Tennant 1520 607649 Product manual

Electric Automatic Carpet Extractor
1520
Model No.:
607649 Operator and Parts Manual
607311
Rev. 01 (10-01)
CUSTOMER SERVICE:
1–800-982–7658
1–616–786–2330
FAX: [phone]
1–616–786–3791
TENNANT COMPANY
Commercial Products
12875 RANSOM STREET
HOLLAND MI 49424 U.S.A.

OPERATION
2Tennant 1520 (10–01)
This manual is furnished with each new model. It
provides necessary operation and maintenance
instructions and an illustrated parts list.
Read this manual completely and understand the
machine before operating or servicing it.
When ordering replacement parts use the illustrated
Parts Lists in this manual. Before ordering parts or
supplies, be sure to have your machine model number
and serial number handy. Parts and supplies may be
ordered by phone or mail from any authorized Service
Center or Distributor.
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.
MACHINE DATA
Pleasefill out at time of installation for future reference.
Model No.-
Install. Date -
Serial No.-
E2001 Tennant Company Printed in U.S.A.
Specifications and parts are subject to change without notice.
TABLE OF CONTENTS
SAFETY PRECAUTIONS 3. . . . . . . . . . . . . . . . . . . .
GROUNDING INSTRUCTIONS 3. . . . . . . . . . .
MACHINE COMPONENTS 4. . . . . . . . . . . . . . . . . . .
CONTROL PANEL SYMBOLS 4. . . . . . . . . . . . . . .
MACHINE INSTALLATION 5. . . . . . . . . . . . . . . . . . .
UNCRATING MACHINE 5. . . . . . . . . . . . . . . . . .
MACHINE SETUP 5. . . . . . . . . . . . . . . . . . . . . . . . . .
FILLING SOLUTION TANK 5. . . . . . . . . . . . . . .
ADJUSTING CONTROL GRIP HEIGHT 5. . . .
CONNECTING MACHINE TO
POWER SOURCE 5. . . . . . . . . . . . . . . . . . . . . . .
MACHINE OPERATION 6. . . . . . . . . . . . . . . . . . . . .
PRE–OPERATION CHECKS 6. . . . . . . . . . . . . .
WHILE OPERATING MACHINE 7. . . . . . . . . . .
CIRCUIT BREAKERS 7. . . . . . . . . . . . . . . . . . . .
OPTIONAL ACCESSORY TOOL SETUP AND
OPERATION 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DRAINING TANKS 8. . . . . . . . . . . . . . . . . . . . . . . . . .
DRAINING RECOVERY TANK 8. . . . . . . . . . . .
DRAINING SOLUTION TANK 9. . . . . . . . . . . . .
MACHINE MAINTENANCE 9. . . . . . . . . . . . . . . . . .
DAILY MAINTENANCE 9. . . . . . . . . . . . . . . . . .
WEEKLY MAINTENANCE 10. . . . . . . . . . . . . . . .
MONTHLY MAINTENANCE 10. . . . . . . . . . . . . . .
QUARTERLY MAINTENANCE 11. . . . . . . . . . . .
TRANSPORTING MACHINE 11. . . . . . . . . . . . . . . . .
STORING MACHINE 11. . . . . . . . . . . . . . . . . . . . . . . .
RECOMMENDED STOCK ITEMS 11. . . . . . . . . . . . .
TROUBLE SHOOTING 12. . . . . . . . . . . . . . . . . . . . . .
SPECIFICATIONS 13. . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRICAL DIAGRAMS 14. . . . . . . . . . . . . . . . . . .
WIRE DIAGRAM 120V 14. . . . . . . . . . . . . . . . . . .
LADDER DIAGRAM 120V 15. . . . . . . . . . . . . . . .
PARTS LIST 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SOLUTION TANK GROUP 16. . . . . . . . . . . . . . . .
RECOVERY TANK GROUP 18. . . . . . . . . . . . . . .
LIFT GROUP 20. . . . . . . . . . . . . . . . . . . . . . . . . . .
BRUSH BASE GROUP 22. . . . . . . . . . . . . . . . . . .
DRIVE GROUP 23. . . . . . . . . . . . . . . . . . . . . . . . .
PLUMBING GROUP 24. . . . . . . . . . . . . . . . . . . . .
CONSOLE GROUP 26. . . . . . . . . . . . . . . . . . . . . .
ELECTRICAL GROUP 28. . . . . . . . . . . . . . . . . . .
OPTIONS 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SOLUTION AND VACUUM HOSES 29. . . . . . . .
127 mm (5 in) HAND TOOL 30. . . . . . . . . . . . . . .
76 mm (3 in) CREVICE TOOL 30. . . . . . . . . . . . .
LOW PRESSURE UPHOLSTERY TOOL 31. . .
330mm (13 in) LOW PRESSURE
FLOOR TOOL 32. . . . . . . . . . . . . . . . . . . . . . . . . . .
406mm (16 in) LOW PRESSURE
FLOOR TOOL 34. . . . . . . . . . . . . . . . . . . . . . . . . . .

