPRAY NOZZLE (OPTION) 38..........
VACUUM WAND (OPTION) 39..........
POWER WAND (OPTION) 40...........
MACHINE TROUBLESHOOTING 42.......
MAINTENANCE 44.........................
MAINTENANCE CHART 45...............
LUBRICATION 48........................
ENGINE OIL 48.......................
SQUEEGEE CASTER BEARINGS 48...
FRONT WHEEL SUPPORT BEARING 48
STEERING CYLINDER BEARING 48....
TORQUE TUBES−CYLINDRICAL
BRUSHES 49......................
TORQUE TUBES−DISK BRUSHES 49...
PIVOT SHAFT−DISK BRUSHES 49.....
HYDRAULICS 50........................
HYDRAULIC FLUID 51................
HYDRAULIC HOSES 51...............
ENGINE 52.............................
COOLING SYSTEM 52................
AIR FILTER 53........................
FUEL FILTER (LPG) 53................
ELECTRONIC PRESSURE REGULATOR
(LPG) (For machines serial
number 0044 −0499) 54..........
LPG VAPORIZER 54..................
FUEL FILTER (Gasoline) 54............
ENGINE BELT 55.....................
PCV SYSTEM 55.....................
SPARK PLUGS −GM ENGINES
(S/N 0000 −0499) 55...............
SPARK PLUGS −MITSUBISHI ENGINES
(S/N 0500−) 55.................
TIMING BELT −GM ENGINES
(S/N 0000 −0499) 56...............
CAMSHAFT AND BALANCE SHAFT
BELTS −MITSUBISHI ENGINES
(S/N 0500−) 56..............
BATTERY 56............................
FUSES AND RELAYS 57.................
RELAY PANEL FUSES AND RELAYS 57.
ENGINE HARNESS FUSES AND
RELAYS 58........................
CIRCUIT BREAKERS (ec−H2O) 58......
SCRUB BRUSHES AND PADS 58.........
DISK BRUSHES 58...................
REPLACING DISK BRUSHES OR
PAD DRIVER 59...................
REPLACING DISK PADS 60............
CHECKING THE DISK SCRUB HEAD
STOP BUMPERS 60................

CONTENTS
T20 Gas/LPG 331481 (3−2013)
2
Page
CYLINDERICAL BRUSHES 61..........
REPLACING OR ROTATING
CYLINDERICAL BRUSHES 61.......
CHECKING CYLINDERICAL BRUSH
PATTERN 63......................
ADJUSTING THE CYLINDERICAL BRUSH
WIDTH 64.........................
ADJUSTING THE CYLINDERICAL
BRUSH TAPER 64.................
SIDE BRUSH (OPTION) 65...............
REPLACING THE SIDE BRUSH 65.....
FaST SYSTEM 66.......................
REPLACING THE FaST−PAK CARTON 66
CLEANING THE FaST SUPPLY HOSE
CONNECTOR 67...................
CLEANING THE FaST SYSTEM
FILTER SCREEN 67................
CLEANING THE FaST SYSTEM AIR
PUMP FILTER (S/N 0000−0129) 67...
REPLACING THE FaST SYSTEM
FILTERS (S/N 0130−) 67......
ec−H2O MODULE FLUSH PROCEDURE 68
CLEANING THE ec−H2O FILTER
SCREEN 69..........................
SQUEEGEE BLADES 70.................
REPLACING (OR ROTATING) THE REAR
SQUEEGEE BLADES 70............
REPLACING OR ROTATING THE
SIDE SQUEEGEE BLADES 72.......
REPLACING THE SIDE BRUSH
SQUEEGEE BLADE (S/N 0000−0180)
(OPTION) 73....................
REPLACING OR ADJUSTING THE SIDE
BRUSH SQUEEGEE BLADE
(S/N 0181−) (OPTION) 74.....
LEVELING THE REAR SQUEEGEE 75..
ADJUSTING THE REAR SQUEEGEE
BLADE DEFLECTION 75............
SKIRTS AND SEALS 76..................
SCRUB HEAD SKIRT 76...............
RECOVERY TANK SEAL 76............
SOLUTION TANK SEALS 76...........
BRAKES AND TIRES 77..................
BRAKES 77..........................
TIRES 77............................
FRONT WHEEL 77....................
PROPELLING MOTOR 77................
PUSHING, TOWING, AND TRANSPORTING
THE MACHINE 78.....................
PUSHING OR TOWING THE MACHINE 78
TRANSPORTING THE MACHINE 78....
MACHINE JACKING 80...................
STORAGE INFORMATION 81.............
FREEZE PROTECTION (MACHINES
WITHOUT ec−H2O SYSTEM) 81.....
FREEZE PROTECTION (MACHINES
WITH ec−H2O SYSTEM) 81.........
PRIMING THE ec−H2O SYSTEM 83....
Page
SPECIFICATIONS 84.......................
GENERAL MACHINE
DIMENSIONS/CAPACITIES 84.........
GENERAL MACHINE PERFORMANCE 84..
HYDRAULIC SYSTEM 85.................
STEERING 85...........................
POWER TYPE 85........................
TIRES 86...............................
FaST SYSTEM 86.......................
ec−H2O SYSTEM 86.....................
MACHINE DIMENSIONS 87...............

