Tennant EC-H2O T12 Operating and installation instructions

T12
9009917
Rider Scrubber
Service Information Manual
9009917
Rev. 00 (12-2012)
(Battery)
North America / International
To view, print or download
the latest parts or operator’s
manual, visit:
ww
w
.tennantco.com/manuals
The Safe Scrubbing AlternativeR
TennantTrueRParts
IRISta Tennant Technology

INTRODUCTION
This manual providesnecessary service and maintenance instructions.
Read thismanual completely and understand
the machine before servicing it.
This machinewill 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 maintainedwith manufacturer supplied or equivalentparts.
PROTECT THE ENVIRONMENT
Please dispose of packaging materials,
old machine components and fluids in
an environmentally safe way according
to local waste disposal regulations.
Always remember to recycle.
ModelNo. --
SerialNo. --
InstallationDate --
Please fillout at time of installation for future reference.
MACHINE DATA
INTENDED USE
The T12 is an industrial/commercial rider machinedesigned to wet scrub both roughand smooth hard surfaces
(concrete, tile, stone, synthetic, etc). Typical applicationsinclude schools, hospitals / health care facilities, office
buildings, and retail centers. Do not use this machine on soil, grass, artificial turf, or carpeted surfaces. This machine
is intended for indoor use only. This machine is notintended for use on public roadways.
Tennant Company
PO Box 1452
Minneapolis, MN 55440
Phone: [phone] or (763)513--2850
www.tennantco.com
Touch--N--Go, 1--STEP, Grip--N--Go, Dura--Track, SmartRelease, Duramer, are US registered andunregistered trademarks of Tennant Company.
Flow-Rite is a registered trademark of Flow-Rite Controls
Specificationsandparts are subject to change withoutnotice.
Original Instructions, copyrightE2013 TENNANT Company, Printed in U.S.A.

T12 Service Information 9009917 (12-12) 3
CONTENTS
SAFETY PRECAUTIONS .......................11
GENERAL INFORMATION ..................... 21
COMPONENT LOCATOR.................... 22
ELECTRICAL SCHEMATIC, MASTER ......... 24
ELECTRICAL SCHEMATIC SYMBOLS ..... 29
OPERATIONAL MATRIX....................210
SPECIFICATIONS ..........................212
FASTENER TORQUE ....................212
MACHINE DIMENSIONS................213
GENERAL MACHINE DIMENSIONS/
CAPACITIES .........................214
GENERAL MACHINE PERFORMANCE ...214
POWER TYPE ..........................215
TIRES ..................................215
ECH2O SYSTEM OPTION .............215
ELECTRICAL COMPONENTS............216
MAINTENANCE
MAINTENANCE CHART..................... 32
LUBRICATION .............................. 34
BATTERIES ................................. 35
CHARGING THE BATTERIES
OFFBOARD CHARGER ............. 36
CHARGING THE BATTERIES
ONBOARD CHARGER .............. 37
ONBOARD CHARGER ERROR CODES ... 38
ONBOARD CHARGER SETTINGS ........ 39
CHANGING THE ONBOARD BATTERY
CHARGER FUSE .....................310
FLOWRITE™BATTERY
WATERING SYSTEM .................311
CIRCUIT BREAKERS .......................313
ELECTRIC MOTORS .......................314
SCRUB BRUSHES..........................315
DISK BRUSHES AND PADS .............315
REPLACING DISK BRUSHES
OR PAD DRIVERS ................315
REPLACING DISK SCRUB PADS ......316
CYLINDRICAL BRUSHES................317
REPLACING CYLINDRICAL
BRUSHES .........................317
CHECKING CYLINDRICAL SCRUB
BRUSH PATTERN..................318
ADJUSTING CYLINDRICAL
BRUSH TAPER ....................321
ADJUSTING CYLINDRICAL BRUSH
PATTERN WIDTH..................322
SIDE BRUSH OPTION ....................323
REPLACING THE SIDE BRUSH...........323
SQUEEGEE BLADES .......................324
REPLACING OR ROTATING THE
Contents Page
REAR SQUEEGEE BLADES ...........324
LEVELING THE REAR SQUEEGEE........327
ADJUSTING THE REAR SQUEEGEE
BLADE DEFLECTION ................328
REPLACING OR ROTATING THE SIDE
SQUEEGEE BLADES .................329
REPLACING OR ROTATING THE SIDE BRUSH
SQUEEGEE BLADES OPTION .......330
SKIRTS AND SEALS........................331
BELTS ..................................331
TIRES ..................................331
PUSHING, TOWING, AND TRANSPORTING
THE MACHINE .........................333
MACHINE JACKING .......................335
ec-H2O MODULE FLUSH PROCEDURE .....336
STORAGE INFORMATION..................338
FREEZE PROTECTION ..................338
PREPARING THE MACHINE FOR
OPERATION AFTER STORAGE .......340
PRIMING THE ECH2O SYSTEM .........3-42
TROUBLESHOOTING
ONBOARD DIAGNOSTICS .................. 42
SELFTEST MODE ....................... 42
CONFIGURATION MODE ................ 44
LCD WARNINGS......................... 46
LCD FAULTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
PROPEL DIAGNOSTIC MODE ............ 49
CURTIS 1232 CONTROLLER
DIAGNOSTICS ......................411
DIAGNOSTIC LED OPERATION. . . . . . . 411
DIAGNOSTIC CODES ................412
INPUT DISPLAY MODE .................420
MANUAL MODE .......................422
CAN CONTROLLER AREA NETWORK
DIAGNOSTIC MODE.................424
FIRMWARE UPDATE MODE.............425
BATTERY CHARGER, STANDARD. . . . . . . . 426
OPERATION.........................426
CONFIGURATION ...................426
FAULTS .............................426
BATTERY CHARGER, ONBOARD OPT. ...427
OPERATION ......................427
CONFIGURATION .................427
FAULTS ...........................427
SUBSYSTEM TROUBLESHOOTING .........428
BACKUP ALARM/LIGHT ...............428
BATTERY CHARGING...................430
ONBOARD ..........................430
OFF BOARD.........................432
PARKING BRAKE, ELECTROMAGNETIC..434
LIGHTING..............................436
Contents Page