OPERATION
Tennant 1520 (10–01) 3
SAFETY PRECAUTIONS
This machine is intended for commercial use. It is
designed to clean carpets in an indoor environment
and is not constructed for any other use. Use only
recommended cleaning solutions.
All operators must read, understand, and practice the
following safety precautions:
The following safety alert symbols are used throughout
this manual as indicated in their descriptions:
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 following information signals potentially dangerous
conditions to the operator or equipment:
FOR SAFETY:
1. Do not operate machine:
–Unless trained and authorized.
–Unless operator manual is read and
understood.
–In flammable or explosive areas.
–Unless cord is properly grounded.
–With damaged cord or plug.
–If not in proper operating condition.
–In outdoor areas.
–In standing water.
–With the use of additional extension cords.
Only use manufacturer’s extension cord
equipped with machine which has proper
capacity and is grounded.
2. Before operating machine:
–Make sure all safety devices are in place
and operating properly.
3. When using machine:
–Do not run machine over cord.
–Do not pull machine by plug or cord.
–Do not pull cord around sharp edges or
corners.
–Do not unplug by pulling on cord.
–Do not stretch cord.
–Do not handle plug with wet hands.
–Keep cord away from heated surfaces.
–Go slow on inclines and slippery surfaces.
–Report machine damage or faulty
operation immediately.
–Do not carry riders on machine.
–Follow mixing and handling instructions
on chemical containers.
4. Before leaving or servicing machine:
–Stop on level surface.
–Turn off machine.
–Unplug cord from wall outlet.
5. When servicing machine:
–Unplug cord from wall outlet.
–Avoid moving parts. Do not wear loose
jackets, shirts, or sleeves.
–Block machine tires before jacking up.
–Use hoist or jack of adequate capacity to
lift machine.
–Use manufacturer supplied or approved
replacement parts.
WARNING: Hazardous Voltage. Shock or
electrocution can result. Unplug machine before
servicing.
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 pick
up.
GROUNDING INSTRUCTIONS
Machine must be grounded. If it should
malfunction or breakdown, grounding provides a
path of least resistance for electrical current to
reduce the risk of electrical shock. This machine
is equipped with a cord having an
equipment–grounding conductor and grounding
plug. The plug must be plugged into an
appropriate outlet that is properly installed in
accordance with all local codes and ordinances.
Do not remove ground pin; if missing, replace
plug before use.
Grounded
3 Hole Outlet
Ground Pin

OPERATION
4Tennant 1520 (10–01)
MACHINE COMPONENTS
1
7
36
5
4
17
15
21
14
24
23
28
27
25
26
29
22
12
10
9
18
19
11
20
8
2
16
13
1. Control Console
2. Control Roll Grips
3. Main ON/OFF Switch
4. Pump ON/OFF Switch
5. Vacuum ON/OFF Switch
6. Brush/Pickup Head UP/DOWN Switch
7. Interim/Restorative Switch
8. Speed Control Knob
9. Brush Motor Circuit Breaker
10. Drive Motor Circuit Breaker
11. Intake Vacuum Hose
12. Brush/Pickup Head Actuator
13. Adjustable Control Console Levers
14. Recovery Tank Drain Hose
15. Solution Tank Drain Hose
16. 19 L (5 Gal) Increment Markers
17. Rear Fill Port
18. Inline Solution Filter Strainer
19. Accessory Solution Hose Coupler
20. Accessory Vacuum Hose Connecter
21. Recovery Tank
22. Recovery Tank Lid
23. Solution Tank
24. Solution Tank Fill Door
25. Drive Wheels
26. Rear Casters
27. Wall Rollers
28. Pickup Head
29. Brush Base
N/S.Power Cord (not shown)
CONTROL PANEL SYMBOLS
MainPower
Vacuum
Brush Up
Brush Down
Fast Speed
Slow Speed
Read Manual
Before Operating
Interim
Cleaning
Solution
Pump
Restorative
Cleaning