SAFETY PRECAUTIONS
3
T20 Gas/LPG 331481 (3−2013)
IMPORTANT SAFETY INSTRUCTIONS −SAVE THESE INSTRUCTIONS
The following precautions are used throughout
this manual as indicated in their description:
WARNING: To warn of hazards or unsafe
practices that could result in severe
personal injury or death.
CAUTION: To warn of unsafe practices
that could result in minor or moderate
personal injury.
FOR SAFETY: To identify actions that must be
followed for safe operation of equipment.
The following information signals potentially
dangerous conditions to the operator. Know when
these conditions can exist. Locate all safety
devices on the machine. Report machine damage
or faulty operation immediately.
WARNING: Flammable materials can
cause an explosion or fire. Do not use
flammable materials in tank.
WARNING: Flammable materials or
reactive metals can cause an explosion
or fire. Do not pickup.
WARNING: Moving belt and fan. Keep
away.
WARNING: Engine emits toxic gases.
Serious injury or death can result.
Provide adequate ventilation.
WARNING: Burn hazard. Hot surface. Do
NOT touch.
WARNING: Machine can emit excessive
noise. Hearing loss can result. Wear
hearing protection.
CAUTION: LPG engine will run for a few
seconds after key is turned off. Apply
parking brake before leaving machine.
FOR SAFETY:
1. Do not operate machine:
−Unless trained and authorized.
−Unless operator manual is read and
understood.
−Under the influence of alcohol or
drugs.
−While using a cell phone or other
types of electronic devices.
−Unless mentally and physically
capable of following machine
instructions.
−If it is not in proper operating
condition.
−In areas where flammable
vapors/liquids or combustible dusts
are present.
−In areas that are too dark to safely see
the controls or operate the machine
unless operating / headlights are
turned on.
−In areas with possible falling objects
unless equipped with overhead guard.
2. Before starting machine:
−Check for fuel, oil, and liquid leaks.
−Keep sparks and open flame away
from refueling area.
−Make sure all safety devices are in
place and operate properly.
−Check brakes and steering for proper
operation.
3. When starting machine:
−Keep foot on brake and directional
pedal in neutral.

SAFETY PRECAUTIONS
T20 Gas/LPG 331481 (3−2013)
4
4. When using machine:
−Use only as described in this manual.
−Do not pick up burning or smoking
debris, such as cigarettes, matches, or
hot ashes.
−Use brakes to stop machine.
−Go slow on inclines and slippery
surfaces.
−Reduce speed when turning.
−Keep all parts of body inside operator
station while machine is moving.
−Use care when reversing machine.
−Move machine with care when hopper
is raised.
−Make sure adequate clearance is
available before raising hopper.
−Do not raise hopper when machine is
on an incline.
−Never allow children to play on or
around machine.
−Do not carry passengers on machine.
−Always follow safety and traffic rules.
−Report machine damage or faulty
operation immediately.
−Follow mixing, handling and disposal
instructions on chemical containers.
−Follow safety guidlines concerning
wet floors.
5. Before leaving or servicing machine:
−Do not park near combustible
materials, dusts, gases, or liquids.
−Stop on level surface.
−Set parking brake.
−Turn off machine and remove key.
6. When servicing machine:
−All work must be done with sufficient
lighting and visibility.
−Avoid moving parts. Do not wear loose
clothing, jewelry and secure long hair.
−Block machine tires before jacking
machine up.
−Avoid moving parts. Do not wear loose
jackets, shirts, or sleeves.
−Block machine tires before jacking
machine up.
−Jack machine up at designated
locations only. Support machine with
jack stands.
−Use hoist or jack that will support the
weight of the machine.
−Disconnect battery connections before
working on machine.
−Avoid contact with battery acid.
−Avoid contact with hot engine coolant.
−Do not remove cap from radiator when
engine is hot.
−Allow engine to cool.
−Keep flames and sparks away from
fuel system service area. Keep area
well ventilated.
−Use cardboard to locate leaking
hydraulic fluid under pressure.
−All repairs must be performed by a
trained service mechanic.
−Do not modify the machine from its
original design.
−Use Tennant supplied or approved
replacement parts.
−Wear personal protective equipment
as needed and where recommended in
this manual.
For Safety: wear hearing protection.
For Safety: wear protective gloves.
For Safety: wear eye protection.
For Safety: wear protective dust mask.
7. When loading/unloading machine
onto/off truck or trailer:
−Drain tanks before loading machine.
−Lower scrub head and squeegee
before tying down machine.
−Turn off machine and remove key.
−Use ramp, truck or trailer that will
support the weight of the machine and
operator.
−Turn off machine.
−Use truck or trailer that will support
the weight of the machine.
−Use winch. Do not drive the machine
onto/off the truck or trailer unless the
load height is 380 mm (15 in) or less
from the ground.
−Set parking brake after machine is
loaded.
−Block machine tires.
−Tie machine down to truck or trailer.