CONTENTS
4T12 Service Information 9009917 (12-12)
MAIN SCRUB BRUSHES ................438
POWERUP ............................440
PROPEL................................442
REAR SQUEEGEE LIFT ..................444
SCRUB HEAD LIFT .....................446
SIDE BRUSH ...........................448
SIDE BRUSH LIFT.......................450
SOLUTION CONTROL, CONVENTIONAL 454
MAIN BRUSH .......................454
SIDE BRUSH ........................456
SOLUTION CONTROL, ECH2O ..........458
SPRAY NOZZLE ........................460
VACUUM FAN..........................462
SERVICE
SERVICE PROCEDURES..................... 52
REAR SQUEEGEE LIFT ACTUATOR ....... 52
REMOVAL............................ 52
INSTALLATION ....................... 53
SIDE BRUSH LIFT ACTUATOR ............ 54
REMOVAL............................ 54
INSTALLATION ....................... 54
ADUSTING SIDE BRUSH
SPRING TUBE ASSEMBLY........... 55
SIDE BRUSH MOTOR .................... 56
REMOVAL............................ 56
INSTALLATION ....................... 57
CARBON BRUSHES................... 57
MAIN BRUSH LIFT ACTUATOR........... 58
REMOVAL............................ 58
INSTALLATION ....................... 58
MAIN SCRUB HEAD ..................... 59
REMOVAL............................ 59
INSTALLATION ......................510
MAIN SCRUB BRUSH MOTOR
CYLINDRICAL .....................511
REMOVAL ........................511
INSTALLATION. . . . . . . . . . . . . . . . . . . . 512
CARBON BRUSHES ...............512
INSTRUMENT PANEL...................513
REMOVAL...........................513
INSTALLATION ......................513
LOGIC BOARD REPLACEMENT. . . . . . . . . . 514
REMOVAL...........................514
INSTALLATION ......................515
STEERING WHEEL TIMING..............516
WHEEL DRIVE ASSEMBLY ..............517
REMOVAL...........................517
INSTALLATION ......................518
TIRE REPLACEMENT.................519
Contents Page
VACUUM FAN ASSEMBLY ..............520
REMOVAL ..........................520
INSTALLATION ......................521
COMPONENT TESTING ....................522
TANK LEVEL SENSORS .................522
PARKING BRAKE, ELECTROMAGNETIC..524
PROPEL MOTOR AND ENCODER ......527
PROPEL MOTOR CABLES ...............529
THROTTLE/BRAKE SENSOR ............531
SIDE BRUSH LIFT ACTUATOR ...........533
MAIN BRUSH LIFT ACTUATOR..........534
COMPONENT TESTING CONTINUED
REAR SQGE LIFT ACTUATOR. . . . . . . . . . . . 535
VACUUM FAN..........................536
MAIN SCRUB BRUSH MOTORS .........537
SIDE BRUSH MOTOR ...................538
ECH2O PUMP .........................539
ECH2O PRESSURE SWITCH ............540
Contents Page

T12 Service Information 9009917 (12-12) 1-1
SAFETY PRECAUTIONS
IMPORTANTSAFETY INSTRUCTIONS -- SAVE THESEINSTRUCTIONS
The following precautions are used throughout
this manual as indicated in theirdescription:
WARNING: To warn of hazards or
unsafe practices that couldresult in
severe personal injury or death.
FOR SAFETY: To identify actions that must be
followed for safe operation of equipment.
The followinginformation signalspotentially
dangerous conditions to the operator. Knowwhen
these conditions can exist. Locate all safety
devices on the machine.Report machinedamage
or faulty operation immediately.
WARNING: Batteries emit hydrogen gas.
Explosion or fire canresult. Keep
sparks and open flame away. Keep
coversopen when charging.
WARNING: Flammablematerials can
cause an explosion or fire. Do not use
flammablematerials in tank(s).
WARNING: Flammablematerials or
reactive metals cancause an explosion
or fire. Do notpick up.
WARNING: ElectricalHazard
-- DisconnectBatteryCables and
Charger PlugBefore Servicing
Machine.
-- Do Not Charge Batteries with
Damaged Power Supply Cord. Do Not
Modify Plug.
If the charger supply cord is damaged or
broken, it must be replaced by the
manufacturer or its service agent or a
similarly qualified person in order to avoid a
hazard.
FOR SAFETY:
1. Do notoperate machine:
-- Unless trained and authorized.
-- Unlessoperator manual is read and
understood.
-- Under the influence of alcohol or
drugs
-- While using a cell phone or other
types of electronic devices
-- Unlessmentally and physically
capable of followingmachine
instructions.
-- With brakedisabled.
-- If it is not in proper operating
condition.
-- In areaswhere flammable
vapors/liquids or combustibledusts
are present.
-- In areas that are too dark to safely see
the controlsoroperate the machine
unlessoperating / headlights are
turned on.
-- In areaswith possible fallingobjects
unless equipped with overheadguard.
2. Before startingmachine:
-- Checkmachine for fluid leaks.
-- Keep sparks and open flame away
from refuelingarea.
-- Makesure all safety devicesare in
place and operate properly.
-- Check brakes and steering for proper
operation.
-- Adjust seat and fasten seat belt (if
equipped).
3. When usingmachine:
-- Useonly as described in thismanual.
-- Use brakes to stop machine.
-- Go slowly on inclines and slippery
surfaces.
-- Reduce speedwhen turning.
-- Keep all parts of bodyinside operator
stationwhilemachine is moving.
-- Usecarewhen reversingmachine.
-- Never allow childrentoplay on or
aroundmachine.
-- Do notcarry passengers on machine.
-- Always followsafety and traffic rules.
-- Report machine damage or faulty
operation immediately.
-- Follow mixing, handling and disposal
instructions on chemical containers.
-- Followsafety guidelines concerning
wet floors.
SAFETY PRECAUTIONS