OPERATION
Tennant 1520 (10–01) 5
MACHINE INSTALLATION
UNCRATING MACHINE
Carefully check carton for signs of damage. Report
any damage at once to carrier.
To uncrate your machine, remove shipping straps and
carefully lift or make a ramp using crate boards to
remove machine from pallet.
ATTENTION: Do not roll machine off pallet,
damage may occur.
MACHINE SETUP
FILLING SOLUTION TANK
1. Push machine to filling station. Raise brush/pickup
head when transporting.
2. Open solution fill door at front of machine and fill
solution tank with up to 98L (26 gal) of clean water,
60°C (140°F) maximum temperature. Or you can
use the rear fill port to fill solution tank. Twist off plug
and insert hose to fill. The clear tube below the fill
port has 19L (5 gal) increment markers to indicate
amount of water in tank (Figure 1).
FIG. 1
WARNING: Flammable materials can cause
an explosion or fire. Do not use flammable
materials in tank(s).
ATTENTION: If filling with a bucket, be certain that
the bucket is clean to prevent solution line clogs.
3. Add the proper amount of cleaning chemical.
NOTE: Pre-spraying chemical by use of a pump-
up sprayer may be used as an alternative.
FOR SAFETY: When using machine, follow mixing
and handling instructions on chemical containers.
ATTENTION: Use only recommended cleaning
chemicals, DO NOT use substitutes. Consult an
authorized distributor for recommendations.
ADJUSTING CONTROL GRIP HEIGHT
The machine has three control grip height settings.
1. Locate two spring loaded levers below console.
2. Squeeze levers together and lift or lower control
grips to a comfortable operating height (Figure 2).
FIG. 2
CONNECTING MACHINE TO POWER SOURCE
1. Connect the 23 m (75 ft) extension cord into the
machine’s pigtail cord.
2. Plug extension cord into a grounded wall outlet
(Figure 3).
Grounded
3 Hole Outlet
Ground Pin
FIG. 3
FOR SAFETY: Do not operate machine unless
cord is properly grounded.
FOR SAFETY: Do not operate machine with the
use of additional extension cords. Only use
manufacturer’s extension cord equipped with
machine which has proper capacity and is
grounded.
3. Attach belt clip to power cord (Figure 4).
FIG. 4

OPERATION
6Tennant 1520 (10–01)
MACHINE OPERATION
PRE–OPERATION CHECKS
SVacuum floor and remove any debris.
SInspect power cord for damage. Make sure power
cord is properly grounded.
SCheck that spray bar is installed (See Weekly
Maintenance).
SCheck that inline strainer filter is installed.
SInspect spray tips for proper spray pattern
(See Weekly Maintenance).
FOR SAFETY: Do not operate machine unless
operator manual is read and understood.
1. Turn main power switch on.
2. Lower brush to floor by depressing the
Brush/Pickup Head UP/DOWN switch (Figure 5).
FIG. 5
3. Position the Interim/Restorative switch to the
desired cleaning mode (Figure 6).
FIG. 6
Interim Cleaning Mode: Use this mode
for routine carpet surface cleaning. This mode will
allow you to operate the machine up to a cleaning
pace of approximately 30m (100 ft) per minute.
NOTE: Restorative cleaning must be done on a
regular basis in order for interim cleaning to be
effective.
Restorative Cleaning Mode: Use this
mode for restoring heavily soiled carpet areas.
You must operate the machine at a cleaning pace
of approximately 15m (50 ft) per minute for
optimum cleaning results. Turn the speed control
knob just shy of half way for a pace of
approximately 15m (50 ft) per minute.
NOTE: The solution flow rate is regulated per cleaning
mode. Interim Cleaning Mode = 2.3L (77 oz.) per
minute. Restorative Cleaning Mode= 4.1 L (139 oz.)
per minute.
4. Turn the vacuum and pump switches on.
NOTE: The brush and pump will start once control
grips are rotated.
5. Before you begin cleaning, turn speed control
knob to slowest speed (Figure 7).
FIG. 7
6. To begin cleaning, rotate control grips completely
forward and gradually turn speed control knob to
desired cleaning speed (Figure 7).
WARNING: Flammable materials or reactive
metals can cause an explosion or fire. Do not pick
up.
7. To stop machine, release control grips.
8. After cleaning carpets, allow sufficient time for
carpet to dry. Use a carpet blower to reduce drying
time.

