Tennant EC H2O M20 User manual

M2
0
*331410*
33141
0
Rev. 13 (9-2014
)
(Diese
l)
Scrubber−Sweepe
r
Operator Manua
l
North America / International
The Safe Scrubbing AlternativeR
ESRExtended Scrub System
TennantTrueRParts
HygenicRFully Cleanable Tanks
FloorSmartRIntegrated Cleaning System
IRISRa Tennant Technology
R
For the latest parts manuals and other
language Operator manuals, 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 M20 is an industrial rider machine designed to sweep/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 Company
PO Box 1452
Minneapolis, MN 55440
Phone: (800) 553−8033 or (763) 513−2850
www.tennantco.com
CALIFORNIA PROPOSITION 65 WARNING:
Engine exhaust from this product contains chemicals known to the State of California to cause cancer,
birth defects, or other reproductive harm.
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.
Specifications and parts are subject to change without notice.
Original Instructions, copyright 2006 − 2014 TENNANT Company, Printed in U.S.A.

CONTENTS
1
M20 Diesel 331410 (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
(S/N 000000−002885) 11............
Glow Plug Light (Preheat) 11............
Parking Brake Indicator (Option) 11......
Setting The Engine Speed 12...........
Side Brush (Option) 12.................
Fuel Indicator 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 17.....................
While Operating The Machine 17...........
Pre−Operation Checklist 18................
Starting The Machine 19..................
Turning Off The Machine 19...............
Filling The Solution Tank 20................
Foam Scrubbing (FaST Mode) / Ec−H2o
Scrubbing (Ec−H2o Mode) 20...........
Conventional Scrubbing Mode 20...........
Es (Extended Scrub) Mode With Auto−Fill 21
Es (Extended Scrub) Mode −
Manually Filling Tanks 21...............
Setting Scrub Modes 22...................
Setting FaST Mode 22.................
Setting Es (Extended Scrub) Mode 22....
Setting Ec−H2o Mode 22...............
Setting Brush Pressure 22..............
Setting Solution Flow 23................
Conventional, FaST, And Ec−H2o
Solution Flow 23....................
Es (Extended Scrub) Solution Flow 23...
Scrubbing 24.............................
Double Scrubbing 25.....................
Water Pickup Mode (No Scrubbing) 26......
Sweeping 26.............................
Emptying The Hopper 28..................
Page
Engaging Hopper Support Pin 29...........
Disengaging Hopper Support Pin 29........
Removing The Hopper Dust Filter 30........
Cleaning The Hopper And Debris Screen 31.
Draining And Cleaning The Recovery Tank 32
Draining The Recovery Tank With
The Drain Hose 32....................
Draining The Recovery Tank With
The Drain Plug 34.....................
Draining And Cleaning The Solution Tank 35.
Fault Indicator(S) 37......................
Conditions / Warnings 38..................
Options 39..............................
Spray Nozzle (Option) 39...............
Vacuum Wand (Option) 40..............
Machine Troubleshooting 41...............
Maintenance 43.............................
Maintenance Chart 44....................
Lubrication 46...........................
Engine Oil 46............................
Squeegee Caster Bearings 46.............
Front Wheel Support Bearing 46...........
Steering Cylinder Bearing 46...............
Hopper Lift Arm Pivots 47.................
Hopper Door Pivots 47....................
Lift Arm Latch 47.........................
Torque Tubes 47.........................
Hydraulics 48............................
Hydraulic Fluid 49.....................
Hydraulic Hoses 49....................
Engine 50...............................
Cooling System 50....................
Air Filter 51...........................
Fuel Filter 51.........................
Fuel Lines 51.........................
Priming The Fuel System 52............
Engine Belt 52........................
Battery 52...............................
Fuses, Relays, And Circuit Breakers 53.....
Relay Panel Fuses And Relays 53..........
Engine Harness Fuses And Relays 54......
Circuit Breakers (Ec−H2o) 54..............
Cleaning The Hopper Dust Filter 54.........
Thermo−Sentry 55.......................
Main Brushes 55.........................
Replacing Or Rotating The Main
Brushes 55........................
Checking The Main Brush Pattern 57....
Adjusting The Main Brush Taper 58......
Adjusting The Main Brush Width 58......
Side Brush (Option) 59....................
Replacing The Side Brush 59...........