1-2 T12 Service Information 9009917 (12-12)
SAFETY PRECAUTIONS
SAFETY PRECAUTIONS
4. Before leaving or servicingmachine:
-- Stop on level surface.
-- Turn off machine and remove key.
5. When servicingmachine:
-- All work must be donewith sufficient
lighting and visibility.
-- Avoid moving parts. Do not wearloose
clothing, jewelry and secure long hair.
-- Block machine tires before jacking
machineup.
-- Jackmachine up at designated
locationsonly. Support machinewith
jack stands.
-- Usehoist or jack that will support the
weight of the machine.
-- Do notpush or tow the machine on
inclines with the brakedisabled.
-- Do notpower spray or hose off
machine near electrical components.
-- Disconnect battery connections before
workingonmachine.
-
- Avoid contactwith batteryacid.
-- All repairs must be performed by a
trained service mechanic.
-- Do not modify the machine from its
original design.
-- Use Tennant supplied or approved
replacement parts.
-- Wear personal protective equipment
as needed and whererecommended in
thismanual.
For Safety: wear hearing protection.
For Safety: wear protective gloves.
For Safety: weareye protection.
For Safety: wear protective dust mask.
6. When loading/unloadingmachine
onto/off truck or trailer.
-- Drain tanks before loadingmachine.
-- Lower scrub head and squeegee
before tyingdownmachine.
-- Turn off machine and remove key.
-- Useramp, truck or trailer that will
support the weight of the machine and
operator.
-- Use winch. Do notpush the machine
onto/off the truck or trailer unless the
load height is 380 mm (15 in) or less
from the ground.
-- Block machine tires.
-- Tie machinedown to truck or trailer.

T12 Service Information 9009917 (12-12) 1-3
SAFETY PRECAUTIONS
SAFETY PRECAUTIONS
The safety labelsappear on the machine in the
locationsindicated.Replace damagedlabels.
WARNING LABEL -- Batteries
emit hydrogen gas. Explosion
or fire canresult. Keep sparks
and open flame away. Keep
coversopen when charging
FOR SAFETY LABEL --
Readmanual before
operatingmachine.
WARNING LABEL --
Flammablematerials
or reactive metals can
cause explosion or
fire. Do notpick up.
Located on
electrical panel.
Located on
electrical panel.
Located inside
battery compartment.
WARNING LABEL -- Flammable
materials cancause explosion
or fire. Do not use flammable
materials in tank
Located on recovery tank,
above solution tank cap.
FOR SAFETY LABEL --
Authorized Service
MechanicOnly.
Located on circuitboard
cover and electrical panel.

1-4 T12 Service Information 9009917 (12-12)
SAFETY PRECAUTIONS

GENERAL INFORMATION ..................... 21
COMPONENT LOCATOR.................... 22
ELECTRICAL SCHEMATIC, MASTER ......... 24
ELECTRICAL SCHEMATIC SYMBOLS ..... 29
OPERATIONAL MATRIX....................210
SPECIFICATIONS ..........................212
FASTENER TORQUE ....................212
MACHINE DIMENSIONS................213
GENERAL MACHINE DIMENSIONS/
CAPACITIES .........................214
GENERAL MACHINE PERFORMANCE ...214
POWER TYPE ..........................215
TIRES ..................................215
ECH2O SYSTEM OPTION .............215
ELECTRICAL COMPONENTS............216
GENERAL INFORMATION
SECTION 2
Contents Page
2-1
T12 Service Information 9009917 (12-12)

2-2 T12 Service Information 9009917 (12-12)
GENERAL INFORMATION
COMPONENT LOCATOR
A
B
C
DE F
G
H
I
J
K
LM
N
O
P
QP1
R
Components
Aec-H2O System Components*
BIRIS™ Inline 2 Amp Fuse Holder*
Cec-H2O, Side Brush, and Spray
Nozzle Pumps*
DBatteries
ESV-3 Side Brush Water Valve*
FWheel Drive Assembly (Motor,
Encoder, Temp Sender
GSeat Switch
HCircuit Breakers (1-8)
IWarning Light/ Backup Alarm*
JSolution Tank
KVacuum Fan Housing
LRear Squeegee Lift Actuator
Level Switch, Solution Tank
MSV-2 Main Water Valve
NSide Brush Motor*
OThrottle/Brake Sensor
PCircuit Breakers (9-16)
P1Module, Side Scrub
QModule, Curtis 1232
RRecovery Tank
* Optional Equipment

T12 Service Information 9009917 (12-12) 2-3
GENERAL INFORMATION
COMPONENT LOCATOR, continued
S
T
U
Y
Z
X
W
V
Components
SModule, Main Scrub
TModule, Interface
UModule, IRIS™ Telemetry
VMain Scrub Head Lift Actuator
WModule, Water Pickup
Diodes 1, 2, and 3
XOnboard Battery Charger
YM2 Relay, Circuit Breaker 17
(Inside Warning Light/BU Alarm)
ZLevel Switch, Recovery Tank
* Optional Equipment