OPERATION
Tennant 1520 (10–01) 7
WHILE OPERATING MACHINE
1. Periodically check for foam buildup in recovery
tank (look through clear lid). If excessive foam
buildup begins to develop, pour a recommended
foam control solution into recovery tank.
ATTENTION: Do not allow foam or water to enter
float shut–off screen, vacuum motor damage will
result. Foam will not activate float shut–off
screen. Vacuum motor damage due to foam or
water is not covered under the warranty.
2. Always operate at a slower speed when cleaning
around walls or obstacles.
3. Always reduce speed to maintain control when
turning machine.
4. Overlap each pass by 50mm (2 in).
5. Before reaching end of cleaning path, turn off
pump switch and continue to drive machine
forward to extract solution.
6. While cleaning, view clear hose gallon marker for
remaining cleaning solution. Each mark on hose
indicates 19L (5 gal).
7. When solution tank runs dry, turn off pump and
vacuum switches, raise brush, and transport
machine to draining area (See Draining Tanks).
8. If the cleaning path leaves streaks, spray tip
cleaning is required (See Weekly Maintenance).
WARNING: Flammable materials or reactive
metals can cause an explosion or fire. Do not pick
up.
FOR SAFETY: When using machine, do not run
machine over cord. Do not pull cord around sharp
edges or corners and do not stretch cord.
CIRCUIT BREAKERS
The machine is equipped with two circuit breakers, Drive
Motor (4.5 Amp –resettable) and Brush Motor (2.0 Amp
–resettable), to protect machine from damage. If a
circuit breaker should trip, determine cause, allow motor
to cool and then manually reset breaker (Figure 8).
FIG. 8
OPTIONAL ACCESSORY TOOL SETUP
AND OPERATION
Machine is equipped with accessory tool connections.
Accessory tool enables you to reach areas that the
machine is unable, such as alcoves, stairs and corners
(See Options at back of manual).
1. Vacuum area before cleaning.
2. Fill solution tank and add cleaning chemical (See
Filling Solution Tank). NOTE: Pre-spraying
chemical by use of a pump- up sprayer may be
used as an alternative.
WARNING: Flammable materials can cause
an explosion or fire. Do not use flammable
materials in tank(s).
3. Disconnect lower vacuum hose at rear of machine
and replace with accessory vacuum hose
(Figure 9).
FIG. 9
4. Connect solution hose to accessory tool coupler,
located at lower rear of machine (Figure 10).
FIG. 10

OPERATION
8Tennant 1520 (10–01)
5. Connect accessory tool to solution hose and
vacuum hose (Figure 11).
FIG. 11
6. Plug cord into a grounded wall outlet.
FOR SAFETY: Do not operate machine unless
cord is properly grounded.
7. Turn on main, pump and vacuum switches.
8. Take accessory tool and begin cleaning at top of
area and work backwards toward machine.
WARNING: Flammable materials or reactive
metals can cause an explosion or fire. Do not pick
up.
9. Place accessory tool head on area to be cleaned;
squeeze trigger, apply downward pressure on
accessory tool head, and slowly pull tool
backwards. Release trigger 152mm (6 in) from
end of stroke (Figure 12).
FIG. 12
10. When returning for next stroke, push accessory
tool forward over same path with trigger released.
Continue this pull and push method with a 2 to 4
in. overlap of each stroke.
NOTE: For heavily soiled areas, repeat stroke or
change angle of stroke.
11. Empty recovery tank when solution tank runs dry
(See Draining Tanks).
ATTENTION: Do not allow foam or water to enter
vacuum standpipe, vacuum motor damage will
result. Float shut-off screen will not keep foam
out of standpipe. Vacuum damage due to foam or
water is not covered by warranty.
DRAINING TANKS
WARNING: Hazardous voltage. Shock or
electrocution can result. Unplug machine before
servicing.
NOTE: Raise brush/pickup head when transporting
machine to floor drain.
DRAINING RECOVERY TANK
Always empty recovery tank each time you refill
solution tank. To drain recovery tank, perform the
following steps:
ATTENTION: If recovery tank is not emptied
between fill–ups, foam or water will enter vacuum
standpipe and damage vacuum motor. Float
shut–off screen will not keep foam out of
standpipe.
1. Turn machine off and unplug cord from wall outlet.
2. Remove drain hose from holder, position hose
over floor drain and twist off drain hose plug. To
completely drain recovery tank, hinge open tank
and flip up tank support stand to rest tank on
(Figure 13).
NOTE: If using a bucket for filling and draining make
sure you use different buckets. This will prevent
possible solution line clogs.
FIG. 13
3. Rinse out recovery tank after each use. This will
prevent a foul odor and residue buildup in tank.
Unscrew clear lid on recovery tank and rinse out
the tank with hose. Be careful not to spray water
into float shut–off screen.
4. Replace drain hose plug tightly when tank is
empty.

