Clarke Alto STV-20D User manual

Operator's
Manual
Form No. 78439A 12/98 CLARKE TECHNOLOGY Printed in the U.S.A.
READ THIS BOOK
This book has important information for the use and safe operation of this machine. Failure to read
this book prior to operating or attempting any service or maintenance procedure to your ALTO
machine could result in injury to you or to other personnel; damage to the machine or to other property
could occur as well. You must have training in the operation of this machine before using it. If you
cannot read English, have this manual explained fully before attempting to operate this machine.
All directions given in this book are as seen from the operator’s position at the rear of the machine.
For new books write to: ALTO U. S. Inc., 2100 Highway 265, Springdale, Arkansas 72764.
STV-20
STV-20D

Page -2- CLARKE TECHNOLOGY Operator's Manual STV-20/20D
Contents of this Book
Operator Safety Instructions ....................................................... 3
120V Instructions - Power Supply & Electrical Ground ............... 4
230V Instructions - Power Supply & Electrical Ground ............... 5
STV-20 Single Motor Head Assembly .........................................6
STV-20 Dual Motor Head Assembly ............................................ 7
Filter Bag and Float Assembly.....................................................8
Wet Vac Tools Parts List .............................................................8
Tank Assembly & Tilt & Pour Carriage Assembly........................ 9
Squeegee Tool and Floor Brush Tool Parts List ........................ 10

Page -3-
CLARKE TECHNOLOGY Operator's Manual STV-20/20D
OPERATOR SAFETY INSTRUCTIONS
WARNING AVERTISSEMENT ADVERTENCIA
DANGER: Failure to read and observe all DANGER statements could result
in severe bodily injury or death. Read and observe all DANGER
statements found in your Owner's Manual and on your machine.
WARNING: Failure to read and observe all WARNING statements could result
in injury to you or to other personnel; property damage could
occur as well. Read and observe all WARNING statements found
in your Owner's Manual and on your machine.
CAUTION: Failure to read and observe all CAUTION statements could result
in damage to the machine or to other property. Read and observe
all CAUTION statements found in your Owner's Manual and on
your machine.
DANGER: Failure to read the Owner's Manual prior to operating or attempting any service
or maintenance procedure to your ALTO machine could result in injury to you or to
other personnel; damage to the machine or to other property could occur as well.
You must have training in the operation of this machine before using it. If you or
your operator(s) cannot read English, have this manual explained fully before
attempting to operate this machine.
DANGER: Operating a machine that is not completely or fully assembled could result in
injury or property damage. Do not operate this machine until it is completely
assembled. Inspect the machine carefully before operation. Use only as de-
scribed in this manual. Use only Clarke's recommended attachments.
DANGER: Machines can cause an explosion when operated near flammable materials and
vapors. Do not use this machine with or near fuels, grain dust, solvents,
thinners, or other flammable materials.
DANGER: Using a machine with a damaged power cord could result in an electrocution. Do
not use the machine if the power cord is damaged. Do not use the electrical cord
to move the machine. Keep cord away from heated surfaces. Do not unplug by
pulling on the cord; grasp the plug not the cord.
DANGER: Electrocution could occur if maintenance and repairs are performed on a unit that
is not properly disconnected from the power source. Disconnect the power
supply before attempting any maintenance or service.
WARNING: Operating a machine without observing all labels, decals, etc., could result in
injury or damage. Read all machine labels before attempting to operate the
machine. Make sure all of the labels are attached or fastened to the machine.
Get replacement labels and decals from your Clarke distributor.
WARNING: Electical components can "short-out" if exposed to water or moisture. Keep the
electrical components of the machine dry. Always store the machine in a dry building.
WARNING: Use of this machine to move other objects or to climb on could result in injury to the
operator or damage to the machine. Do not use this machine as a step or furniture.
Do not allow to be used as a toy. Close attention is necessary when used by or near
children.
WARNING: Moving parts of this machine can cause injury and/or damage. Keep hands, feet, loose
clothing, hair, fingers, and all parts of the body away from openings and moving parts.