2-4 T12 Service Information 9009917 (12-12)
GENERAL INFORMATION
36VDC BATTERIES
TO: BATTERY B+ AT M1.
ISOLATED GROUND
POST = STAND OFF
SEAT SWITCH HARNESS
TO: OPTIONAL BACK UP LIGHT
AC PROPEL MOTOR
(INCLUDES ENCODER,
TEMP SENDER AND BRAKE SOL.)
SV-1
NOT USED
YEL
W
U
V
B2: BRN
T2: YEL
T1: YEL
B1: PUR
A+
W1
A-
AC PROPEL MOTOR PIN OUT (FACING MOTOR)
YEL
AMER ENCODER
PROPEL MOTOR CONTROL
HARNESS
B1 B2
ORAGRN
WHT
E-STOP SWITCH CHARGER INTERLOCK
TO: GROUND POST
AC PLUG
B+ TO M1/GND
CABLE, M1 TO FUSE-1
2/BRN
KEY SWITCH
SWITCHED B+ (@ CURTIS B+)
CHARGER HARNESS
FUSED B+
SHUNT HIGHSHUNT LOW
TO: SHUNT HIGH
SHUNT LOW
IN-LINE (OPTIONAL)
OPTIONAL TELEMETRYCABLES:
OPTIONAL TELEMETRY CABLES:
STATIC GROUND LINES (IN THE MAIN HARNESS)
BLK
71/PNK
YEL
17/PUR
BLU
70/TAN 69/WHT 58/GRY
RED
16/BLU 14/YEL 58/GRY
58/GRY
8/GRY
POWER/GND TO CURTIS.
YRG/8YRG/8
8/GRY
18/GRY 11/PNK
9/WHT
15/GRN
W/WHT U/ORA V/GRN
12/BRN
62/BRN
61/PNK
58/GRY
17/PUR
59/WHT
66/BLU
17/PUR
5/GRN
3/ORA
2/BRN
4/YEL
1/RED
7/PUR6/BLU
10/TAN
1/RED
13/BLK
2/BRN
8/GRY
13/BLK
CABLE: POWER/GND TO CURTIS.
22/BRN
YRG/8YRG/8
1/RED
CAN+ /YEL
79/WHT
77/PUR
94/YEL
POWER/GND TO CURTIS.
CABLE: B+ TO M1/GND.
13/BLK-WHT79/WHT
13/BLK-WHT13/BLK-WHT
CAN- /GRN
105/GRNTO: SCRUB MODULE MOUNTING PLATE
TO: EC-H20/FAST MOUNTING PLATE TO: SIDE BR. MODULE MOUNTING PLATE
58
58
17
15
22
13
79
77
94
79
13
M1B
MAIN CONTACTOR
CURTIS 1232 CONTROLLER
KSI
J1-1
DRV2
J1-5
DRV1
J1-6
INTERLOCK
J1-9
I/O GND
J1-7
36VDC
J1-13
BRAKE IN
J1-24
THROTTLE
J1-16
CAN TERM H
J1-21
FWD
J1-22
CAN+
J1-23
+5V
J1-26
PHASE A
J1-31
PHASE B
J1-32
REV
J1-33
CAN TERM L
J1-34
CAN-
J1-35
U
U
V
V
W
W
B+
B+
GND
GND
THERMISTOR
J1-8
DRV3
J1-4
DRV4
J1-3
PROG+
J1-25
TX
J1-28
RX
J1-29
4
4
5
3
CB2
2.5A-REAR
CONN7A
A
6 VDC
+ --
PROGRAMMING PORT
GND
2
B+
4
RX
1
TX
3
CB-8
2.5A-TELEMETRY
D-1
1
6 VDC
+ --
4
6 VDC
+ --
CB3
2.5A-REAR
CHG-1
OPT: ON BOARD CHARGER
P1-C
2
GND
P1-B
B+
P1-A
P1-D
1
8
5
6
6
SHUNT-1
TELEMETRY SHUNT
D-2
AC PROPEL MOTOR
MTR
53
2
M1A
MAIN CONTACTOR
+
-
B
THROTTLE SENSOR
BRAKE
P1-C
THROTTLE
P1-B
B+
P1-A
GND
P1-D
7
A
6
6 VDC
+ --
FUSE-1
80A-REAR
1
4
2
3
ON
OFF
FWD/REV SW.
8
6
4 1 5
2
PARK BRAKE
2
1
1
3
6 VDC
+ --
BLU
BLK
WHT
RED
8
2
6 VDC
+ --
D-3
B
6
2
5
6
STIGN
BATT
START ACC
X
XX
X
75 15 5030
SENDER, TEMP
T2
T1
7
SEAT SWITCH
P1-6
P1-7
A
B
C
D
ELECTRICAL SCHEMATIC (1 of 6)