SAFETY PRECAUTIONS
5
T20 Gas/LPG 331481 (3−2013)
The following safety labels are mounted on the
machine in the locations indicated. If these or any
labels become damaged or illegible, install a new
label in its place.
10783
Located on the side
of the operator
compartment.
Located on the side
of the operator
compartment.
Located next to the ignition switch on
the instrument panel. (LPG machines
only)
WARNING LABEL −Machine emits
toxic gases. Serious injury or death
can result. Provide adequate
ventilation.
Located on the side of the operator
compartment.
FOR SAFETY LABEL −
Read manual before
operating machine.
CAUTION LABEL −LPG engine will
run for a few seconds after key is
turned off. Apply parking brake before
leaving machine.
WARNING LABEL −
Flammable materials
or reactive metals
can cause explosion.
Do not pick up.
Located on the side
of the operator
compartment.
WARNING LABEL −
Machine can emit
excessive noise. Hearing
loss can result. Wear
hearing protection.

SAFETY PRECAUTIONS
T20 Gas/LPG 331481 (3−2013)
6
Located on engine
compartment panel.
10783
Located next to the solution tank
covers and on the detergent tank.
Located on the side of the
bumper, on the exhaust shield,
and on the hydraulic reservoir.
WARNING LABEL −
Moving belt and fan.
Stay away.
WARNING LABEL −Flammable
materials can cause explosion or fire.
Do not use flammable materials in tank.
WARNING LABEL −
Burn hazard. Hot
surface. Do not touch.

OPERATION
7
T20 Gas/LPG 331481 (5−10)
OPERATION
MACHINE COMPONENTS
C
G
F
KB
S
A
E
D
L
R
T
I
M
U
H
N
P
V
J
O
Q
W
A. Overhead guard (option)
B. Instrument panel
C. Front shroud
D. Headlights
E. Side brush (option)
F. Side squeegee
G. Scrub head access door
H. Debris tray carriage release lever
I. Fuel tank
J. Seat shroud
K. FaST carton, or ES detergent tank
compartment (option), or ec−H2O System
Module compartment (option)
L. Solution tank cover
M. Operator seat
N. Spray wand −nozzle behind seat (option)
O. Flashing light (option)
P. Audible backup alarm (option)
Q. Recovery tank drain hose
R. Recovery tank cover
S. Solution tank drain hose
T. Debris tray carriage
U. Taillights
V. Rear squeegee
W. Engine cover

OPERATION
8T20 Gas/LPG 331481 (5−10)
CONTROLS AND INSTRUMENTS
B
I
F
E
G
KA
C
D
HJ
L
A. Steering wheel
B. Ignition switch
C. Horn button
D. Steering column tilt knob
E. Directional pedal
F. Brake pedal
G. Parking brake pedal
H. Touch panel
I. Operating / Hazard Lights switch
J. Spray nozzle switch (option)
K. Engine indicator lights
L. ec−H2O system indicator light (option)

