Tennant 7400 User manual

7400
MM425
Rev. 10
Operator Manual
*mm425*
Factory Cleaning Equipment, Inc.
800.793.3790
www.thesweeper.com

This manual is furnished with each new TENNANT Model 7400. It provides necessary operating and
preventive 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:
DThe machine is operated with reasonable care.
DThe machine is maintained regularly -- per the maintenance instructions provided.
DThe machine is maintained with TENNANT supplied or approved parts.
Manual Number -- MM425
Revision: 10
Published: 12--02
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.
Copyright E1996, 1997, 1998, 1999, 2000, 2001, 2002 TENNANT, Printed in U.S.A.
Factory Cleaning Equipment, Inc.
800.793.3790
www.thesweeper.com

CONTENTS
1
7400 MM425 (6--00)
CONTENTS
Page
SAFETY PRECAUTIONS 3...................
OPERATION 7..............................
OPERATOR RESPONSIBILITY 7...........
MACHINE COMPONENTS 8...............
SYMBOL DEFINITIONS 9..................
CONTROLS AND INSTRUMENTS 10.......
OPERATION OF CONTROLS 11...........
DIRECTIONAL PEDAL 11...............
BRAKE PEDAL 12.....................
PARKING BRAKE PEDAL 12............
CHARGING SYSTEM LIGHT 12.........
ENGINE OIL PRESSURE LIGHT 13......
ENGINE WATER TEMPERATURE
LIGHT 13...........................
MAINTENANCE MODE LIGHT 13........
RECOVERY TANK FULL LIGHT 14......
FUEL LEVEL LIGHT 14.................
OK LIGHT 14..........................
FUEL LEVEL GAUGE 15................
HOURMETER 15......................
EStSWITCH (OPTION) 16.............
SIDE BRUSH SWITCH (OPTION) 16.....
SQUEEGEE SWITCH 17................
DETERGENT FLOW SWITCH
(OPTION) 18.......................
SCRUB SWITCH 18....................
ENGINE SPEED SWITCH 19............
STEERING WHEEL 19.................
COVER RELEASE KNOB 19............
HORN BUTTON 20.....................
IGNITION SWITCH 20..................
STEERING COLUMN TILT HANDLE 20...
CIRCUIT BREAKERS 21................
SOLUTION FLOW SWITCH 22..........
ENGINE CHOKE KNOB 22..............
OPERATOR SEAT 23...................
SOLUTION TANK DRAIN HOSE 23......
RECOVERY TANK DRAIN HOSE 23.....
LATCHES 24..........................
HOW THE MACHINE WORKS 24...........
PRE-OPERATION CHECKLIST 25..........
CHANGING AN LPG FUEL TANK 27........
STARTING THE MACHINE 29..............
SCRUBBING AND BRUSH INFORMATION 31
FILLING THE TANKS 32...................
SCRUBBING 34..........................
DOUBLE SCRUBBING 36..................
STOP SCRUBBING 36....................
DRAINING AND CLEANING THE TANKS 37.
STOP THE MACHINE 40..................
POST-OPERATION CHECKLIST 42.........
OPERATION ON INCLINES 43.............
OPTIONS 44............................
VACUUM WAND 44....................
MACHINE TROUBLESHOOTING 47........
Page
MAINTENANCE 48..........................
MAINTENANCE CHART 48................
LUBRICATION 50.........................
ENGINE 50...........................
REAR WHEEL BEARINGS 50...........
FRONT WHEEL SUPPORT BEARING 51.
SCRUB BRUSH IDLER 51..............
REAR SQUEEGEE CASTERS 51........
HYDRAULICS 52.........................
HYDRAULIC FLUID RESERVOIR 52.....
HYDRAULIC FLUID 52.................
HYDRAULIC HOSES 53................
PROPELLING MOTOR 53...............
ENGINE 54.............................
COOLING SYSTEM 54.................
AIR FILTER INDICATOR 55.............
AIR FILTER 55.........................
FUEL FILTER 56.......................
CARBURETOR 56.....................
SPARK PLUGS 56.....................