T12 Service Information 9009917 (12-12) 2-5
GENERAL INFORMATION
ELECTRICAL SCHEMATIC (2 of 6)
18 AMPS
ROTAUTCAND/PUEGQS
10-25 AMPS
CYL=USE ADAPTOR AT FRONT BRUSH MOTOR
10-25 AMPS
KEY SWITCH
SV-2
TO: FUSED B+
TO: SHUNT HIGH
SHUNT LOW
STATIC GROUND LINES (IN THE MAIN HARNESS)
OPEN SWITCH = EMPTY
OPT. TELEMETRY HARNESS
BLK
YEL
RED
14/YEL
58/GRY 8/GRY
5/GRN
4/YEL
7/PUR6/BLU
2/BRN
31/PNK
8/GRY
56/BLU 23/ORA 28/GRY
32/BRN
25/GRN 24/YEL 26/BLU 27/PUR
THW-KLB/57THW-KLB/57
ARO/37ARO/37
13/BLK
CABLE: POWER/GND TO CURTIS.
13/BLK
20/TAN34/YEL 21/PNK34/YEL 19/WHT34/YEL 34/YEL34/YEL 33/ORA33/ORA2/BRN
2/BRN
13/BLK
YRG/8YRG/8
CAN+ /YEL
13/BLK36/BLU
CAN+ /YEL
79/WHT
CAN- /GRN
13/BLK 13/BLK 13/BLK
13/BLK
13/BLK-WHT13/BLK-WHT
77/PUR 77/PUR
CAN- /GRN
30/TAN 29/WHT
105/GRNTO: SCRUB MODULE MOUNTING PLATE
TO: EC-H20/FAST MOUNTING PLATE
TO: SIDE BR. MODULE MOUNTING PLATE
58
13
79 77
1
CB-4
2.5A-REAR
MAIN NO DRIP VALVE
ALARM-1
VARIABLE VOLUMN AUDIBLE ALARM
P1-1P2-1
B+
J1-1
GND
J1-4
SQGE_ACT1
J2-2
SQGE_ACT2
J2-3
VAC1-
J1-2
VAC1+
J1-3
NOT_USED
J4-4
SHIELD
J4-3
CAN-
J4-2
CAN+
J4-1
OPEN2
J2-10
MTR
VAC FAN #1
2 1
RIGHT/REAR BRUSH MOTOR
21
1
SOL. TANK EMPTY
A B
M1A
MAIN CONTACTOR
+
-
2
EXTEND LIMIT SW.
RETRACT LIMIT
BLK
RED
BLK
RED
MTR
1 2
THROTTLE
P1-B
B+
P1-A
GND
P1-D
MTR
SCRUB UP/DOWN
21
MTR MTR
LEFT/FRONT BRUSH MOTOR
2 1
CB-5
60A-REAR
SCRUB MODULE
B+ POST
P1-1
GND. POST
P2-1
SCRUB_ACT1
J6-7
SCRUB_ACT2
J6-8
LEFT_BRUSH-
J5-1
LEFT_BRUSH+
J5-2
OPEN3
J5-3
RT_BRUSH-
J5-4
FLYBACK
J6-1
MAIN H20 DRIP
J6-2
OPEN5
J6-10
OPEN6
J6-11
OPEN7
J6-12
LOW SOL.
J6-13
HORN
J6-3
AUD. ALARM
J6-4
OPEN1
J6-5
OPEN2
J6-6
OPEN4
J6-9
DIGITAL_GND
J6-15
CAN_SHIELD
J6-14
NOT_USED
J3-4
SHIELD
J3-3
CAN-
J3-2
RT_BRUSH+
J5-5
CAN+
J3-1
+12VDC
J6-16
HORN-1
HORN
P1-1P2-1
2
1
D-3
CB-5
25A-REAR
STIGN
BATT
START ACC
X
XX
X
75 15 5030
TELEMETRY MODULE
B+
P1-22
B+
P1-23
GND
P1-21
SHUNT+
P1-6
SHUNT-
P1-7
CAN+
P1-3
CAN-
P1-11
GND
P1-20
GND
P1-19
2
A
B
C
E
H
I
J
F
G
D

2-6 T12 Service Information 9009917 (12-12)
GENERAL INFORMATION
ELECTRICAL SCHEMATIC (3 of 6)
SWITCHED B+
GROUND
18 AMPS
ROTAUTCAND/PUEGQS
10-25 AMPS
CYL=USE ADAPTOR AT FRONT BRUSH MOTOR
10-25 AMPS
CAN BUS SEE
SECTION E15
OPEN SWITCH = EMPTY
CLOSED SWITCH = FULL
2/BRN
31/PNK
2/BRN
56/BLU 23/ORA 28/GRY 32/BRN
13/BLK
25/GRN 24/YEL 26/BLU 27/PUR
CAN+ /YEL
THW-KLB/57THW-KLB/57
ARO/37ARO/37
13/BLK
CAN+ /YEL
13/BLK36/BLU 13/BLK35/GRN
CAN- /GRN CAN- /GRN
30/TAN 29/WHT
2
13
CAN-
CAN+
2.5A-REAR
H2O PICK-UP MOD.
B+
J1-1
GND
J1-4
SQGE_ACT1
J2-2
SQGE_ACT2
J2-3
VAC1-
J1-2
VAC1+
J1-3
SOL. FULL
J2-6
NOT_USED
J4-4
SHIELD
J4-3
CAN-
J4-2
CAN+
J4-1
EXTRA_OUT1
J2-5
EXTRA_OUT2
J2-4
FLYBACK
J2-1
OPEN2
J2-10
OPEN1
J2-9
EXTRA_IN2
J2-8
EXTRA_IN1
J2-7
MTR
VAC FAN #1
2 1
RIGHT/REAR BRUSH MOTOR
21
SOL. TANK EMPTY
A B
EXTEND LIMIT SW.
RETRACT LIMIT
BLK
RED
BLK
RED
MTR
1 2
REC. TANK FULL
A B
MTR
SCRUB UP/DOWN
21
MTR MTR
LEFT/FRONT BRUSH MOTOR
2 1
SCRUB MODULE
SCRUB_ACT1
J6-7
SCRUB_ACT2
J6-8
LEFT_BRUSH-
J5-1
LEFT_BRUSH+
J5-2
OPEN3
J5-3
RT_BRUSH-
J5-4
OPEN5
J6-10
OPEN6
J6-11
OPEN7
J6-12
LOW SOL.
J6-13
OPEN1
J6-5
OPEN2
J6-6
OPEN4
J6-9
DIGITAL_GND
J6-15
CAN_SHIELD
J6-14
RT_BRUSH+
J5-5
CB-1
25A-REAR
INTERFACE PANEL
DIGITAL_GND
J1-3
+12VDC
J1-4
CAN-
J1-2
CAN+
J1-1
E
H
I
J
F
G