OPERATION
Tennant 1520 (10–01) 9
DRAINING SOLUTION TANK
To drain leftover cleaning solution from solution tank,
follow steps below:
1. Turn machine off and unplug cord from wall outlet.
2. Pull clear hose off hose barb at rear of machine
and drain solution into floor drain or bucket
(Figure 14).
FIG. 14
3. Rinse out solution tank and solution system with
clean water after each use. This will prevent
clogging due to chemical buildup. Use clear hose
to drain solution tank when rinsing.
4. When reconnecting clear hose to hose barb, be
certain hose is completely pushed onto hose barb.
MACHINE MAINTENANCE
To keep machine in good working condition, simply
follow the daily, weekly, and monthly maintenance
procedures.
WARNING: Hazardous voltage. Shock or
electrocution can result. Unplug machine before
servicing.
ATTENTION: Contact an Authorized Service
Center for machine repairs. Machine repairs
performed by other than an authorized person will
void your warranty.
DAILY MAINTENANCE
(Every 4 Hours of Operation)
1. Inspect power cord and cord grip for damage.
Replace if damaged.
2. Always coil extension cord neatly after each use.
3. Remove float shut–off screen and rinse off.
Screen is located in recovery tank (Figure 15).
FIG. 15
4. Drain and rinse tanks thoroughly. After draining
tanks, hinge recovery tank open and remove any
clogging debris in inlet hole if necessary.
5. Clean machine housing with a nonabrasive,
nonsolvent cleaner.
6. Inspect brush for entangled debris.

OPERATION
10 Tennant 1520 (10–01)
WEEKLY MAINTENANCE
(Every 20 Hours of Operation)
1. Remove inline strainer filter and rinse out. Make
sure solution tank is empty before removing filter.
Filter is located under machine at rear (Figure 16).
FIG. 16
2. Inspect spray tips for proper spray pattern:
a. Lower brush/pickup head and remove
detachable spray bar from brush base. Do not
disconnect bar from quick coupler. Raise
brush after removing spray bar (Figure 17).
b. Turn the speed control knob to slowest setting
to minimize machine travel during inspection.
c. Turn the main power and pump switches on.
d. Holding the spray bar off the floor, briefly
rotate control grips and observe spray pattern.
Pattern should fan out evenly across the width
of the spray bar (Figure 17).
e. Clean or replace defective twist-out spray tips
if necessary (See Monthly Maintenance).
FIG. 17
MONTHLY MAINTENANCE
(Every 80 Hours of Operation)
1. Flush chemical buildup from tanks and solution
lines. Follow procedure below:
a. Drain all water from machine.
b. Over a floor drain, carefully jack up the
machine so the drive wheels are just off the
floor. Use a block of wood for jacking. Make
sure to stay clear of the brush area when
jacking (Figure 18). The machine drive wheels
must spin freely during the flushing procedure.
89mm
(3.5 in)
FIG. 18
c. Pour 750 ml (24 oz) of an acetic acid solution
with 11.3 ltr (3 gal) of hot water into solution
tank; do not exceed 60_C (140_F).
FOR SAFETY: When using machine, follow mixing
and handling instructions on chemical containers.
WARNING: Flammable materials can cause
an explosion or fire. Do not use flammable
materials in tank(s).
d. Turn on the main and pump switches and
select the Restorative Cleaning Mode.
e. Rotate the control grips and hold for one to
two minutes. As a safety precaution, turn the
speed control knob to the slowest setting.
f. Shut off power, unplug machine and let
machine set overnight to allow acetic acid
solution to breakdown chemical buildup.
g. Next day, while machine is still jacked up,
disperse remaining acetic acid solution.
h. Then rinse out solution tank and solution lines
with clean water.

OPERATION
Tennant 1520 (10–01) 11
2. Remove detachable spray bar from brush base.
Remove twist-out spray tips from spray bar and
soak in 118ml (4 oz) acetic acid solution for up to
6 hours. After soaking tips, use a small brush to
remove excess alkaline and rinse thoroughly. DO
NOT use pointed objects to unplug spray tips
(Figure 19).
FIG. 19
3. Lubricate caster grease fittings with a water
resistant grease.
4. Lubricate all linkage pivot points with silicone
spray, then coat with a water resistant grease to
maintain a smooth operation.
5. Check machine for water leaks and loose nuts and
bolts.
QUARTERLY MAINTENANCE
(Every 250 Hours of Operation)
Check drive and vacuum motors for carbon brush
wear, replace brushes if worn to a length of 10mm
(0.38 in) or less.
Contact an Authorized Service Center for motor
maintenance.
TRANSPORTING MACHINE
When transporting machine by use of trailer or truck,
be certain to follow tie–down procedures below:
FOR SAFETY: When using machine, go slow on
inclines and slippery surfaces.
1. Raise brush/pickup head.
2. Carefully load machine using a recommended
loading ramp.
3. Position front of machine up against front of trailer
or truck. Place a block behind each drive wheel to
prevent machine from rolling.
5. Secure machine with tie-down straps. It may be
necessary to install tie-down brackets to the floor
of your trailer or truck.
NOTE: Do not use the control grips to secure machine
for transporting.
STORING MACHINE
1. Before storing machine, rinse tanks and drain
machine of all water.
2. Store machine in a dry area.
3. Remove recovery lid to promote air circulation.
4. Raise the brush/pickup head off the floor.
5. If storing machine in freezing temperatures, be
certain to circulate an undiluted anti-freeze
solution throughout the machine.
ATTENTION: Do not allow machine to freeze
without antifreeze. Damage due to freezing
temperatures is not covered by warranty.
ATTENTION: Do not expose machine to rain and
store indoors.
RECOMMENDED STOCK ITEMS
Refer to Parts List section for recommended stock
items. Stock Items are clearly identified with a bullet
preceding the parts description. See example below:

OPERATION
12 Tennant 1520 (10–01)
TROUBLE SHOOTING
PROBLEM CAUSE SOLUTION
No power Faulty main power switch. Contact Service Center.
Power cord disconnected. Connect power cord.
Faulty power supply cord. Replace power supply cord.
Building circuit breaker has tripped. Determine cause and reset circuit breaker
in building.
Brush motor does not Pump switch is not activated. Turn on pump switch.
operate Control grips are not rotated. Rotate control grips.
Brush circuit breaker has tripped. Remove obstruction from brush and reset
brush circuit breaker button.
Faulty brush motor or wiring. Contact Service Center.
Carbon brushes worn. Contact Service Center.
Loose or broken belt. Replace, or contact Service Center.
Vacuum motor does not Faulty vacuum switch. Contact Service Center.
operate Vacuum motor thermal overload activated. Remove obstruction and wait 20 minutes
for motor to cool.
Faulty vacuum motor or wiring. Contact Service Center.
Carbon brushes worn. Contact Service Center.
Drive motor does not Drive motor circuit breaker has tripped. Determine cause and reset breaker.
operate Faulty speed control board or connection. Contact Service Center.
Faulty drive motor. Contact Service Center.
Faulty wiring. Contact Service Center.
Worn carbon brushes. Contact Service Center.
Drive motor operates, but
not correctly Faulty potentiometer or speed control board. Contact Service Center.
Loose wire connection. Contact Service Center.
Uneven or no solution spray Twist–out spray tips are plugged. Remove and clean.
Control grips are not rotated. Rotate control grips.
Solution line or solution tank filter is
clogged. Remove hose and blow compressed air through it. Flush solution tank after each
use.
Inline strainer filter is plugged. Drain solution tank, remove filter and
clean. Located under machine at rear.
Faulty pump switch. Contact Service Center.
Faulty pump or solenoid. Contact Service Center.

OPERATION
Tennant 1520 (10–01) 13
TROUBLE SHOOTING –Continued
PROBLEM CAUSE SOLUTION
Poor vacuum recovery Recovery tank is full. Empty recovery tank.
Float shut–off screen inside recovery
tank is clogged. Remove screen and clean.
Pickup head is clogged with debris. Remove debris, use coat hanger.
Pickup head is not sealed to carpet. Adjust pickup head.
Faulty actuator. Contact Service Center.
Vacuum hose connections are loose or
hose has a hole. Push hose cuffs firmly on connections. Replace hose if damaged.
Vacuum hose is clogged with debris. Remove clogged debris.
Recovery tank inlet hole is obstructed. Empty recovery tank and tilt tank sideways
to access inlet hole, remove obstruction.
Tank gasket is defective. Replace gasket.
Drain hose plug is loose. Tighten drain plug.
Recovery tank lid is loose. Tighten lid.
Vacuum motor is loose. Contact Service Center.
SPECIFICATIONS
MODEL 1520
LENGTH 1270 mm (50 in)
WIDTH 559 mm (22 in)
HEIGHT 990 mm (39 in)
WEIGHT 124 Kg (273.5 lb)
SOLUTION TANK CAPACITY 98 L (26 Gal)
RECOVERY TANK CAPACITY 64 L (17 Gal)
SPEED CONTROL Variable Fwd.
CLEANING SPEED (MAX) 418.05 m2(4,500 sq ft) per hour (Interim Cleaning Mode)
CLEANING PATH WIDTH 559 mm (22 in)
PAD PRESSURE Variable 36–68 Kg (80–150 lb)
SOLUTION PUMP 6.9 bar (100 psi) max., 120V
SOLUTION FLOW RATES Interim Cleaning Mode = 2.3L (77 oz.) per minute.
Restorative Cleaning Mode= 4.1 L (139 oz.) per minute.
DRIVE SYSTEM Transaxle, .2 hp, 72 rpm, 120V
BRUSH MOTOR .12hp, 1800 rpm, 120V, .75A, 90W
VACUUM MOTOR 1.8hp, 3–stage 5.7 in, 120V, 11A, 1320W
WATER LIFT 3048 mm (120 in)
DECIBEL RATING AT OPERATOR’S EAR, INDOORS ON
CARPET 84dB(A)
POWER CORD LENGTH 23 m (75 ft)