VALVE TAPPET CLEARANCE 56........
CRANKCASE VENTILATION SYSTEM 56.
BATTERY 57............................
BELTS AND CHAINS 57...................
ENGINE BELT 57......................
STATIC DRAG CHAIN 57...............
SCRUB BRUSHES 58.....................
REPLACING OR ROTATING THE
SCRUB BRUSHES 58...............
CHECKING AND ADJUSTING
SCRUB BRUSH PATTERN 60........
SOLUTION SYSTEM 62...................
RECOVERY TANK 62..................
SOLUTION TANK 62...................
DEBRIS TRAY 62......................
SQUEEGEES 63..........................
ADJUSTING REAR SQUEEGEE
BLADE DEFLECTION 63.............
LEVELING THE REAR SQUEEGEE 64...
SQUEEGEE BLADES 66..................
REAR SQUEEGEE 66..................
REPLACING OR ROTATING REAR
SQUEEGEE BLADES 66..........
SIDE SQUEEGEES 67.................
REPLACING SIDE SQUEEGEE
BLADES 67......................
SKIRTS AND SEALS 68...................
SCRUB HEAD SKIRTS 68..............
COVER SEALS 68.....................
Factory Cleaning Equipment, Inc.
800.793.3790
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CONTENTS
7400 MM425 (6--00)
2
Page
BRAKES AND TIRES 69...................
SERVICE BRAKES 69..................
PARKING BRAKE 69...................
TIRES 69............................
FRONT WHEEL 69.....................
PUSHING, TOWING, AND TRANSPORTING
THE MACHINE 70......................
PUSHING OR TOWING THE
MACHINE 70....................
TRANSPORTING THE MACHINE 71.....
MACHINE JACKING 73....................
STORING MACHINE 73...................
OPTIONS 74............................
SIDE BRUSH 74......................
REPLACING THE SIDE SCRUB
BRUSH 74.......................
REPLACING THE SQUEEGEE
BLADE 75.......................
SIDE BRUSH SKIRT 75..............
SPECIFICATIONS 76........................
GENERAL MACHINE PERFORMANCE 76...
POWER TYPE 77.........................
STEERING 77...........................
HYDRAULIC SYSTEM 77..................
MACHINE DIMENSIONS 78................
INDEX 79...................................
Factory Cleaning Equipment, Inc.
800.793.3790
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SAFETY PRECAUTIONS
3
7400 MM425 (3--02)
SAFETY PRECAUTIONS
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.
FOR SAFETY: To identify actions that
must be followed for safe operation of
equipment.
The machine is suited to sweep disposable
debris. Do not use the machine other than
described in this Operator Manual. The machine
is not designed for use on public roads.
The following information signals potentially
dangerous conditions to the operator or
equipment:
WARNING: Flammable materials can
cause an explosion or fire. Do not use
flammable materials in tank(s).
WARNING: Flammable materials or
reactive metals can cause an explosion
or fire. Do not pickup.
WARNING: Moving belt and fan. Keep
away.
WARNING: Strong Vacuum. Keep Away
From Fan Inlet When Fan Is Running.
WARNING: Engine emits toxic gases.
Severe respiratory damage or
asphyxiation can result. Provide
adequate ventilation. Consult with your
regulatory authorities for exposure
limits. Keep engine properly tuned.
FOR SAFETY:
1. Do not operate machine:
-- Unless trained and authorized.
-- Unless operator manual is read and
understood.
-- If it is not in proper operating
condition.
-- In flammable or explosive areas unless
designed for use in those areas.
-- 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.
4. When using machine:
-- Use brakes to stop machine.
-- Go slow on inclines and slippery
surfaces.
-- Use care when reversing machine.
-- Do not carry passengers on machine.
-- Always follow safety and traffic rules.
-- Report machine damage or faulty
operation immediately.
-- Follow mixing and handling
instructions on chemical containers.
5. Before leaving or servicing machine:
-- Stop on level surface.
-- Set parking brake.
-- Turn off machine and remove key.
6. When servicing machine:
-- 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. Block machine up with
jack stands.