OPERATION
9
T20 Gas/LPG 331481 (5−10)
TOUCH PANEL
C
B
E
FD
G
H
I
J
K
L
M
A
A. Fault indicator light
B. Hour meter / fuel indicator / fault code indicator
C. 1−STEP scrub button
D. Scrub vacuum fan / squeegee button
E. ES (Extended Scrub) button (option)
F. FaST button (option)
ec−H2O button (option)
G. Solution increase button (+)
H. Solution decrease button (−)
I. Brush pressure increase button (+)
J. Brush pressure decrease button (−)
K. Side brush button (option)
L. Engine speed button
M. Supervisor control buttons

OPERATION
10 T20 Gas/LPG 331481 (5−10)
SYMBOL DEFINITIONS
These symbols are usd on the machine to identify
controls, displays, and features.
Hazard light Main brush pressure
Operating lights Solution flow
Spray nozzle Increase
Fault indicator Decrease
Scrub vac fan/squeegee Charging system
1−STEP scrub Engine oil pressure (0000−0170)
ES (extended scrub) Engine oil pressure (0171−)
FaST (foam scrubbing) Check engine (0000−0170)
Engine speed Horn
Side brush Jack point
Unleaded fuel only Parking Brake (0171−)
ec−H2O (option)

OPERATION
11
T20 Gas/LPG 331481 (5−09)
OPERATION OF CONTROLS
CHARGING SYSTEM INDICATOR
The Charging system indicator comes on when
the alternator is not operating within the normal
range. If this indicator comes on, stop the
machine immediately and correct the problem.
ENGINE OIL PRESSURE INDICATOR
The Engine oil pressure indicator comes on when
the engine oil pressure falls below the normal
operating pressure. If this indicator comes on,
stop the machine immediately and correct the
problem.
CHECK ENGINE INDICATOR
The Check engine indicator comes on when the
engine control system detects a fault during
machine operation.
If this indicator comes on, contact a Tennant
service representative.
PARKING BRAKE INDICATOR
The parking brake indicator comes on when the
parking brake is engaged.

OPERATION
12 T20 Gas/LPG 331481 (1−07)
SETTING THE ENGINE SPEED
The engine speed is controlled automatically
when the 1−STEP Scrub button is pressed. When
not scrubbing, press the Engine Speed button to
increase the engine RPM for increased travel
speed. Press the Engine Speed button again to
reduce the engine RPM. The two lights above the
button indicate engine speed setting. When one
light is lit the engine is in the low setting. When
two lights are lit the engine is in the high setting.
SIDE BRUSH (OPTION)
The side brush allows users to scrub difficult to
reach corners and areas near walls. The side
brush also widens the scrubbing path.
With the 1−STEP Scrub button activated, press
the Side brush button to lower and start the side
brush. The light next to the button will come on.
When finished using the side brush, press the
button again to raise and stop the side brush. The
light next to the button will turn off. The machine
will default to the last setting used when it is
powered on or off.
FUEL INDICATOR
GASOLINE MACHINES
For gasoline machines, the Fuel indicator displays
the amount of fuel left in the tank. The fault
indicator will flash and a low fuel message will
appear when the tank is near empty.
NOTE: Do not use leaded fuels. Leaded fuels will
permanently damage the system oxygen sensor
and catalytic converter.
LPG MACHINES
For LPG machines, the Fuel indicator does NOT
display the amount of fuel in the LPG tank. It will
display all the indicator bars to show that some
fuel is in the tank. When the LPG tank is near
empty, the fault indicator will flash and a low fuel
message will appear.
The LPG fuel gauge on the tank displays the
amount of fuel in the LPG tank.

OPERATION
13
T20 Gas/LPG 331481 (1−07)
HOUR METER
The Hour meter records the hours the machine
was operated. Use this information to determine
machine service intervals.
SUPERVISOR CONTROL BUTTONS
The Supervisor Control buttons are for accessing
the configuration and diagnostic modes. Only
properly trained service personnel and TENNANT
representatives should access these modes.
OPERATING LIGHTS
Push the top of the Operating / hazard light switch
to turn on the headlights and taillights. Return the
light switch to the center position to turn off the
lights.
HAZARD LIGHT (OPTION)
Press the bottom of the Operating / hazard light
switch to turn on the hazard light, headlights, and
taillights. Return the light switch to the center
position to turn off the lights.

