Tennant 6650 User manual

6650
*330950*
www.tennantco.com
330930
Rev. 05 (03-2008)
North America / International
(Diesel)
Sweeper
Operator Manual

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
6650D 330930 (6--06)
CONTENTS
Page
SAFETY PRECAUTIONS 3.................
OPERATION 7............................
OPERATOR RESPONSIBILITY 7.........
MACHINE COMPONENTS 8.............
CONTROL PANEL SYMBOLS 9..........
CONTROLS AND INSTRUMENTS 11......
OPERATION OF CONTROLS 12..........
DIRECTIONAL PEDAL 12..............
BRAKE PEDAL 13....................
PARKING BRAKE LEVER 13...........
ONESTEPSWITCH 14................
SHAKE FILTER SWITCH 15............
SIDE BRUSH SWITCH 15..............
VACUUM FAN SWITCH 15.............
ENGINE SPEED CONTROL SWITCH 16
LCD DISPLAY 16.....................
HOURMETER 16.....................
FUEL GAUGE 17.....................
HOPPER OPEN SWITCH 17...........
HOPPER CLOSE SWITCH 17..........
HOPPER UP SWITCH 18..............
HOPPER DOWN SWITCH 18..........
HORN BUTTON 18....................
MAIN BRUSH ADJUSTMENT KNOB 19..
TURN SIGNAL SWITCH (OPTION) 20...
LOW ENGINE OIL PRESSURE LIGHT 21
HIGH ENGINE TEMPERATURE LIGHT 21
MAIN BROOM STALLED LIGHT 21.....
CLOGGED DUST FILTER LIGHT 22....
THERMO SENTRY LIGHT 22...........
LOW FUEL LIGHT 22..................
ALTERNATOR LIGHT 23...............
GLOW PLUG LIGHT 23................
STEERING WHEEL 23................
STEERING COLUMN TILT LEVER 23...
IGNITION SWITCH 24.................
OPERATING/HAZARD LIGHTS
SWITCH 25........................
SIDE BRUSH DOWN PRESSURE
KNOB 25..........................
FUSES 26............................
CIRCUIT BREAKERS (OPTION) 27.....
LATCHES 28.........................
HOPPER SUPPORT BAR 29...........
DELUXE SUSPENSION SEAT 29.......
HEATER KNOB (OPTION) 31..........
AIR CONDITIONING SWITCH
(OPTION) 31......................
WINDSHIELD WIPER SWITCH
(OPTION) 31......................
DOME LIGHT SWITCH (OPTION) 32....
PRESSURIZER SWITCH (OPTION) 32..
Page
HOW THE MACHINE WORKS 33
..........
PRE-OPERATION CHECKLIST 33.........
STARTING THE MACHINE 34.............
SWEEPING AND BRUSH INFORMATION 36
SWEEPING 37..........................
STOP SWEEPING 38....................
EMPTYING THE HOPPER 39.............
STOP THE MACHINE 41.................
POST-OPERATION CHECKLIST 42........
ENGAGING HOPPER SUPPORT BAR 43..
DISENGAGING HOPPER SUPPORT BAR 45
OPERATION ON INCLINES 46............
OPTIONS 47............................
VACUUM WAND 47...................
BLOWER WAND 51...................
HEATER VALVE 52....................
MACHINE TROUBLESHOOTING 53.......
MAINTENANCE 54.........................
MAINTENANCE CHART 54...............
LUBRICATION 56........................
ENGINE 56...........................
REAR WHEEL SUPPORT 56...........
HOPPER BEARINGS 57...............
FRONT WHEEL BEARINGS 57.........
HYDRAULICS 58........................
HYDRAULIC FLUID RESERVOIR 58....
HYDRAULIC FLUID 58................
HYDRAULIC HOSES 59...............
PROPELLING MOTOR 59..............
ENGINE 60.............................
COOLING SYSTEM 60................
AIR FILTER INDICATOR 61............
AIR FILTER 61........................
TO REPLACE AIR FILTER 61........
FUEL FILTER 63......................
FUEL PIPES 63.......................
PRIMING FUEL SYSTEM 63...........
BATTERY 64............................
BELTS AND CHAINS 64..................
ENGINE FAN BELT 64.................
STATIC DRAG CHAIN 64..............
DEBRIS HOPPER 65.....................
HOPPER DUST FILTER 65.............
TO REPLACE HOPPER
DUST FILTER 66................
THERMO SENTRY 68.................

