Tennant T20 LPG Operating and installation instructions

T20
(S/N 008000- )
Rider Scrubber
English EN
Service Information Manual
9016205
Rev. 00 (5-2017)
*9016205*
For the latest Parts Manuals and other
language Operator Manuals, visit:
www.tennantco.com/manuals
The Safe Scrubbing Alternative®
ES®Extended Scrub System
Tennant True®Parts
Hygenic®Fully Cleanable tanks
FloorSmart®Integrated Cleaning system
IRIS®a Tennant Technology
Pro-Panel™ Controls
Insta-Fit™ Adapter

INTRODUCTION
This manual is available for 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
and used machine components such as
batteries in an environmentally safe way
according to your local waste disposal
regulations.
Always remember to recycle.
Tennant Company
PO Box 1452
Minneapolis, MN 55440
Phone: [phone]
www.tennantco.com
PerformanceView, Pro−ID, Pro−Check, Zone Settings, Thermo−
Sentry, Touch−N−Go, 1−STEP, Clean−Wedge, Variable Drain
Valve, EasyOpen, Grip−n−Go, MaxPro, Dura−Track, SmartRelease,
InstantAccess, Duramer, FaST−PAK, ErgoSpace, and Lower Total
Cost of Ownership are trademarks of Tennant Company.
Specications and parts are subject to change without notice.
Original Instructions. Copyright © 2017 Tennant Company. All rights
reserved.
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, trans-
portation terminals, and construction sites. Do not use
this machine on soil, grass, artificial turf, or carpeted
surfaces. Do not use where excessive debris is present
such as leaves, paper, etc. This machine can be used
both indoors and outdoors, but ensure there is ad-
equate ventilation if used indoors. This machine is not
intended for use on public roadways. Do not use this
machine other than described in this Manual.
MACHINE DATA
Please ll out at time of installation for future reference.
Model No. - _________________________________________
Serial No. - _________________________________________
Installation Date - ____________________________________
SERIAL NUMBER LOCATION

3
T20 Service Information (5-2017)
CONTENTS
CONTENTS
INTRODUCTION...................................................2
INTENDED USE....................................................2
MACHINE DATA....................................................2
SERIAL NUMBER LOCATION........................2
CONTENTS...........................................................3
SAFETY PRECAUTIONS......................................6
GENERAL INFORMATION..................................10
ELECTRICAL COMPONENT LOCATOR......10
HYDRAULIC COMPONENT LOCATOR.......19
SPECIFICATIONS ........................................27
MAINTENANCE ..................................................31
MAINTENANCE CHART...............................32
YELLOW TOUCH POINTS ...........................35
LUBRICATION ..............................................35
ENGINE OIL.............................................35
SQUEEGEE CASTER BEARING ............35
FRONT WHEEL SUPPORT BEARING....35
STEERING CYLINDER BEARING ........35
REAR WHEEL BEARINGS ......................36
TORQUE TUBES−CYLINDRICAL
BRUSHES...........................................36
TORQUE TUBES−DISK BRUSHES ........36
PIVOT SHAFT−DISK BRUSHES.............36
HYDRAULICS ..............................................37
HYDRAULIC FLUID . ...............................38
HYDRAULIC HOSES ..............................38
ENGINE - GAS/LPG .....................................39
COOLING SYSTEM ................................39
AIR FILTER .............................................40
FUEL FILTER (LPG) ................................40
LPG VAPORIZER ....................................40
FUEL FILTER (GASOLINE) .....................40
ENGINE BELT .........................................41
PCV SYSTEM .........................................41
SPARK PLUGS −
MITSUBISHI ENGINES ......................41
CAMSHAFT AND BALANCE SHAFT
BELTS −MITSUBISHI ENGINES .......41
ENGINE - DIESEL ........................................42
COOLING SYSTEM ................................42
AIR FILTER .............................................43
FUEL FILTER ...........................................43
FUEL LINES.............................................43
PRIMING THE FUEL SYSTEM................44
ENGINE BELT .........................................44
BATTERY .....................................................44
FUSES AND RELAYS...................................45
RELAY PANEL FUSES AND RELAYS .....45
ENGINE HARNESS FUSES
AND RELAYS .....................................46
OPTIONAL RELAYS ...............................46
CIRCUIT BREAKERS (EC−H2O) ............46
SCRUB BRUSHES AND PADS ...................46
DISK BRUSHES ...........................................46
REPLACING DISK BRUSHES OR PAD
DRIVER ..............................................47
REPLACING DISK PADS .......................47
CHECKING THE DISK SCRUB HEAD
STOP BUMPERS ...............................48
CYLINDRICAL BRUSHES ............................49
REPLACING OR ROTATING
CYLINDRICAL BRUSHES ..................49
CHECKING CYLINDRICAL
BRUSH PATTERN ..............................50
ADJUSTING THE CYLINDRICAL
BRUSH TAPER ..................................51
ADJUSTING THE CYLINDRICAL
BRUSH WIDTH...................................51
SIDE BRUSH (OPTION) ..............................52
REPLACING THE SIDE BRUSH .............52
FAST SYSTEM .............................................53
REPLACING THE FAST−PAK CARTON .53
CLEANING THE FAST SUPPLY HOSE
CONNECTOR .....................................54
CLEANING THE FAST SYSTEM FILTER
SCREEN .............................................54
REPLACING THE FAST SYSTEM .....................
FILTERS..............................................54
EC−H2O MODULE FLUSH
PROCEDURE.........................................55
CLEANING THE EC−H2O
FILTER SCREEN ...................................56
SQUEEGEE BLADES...................................57
REPLACING (OR ROTATING) THE REAR
SQUEEGEE BLADES ........................57
REPLACING OR ROTATING THE SIDE
SQUEEGEE BLADES.........................59
REPLACING OR ADJUSTING THE SIDE
BRUSH SQUEEGEE BLADE
(OPTION) ............................................61
LEVELING THE REAR SQUEEGEE .......62
ADJUSTING THE REAR SQUEEGEE
BLADE DEFLECTION.........................63
SKIRTS AND SEALS ....................................64