T12 Service Information 9009917 (12-12) 2-7
GENERAL INFORMATION
ELECTRICAL SCHEMATIC (4 of 6)
ELUDOM02H-CE
SWITCHED B+
(@ CURTIS B+)
GROUND
(ECHO sparger)
(ECHO cell)
EC-H20 FLUSH SW.
OPT. EC-H2O HARNESS
SIDE BRUSH MODULE
(A) (B)
OPT. EC-H2O MODULE HARNESS
SWITCHED B+ (@ CURTIS B+)
SWITCHED B+ (@ M1 CONTACTOR)
OPT. SIDE BRUSH HARNESS
ECHO/FAST PUMP
CLOSED SWITCH = ENABLE SIDE BR.
MAIN HARNESS
13 AMPS
SIDE BRUSH UP/DN ACTUATOR
OPT. SIDE BRUSH HARNESS
60/TAN
8EA/GRY 7EA/PUR 3EA/ORA 4EA/YEL
37/PUR22/BRN
2/BRN
2/BRN
46/BLU
13EA/BLK 9EA/WHT
46/BLU 13/BLK
45/GRN
CAN+/YEL
52/BRN 52/BRN50/TAN
50/TAN 50/TAN 50/TAN
51/PNK46/BLU
CAN+/YEL
CAN-/GRN CAN-/GRN
40/TAN 39/WHT
38/GRY 38/GRY
38/GRY
22/BRN
43/ORA 53/ORA 42/BRN 44/YEL
22
13
CAN+
CAN-
22
2
32
2
CB-7
2.5A-REAR
PRESS NC, OPENS @ 25PSI +/-2PSI = FAULT
COM NC
NO
3
CB-9
20A-FRONT
+ -
C-1
CAPACITOR, 0.01UF, 200V
5
CB-10
2.5A-FRONT
1
EC-H20 MODULE
VCC_1
J4-1
GND_1
J4-14
FLYBACK
J4-3
SIDE BR. VALVE
J4-5
NOT USED #1
J4-6
VCC_2
J4-2
GND_2
J5-13
SPGR_A
J5-1
SPGR_B
J5-2
CELL_A
J5-3
CELL_B
J5-4
FLUSH_GND
J5-6
FLUSH_SW
J5-5
PRESS_IN
J4-9
CAN+
J4-10
CAN-
J4-11
GND_3
J5-12
PUMP
J4-4
NOT USED #2
J4-7
OPEN1
J4-8
1
2
16
1
4
MTR
SIDE BRUSH MOTOR
2 1
SIDE BRUSH MOD.
B+
J1-1
GND
J3-4
SIDE_ACT1
J5-2
SIDE_ACT2
J5-3
SIDE MTR-
J3-2
SIDE MTR+
J3-3
ENABLE
J5-6
NOT_USED
J2-4
SHIELD
J2-3
CAN-
J2-2
CAN+
J2-1
SIDE PUMP
J5-5
SIDE VALVE
J5-4
FLYBACK
J5-1
OPEN2
J5-10
OPEN1
J5-9
EXTRA_IN1
J5-8
SIDE SEL.
J5-7
SIDE H20 PUMP
MTR
3
3
1
1
SIDE BR. NO DRIP WATER
MTR
ON
OFF
SIDE BRUSH SW.
8
6
4 1 5
2
5
1
4
6
EXTEND LIMIT SW.
RETRACT LIMIT
BLK
RED
BLK
RED
MTR
1 2
ECH20 SIDE BR. VALVE
CB-6
2.5A-REAR
2
4
4
2
K

2-8 T12 Service Information 9009917 (12-12)
GENERAL INFORMATION
ELECTRICAL SCHEMATIC (5 of 6)
STHGILDNAWYARPS
ELUDO
BACK UP
ALARM/LIGHT
OPT. LIGHT KIT
STROBE LT. FLASHINGLT.
NOT USED
(FOR CUSTOM OPT.)
STROBE LT. FLASHINGLT.
LIGHTS OFF/DN = 2-1, 6-5
WARN. LIGHT ON/CENTER = 2-3, 6-7 HEAD & WARN ON/UP = 3-4, 7-8
OPT. LIGHT / ALARM HARNESS
OPT. OHG WARNING LIGHT HARNESS
LOCATED INSIDE LIGHT ASSEMBLY
+36VDC FROM CONTROLLER
(ECHO sparger)
(ECHO cell)
EC-H20 FLUSH SW.
OPT. EC-H2O HARNESS
OPT. EC-H2O MODULE HARNESS
SWITCHED B+ (@ CURTIS B+)
67/PUR 67/PUR
65/GRN 65/GRN 13/BLK
65/GRN
13/BLK
85/GRN-WHT
85/GRN-WHT
90/TAN 15/GRN
13/BLK
93/ORA68/GRY 13/BLK
92/BRN
90/TAN 90/TAN
92/BRN 76/BLU 13/BLK
13/BLK
17/PUR17/PUR
22/BRN
8EA/GRY 7EA/PUR 3EA/ORA 4EA/YEL
63/ORA
13/BLK13/BLK13/BLK64/YEL
64/YEL64/YEL
13/BLK13/BLK
13EA/BLK 9EA/WHT
22/BRN
15/GRN
50/TAN 50/TAN
22/BRN
76/BLU 76/BLU
13/BLK
94/YEL
15
17
22
94
1
OHG FLASH/STROBE LIGHT
3
5
CB-16
NOT USED-FRONT
RIGHT HEADLIGHT (LED)
+ -
C-1
CAPACITOR, 0.01UF, 200V
2
5
4
M2A
OPT. REVERSE RELAY
8586
2
EC-H20 MODULE
FLYBACK
J4-3
SPGR_A
J5-1
SPGR_B
J5-2
CELL_A
J5-3
CELL_B
J5-4
FLUSH_GND
J5-6
FLUSH_SW
J5-5
OPEN1
J4-8
WHT, BACK UP LIGHT (LED)
LIGHT SWITCH
12
4
3 56 78
RED TAILLIGHT (LED)
CB-14
2.5A-FRONT
6
ALARM-2
REVERSE ALARM
P1-1P2-1
3
CB-13
2.5A-FRONT
CB-15
2.5A-FRONT
1
S-11
SPRAY NOZZLE SWITCH
1
24
5
68
910
1
5
CB11
15A-FRONT
21
2
LT-2
5
SPRAY NOZZLE PUMP
MTR
FLASH/STROBE LIGHT
LT-3
4
LEFT HEADLIGHT (LED)
M2B
30
87
CB-12
15A-FRONT
D-4
6
CB-17
2.5A
K