-- Use hoist or jack that will support the
weight of the machine.
-- Wear eye and ear protection when
using pressurized air or water.
-- Disconnect battery connections before
working on machine.
-- Avoid contact with battery acid.
-- Avoid contact with hot engine coolant.
-- 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.
-- Use Tennant supplied or approved
replacement parts.
Factory Cleaning Equipment, Inc.
800.793.3790
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SAFETY PRECAUTIONS
7400 MM425 (3--02)
4
7. When loading/unloading machine
onto/off truck or trailer:
-- 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.
Factory Cleaning Equipment, Inc.
800.793.3790
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SAFETY PRECAUTIONS
5
7400 MM425 (6--00)
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.
10783
FOR SAFETY LABEL -- LOCATED ON THE
SIDE OF THE OPERATOR COMPARTMENT.
FLAMMABLE SPILLS LABEL -- LOCATED ON
THE SIDE OF THE OPERATOR
COMPARTMENT.
Factory Cleaning Equipment, Inc.
800.793.3790
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SAFETY PRECAUTIONS
7400 MM425 (6--00)
6
FAN AND BELT LABEL -- LOCATED ON THE
ENGINE COMPARTMENT LINTEL.
10783
STRONG VACUUM LABEL -- LOCATED ON
THE VACUUM FAN HOUSING.
FLAMMABLE MATERIALS LABEL -- LOCATED
NEXT TO THE SOLUTION TANK COVERS AND
ON THE DETERGENT TANK.
Factory Cleaning Equipment, Inc.
800.793.3790
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OPERATION
7
7400 MM425 (6--00)
OPERATION
OPERATOR RESPONSIBILITY
-The operator’s responsibility is to take care
of the daily maintenance and checkups of
the machine, to keep it in good working
condition. The operator must inform the
service mechanic or supervisor when the
required maintenance intervals occur as
stated in the MAINTENANCE section of this
manual.
-Read this manual carefully before operating
this machine. View the operation video
supplied with the machine.
FOR SAFETY: Do not operate machine,
unless operation manual is read and
understood.
-Check the machine for shipping damage.
Check to make sure the machine is
complete per shipping instructions.
-Keep your machine regularly maintained by
following the maintenance information in this
manual. We recommend taking advantage
of a regularly scheduled service contract
from your Tennant representative.
-Order parts and supplies directly from your
authorized Tennant representative. Use the
parts manual provided when ordering parts.
-After the first 50 hours of operation, follow
the recommended procedures stated in the
MAINTENANCE CHART.
07324
Factory Cleaning Equipment, Inc.
800.793.3790
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OPERATION
7400 MM425 (6--00)
8
MACHINE COMPONENTS
A
B
C
D
E
F
G
H
I
J
K
L
F
G
H
10783
A. Instrument panel
B. Steering wheel
C. Operator seat
D. Engine cover
E. Machine front cover
F. Solution tank covers
G. Solution tanks
H. Recovery tank covers
I. Recovery Tank
J. Rear squeegee
K. Side Squeegee
L. Scrub brush access door
Factory Cleaning Equipment, Inc.
800.793.3790
www.thesweeper.com

OPERATION
9
7400 MM425 (6--00)
SYMBOL DEFINITIONS
These symbols identify controls, displays, and
features on the machine:
Charging system Steering tilt
Engine oil pressure Horn
Engine water temperature Ignition switch
Maintenance mode Circuit breaker 1
Recovery tank full Circuit breaker 2
Fuel Circuit breaker 3
Diagnostics Circuit breaker 4
Hourmeter Circuit breaker 5
EStCircuit breaker 7
Side brush down and on Circuit breaker 8
Rear squeegee down and vacuum on Cover release
Detergent flow Hydraulic fluid only
Solution flow Gasoline fuel only
Scrub brushes down and on Jack-point
Engine
Factory Cleaning Equipment, Inc.