Page -4- CLARKE TECHNOLOGY Operator's Manual STV-20/20D
WARNING: Electrocution could occur if you handle the plug or appliance with wet hands. Do not
handle plug or appliance with wet hands.
WARNING: Damage could occur to machine if openings are blocked. Do not put any object into
openings. Do not use with any opening blocked; keep free of dust, lint, hair, and anything
that may reduce air flow.
WARNING: Injury could occur to the operator or the machine if used without the dust bag and/or filters.
Do not use the machine without the dust bag and/or filters in place.
WARNING: Injury to the operator and/or damage to the machine could occur when cleaning on stairs,
unless extra caution is used. Use extra caution when cleaning on stairs.
WARNING: To prevent possible electrical shock, always use a 3-wire electrical system connected to the
electrical ground. See "Grounding Instructions".
WARNING: To reduce the risk of fire, electric shock, or injury:
• Do not leave appliance when plugged in. Unplug from outlet when not in use and
before servicing.
• Do not pick up anything that is burning or smoking, such as cigarettes, matches, or
hot ashes.
• Turn off all controls before unplugging.
120 Volt Machine
Instructions For Connection
To The Power Supply
And The Electrical Ground
This machine must be connected to the electrical
ground to protect the operator from electric shock. The
machine has an approved power cord with three con-
ductors and a plug with three terminals. Connect the
plug to a receptacle that has three holes and is con-
nected to the electrical ground. The green (or green
and yellow) conductor in the cord is the ground wire.
Never connect this wire to any terminal other then the
ground terminal.
This machine uses a 120 volt AC 60 cycle electrical
circuit. Make sure you have the correct frequency and
voltage before connecting the power cord to an outlet.
The machine has a plug as shown in Figure 1. If a
receptacle connected to the electrical ground as shown
in Figure 1 is not available, have one installed by an
electrical contractor. Do not use an adapter.
WARNING: To prevent possible electric
shock, protect the machine
from rain. Keep the machine
in a dry building.
WARNING: To prevent possible electric
shock, always use a 3-wire elec
trical system connected to the
electrical ground.
WARNING: Do not cut, remove or break the
ground pin. If the outlet does not
fit the plug, consult your electrical
contractor.
WARNING: Have worn, cut or damaged cords
and plugs replaced by an autho-
rized service person.
Figure 1
Plate
Screw
Outlet must be
connected to
the electrical
ground
Ground Pin

Page -5-
CLARKE TECHNOLOGY Operator's Manual STV-20/20D
230 Volt Machine
Instructions For Connection
To The Power Supply
And The Electrical Ground
This machine must be connected to the electrical
ground to protect the operator from electric shock.
The machine has an approved power cord with two
main conductors and one earthing conductor. Con-
nect the plug to a receptacle as shown in Figure 2.
The green (or green and yellow) conductor in the cord
is the ground wire. Never connect this wire to any
terminal other then the ground terminal.
Make sure you have the correct frequency and
voltage before connecting the power cord to an
outlet. The machine has a plug as shown in
Figure 2. If a receptacle connected to the electrical
ground as shown in Figure 2 is not available, have
one installed by an electrical contractor. Do not use
an adapter.
WARNING: This machine will operate
only on AC frequency and
electrical voltage shown on
the nameplate. Make sure
you have the correct fre-
quency and voltage before
connecting the power cord
to an outlet. If you are not
sure, consult your electrical
contractor.
WARNING: Have worn, cut or damaged
cords and plugs replaced by
an authorized service
person.
After using this machine, follow these instructions:
- Store the cord on the hook.
- Store the machine indoors away from sources
of heat.
This machine is provided with an automatically reset
thermal overload to avoid damage to the motor. If
the thermal overload stops the motor unplug the
machine and follow the procedures below:
- Empty the vacuum tank.
- Shake the filter bag to remove dust.
- In a few minutes the thermal overload will
allow restarting of the motor.
Figure 2
Pin Earthing Contacts
Side Earthing Contacts
European Plug