CONTENTS
M20 Diesel 331410 (3−2013)
2
Page
FaST System 60..........................
Replacing The FaST−Pak Carton 60.....
Cleaning The FaST Supply Hose
Connector 61......................
Cleaning The FaST System
Filter Screen 61.....................
Cleaning The FaST System Air Pump
Filter (S/N 000000 − 002532) 61......
Replacing The FaST System Filters
(S/N 002533− ) 61.............
Ec−H2o Module Flush Procedure 62........
Cleaning The Ec−H2o Filter Screen 63...
Squeegee Blades 64......................
Replacing (Or Rotating) The Rear
Squeegee Blades 64................
Replacing Or Rotating The Side
Squeegee Blades 66................
Replacing The Side Brush Squeegee
Blade (S/N 000000−003076) (Option) 68
Replacing Or Adjusting The Side Brush
Squeegee Blade (S/N 003077− )
(Option) 69.....................
Leveling The Rear Squeegee 70.........
Adjusting The Rear Squeegee Blade
Deflection 71.......................
Skirts And Seals 72.......................
Scrub Head Skirt 72......................
Recovery Tank Seal 72...................
Solution Tank Seals 72....................
Brakes And Tires 73......................
Brakes 73............................
Tires 73...............................
Front Wheel 73.......................
Propelling Motor 73.......................
Pushing, Towing, And Transporting
The Machine 74.......................
Pushing Or Towing The Machine 74......
Transporting The Machine 74...........
Machine Jacking 76......................
Storage Information 76....................
Freeze Protection (Machines Without
Ec−H2o System) 77................
Freeze Protection (Machines With
Ec−H2o System) 77................
Priming The Ec−H2o System 79.........
Specifications 80.............................
General Machine Dimensions/Capacities 80.
General Machine Performance 80..........
Hydraulic System 80......................
Steering 81..............................
Power Type 81............................
Tires 81..................................
FaST System 82..........................
Ec−H2o System 82.......................
Machine Dimensions 83...................
Index 84...................................

SAFETY PRECAUTIONS
3
M20 Diesel 331410 (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: Raised hopper may fall.
Engage hopper support pin.
WARNING: Lift arm pinch point. Stay
clear of hopper lift arms.
WARNING: Burn hazard. Hot surface. Do
NOT touch.
CALIFORNIA PROPOSITION 65
WARNING: Engine exhaust from this
product contains chemicals known to
the State of California to cause cancer,
birth defects, or other reproductive
harm.
This machine may be equiped 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.
− 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 machine for fluid 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
M20 Diesel 331410 (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.
− 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 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.
− Empty debris hopper before loading
machine.
− Turn off machine and remove key.
− Use ramp, truck or trailer that will
support the weight of the machine and
operator.
− 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
M20 Diesel 331410 (9−06)
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.
EMISSIONS LABEL − Located on the
side of the operator compartment.
FOR SAFETY LABEL −
Located on the side of the
operator compartment.
FLAMMABLE SPILLS LABEL −
Located on the side of the
operator compartment.
HOPPER LIFT ARMS LABEL −
Located on both hopper lift arms.

SAFETY PRECAUTIONS
M20 Diesel 331410 (3−07)
6
FAN AND BELT LABEL −
Located on engine
compartment panel.
FLAMMABLE MATERIALS
LABEL − Located next to
the solution tank covers
and on the detergent tank.
HOT SURFACE LABEL − Located on
the side of the bumper, on the
exhaust shield, and on the hydraulic
reservoir.
RAISED HOPPER LABEL − Located
on both hopper lift arms.

OPERATION
7
M20 Diesel 331410 (4−10)
OPERATION
MACHINE COMPONENTS
C
F
IJ
B
A
E
H
N
O
P
D
K
Q
R
T
G
LM
S
A. Instrument panel
B. Front shroud
C. Headlights
D. Side brush (option)
E. Side squeegee
F. Scrub head access door
G. Fuel tank
H. Seat shroud
I. FaST carton, or ES detergent tank
compartment, or ec−H2O System Module
compartment (option)
J. Solution tank cover
K. Operator seat
L. Audible backup alarm (option)
M. Taillights
N. Recovery tank drain hose
O. Recovery tank cover
P. Solution tank drain hose
Q. Hopper
R. Rear squeegee
S. Hopper safety pin
T. Engine cover