800.793.3790
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OPERATION
7400 MM425 (6--00)
10
CONTROLS AND INSTRUMENTS
B
C
D
E
F
G
H
I
J
KLM
N
O
P
Q
R
S
T
U
W
Y
A
V
X
Z
10654
A. Directional pedal
B. Brake pedal
C. Parking brake pedal
D. Charging system light
E. Engine oil pressure light
F. Engine water temperature light
G. Maintenance mode light
H. Recovery tank full light
I. Fuel level low light
J. OK light
K. Fuel level gauge
L. Hourmeter
M. EStswitch (option)
N. Side brush switch (option)
O. Squeegee switch
P. Detergent flow switch (option)
Q. Scrub switch
R. Engine speed switch
S. Steering wheel
T. Horn button
U. Ignition switch
V. Steering column tilt lever
W. Circuit breakers
X. Solution flow switch
Y. Engine choke knob
Z. Cover release knob
Factory Cleaning Equipment, Inc.
800.793.3790
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OPERATION
11
7400 MM425 (6--00)
OPERATION OF CONTROLS
DIRECTIONAL PEDAL
The directional pedal controls direction of travel
and the propelling speed of the machine. You
change the speed of the machine with the
pressure of your foot; the harder you press the
faster the machine travels.
Forward: Press the top of the directional pedal
with the toe of your foot.
Reverse: Press the bottom of the directional
pedal with the heel of your foot.
Neutral: Take your foot off the directional pedal
and it will return to the neutral position.
Factory Cleaning Equipment, Inc.
800.793.3790
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OPERATION
7400 MM425 (6--00)
12
BRAKE PEDAL
The brake pedal stops the machine.
Stop: Take your foot off the directional pedal and
let it return to the neutral position. Step on the
brake pedal.
PARKING BRAKE PEDAL
The parking brake pedal sets and releases the
rear wheel brakes.
Set: Press on the brake pedal as far as possible,
then press on the parking brake pedal with the toe
portion of your foot to lock the parking brake pedal
in place.
FOR SAFETY: Before leaving or
servicing machine; stop on level
surface, set parking brake, turn off
machine and remove key.
Release: Press on the brake pedal to unlock the
parking brake pedal.
CHARGING SYSTEM LIGHT
The charging system light comes on when the
alternator is not operating within normal range;
13.5 to 14.5 Volts. Stop operating the machine.
Locate the problem and have it corrected.
10642
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800.793.3790
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OPERATION
13
7400 MM425 (6--00)
ENGINE OIL PRESSURE LIGHT
The engine oil pressure light comes on when the
engine oil pressure falls below 40 kPa (5 psi).
Stop operating the machine. Locate the problem
and have it corrected.
ENGINE WATER TEMPERATURE LIGHT
The engine water temperature light comes on
when the temperature of the engine coolant is
more than 107_C (225_F). Stop operating the
machine. Locate the problem and have it
corrected.
MAINTENANCE MODE LIGHT
The maintenance mode light comes on when the
control panel diagnostic mode is manually
activated. The maintenance mode is for service
personnel use only. To clear the diagnostic mode,
turn the ignition key all the way counter-clockwise.
10643
10644
10645
Factory Cleaning Equipment, Inc.
800.793.3790
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OPERATION
7400 MM425 (6--00)
14
RECOVERY TANK FULL LIGHT
The recovery tank full light starts blinking when
the recovery tank is full. The light will blink for one
minute and then stay on. Then the scrubbing
operations will shut off.
The fuel level light comes on when the gasoline or
LPG fuel tank is almost empty. The LPG fuel tank
has five minutes of fuel remaining when the level
light comes on.
OK LIGHT
The OK light comes on after the control panel has
run through and passed a self-check every time
the machine is started. The OK light will go out
when the scrub or squeegee switch is activated,
or the engine speed is changed to (Fast).
10886
10888
10889
Factory Cleaning Equipment, Inc.
800.793.3790
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OPERATION
15
7400 MM425 (6--00)
FUEL LEVEL GAUGE
The fuel level gauge indicates how much fuel is in
the fuel tank with a segmented LED light.
Gasoline powered machine: When the tank is full,
all ten of the LED segments are lit. As the fuel
tank empties, the LED segments shut off. The fuel
tank is empty when all ten of the LED segments
have shut off. The fuel level light comes on when
the last three LED segments are lit.