OPERATION
14 T20 Gas/LPG 331481 (1−07)
OPERATOR SEAT
The operator seat has three adjustments:
backrest angle, operator weight, and front to back.
The backrest adjustment knob adjusts the angle
of the backrest.
Increase angle: Turn the angle adjustment knob
counterclockwise.
Decrease angle: Turn the angle adjustment knob
clockwise.
The weight adjustment knob controls the firmness
of the operator seat.
Increase firmness: Turn the weight adjustment
knob clockwise.
Decrease firmness: Turn the weight adjustment
knob counterclockwise.
Use the gauge next to the weight adjustment knob
to help determine seat firmness for the operator.
The front−to−back adjustment lever adjusts the
seat position.
Adjust: Pull the lever out and slide the seat to the
desired position. Release the lever to lock the
seat into place.
SEAT BELTS
Always fasten and adjust the seat belts before
operating the machine.
STEERING COLUMN TILT KNOB
1. Pull the Steering column tilt knob and adjust
the steering column to the desired height.
2. Release the Steering column tilt handle.

OPERATION
15
T20 Gas/LPG 331481 (1−07)
BRAKE PEDAL
Press the Brake pedal to stop the machine.
PARKING BRAKE PEDAL
Press the Brake pedal down as far as possible
and use toe to lock the Parking brake pedal into
place. Press the Brake pedal to release the
parking brake. The Parking brake pedal will return
to the unlocked position.
DIRECTIONAL PEDAL
Press the top of the Directional pedal to move
forward and the bottom of the pedal to move
backward. The backup lights will come on when
the machine is in reverse. The pedal returns to the
neutral position when it is released.
NOTE: An audible alarm will sound and the
backup light will flash when backing the machine if
equipped with the optional backup alarm.
SQUEEGEE PROTECTORS (OPTION)
The rear and side squeegee protectors help
protect the rear squeegee from being damaged.
To engage the rear squeegee protector, pull the
pin, lower the protector bar, and reinsert the pin.

OPERATION
16 T20 Gas/LPG 331481 (5−10)
HOW THE MACHINE WORKS
This machine can effectively scrub dirty floors.
The 1−STEP Scrub button makes it possible to
immediately begin scrubbing by operating all the
scrubbing functions.
When in the conventional Scrub mode, a water
and detergent mixture is used to scrub the floor.
When in the optional FaST (Foam scrubbing)
mode, the FaST scrubbing system mixes the
FaST−PAK concentrate with a small amount of
water, creating a large volume of expanded wet
foam. The FaST system can be used with all
scrubbing applications.
When in the optional ES (Extended Scrub) mode,
the dirty solution in the recovery tank is filtered
through the ES system and returned to the
solution tank for reuse. Detergent is then injected
into the returned solution to revitalize the cleaning
capability of the solution.
When in the optional ec−H2O (electrically
converted water) mode, normal water passes
through a module where it is oxygenated and
charged with an electric current. The electrically
converted water changes into a blended acidic
and alkaline solution forming a neutral pH cleaner.
The converted water attacks the dirt, breaks it into
smaller particles, and pulls it off the floor surface
allowing the machine to easily scrub away the
suspended soil. The converted water then returns
to normal water in the recovery tank . The
ec−H2O system can be used with all double
scrubbing and heavy duty scrubbing applications.
BRUSH INFORMATION
For best results, use the correct brush type for the
cleaning application. Listed below are the brushes
and the applications for which each is best suited.
NOTE: The amount and type of soilage play an
important role in determining the type of brushes
to use. Contact a Tennant representative for
specific recommendations.
Nylon brush (Disk)* −Softer nylon bristles are
recommended for scrubbing coated floors. Cleans
without scuffing.
Polyester brush (Cylinderical) −Softer general
purpose polyester bristles gently clean while
scrubbing. Perfect for sensitive floor surfaces.
Polyester does not absorb water so it is preferred
over Nylon in wet applications.
PolyPro brush (Cylinderical) −Heavy duty
polypropylene bristles provide a more aggressive
cleaning performance and can more easily lift
compacted dirt, debris, and sand while offering
excellent scrubbing performance.
Polypropylene brush (Cylinderical and Disk)*
−General purpose polypropylene bristles lift lightly
compacted dirt without scuffing high-gloss coated
floors.
Super AB brush (Cylinderical and Disk)* −
Nylon fiber impregnated with abrasive grit to
remove stains and compacted dirt. Aggressive
action on any surface. Performs well on buildup,
grease, or tire marks.
*This brush is also available for the side brush.
Stripping pad −This brown pad is for stripping
floors. Quickly and easily cuts through old finish to
prepare the floor for recoating.
Scrubbing pad −This blue pad is for scrubbing
floors. Removes dirt, spills, and scuffs. Leaves a
clean surface ready for re-coating.
Buffing pad −This red pad is for buffing floors.
Quickly cleans and removes scuff marks while
polishing the floor to a high gloss.
Polishing pad −This white pad is for polishing
floors. Maintains a high gloss. Use for buffing very
soft finishes and lower traffic areas, and polishing
soft waxes on wood floors.

