Tennant 6650 User manual

6650
*330910*
www.tennantco.com
330910
Rev. 05 (03-2008)
North America / International
Sweeper
Operator Manual
(Gas/LPG)

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:
SThe machine is operated with reasonable care.
SThe machine is maintained regularly - per the machine maintenance instructions provided.
SThe machine is maintained with manufacturer supplied or equivalent parts.
PROTECT THE ENVIRONMENT
Please dispose of packaging materials,
old machine components including
batteries, hazardous fluids such as
antifreeze and oil, in an environmentally
safe way according to local waste
disposal regulations.
Always remember to recycle.
MACHINE DATA
Please fill out at time of installation for future reference.
Model No. --
Serial No. --
Machine Options --
Sales Rep. --
Sales Rep. phone no. --
Customer Number --
Installation Date --
Tennant Company
PO Box 1452
Minneapolis, MN 55440
Phone: [phone] 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, II--Speed, Perma--Filter, 1 Step, Duramer, Vario Sweeping Brush, and VCS are US registered trademarks of Tennant Company.
Specifications and parts are subject to change without notice.
Original instructions, Copyright E2003--2008 TENNANT Company, Printed in U.S.A.

CONTENTS
1
6650 330910 (2--07)
CONTENTS
Page
SAFETY PRECAUTIONS 3.................
OPERATION 7..........................
OPERATOR RESPONSIBILITY 7.........
MACHINE COMPONENTS 9.............
CONTROL PANEL SYMBOLS 10..........
CONTROLS AND INSTRUMENTS 12......
OPERATION OF CONTROLS 13..........
DIRECTIONAL PEDAL 13..............
BRAKE PEDAL 14....................
PARKING BRAKE LEVER 14...........
ONESTEPSWITCH 15................
SHAKE FILTER SWITCH 16............
SIDE BRUSH SWITCH 16..............
VACUUM FAN SWITCH 16.............
ENGINE SPEED CONTROL SWITCH 17
LCD DISPLAY 17.....................
HOURMETER 17.....................
FUEL GAUGE 18.....................
HOPPER OPEN SWITCH 18...........
HOPPER CLOSE SWITCH 18..........
HOPPER UP SWITCH 19..............
HOPPER DOWN SWITCH 19..........
HORN BUTTON 19....................
MAIN BRUSH ADJUSTMENT KNOB 20..
TURN SIGNAL SWITCH (OPTION) 21...
LOW ENGINE OIL PRESSURE LIGHT 22
HIGH ENGINE TEMPERATURE LIGHT 22
MAIN BROOM STALLED LIGHT 22.....
CLOGGED DUST FILTER LIGHT 23....
THERMO SENTRY LIGHT 23...........
LOW FUEL LIGHT 23..................
ALTERNATOR LIGHT 24...............
STEERING WHEEL 24................
STEERING COLUMN TILT LEVER 24...
IGNITION SWITCH 25.................
CHECK ENGINE LIGHT 25.............
OPERATING/HAZARD LIGHTS
SWITCH 26........................
SIDE BRUSH DOWN PRESSURE
KNOB 26..........................
FUSES 27............................
CIRCUIT BREAKERS (OPTION) 28.....
LATCHES 29.........................
HOPPER SUPPORT BAR 30...........
DELUXE SUSPENSION SEAT 30.......
HEATER KNOB (OPTION) 32..........
AIR CONDITIONING SWITCH
(OPTION) 32......................
WINDSHIELD WIPER SWITCH
(OPTION) 32......................
DOME LIGHT SWITCH (OPTION) 33....
PRESSURIZER SWITCH (OPTION) 33..
HOW THE MACHINE WORKS 34..........
PRE-OPERATION CHECKLIST 34.........
CHANGING AN LPG FUEL TANK 35.......
Page
STARTING THE MACHINE 37.............
SWEEPING AND BRUSH INFORMATION 39
SWEEPING 40..........................
STOP SWEEPING 41....................
EMPTYING THE HOPPER 42.............
STOP THE MACHINE 44.................
POST-OPERATION CHECKLIST 46........
ENGAGING HOPPER SUPPORT BAR 47..
DISENGAGING HOPPER SUPPORT BAR 49
OPERATION ON INCLINES 50............
OPTIONS 51............................
VACUUM WAND 51...................
BLOWER WAND 55...................
HEATER VALVE 56....................
MACHINE TROUBLESHOOTING 57.......
MAINTENANCE 58.........................
MAINTENANCE CHART 58...............
LUBRICATION 60........................
ENGINE 60...........................
REAR WHEEL SUPPORT 60...........
HOPPER BEARINGS 61...............
FRONT WHEEL BEARINGS 61.........
HYDRAULICS 62........................
HYDRAULIC FLUID RESERVOIR 62....
HYDRAULIC FLUID 62................
HYDRAULIC HOSES 63...............
PROPELLING MOTOR 63..............
ENGINE 64.............................
COOLING SYSTEM 64................
AIR FILTER 65........................
TO REPLACE AIR FILTER 66........
FUEL FILTER (GASOLINE) 66..........
FUEL FILTER (LPG) 67................
ELECTRONIC PRESSURE REGULATOR
(LPG) (For machines serial number
015000 and above) 67............
ELECTRONIC FUEL INJECTION (EFI) 68
SPARK PLUGS 68....................
VALVE TAPPET CLEARANCE 68.......
CRANKCASE VENTILATION SYSTEM 68
TIMING BELT 68......................
BATTERY 69............................
BELTS AND CHAINS 69..................
ENGINE FAN BELT 69.................
STATIC DRAG CHAIN 69..............
DEBRIS HOPPER 70.....................
HOPPER DUST FILTER 70.............
TO REPLACE HOPPER
DUST FILTER 71................
THERMO SENTRY 73..............