CONTENTS
6650D 330930 (3--05)
2
Page
BRUSHES 69............................
MAIN BRUSH 69......................
TO REPLACE MAIN BRUSH 70......
TO CHECK AND ADJUST MAIN
BRUSH PATTERN 71............
SIDE BRUSH 73......................
TO REPLACE SIDE BRUSH 74......
SIDE BRUSH GUARD 74...........
SKIRTS AND SEALS 75..................
HOPPER LIP SKIRTS 75...............
HOPPER SIDE SKIRT 75..............
BRUSH DOOR SKIRTS 75.............
REAR SKIRTS 76.....................
SIDE BRUSH DUST CONTROL
SKIRTS (OPTION) 76...............
BRUSH DOOR SEALS 76..............
HOPPER SEALS 77...................
HOPPER DOOR SEALS 77............
HOPPER FILTER SEALS 78............
HOPPER INSPECTION DOOR SEAL 78.
VACUUM WAND DOOR SEALS
(OPTION) 78......................
BRAKES AND TIRES 79..................
SERVICE BRAKES 79.................
PARKING BRAKE 79..................
TIRES 79............................
REAR WHEEL 79.....................
PUSHING, TOWING, AND
TRANSPORTING THE MACHINE 80....
PUSHING OR TOWING THE MACHINE 80
TRANSPORTING THE MACHINE 80....
MACHINE JACKING 83...................
STORING MACHINE 83..................
SPECIFICATIONS 84.......................
GENERAL MACHINE
DIMENSIONS/CAPACITIES 84.........
GENERAL MACHINE PERFORMANCE 84..
TIRES 84...............................
POWER TYPE 85........................
STEERING 85...........................
HYDRAULIC SYSTEM 85.................
BRAKING SYSTEM 85...................
MACHINE DIMENSIONS 86...............

SAFETY PRECAUTIONS
3
6650D 330930 (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.
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.
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
6650D 330930 (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
6650D 330930 (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.

SAFETY PRECAUTIONS
6650D 330930 (2--04)
6

OPERATION
7
6650D 330930 (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.
-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.
0
7
3
2
4

OPERATION
6650D 330930 (3--07)
8
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
9
6650D 330930 (3--05)
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
6650D 330930 (2--04)
10
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

OPERATION
11
6650D 330930 (6--06)
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. Glow Plug Light

OPERATION
6650D 330930 (4--03)
12
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
13
6650D 330930 (4--03)
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
6650D 330930 (4--03)
14
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
15
6650D 330930 (4--03)
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
6650D 330930 (4--03)
16
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
17
6650D 330930 (4--03)
FUEL GAUGE
The fuel gauge is displayed by eigh segments on
the left side of the LCD display.
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.
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.
)___

OPERATION
6650D 330930 (4--03)
18
HOPPER UP SWITCH
The hopper up switch raises the hopper.
Up: Press and hold the hopper up switch. The
indicator light will illuminate while the switch is
pressed.Release the switch when the hopper is
at the desired height.
WARNING: Raised hopper may fall.
Engage hopper support bar.
NOTE: The One Step sweeping functions will stop
when the hopper up switch is activated.
HOPPER DOWN SWITCH
The hopper down switch lowers the hopper.
Down: Press and hold the hopper down switch.
The indicator light will illuminate while the switch
is pressed. Release the switch when the hopper is
all the way down in the lowered position.
HORN BUTTON
The horn button operates the horn.
Sound: Press the button.