ELECTRICAL DIAGRAMS
Tennant 1520 (10–01)
14
WIRE DIAGRAM 120V
15 WHT
16
BLK
BRN
BLK
10
12
BLK WHT
14 15
RED
RED
29
BLU
22
BLK
WHT
BLK
BLK
24
BLK
6
10
BLK
BLK 32
GRY 18
ORG RED WHT
ORG RED WHT
RED
30
26
RED
25
BLU
BRN
38
ORG
WHT/
ORG
20 17
BLU 22
44BLU
24
BLK
ORG
17 WHT/ORG
20
13
30 RED
32
29
BRN
16
PNK 19
25
BLU
36 21
40
BRN
38
23
40
11
WHT
BLK
BLK
4
BLK
2
833
1
3
WHT
WHT
33
13
27
7WHT/
RED
RED
26
36
21
31
6
31
5
5
9
7
WHT/
RED
21
36
44
BLU
BRN
38
25
BLU
36 21
2
BLK
RED
WHT
WHT
WHT
WHT
WHT
BLK
BLK
BLK
WHT/
RED
RED
BLK
42 35
28
28
BLU
44
BLU
YEL
42
42 YEL
WHT/
BLK
42 YEL
44
YEL
BLU
44
YEL
MAIN
ACTUATOR
MOTOR
DRIVE
MOTOR
AMP
C B
AMP
C B
VACUUM
MOTOR
PUMP
BRUSH
MOTOR
ACTUATOR
VACUUM
BRUSH
ROLL
SWITCH
5K
POTENTIOMETER
SOL\
BRUSH
SPEED
CONTROL
BOARD
BRIDGE
RECTIFIER
(BRUSH)
BRIDGE
RECTIFIER
(ACTUATOR)
RESTORATIVE
SOLENOID
DRIVE
ROLL
SWITCH
SPEED CONTROL
ADJUSTMENT
INTERIM
SOLENOID
INTERIM /
RESTORATIVE
AC
AC
AC
AC
8
4.5 2.0

ELECTRICAL DIAGRAMS
Tennant 1520 (10–01) 15
LADDER DIAGRAM 120V
G
DRIVE
MOTOR
ACTUATOR
PUMP
G
BRUSH
G
VACUUM
BLK WHT 120 VAC
-8-
-BLK-
-10-
-BLK-
DRIVE DRIVE ROLL
SWITCH
-14- -BLK-
-1- -WHT-
-15- -WHT-
-19-
-PNK-
-18- -GRY-
-29-
-RED-
-29- -RED-
-16- -BRN-
-9- -WHT-
5K
POTENTIOMETER
O
R
G
R
E
D
W
H
T
SPEED
CONTROL
BOARD
-9- -WHT-
-6- -BLK-
-31- -WHT-
-21- -BLK-
-40-
-RED-
-36-
-RED-
-23-
-BLK-
-25- -BLU-
-38- -BRN-
-2- -BLK-
-30-
-RED-
SOLUTION/
BRUSH
-3- -WHT- -3- -WHT-
-26- -RED- -7- -WHT/RED-
-28- -BLU-
BRUSH ROLL
SWITCH
-24-
-BLK-
-22- -BLU-
-20- -ORG-
-13- -WHT-
-5- -WHT-
-32- -BLK-
-11- -WHT-
-11- -WHT-
-4- -BLK-
VACUUM
-13- -WHT-
-17- -WHT/ORG-
-27- -WHT/RED-
-31- -WHT-
RESTORATIVE
BRUSH
-35- -WHT/BLK-
INTERIM
-44- -BLU-
-42- -YEL-
-9-
W
H
T
4.5A
2.0A
Ć12Ć Ć BLKĆ

PARTS LIST
Tennant 1520 (10–01)
16
SOLUTION TANK GROUP
28
2
3
13
15
16
9
17
10 11
24
26
27
23
22 9
10
11
29
30
31
32
30
36
33
41
4
6
5
1
38
39
37
38
37
25
34
35
42
43
44
43
42
20
18
19
19
40
12
21
18
14