4T20 Service Information (5-2017)
CONTENTS
SCRUB HEAD SKIRT ..............................64
RECOVERY TANK SEAL ........................64
SOLUTION TANK SEALS .......................64
BRAKES AND TIRES....................................65
BRAKES...................................................65
TIRES.......................................................65
FRONT WHEEL ......................................65
PROPELLING MOTOR.................................65
PUSHING, TOWING, AND TRANSPORTING
THE MACHINE.......................................66
PUSHING OR TOWING THE
MACHINE............................................66
TRANSPORTING THE MACHINE ...........66
MACHINE JACKING.....................................68
STORAGE INFORMATION...........................68
FREEZE PROTECTION (MACHINES
WITHOUT EC−H2O SYSTEM) ..........69
FREEZE PROTECTION (MACHINES
WITH EC−H2O SYSTEM) ..................69
PRIMING THE EC−H2O SYSTEM ..........71
ELECTRICAL TROUBLESHOOTING .................72
SCHEMATIC SYMBOLS...............................73
MACHINE ELECTRICAL SCHEMATIC ........74
DIESEL ENGINE HARNESS ELECTRICAL
SCHEMATIC...........................................81
GAS ENGINE HARNESS ELECTRICAL
SCHEMATIC...........................................82
LPG ENGINE HARNESS ELECTRICAL
SCHEMATIC...........................................84
T20 OPTION COMPONENTS ......................87
KEY SWITCH................................................88
MAIN BRUSHES ON ....................................91
SCRUB VACUUM ON AND
SQUEEGEE DOWN ...............................92
SIDE BRUSH ON..........................................93
TANK LEVEL SWITCHES.............................94
AUTO-FILL SOLENOID ................................95
CONVENTIONAL DETERGENT PUMP
AND ES PUMP.......................................96
HORN ...........................................................97
REVERSE PROPEL .....................................98
SHUTDOWN RELAY ....................................99
STARTING SYSTEM ON ............................103
GLOW PLUGS ON .....................................105
CONVENTIONAL MAIN AND SIDE BRUSH
SOLUTION VALVES.............................106
FAST SYSTEM ON.....................................107
FUEL LEVEL SENSORS ............................108
IMPACT, HYDRAULIC TEMP AND FILTER
SENSOR ..............................................109
OIL PRESSURE, TEMPERATURE, AND MIL
SYSTEM...............................................110
FUEL PUMP AND ENGINE SPEED
CONTROL ............................................112
KEY ON POWER DISTRIBUTION..............115
KEY OFF POWER DISTRIBUTION............116
HORN .........................................................117
ENABLE/DISABLE CHART ........................118
CONTROL BOARD CONNECTORS (P1) ..119
CONTROL BOARD CONNECTORS (P2) ..120
FAULT INDICATORS ..................................121
CONDITION AND WARNING
INDICATORS........................................122
HYDRAULIC TROUBLE SHOOTING................123
HYDRAULIC SCHEMATIC SYMBOLS.......124
HYDRAULIC SCHEMATIC .........................126
OPERATING MATRIX.................................128
OPTION COMPONENTS ...........................129
HOSE GROUP: STEERING AND
PROPEL ...............................................130
HOSE GROUP: PUMP AND VAC FAN.......131
HOSE GROUP: CYLINDRICAL BRUSH ....132
HOSE GROUP: DISK BRUSH....................133
HOSE GROUP: SQUEEGEE LIFT .............134
SCRUB HEAD LOWER ..............................135
SCRUB HEAD LIFT ....................................136
SQUEEGEE LOWER..................................137
SQUEEGEE LIFT........................................138
MAIN BRUSH ON (CYLINDRICAL)............139
MAIN BRUSH ON (DISK) ...........................140
SIDE BRUSH ON........................................141
SCRUB VACUUM FAN ON.........................142
SCRUB VACUUM FAN AND
SIDE BRUSH ON .................................143
SIDE BRUSH LOWER................................144
SIDE BRUSH LIFT......................................145
SIDE BRUSH EXTEND ..............................146
SIDE BRUSH RETRACT ............................147
HYDRAULIC SOLENOID VALVE
DETAILS...............................................148
SERVICE...........................................................149
PRO-PANEL SERVICE MODES.................149
SERVICE MODE....................................149
MANUAL MODE.....................................150
CONFIGURATION MODE .....................151
SELF TEST MODE ................................152
INPUT DISPLAY MODE.........................153
THROTTLE ADJUST MODE..................154