CONTENTS
6650 330910 (2--07)
2
Page
BRUSHES 74............................
MAIN BRUSH 74......................
TO REPLACE MAIN BRUSH 75......
TO CHECK AND ADJUST MAIN
BRUSH PATTERN 76............
SIDE BRUSH 78......................
TO REPLACE SIDE BRUSH 79......
SIDE BRUSH GUARD 79...........
SKIRTS AND SEALS 80..................
HOPPER LIP SKIRTS 80...............
HOPPER SIDE SKIRT 80..............
BRUSH DOOR SKIRTS 80.............
REAR SKIRTS 81.....................
SIDE BRUSH DUST CONTROL
SKIRTS (OPTION) 81...............
BRUSH DOOR SEALS 81..............
HOPPER SEALS 82...................
HOPPER DOOR SEALS 82............
HOPPER FILTER SEALS 83............
HOPPER INSPECTION DOOR SEAL 83.
VACUUM WAND DOOR SEALS
(OPTION) 83......................
BRAKES AND TIRES 84..................
SERVICE BRAKES 84.................
PARKING BRAKE 84..................
TIRES 84............................
REAR WHEEL 84.....................
PUSHING, TOWING, AND
TRANSPORTING THE MACHINE 85....
PUSHING OR TOWING
THE MACHINE 85..................
TRANSPORTING THE MACHINE 85....
MACHINE JACKING 88...................
STORING MACHINE 88..................
SPECIFICATIONS 89.......................
GENERAL MACHINE
DIMENSIONS/CAPACITIES 89.........
GENERAL MACHINE PERFORMANCE 89..
TIRES 89...............................
POWER TYPE 90........................
STEERING 90...........................
HYDRAULIC SYSTEM 90.................
BRAKING SYSTEM 90...................
MACHINE DIMENSIONS 91...............
INDEX 92..................................

SAFETY PRECAUTIONS
3
6650 330910 (3--08)
SAFETY PRECAUTIONS
The following precautions are used throughout
this manual as indicated in their description:
WARNING: To warn of hazards or
unsafe practices which 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 which
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: 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.
WARNING: Raised hopper may fall.
Engage hopper support bar.
WARNING: Lift arm pinch point. Stay
clear of hopper lift arms.
WARNING: Moving belt and fan. Keep
away.
WARNING: Accident may occur. Do not
operate vacuum or blower wand while
driving.
WARNING: Hot surface. keep away
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.
-- 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:
-- 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.
-- Use care when reversing machine.
-- Move machine with care when hopper
is raised.
-- Make sure adequate clearance is
available before raising hopper.
-- Do not carry passengers on machine.
-- Always follow safety and traffic rules.
-- Report machine damage or faulty
operation immediately.
5. Before leaving or servicing machine:
-- Stop on level surface.
-- Set parking brake.
-- Turn off machine and remove key.

SAFETY PRECAUTIONS
6650 330910 (4--03)
4
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.
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.