Page -6- CLARKE TECHNOLOGY Operator's Manual STV-20/20D
CLARKE TECHNOLOGY STV-20
Single Motor Assembly Drawing & Parts List 1/98
Ref. Part No. Description Qty
1 51841A Cord, Power 1
2 56448A Strain Relief 1
3 54503A Cord, Grip 1
4 56441A Screw, 5mm x 20mm 2
5 51869A Cord, Hook 1
6 88304A Screw 5mm x 50mm 4
7 54922A Handle, Lift 1
8 56482A Screw 5mm x 35mm 2
9 56441A Screw, 5mm x 20mm 4
10 88001A Screw, 5mm x 14mm 2
11 40409A Block, Terminal 1
12 88304A Screw, 5mm x 50mm 2
13 52765A Cover, Dome 1
14 56441A Screw, 5mm x 20mm 2
15 47316B Switch, Rocker 1
16 54064A Filter, Upper 1
17 88304A Screw, 5mm x 50mm 9
18 51872A Clip, Spring 1
19 57162A Plug, Upper 2
20 52799A Cover, Motor 1
21 56483A Screw, 5mm x 40mm 9
22 56483A Screw, 5mm x 40mm 3
23 58410A Support, Motor 1
24 58414A Screw, 5mm x 30mm 1
25 56442A Screw, 4.3mm x 19mm 1
26 50507A Block, Terminal 1
27 57877A Ring, Vac Motor 1
28 56441A Screw, 5mm x 20mm 4
30 54377A Gasket, Vac Motor 1
31 56039B Motor, Vac 115V 1
56046B Motor, Vac 230V 1
40834A Brush, Carbon 115V 1
40835A Brush, Carbon 230V 1
32 54377A Gasket, Vac Motor 1
33 56441A Screw 5mm x 20mm 8
34 54377A Gasket, Vac Motor 2
35 57163A Plug, Motor 2
36 54058A Foam, Triangle 3
37 54059A Filter 3
38 57164A Plug, Lower 2
39 50760A Base, Motor 1
40 59859A Washer, Star 1
41 56485A Screw, 4mm x 8mm 1
NI 59887A Wire, Connect 4
NI 52944A Clip 2
56 7
8
9
12
13
14
15
16
17
19
20
21
22
23
27
28
30
40
41
31
32
36
37
38
39
35
34
33
26
25
24
18
11
10
1
2
3
4
NI= Not Illustrated

Page -7-
CLARKE TECHNOLOGY Operator's Manual STV-20/20D
CLARKE TECHNOLOGY STV-20D
Dual Motor Head Assembly Drawing & Parts List 1/98
Ref. Part No. Description Qty
1 51841A Cord, Power 1
2 56448A Strain Relief 1
3 54503A Cord, Grip 1
4 56441A Screw, 5mm x 20mm 2
5 51869A Cord Hook 1
6 88304A Screw, 5mm x 50mm 4
7 54922A Handle, Lift 1
8 56482A Screw 5mm x 35mm 2
9 56441A Screw 5mm x 20mm 4
10 88001A Screw 5mm x 14mm 9
11 59112A Block, Terminal 1
12 88304A Screw, 5mm x 50mm 2
13 52763A Cover, Dome 1
14 56441A Screw, 5mm x 20mm 2
15 47393A Switch, Rocker 2
16 54064A Filter, Upper 2
17 88304A Screw, 5mm x 50mm 9
18 51872A Clip, Spring 1
19 57162A Plug, Upper 1
20 52799A Cover, Motor 1
21 56483A Screw, 5mm x 40mm 9
22 56483A Screw, 5mm x 40mm 3
23 58410A Support, Motor 1
24 58414A Screw, 5mm x 30mm 1
25 56442A Screw, 4.3 mm x 19mm 1
26 50761A Block, Terminal 1
27 57877A Ring, Vac Motor 2
28 56441A Screw, 5mm x 20mm 8
30 54377A Gasket, Vac Motor 2
31 44918B Motor, Vac 115V 2
44922B Motro, Vac 230V 2
40834A Brush, Carbon 115V 1
40835A Brush, Carbon 230V 1
32 54377A Gasket, Vac Motor 2
33 56441A Screw, 5mm x 20mm 4
34 54377A Gasket, Vac Motor 1
35 57163A Plug, Motor 1
36 54058A Foam, Triangle 3
37 54059A Filter 3
38 59770A Valve, Auto 2
39 57164A Plug, Lower 1
40 50760A Base, Motor 1
41 59859A Washer, Star 2
42 56485A Screw, 4mm x 8mm 2
NI 59887A Wire, Connect 8
NI 52944A Clip 3
NI= Not Illustrated
56 7
8
9
13
14
12
15
16
17
19
20
21
22
23
18
24
25
26
27
28
30
41
42
31
32
36
37
38
39
40
33
34
35
60
11
10
2
3
4
1