OPERATION
8M20 Diesel 331410 (4−10)
CONTROLS AND INSTRUMENTS
B
I
H
FE
LM
G
KA
C
D
J
N
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. Hopper door open / close switch
I. Hopper raise / lower switch
J. Touch panel
K. Operating / Hazard Lights switch
L. Spray nozzle switch (option)
M. Engine indicator lights
N. ec−H2O system indicator light (option)

OPERATION
9
M20 Diesel 331410 (4−10)
TOUCH PANEL
H
C
G
A
N
JE
B
D
F
I
K
LM
O
P
A. Fault indicator light
B. Hour meter / fuel indicator / fault code
indicator
C. 1−STEP sweep button
D. 1−STEP scrub button
E. Scrub vacuum fan / squeegee button
F. ES (Extended Scrub) button (option)
G. FaST button (option)
ec−H2O button (option)
H. Solution increase button (+)
I. Solution decrease button (−)
J. Brush pressure increase button (+)
K. Brush pressure decrease button (−)
L. Filter shaker button
M. Sweep vacuum fan button
N. Side brush button (option)
O. Engine speed button
P. Supervisor control buttons

OPERATION
10 M20 Diesel 331410 (4−10)
SYMBOL DEFINITIONS
These symbols are usd on the machine to identify
controls, displays, and features.
Hazard light Engine speed
Operating lights Side brush
Spray nozzle Main brush pressure
Hopper door open Solution flow
Hopper door close Increase
Hopper raise Decrease
Hopper lower Charging system
Fault indicator Engine oil pressure (000000−002885)
Filter shaker Engine oil pressure (002886− )
Sweep vac fan Glow plugs (preheat − diesel only)
Scrub vac fan/squeegee Horn
1−STEP sweep Jack point
1−STEP scrub Diesel fuel only
ES (extended scrub) Parking Brake (002886− )
FaST (foam scrubbing) Check engine (000000−002885)
ec−H2O (option)

OPERATION
11
M20 Diesel 331410 (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
(S/N 000000−002885)
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.
GLOW PLUG LIGHT (PREHEAT)
The Glow plug light comes on when the igntition
switch is turned counterclockwise to the preheat
position. The light will stay on when the key is
held in this position.
PARKING BRAKE INDICATOR (OPTION)
The parking brake indicator comes on when the
parking brake is engaged.

OPERATION
12 M20 Diesel 331410 (9−06)
SETTING THE ENGINE SPEED
The engine speed is controlled automatically
when either the 1−STEP Scrub button or 1−STEP
Sweep button is pressed. When not sweeping or
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 sweep or scrub
difficult to reach corners and areas near walls.
The side brush also widens the scrubbing/
sweeping path.
With the 1−STEP Scrub button or 1−STEP Sweep
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
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.

OPERATION
13
M20 Diesel 331410 (9−06)
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 M20 Diesel 331410 (9−06)
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
M20 Diesel 331410 (9−06)
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 M20 Diesel 331410 (3−2013)
HOW THE MACHINE WORKS
This machine can effectively scrub or sweep dirty
floors. The 1−STEP Scrub button and 1−STEP
Sweep button make it possible to immediately
begin scrubbing or sweeping.
The 1−STEP Sweep button operates all the dry
sweeping functions (without scrubbing). The
1−STEP Scrub button operates all the scrubbing
functions. (The machine also sweeps while
scrubbing).
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
double scrubbing and heavy duty 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.

OPERATION
17
M20 Diesel 331410 (3−2013)
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.
PolyPro brush − 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 − General purpose
polypropylene bristles lift lightly compacted dirt
without scuffing high-gloss coated floors.
Polyester brush − Softer general purpose
polyester bristles lift light debris while sweeping
and gently clean while scrubbing. Perfect for
sensitive floor surfaces. Polyester does not
absorb water so it is preferred over Nylon in wet
applications.
Super AB brush − 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.
WHILE OPERATING THE MACHINE
Pick up oversized debris before scrubbing or
sweeping. 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−H2O system, use the FaST
or ec−H2O 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 14%. The maximum rated incline
during transport of the machine is 18%.

OPERATION
18 M20 Diesel 331410 (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.
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 skirt or 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.
Check the condition of the hopper dust filter
and seals.
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 headlights, taillights, and safety
lights.
Check the brakes and steering for proper
operation.
Check the service records to determine
maintenance requirements.