SAFETY PRECAUTIONS
5
6650 330910 (3--05)
The following safety labels are mounted on the
machine in the locations indicated. If these or any
label becomes damaged or illegible, install a new
label in its place.
HOPPER LIFT ARMS LABEL -- LOCATED
ON BOTH HOPPER LIFT ARMS.
HOPPER SUPPORT BAR LABEL -- LOCATED
ON THE HOPPER SUPPORT BAR AND ON
BOTH HOPPER LIFT ARMS.
ENGINE FAN AND BELT
LABEL -- LOCATED ON
THE RADIATOR SHROUD.
EMISSIONS LABEL -- LOCATED ON THE SIDE
PANEL OF THE OPERATOR COMPARTMENT.
354001
FOR SAFETY LABEL -- LOCATED ON
THE SIDE PANEL OF THE OPERATOR
COMPARTMENT.
BURN HAZARD LABEL --
LOCATED ON THE REAR
OF THE FRAME.
LPG ENGINE WILL RUN LABEL--
LOCATED ON THE SIDE OF THE
INSTRUMENT PANEL.

SAFETY PRECAUTIONS
6650 330910 (2--04)
6

OPERATION
7
6650 330910 (4--03)
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.
FOR SAFETY: Do not operate machine,
unless operation manual is read and
understood.
-Check the machine for shipping damage.
Check to make sure machine is complete
per shipping instructions.
-Check the hydraulic fluid level in the
hydraulic reservoir.
-Check the engine oil level.
-Check the radiator coolant level.
FOR SAFETY: When servicing machine,
avoid contact with hot engine coolant.
-Fill the fuel tank.
FOR SAFETY: When servicing machine,
keep flames and sparks away from fuel
system service area. Keep area well
ventilated.
0
7
3
2
4

OPERATION
6650 330910 (4--03)
8
-LPG powered machines: Install the LPG fuel
tank on the machine. See CHANGING AN
LPG FUEL TANK.
FOR SAFETY: When servicing machine,
keep flames and sparks away from fuel
system service area. Keep area well
ventilated.
-After the first 50 hours of operation, follow
the recommended procedures stated in the
MAINTENANCE CHART.
-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.

OPERATION
9
6650 330910 (3--07)
MACHINE COMPONENTS
AB
C
D
E
F
H
I
G
J
354001
A. Steering Wheel
B. Operator Seat
C. Engine Cover
D. Engine Side Door
E. Main Brush Access Door
F. Hopper Access Cover
G. Side Brush
H. Hopper Cover
I. Instrument Panel
J. Fuel Tank

OPERATION
6650 330910 (3--05)
10
CONTROL PANEL SYMBOLS
These symbols identify controls and displays on
the machine:
Main Brush On Low Engine Oil Pressure
Main Brush Up High Engine Temperature
Horn Main Broom Stall
Hopper Door Open Clogged Dust Filter
Hopper Door Close Thermo Sentry
Hopper Down Low Fuel
Hopper Up Alternator
Filter Shaker Hazard Light
Side Brush Operating Lights
Vacuum Fan
Engine Speed

OPERATION
11
6650 330910 (2--04)
Side Brush Down Pressure Light
Side Brush Down Pressure Heavy
Windshield Wiper Slow
Windshield Wiper Fast
Dome Light
Heater
Cab Pressurizer Slow
Cab Pressurizer Fast
Check Engine

OPERATION
6650 330910 (6--06)
12
CONTROLS AND INSTRUMENTS
A
F
G
M
B
D
C
E
HI
JK
L
O
P
Q
Y
W
X
V
U
T
S
R
N
Z
A. Low Engine Oil Pressure Light
B. High Engine Temperature Light
C. Main Broom Stalled Light
D. Clogged Dust Filter Light
E. Thermo Sentry Light
F. L o w F u e l L i g h t
G. Alternator Light
H. Hopper Close Switch
I. Hopper Open Switch
J. Hopper Down Switch
K. Hopper Up Switch
L. LCD Display
M. Shake Filter Switch
N. Side Brush Switch
O. One Step Switch
P. I g n i t i o n S w i t c h
Q. Vacuum Fan Switch
R. Engine Speed Switch
S. Steering Wheel
T. D i r e c t i o n a l P e d a l
U. Steering Wheel Tilt Lever
V. Parking Brake Lever
W. Fuses
X. Horn Button
Y. Main Brush Adjustment Knob
Z. Check Engine Light (For machines serial number 010000 and above)

OPERATION
13
6650 330910 (4--03)
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.

OPERATION
6650 330910 (4--03)
14
The toe angle of the directional pedal is
adjustable. Remove the clevis pin, move the top
of the pedal to the angle needed, and put the
clevis pin through the adjustment holes.
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 LEVER
The parking brake lever sets and releases the
front wheel brakes.
Set: Pull the parking brake lever up.
FOR SAFETY: Before leaving or
servicing machine; stop on level
surface, set parking brake, turn off
machine and remove key.
Release: Push the parking brake lever down.