LPG powered machines: The fuel level gauge is
not operational on LPG machines. However, the
fuel level light comes on when there is five
minutes of fuel remaining in the tank.
HOURMETER
The hourmeter records the number of hours the
machine has been operated. The hourmeter
displays the number of hours in tenths of an hour.
Use this information to determine machine
maintenance intervals.
07764
07765
Factory Cleaning Equipment, Inc.
800.793.3790
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OPERATION
7400 MM425 (6--00)
16
EStSWITCH (OPTION)
The EStswitch turns on and off the extended
scrub system. When the machine is started, the
EStswitch will default to the last setting used.
On: Press the EStswitch. The indicator light
above the switch will come on.
Off: Press the EStswitch. The indicator light
above the switch goes off.
SIDE BRUSH SWITCH (OPTION)
The side brush switch controls the position and
rotation of the side brush, and the solution flow to
the side brush. When the machine is started, the
side brush switch will default to the last setting
used.
Down and on: Press the side brush switch. The
indicator above the switch comes on.
Up and off: Press the side brush switch. The
indicator above the switch goes off.
NOTE: The side brush will lower and start when
the scrubbing operations start. The main scrub
brushes have to be on for the side brush to
operate.
10890
10891
Factory Cleaning Equipment, Inc.
800.793.3790
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OPERATION
17
7400 MM425 (6--00)
SQUEEGEE SWITCH
The squeegee switch controls the position of the
rear squeegee, and starts and stops the vacuum
fan. The rear squeegee can be operated
separately, from the scrub brushes, for water
pick-up.
Lower and start: Press the squeegee switch. The
indicator light above the switch will come on.
Raise and stop: Press the squeegee switch. The
indicator light above the switch goes off. There will
be a slight delay before the vacuum fan shuts off.
NOTE: The rear squeegee lowers and the
vacuum fan starts automatically when the
scrubbing operations start.
NOTE: The rear squeegee will raise and the
vacuum fan will stop when the machine travels in
reverse.
NOTE: The rear squeegee will raise and the
vacuum fan will shut off after a short delay when
the scrubbing operations are shut off.
10892
Factory Cleaning Equipment, Inc.
800.793.3790
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OPERATION
7400 MM425 (6--00)
18
DETERGENT FLOW SWITCH (OPTION)
The detergent flow switch starts and stops the
detergent pump for the optional EStsystem.
When the machine is started, the detergent flow
switch will default to the last setting used.
Start at one-half flow: Press the detergent flow
switch. The left indicator light above the switch will
come on.
Increase to full flow: Press and hold the detergent
flow switch until both indicator lights above the
switch come on.
Stop: Press the detergent flow switch. Both
indicator lights are off.
SCRUB SWITCH
The scrub switch controls the scrubbing
operations. The scrub switch also sets the scrub
brush pressure.
The scrubbing operations include the following.
The scrub head lowers and the brushes turn on.
The rear squeegee will lower and the vacuum fan
will start. The solution system will start, if the
solution flow switch is on. The optional side brush
will lower and turn on, if the side brush switch is
on. Also, the optional EStsystem and detergent
pump will start, if the switches are on. The engine
speed will change to (Fast).
Start: Press the scrub switch. The indicator light
above the switch will come on.
Stop: Press the scrub switch. The indicator light
above the switch goes off.
Scrub brush pressure: Press and hold the scrub
switch. The brush pressure will scroll through the
three settings. The pressure setting selected
when the switch is released, will be the new
default brush pressure setting.
The brush pressure has three positions. Under
normal conditions, the brush pressure should be
set in the minimum setting. Under heavy grime
conditions, the brush pressure should be set in
the maximum setting. Travel speed and floor
conditions will affect the scrubbing performance.
NOTE: The brush pressure setting, the side
brush, and the detergent flow rate will default to
the last setting used, when the scrubbing
operations are started again.
NOTE: The scrub head and squeegee will raise
when the machine travels in reverse.
10893
10894
Factory Cleaning Equipment, Inc.
800.793.3790
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