T12 Service Information 9009917 (12-12) 2-9
GENERAL INFORMATION
ELECTRICAL SCHEMATIC SYMBOLS
1
2
2
1
+ -
+ -
Switched B+
From Buss Bar
Switched B+
B- From
Stando
B- From
Stando
S-5 Seat Switch (N.O.)
Amer
Encoder
Cable
C1 Capacitor (0.01Uf)
R1
(11 Ω/40W)
+ -
MTR
ecH2O
Pump
J3-2 Brush RT-
J3-5 Brush LT+
J3-6 Brush LT-
Right/Rear Brush
Left/Front* Brush
* Cylindrical = Uses Adaptor
ecH2O
Control
Module
T16
Control
Board
VCC_A
Alarm
Com N.C.
N.O.
S-14 Pressure Sw.
N.C. Opens @ 25 +/- 2 psi
Enable
GND_A
GND_B
Pressure IN
(ECH2O SW)
(ECH2O SW)
VCC_B
VCC_C
Pump
(SOL-A)
ecH2O Valve
Sparger
e-Cell
65EA/BLU
5EA/GRN
8EA/GRY
7EA/PUR
3EA/ORA
4EA/YEL
(SOL-B)
(SPA-A)
(SPA-B)
(CELL-A)
(CELL-B)
(LED GND)
(LED RED)
(LED GRN)
Squeegee
Actuator
Battery Positive +
Battery Negative -
D-8
FU2
100A
70/TAN
M4A
86 85
B+
J7-1 B+ Control
B-
Cable
8/GRY
FU1
100A
FU1
100A
102/BRN
Sweep OFF/Down = 2-1, 6-5
Sweep ON/Center = 2-3, 6-7
Vac & Sweep ON/Up = 3-4, 7-8
Cable
Pre-Sweep
Brush Relay
CB3 (2.5A)
CB19 (25A)
CB16 (15A)
J7-4 Sweep
Note:
ecH2O Enable:
J7-10 Low=Turn ON ecH2O
Note:
Pre-Sweep Enable:
J6-10 B+ = Sweep Enable ON
Sweep Enable J6-10
37/PUR
38/GRY
CB9 (2.5A) 79/WHT
CB10 (2.5A)
Note:
ecH2O Side Brush
J7-12 Low=SV3 H20 Valve ON
ecH2O Pump ON 100%
13/BLK
88/GRY
9EA/WHT
S-15
Flush Switch
13EA/BLK
21/PNK
Extend
Limit Sw.
22/BRN
MTR 26/BLU
25/GRN
2/BRN
Switched B+
From Buss Bar
Switched B+
From Buss Bar
Switched B+
To: CAN Open-
(J6-14)
To: Throttle
Sensor (GND)
To: Curtis 1234
(I/O GND)
To: CAN Open+
(J6-13)
To: Back-Up
Light Circuit
To: Back-Up
Alarm Circuit
80/TAN
PMC001
12
12
MTR
10 4
1
3
2
7
9
6-4
6-8
5
6
11
12
8
6-1
6-2
6-3
6-6
6-5
6-7
ON
OFF
6
2
8
5
4
1
FWD
REV
6
2
8
BA
5
4 J1-33
GND Cable
J1-34
J1-21
W/WHT
V/GRN
U/ORN
J1-3
J1-4
J1-13
J1-11
BLU2 J1-32
J1-26
J1-31
J1-7
J1-18 J1-15
66/BLU 61/PNK
62/BRN 12/BRN
17/PUR
Propel Motor Assembly
17/PUR
15/GRN
87/PUR
Temp Sender
Brake Solenoid
59/WHT
58GRY
RED1 WHT5 BLK6
YEL
T2
B1 B2
T1
YEL
J1-16 J1-35 J1-23
P1-C
BLU
YEL
P1-B
P1-D
BLK
P1-A
RED
J1-22
J1-9
J1-1
B+
J1-29
J1-28
J1-25
1
1
3
5
7
2
4
6
8
Pre-Sweep Switch
Sweep OFF/Down = 2-1, 6-5
Sweep ON/Center = 2-3, 6-7
Vac & Sweep ON/Up = 3-4, 7-8
1
3
5
7
2
4
6
8
M3B
MTR
MTR
MTR
MTR
FaST/ES Pump
D-9
D-6
D-7
D-12
67/PUR
64/YEL 81/PNK
Pre-Sweep
Vacuum Fan
LH Side Broom Motor
Main Broom Motor
13/BLK
13/BLK
65/GRN
65/GRN
65/GRN
68/GRY
69/WHT
D-11
30 87
M3A
Curtis 1234
Controller
PROG +
TX
RX
B+
KSI
INTERLOCK
FWD
FWD/REV Switch
Throttle Sensor
REV
B -
GND
B+
THROTTLE
BRAKE
CAN TERM L
CAN TERM H
U
DRV3
DRV4
DRV1 THERMISTOR I/O GND PHASE A PHASE B +5V DRV2
COIL RETURN
V
W
BRAKE IN
(0-5 vdc)
(0-5 vdc) THROTTLE
CAN L
8/GRY 8/GRY
18/GRY
16/BLU
94/YEL
9/WHT
11/PNK
14/YEL
58/GRY
58/GRY
CAN H
6 Volt
IGN
15
ACC
30
BAT T
75
50 Start
ST
To: Back-Up
Alarm Circuit
+ -
Com N.C.
N.O.
1
3
5
7
2
4
6
8
MTR MTR
M3B
30 87
M3B
30 87a
M3A
IGN ST
+ -
Note: Key Switch ON
Key Switch
Battery
DPDT Switch
Pressure Switch
Motor
3 Phase AC
Induction Motor
Motor Encoder
Momenary Switch N.O.
Contact Switch N.C.
Solenoid Valve
Sensor
(Variable Resistor)
Circuit Breaker
Fuse
Diode
Single Continuation Tab
Double Continuation Tab
Relay Coil
N.C. Relay Contacts
N.O. Relay Contacts
Horn or Alarm
Light
Connected
Not Connected
Connector
Energized
Adaptor Harness
Notes
Assembly
AC Plug
Capacitor
Electro-
Magnetic
Brake
Enabled (Applied)
• Key O
• Neutral - Ready State
• Brake Command
• Seat Switch Open
• Curtis 1234 Fault
(See Troubleshooting)
• Throttle Command
• Seat Switch Closed
Disabled (Released)
Operational Matrix:
Propel
Enabled
•Seat Switch Closed
• Foot Throttle
Command
• Fwd/Rev Switch Input
• Seat Switch Open
• Neutral-Ready State
• Brake Command
• Curtis 1234 Fault
Disabled
Operational Matrix:
* SV2 Water Valve Voltage
Range
Low 1-LED
2-LEDs
3-LEDs
1-LED
2-LEDs
3-LEDs
1-LED
2-LEDs
3-LEDs
20%
30%
45%
30%
55%
80%
55%
80%
100%
7.2 Volts
10.8 Volts
16.2 Volts
10.8 Volts
19.8 Volts
28.8 Volts
19.8 Volts
28.8 Volts
36 Volts
Med
(Default)
High
Level PWM% @ Nominal
36 VDC