PARTS LIST
Tennant 1520 (10–01) 17
SOLUTION TANK GROUP
REF PART # DESCRIPTION QTY.
1 607515 COVER, TANK, TEAL 1
2 611068 HINGE, COVER 1
3 140706 RIVET, POP 7
4 602529 SCREEN, FILL 1
5 3701.6 SCREW, #6X3/4 2
6 140032 WASHER, FLAT #6 2
7 230661 PLATE, LOCK CONTROL HOUSING 2
8 611979 WELDMENT, DRAIN HOSE 1
9 140027 WASHER, FLAT 5/16 3
10 140015 WASHER, LOCK 5/16 3
11 200031488 SCREW, M8X20MM 3
12 604308 TANK, SOLUTION 10GAL 1
13 630010 DGASKET 1
14 630011 TUBE, ADAPTER 1
15 630267 SPRING, COMP 1
16 630016 RING, RETAINING 1
17 608706 BRACKET, VAC TUBE 1
18 150516 FITTING, 1/4MX3/8H BARB 2
19 140310 CLAMP, HOSE 5/16 –7/8 2
20 607308 HOSE, 3/8”X 8”1
21 604265 COUNTERWEIGHT 34LBS 1
22 611418 SLEEVE 1
DRECOMMENDED STOCK ITEMS
REF PART # DESCRIPTION QTY.
23 230925 SUPPORT, RECOVERY TANK 1
24 600476 STRAP, PLUG 1
25 621324 DPLUG, EXPANSION 1
26 140011 WASHER, FLAT 3/16 1
27 140350 SCREW, #10X1/2 1
28 608154 DECAL, 1520 2
29 607552 TANK, SOLUTION, TEAL 1
30 150529 FITTING, 3/4MX3/4H 2
31 607983 HOSE, W/LEVEL INDICATORS 1
32 608915 CLAMP, HOSE 2 WIRE 1
33 612056 CASTER 4”2
34 140036 WASHER, FLAT 3/8 8
35 140333 WASHER, LOCK M10 8
36 140277 SCREW, M10X20MM 8
37 150419 ELBOW, 1/4M X 3/8H 90°2
38 140310 CLAMP 2
39 607310 HOSE, 3/8”X 17.5”1
40 600730 DECAL, RECESS 1
41 120192 DECAL, “TENNANT”1
42 150530 FITTING, 1”MX1–1/4H BARB 2
43 608915 CLAMP, HOSE 2 WIRE 2
44 604279 HOSE, DRAIN 1

PARTS LIST
Tennant 1520 (10–01)
18
RECOVERY TANK GROUP
1
5
28
12
2
3
4
611
9
10
13
15 14
16
20
21
25
24
15
14
13
22
14
15
13
8
7
23
32
33
31
30
34
17
18
19
26
27
29
9

PARTS LIST
Tennant 1520 (10–01) 19
RECOVERY TANK GROUP
REF PART # DESCRIPTION QTY.
∇1 701103 ASM., STANDPIPE 1
Y2 606088 NIPPLE 1
3 101714 DGASKET 1
4 210240 NUT, FLANGED 1
5 180613 DFLOAT, SHUT–OFF 1
∇6 100102 DASM., LID CLEAR W/STD HOLE 1
Y7 100105 DLID, CENTER CLEAR ONLY 1
Y8 100109 DLID, OUTER RING ONLY 1
9 140826 SCREW, #6X3/4 7
10 3701.6 SCREW, #6X3/8 1
11 230513 ASM., CHAIN 1
12 607554 TANK, RECOVERY, TEAL 1
13 578187000 SCREW, M6X12MM 12
14 140052 WASHER, LOCK 1/4 12
15 140000 WASHER, FLAT 1/4 15
16 140960 CABLE, SUPPORT 1
17 140027 WASHER, FLAT 5/16 1
18 140015 WASHER, LOCK 5/16 1
∇ASSEMBLY
YINCLUDED IN ASSEMBLY
DRECOMMENDED STOCK ITEMS
REF PART # DESCRIPTION QTY.
19 200031488 SCREW, M8X20MM 1
20 100038 DGASKET, VAC MOTOR 1
21 130996 DMOTOR, VAC 5.7 /3 STAGE 120V 1
602741 CARBON BRUSH, SET OF 2 2
22 140353 M6X108 STUD 3
23 130133 TERMINAL, MALE DSCNT 2
24 140284 NUT, M6 3
25 140000 WASHER, FLAT 3
26 120906 DECAL, IMPORTANT DRAIN... 1
27 578729 DECAL, READ MANUAL 1
28 600311 DHINGE, RECOVERY TANK 1
∇29 603217 ASM., DRAIN HOSE 1
Y30 621324 PLUG, EXPANSION 1
Y31 578441 STRAP 1
Y32 630394 SLEEVE 1
Y33 630068 HOSE, DRAIN 1
Y34 140308 CLAMP 1

PARTS LIST
Tennant 1520 (10–01)
20
LIFT GROUP
1
22
6
7
89
18
3
4
5
17
19
20
12
11
40
13
15
14 16
21
22
23
24 22
2526 27
28 29
28
31
50
47
32
34
36
37
30
38
39 27
33
15
42
41 24
43
22
25
26
45
3
4
5
3
46
10
47
44
15
14
35
11
28
31
27
28
22
19
20
7
48
14
15
16
8
9
7
24
22
2
21
22
26
25
24
49