Page -8- CLARKE TECHNOLOGY Operator's Manual STV-20/20D
CLARKE TECHNOLOGY STV-20
Filter Bag & Float Assembly Drawing & Parts List 1/98
Part No. Description
59213B Tool, Squeegee
59214B Tool, Floor Brush
59215A Tool, Crevice 38mm
57503A Reducer, Wand
59860A Wand, Extenion 2 Pc.
59861A Wand, Chrome 2 Pc
54887A Hose, 38mm, 2.5m
Wet Vac Tools
Ref Part No. Description Qty
1 58541A Spacer, Plastic 4
2 58413A Screw, 5mm x 20mm 4
3 57856A Cage, Float 1
4 54027A Filter 1
5 53981A Float 1
6 50339A Adapter, Bag 1
7 50720A Bag, Filter 1
8 56492A Support, Filter Bag 1
1
2
3
4
5
6
7
8
To add optional filters for STV-20 or STV-20D order:
54015A Filter, HEPA 1 and 57372A Retainer 1
or
53982A Filter, Cartridge 1 and 57372A Retainer 1

Page -9-
CLARKE TECHNOLOGY Operator's Manual STV-20/20D
CLARKE TECHNOLOGY STV-20 STV-20D
Tank Assembly & Tilt and Pour Carriage Drawing & Parts List 1/98
Ref. Part No. Description Qty
1 54921A Handle, Transport 1
2 58529A Spacer, Hinge 2
3 50460A Pivot, Tank Support 1
4 57380A Rivet 4
5 56490A Support, Handle 1
6 56441A Screw, 5mm x 20mm 4
7 51868A Carriage, 20 gal. 1
8 50459A Pivot, Wheel 2
9 51184A Bearing, Spacer 2
10 59948A Wheel, 20 gal. 2
11 54897A Hub Cap 2
12 57853A Ring, Snap 2
13 56441A Screw, 5mm x 20mm 8
14 50555A Block, Stirrup 2
15 56481A Screw, 5mm x 30mm 8
16 52120A Caster, Swivel 2
Tilt and Pour Carriage
1
2
3
4
5
6
7
8
9
10
11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11
12
13
1
14
15
Ref. Part No. Description Qty
1 54920A Handle, Assembly 2
2 51823A Clamp, Tank 2
3 57374A Rivet 4
4 56481A Screw, 5mm x 30mm 8
5 87055A Washer 8
6 58925A Tank, SS 20 gal. 1
7 56481A Screw, 5mm x 30mm 4
8 57375A Retainer, Poly Tank 1
9 54376A Gasket, Tank Adaptor 1
10 53166A Deflector, Tank 1
11 50336A Adaptor, Hose 1
12 50524A Button, Push 1
13 58692A Spring, Push Button 1
14 87055A Washer 4
15 56481A Screw, 5mm x 30mm 4
16 56481A Screw, 5mm x 30mm 4
17 87055A Washer 4
18 50554A Body, Hinge 1
19 55008A Hinge, Locking 2
20 55534A Knob, Hinge 2
Tank Assembly
16
17
18
19
20

Page -10- CLARKE TECHNOLOGY Operator's Manual STV-20/20D
Ref. Part No. Qty Description
1 50753A 1 Body, Tool
2 57873A 1 Ring, Floor Tool
3 50357A 1 Adaptor, Floor Tool
4 53096A 2 Support, Floor Tool
5 88001A 4 Screw, 5mm x 15mm
6 59970A 2 Wheel & Axle
7 51716A 1 Brush Guide
8 51717A 1 Brush Strip, Serrated
Ref. Part No. Qty Description
1 50753A 1 Body, Tool
2 57873A 1 Ring, Floor Tool
3 50357A 1 Adapter, Floor Tool
4 53096A 2 Support, Floor Tool
5 88001A 4 Screw, 5mm x 15mm
6 59970A 2 Wheel & Axle
7 53097A 2 Squeegee Blade
Floor Brush Tool - 59214B
Squeegee Tool - 59213B
CLARKE TECHNOLOGY STV-20 and STV-20D
Floor Brush Tool Drawing & Parts List 1/98
CLARKE TECHNOLOGY STV-20 and STV-20D
Squeegee Tool Drawing & Parts List 1/98
123
654 7
123
654 78