OPERATION
15
6650 330910 (4--03)
ONESTEPSWITCH
The one step switch controls the sweeping
functions.
Start sweeping: Press the one step switch.
The indicator light will illuminate. The engine
speed will automatically increase to medium
speed and the hopper door will open. The main
sweeping brush and side brushes will lower and
turn on and the vacuum fan will turn on.
NOTE: The hopper must be fully down, or the one
step switch will not operate. If the hopper is up
when the one step switch is activated, the hopper
down light will blink, and the sweeping functions
will not turn on.
NOTE: The one step switch will not operate if the
thermo sentry senses excessive heat in the
hopper. If the thermo sentry senses excessive
heat in the hopper, the thermo sentry warning light
will come on and the sweeping functions will not
turn on.
Stop sweeping: Press the one step switch.
The indicator light will turn off and the engine
speed will stay at the selected speed (medium or
high speed). The hopper door will automatically
close. The main sweeping brush and side brushes
will turn off, and raise to the up position. The
vacuum fan will turn off and the filter shaker will
activate for approximately 10 seconds.

OPERATION
6650 330910 (4--03)
16
SHAKE FILTER SWITCH
The shake filter switch activates the filter shaker.
Shake filter: Press the shake filter switch.
The indicator light will illuminate. The shaker will
operate for approximately 10 seconds.
NOTE: The shaker will automatically activate after
the vacuum fan is turned off.
NOTE: The shaker will automatically de--activate
when the vacuum fan is turned on.
SIDE BRUSH SWITCH
The side brush switch controls the side brush
position and rotation. The main brush must be
operating for the side brush to work.
Down and On: Press the side brush switch. The
indicator light will illuminate, and the side brush
will turn on and lower to the down position.
Up and Off: Press the side brush switch. The
indicator light will turn off, and the side brush will
turn off and raise to the up position.
VACUUM FAN SWITCH
The vacuum fan switch activates the vacuum fan,
so it can be used to operate the vacuum wand
(vacuum wand mode) without the other sweeping
functions.
Vacuum fan on: Press the vacuum fan switch.
The indicator light will illuminate and the engine
speed will set to High speed.
Vacuum fan off: Press the vacuum fan switch.
The indicator light will turn off and the engine
speed will set to Low speed.
NOTE: The shaker will automatically activate after
the vacuum fan is turned off.

OPERATION
17
6650 330910 (4--03)
ENGINE SPEED CONTROL SWITCH
The engine speed control switch allows the
operator to cycle through and choose from the
three different engine speed settings; Low,
Medium, and High.
Change engine speed: Press and hold the engine
speed control switch. The machine will scroll
through the three engine speeds continuously.
Release the switch when the desired speed is
chosen.
NOTE: The sweeping functions will not operate
with the Low engine setting.
NOTE: The engine speed will automatically set to
the Medium engine speed when the one step
functions are activated.
NOTE: The engine speed will automatically set to
the High engine speed when the vacuum fan is
activated without the one step switch.
LCD DISPLAY
The LCD display is located in the middle of the
control panel. The LDC display shows the
hourmeter, fuel gauge and text messages to
assist with machine maintenance.
HOURMETER
The hourmeter is displayed on the right side of the
LCD display. The hourmeter records the number
of hours the machine has been operated. Use this
information to determine machine maintenance
intervals.
02003

OPERATION
6650 330910 (4--03)
18
FUEL GAUGE
The fuel gage shows the amount of fuel in the
tank with eight segments on the left side of the
LCD display.
Gasoline Machines: The fuel gauge shows all
eight segments when the tank is full. The eight
segments individually turn off as the tank empties.
When all eight segments are off, the tank is
almost out of fuel.
L.P. Machines: The fuel gauge shows all or none
of the eight segments. When all eight segments
are off, the L.P. tank is almost out of fuel.
NOTE: When the tank is almost empty, the Low
Fuel light will illuminate.
HOPPER OPEN SWITCH
The hopper open switch opens the hopper door
and dust door. Open the hopper door when
sweeping.
Open: Press the hopper open switch. The
indicator light will illuminate, and the hopper door
will open.
NOTE: The hopper door will automatically open
when the One--Step switch is activated.
HOPPER CLOSE SWITCH
The hopper close switch closes the hopper door
and dust door. Close the hopper door when
emptying the hopper to control debris and dust.
Close: Press the hopper close switch. The
indicator light will illuminate, and the hopper door
will close.
NOTE: The hopper door will automatically close
when the Thermo Sentry is activated.
)___