5
T20 Service Information (5-2017)
CONTENTS
DOWN PRESSURE ADJUST MODE ....155
MEMBRANE TEST MODE.....................157
MEMBRANE PANEL SERVICE MODES....158
SERVICE MODE....................................158
MANUAL MODE.....................................159
CONFIGURATION MODE .....................160
SELF TEST MODE ................................161
INPUT DISPLAY MODE.........................163
THROTTLE ADJUST MODE..................164
DOWN PRESSURE ADJUST MODE ....165
MEMBRANE TEST MODE.....................167
FRONT TIRE AND WHEEL SUPPORT ......168
REPLACE FRONT DRIVE WHEEL .......168

6T20 Service Information (5-2017)
SAFETY PRECAUTIONS
SAFETY PRECAUTIONS
SAFETY PRECAUTIONS
T20 Gas/LPG 9016200 (08−2016)
4
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.
CAUTION: LPG engine will run for a
few seconds after key is turned off.
Apply parking brake before leaving
machine.
WARNING: Do not spray people or
animals. Severe personal injury can
result. Wear eye protection. Hold
sprayer with two hands.
WARNING: This machine contains
chemicals known to the State of
California to cause cancer, birth defects,
or other reproductive harm.
This machine may be equipped with
technology that automatically communicates
over the cellular network. If this machine will
be operated where cell phone use is restricted
because of concerns related to equipment
interference, please contact a Tennant
representative for information on how to
disable the cellular communication
functionality.
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.
−In dusty environments without the
vacuum fan on.
−Without filters in place or with clogged
filters.
−Unless mentally and physically
capable of following machine
instructions.
−If it is not in proper operating
condition.
−With pads or accessories not supplied
or approved by Tennant. The use of
other pads may impair safety.
−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.
−Adjust seat and fasten seat belt.
3. When starting machine:
−Keep foot on brake and directional
pedal in neutral.
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SAFETY PRECAUTIONS
7
T20 Service Information (5-2017)
SAFETY PRECAUTIONS
5
T20 Gas/LPG 9016200 (08−2016)
4. When using machine:
−Use only as described in this manual.
−Use brakes to stop machine.
−Do not pick up burning or smoking
debris, such as cigarettes, matches or
hot ashes
−Go slowly on inclines and slippery
surfaces.
−Do not scrub on ramp inclines that
exceed 10% grade or transport
(GVWR) on ramp inclines that exceed
14% grade.
−Reduce speed when turning.
−Keep all parts of body inside operator
station while machine is moving.
−Always be aware of surroundings
while operating machine.
−Do not access the video / help screens
while the machine is moving.
(Pro−Panel).
−Use care when reversing machine.
−Keep children and unauthorized
persons away from 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.
−Keep work area well ventilated.
−Avoid moving parts. Do not wear loose
clothing, jewelry and secure long hair.
−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.
−Do not push or tow the machine
without an operator in the seat
controlling the machine.
−Do not power spray or hose off
machine near electrical components.
−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.
−Do not load/unload on ramp inclines
that exceed 18% grade.
−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.
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8T20 Service Information (5-2017)
SAFETY PRECAUTIONS
SAFETY PRECAUTIONS
T20 Gas/LPG 9016200 (08−2016)
6
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.
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)
Located on frame of
machine.
WARNING LABEL −
Flammable materials or
reactive metals can cause
explosion or fire. Do not
pick up.
WARNING LABEL −Do
not spray people or
animals. Severe personal
injury can result. Wear
eye protection. Hold
sprayer with both hands.
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.
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SAFETY PRECAUTIONS
9
T20 Service Information (5-2017)
SAFETY PRECAUTIONS
7
T20 Gas/LPG 9016200 (08−2016)
Located on the side of the bumper, on the
exhaust shield, on the hydraulic reservoir, and
on the scrub head (disk head machines only).
Located on engine
compartment panel.
Located on the side of the operator
compartment.
WARNING LABEL −Machine emits toxic
gases. Serious injury or death can result.
Provide adequate ventilation.
WARNING LABEL −Flammable materials can
cause explosion or fire. Do not use flammable
materials in tank.
Located next to the solution tank covers
and on the detergent tank.
WARNING LABEL −Burn hazard. Hot
surface. Do NOT touch
WARNING LABEL −
Moving belt and fan.
Keep away.
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10 T20 Service Information (5-2017)
GENERAL INFORMATION
GENERAL INFORMATION
ELECTRICAL COMPONENT LOCATOR
T20 Electrical Component Locator
Page 1 of 10
VALVESOL‐7