Page -11-
CLARKE TECHNOLOGY Operator's Manual STV-20/20D
ALTO® PRODUCT SUPPORT BRANCHES
PRODUCTION FACILITIES
ALTO Danmark A/S, Aalborg
Blytaekkervej 2
DK-9000 Aalborg
[phone]
ALTO Danmark A/S, Hadsund
Industrikvarteret
DK-9560 Hadsund
[phone]
SALES SUBSIDIARIES
ALTO Canada Ltd., Rexdale Ontario
24 Constellation Ct.
[phone]
ALTO Overseas Inc., Sydney (Australia)
1B/8 Resolution Drive
Caringbah NSW 2229
[phone]
ALTO Cleaning Systems Asia Pte Ltd., Singapore
No. 17 Link Road
Singapore 619034
[phone]
ALTO Deutschland GmbH, Bellenberg (Germany)
Guido-Oberdorfer-Straße 2-8
89287 Bellenberg
[phone]
ALTO Cleaning Systems (UK) Ltd., Penrith
Gilwilly Industrial Estate
Penrith
Cumbria CA11 9BN
[phone]
ALTO France S.A. Strasbourg
B.P. 44, 4 Place d’Ostwald
F-67036 Strasbourg
Cedex 2
[phone]
ALTO Nederland B.V.Vianen
Stuartweg 4C
NL-4131 NJ Vianen
[phone]
ALTO Sverige AB, Molndal (Sweden)
Aminogatan 18
Box 4029
S-431 04 Molndal
[phone]
ALTO Norge A/S, Oslo (Norway)
Bjornerudveien 24
N-1266
[phone]
CLARKE TECHNOLOGY
AMERICAN SANDERS TECHNOLOGY
A.L. COOK TECHNOLOGY
Customer Service Headquarters and Factory
2100 Highway 265
Springdale, Arkansas 72764
[phone]
Technical Service
1-800-356-7274
U. S. A. Locations European Locations
HEAD OFFICE
ALTO U.S. Inc., St. Louis, Missouri
16253 Swingley Ridge Road, Suite 200
Chesterfield, Missouri 63017-1725
PRODUCTION FACILITIES
ALTO U.S. Inc., Springdale, Arkansas
2100 Highway 265
Springdale, Arkansas 72764
[phone]
Customer Service - 1-800-253-0367
Technical Service - 1-800-356-7274
ALTO U.S. Inc., Bowling Green, Ohio 43402
1100 Haskins
SERVICE FACILITIES
ALTO U.S. Inc., Carlstadt, New Jersey 07072
150 Commerce Road
[phone]
ALTO U.S. Inc., Elk Grove, Illinois 60007
2280 Elmhurst Road
[phone]
ALTO U.S. Inc., Denver, Colorado 80204
1955 West 13th Ave.
[phone]
ALTO U.S. Inc., Houston, Texas 77040
7215 North Gessner Road
SALES AND SERVICE FACILITIES
ALTO U.S. Inc., Madison Heights, Michigan 48071-0158
29815 John R.
[phone]
ALTO U.S. Inc., Marietta, Georgia 30062
1355 West Oak Common Lane
[phone]

CLARKE TECHNOLOGY WARRANTY
This ALTO Industrial/Commercial Product is warranted to be free from defects in materials and workman-
ship under normal use and service for a period of one year from the date of purchase, when operated and
maintained in accordance with Clarke's Maintenance and Operations Instructions.
This warranty is extended only to the original purchaser for use of the product. It does not cover normal wear
parts such as electrical cable, rubber parts, hoses and motor brushes.
If difficulty develops with the product, you should:
(a). Contact the nearest authorized Clarke repair location or contact the ALTO, CLARKE TECHNOLOGY
Service Operations Department, 2100 Highway 265, Springdale, Arkansas 72764, for the nearest authorized
Clarke repair location. Only these locations are authorized to make repairs to the product under this warranty.
(b). Return the product to the nearest Clarke repair location. Transportation charges to and from the repair
location must be prepaid by the purchaser.
(c). Clarke will repair the product and/or replace any defective parts without charge within a reasonable time
after receipt of the product.
Clarke's liability under this warranty is limited to repair of the product and/or replacement of parts and is
given to purchaser in lieu of all other remedies, including INCIDENTAL AND CONSEQUENTIAL DAMAGES.
THERE ARE NO EXPRESS WARRANTIES OTHER THAN THOSE SPECIFIED HEREIN. THERE ARE NO
WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION OF THE FACE HEREOF. NO WARRANTIES,
INCLUDING BUT NOT LIMITED TO WARRANTY OF MECHANTABILITY, SHALL BE IMPLIED. A warranty
registration card is provided with your Clarke product. Return the card to assist Clarke in providing the
performance you expect from your new floor machine.
ALTO, 2100 Highway 265, Springdale, Arkansas 72764.
CLARKE TECHNOLGOY reserves the right to make changes or
improvements to its machine without notice.
Always use genuine Clarke Parts for repair.
CLARKE TECHNOLOGY
2100 Highway 265
Springdale, Arkansas, 72764