OPERATION
17
T20 Gas/LPG 331481 (3−2013)
High productivity pad −This black pad is for
aggressively stripping floor finishes/sealers or for
very heavy−duty scrubbing. This pad can only be
used with the grip pad driver, not the tufted pad
driver.
Surface preparation pad −This maroon pad is
for very aggressive floor stripping without
chemicals.
Grip pad driver −The grip−face backing allows
pads to be fully used and holds pads in place
without penetrating the pad. The spring−activated
centering device works with all Tennant pads and
allows for fast, easy pad replacement.
Tufted pad driver −Standard pad driver has
short bristles, or “tufts,” on the back to hold the
pad in place. This driver works with all Tennant
pads except the black high productivity pad.
WHILE OPERATING THE MACHINE
Pick up oversized debris before scrubbing. Pick
up wire, string, twine, large pieces of wood, or any
other debris that could become wrapped around
or tangled in the brushes.
Drive as straight a path as possible. Avoid
bumping into posts or scraping the sides of the
machine. Overlap the scrub/sweep paths by
several centimeters (a few inches).
Avoid turning the steering wheel too sharply when
the machine is in motion. The machine is very
responsive to the movement of the steering wheel.
Avoid sudden turns, except in emergencies.
Adjust the machine speed, brush pressure, and
solution flow as required when scrubbing. Use the
lowest brush pressure and solution flow settings
for best performance. If the machine is equipped
with the FaST or ec−H20 system, use the FaST
or ec−H20 system for the best scrubbing results.
Keep the machine moving to prevent damaging
floor finishes.
If poor cleaning performance is observed, stop
cleaning and refer to MACHINE
TROUBLESHOOTING in this manual.
Perform the Daily Maintenance Procedures after
each use (see MACHINE MAINTENANCE in this
manual).
Drive the machine slowly on inclines. Use the
brake pedal to control machine speed on
descending inclines. Scrub with the machine up
inclines rather than down inclines.
FOR SAFETY: When using machine, go slowly
on inclines and slippery surfaces.
Do not operate machine in areas where the
ambient temperature is above 43C (110F). Do
not operate scrubbing functions in areas where
the ambient temperature is below freezing 0C
(32F).
The maximum rated incline for scrubbing with the
machine is 10. The maximum rated incline during
transport of the machine is 14%.

OPERATION
18 T20 Gas/LPG 331481 (3−2013)
PRE−OPERATION CHECKLIST
Check the hydraulic fluid level.
Check the fuel level.
Check the machine for fluid leaks.
Check the condition of the main brushes.
Remove string, banding, plastic wrap, or other
debris wrapped around the brushes.
Cylinderical brushes: Check that the debris
tray is empty and clean.
Check the main brush compartment right
skirts, seals, and squeegee for damage and
wear.
Side Brush Option: Check the condition of the
brush. Remove string, banding, plastic wrap,
or other debris wrapped around the brush.
Side Brush Option: Check the condition of the
side brush squeegee.
Check the radiator and hydraulic cooler fins
for debris.
Check the engine coolant level.
Check the engine oil level.
Check the main brush compartment left skirts,
seals, and squeegee for damage and wear.
Check the left solution tank cover seal for
damage and wear.
Check the recovery tank cover seal for
damage and wear.
Clean the vacuum fan debris filter.
Drain and clean the recovery tank.
ES Option: Drain and clean the solution tank,
float sensor, and ES filter.
Check the right solution tank cover seal for
damage and wear.
Clean the hopper and the debris screen.
Check the squeegee hose for debris or
blockage.
Check the squeegees for damage, wear, and
deflection adjustment.
FaST Scrubbing: Check the FaST−PAK
concentrate agent level. Replace carton as
needed. See the INSTALLING THE
FaST−PAK CARTON section of the manual.
FaST Scrubbing: Ensure all conventional
cleaning agents are drained and rinsed from
the solution tank.
FaST Scrubbing: Ensure the solution tank is
filled with clear cool water only.
Check the horn, headlights, taillights, safety
lights, and backup alarm (if equipped).
Check the brakes and steering for proper
operation.
Check the service records to determine
maintenance requirements.