T20 Service Information (5-2017) 11
GENERAL INFORMATION
T20 Electrical Component Locator
Page 2 of 10
HORNSWITCHS‐22
IGNITIONSWITCHS‐1
LIGHTSWITCHS‐4
SPRAYNOZZLE
SWITCHS‐25
ACCESSPANELFOR
RIGHTSIDEofENGINE
ACCESSPANELREMOVED

12 T20 Service Information (5-2017)
GENERAL INFORMATION
T20 Electrical Component Locator
Page 3 of 10

T20 Service Information (5-2017) 13
GENERAL INFORMATION
T20 Electrical Component Locator
Page 4 of 10

14 T20 Service Information (5-2017)
GENERAL INFORMATION
FaST COMPONENTS
GAS/DIESEL FUEL LEVEL SENDER S-7
HYDRAULIC FILTER CLOGGED SWITCH S-17
HYDRAULIC OIL TEMPERATURE
SENSOR S-20 (BACK SIDE)
FRONT
TOP VIEW
FRONT
GAS/LPG ENGINE
DIAGNOSTIC CONNECTOR
T20 Electrical Component Locator
Page 5 of 10

T20 Service Information (5-2017) 15
GENERAL INFORMATION
AUTO FILL SOLENOID VALVES
FRONT
SOL-1
ES PUMP
INNER VIEW
SOL-2
TOP VIEW
INSIDE TANK
SPRAY NOZZLE/WAND PUMP
RECOVERY TANK FULL SWITCH S-15
RECOVERY TANK HALF
FULL SWITCH S-16
OUTSIDE TANK
T20 Electrical Component Locator
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16 T20 Service Information (5-2017)
GENERAL INFORMATION
Crankshaft
Position
Sensor
Coolant
Temperature
Sensor
Oil
Pressure
Switch
Diesel Engine
T20 Electrical Component Locator
Page 7 of 10

T20 Service Information (5-2017) 17
GENERAL INFORMATION
T20 Electrical Component Locator
Page 9 of 10
GAS/LPG

18 T20 Service Information (5-2017)
GENERAL INFORMATION
T20 Electrical Component Locator
Page 10 of 10
GAS/LPG

T20 Service Information (5-2017) 19
GENERAL INFORMATION
HYDRAULIC COMPONENT LOCATOR
VACUUM FAN MOTOR
CYLINDRICAL MAIN BRUSH
MOTOR (REAR)
FRONT
SIDE BRUSH MOTOR
LEFT SIDE SQUEEGEE LIFT CYLINDER
PROPEL MOTOR
T20 Hydraulic Component Locator
Page 1 of 8

20 T20 Service Information (5-2017)
GENERAL INFORMATION
DISK MAIN BRUSH MOTORS
LEFT SIDE SQUEEGEE LIFT CYLINDER
VACUUM FAN MOTOR
SIDE BRUSH MOTOR
PROPEL MOTOR
T20 Hydraulic Component Locator
Page 2 of 8