2-10 T12 Service Information 9009917 (12-12)
GENERAL INFORMATION
FUNCTION ENABLED
T12 OPERATIONAL MATRIX
DISABLED
Vacuum Fan, Scrubbing • 1-STEP Scrub ON
• Squeegee/Vacuum ON
• 1-STEP Scrub OFF
• Squeegee/Vacuum OFF
• Recovery Tank Full
• Very Low Battery Voltage
• Load Current Fault
Rear Squeegee Down • 1-STEP Scrub ON
• Squeegee/Vacuum ON
• 1-STEP Scrub OFF
• Squeegee/Vacuum OFF
• Reverse Propel
• Recovery Tank Full
• Very Low Battery Voltage
• Load Current Fault
Rear Squeegee Up • 1-STEP Scrub ON
• Squeegee/Vacuum ON
• 1-STEP Scrub OFF
• Squeegee/Vacuum OFF
• Reverse Propel
• Recovery Tank Full
• Very Low Battery Voltage
• Load Current Fault
Main Scrub Brushes • 1-STEP Scrub ON
• Fwd/Rev Throttle Command
• 1-STEP Scrub OFF
• Neutral - Ready State
• Recovery Tank Full
• Solution Tank Empty
• Very Low Battery Voltage
• Load Current Fault
Scrub Head Down • 1-STEP Scrub ON
• Fwd/Rev Throttle Command
• 1-STEP Scrub OFF
• Neutral - Ready State
• Recovery Tank Full
• Solution Tank Empty
• Very Low Battery Voltage
• Load Current Fault
Scrub Head Up • 1-STEP Scrub ON
• Fwd/Rev Throttle Command
• 1-STEP Scrub OFF
• Neutral - Ready State
• Recovery Tank Full
• Solution Tank Empty
• Very Low Battery Voltage
• Load Current Fault
Side Brush Extend/Down • 1-STEP Scrub ON
• Side Brush Switch ON
• 1-STEP Scrub OFF
• Side Brush Switch OFF
• Recovery Tank Full
• Solution Tank Empty
• Very Low Battery Voltage
• Load Current Fault
MOM001

T12 Service Information 9009917 (12-12) 2-11
GENERAL INFORMATION
Back-Up Alarm/Lights • Reverse Switch Input
• Reverse Throttle Command
• Forward Switch Input
• Neutral - Ready State
• Curtis 1232 Fault
Electromagnetic Parking
Brake
• Key OFF
• Emergency Stop Switch Open (Down)
• Neutral (1-2 Second Delay)
• Seat Switch Open
• Curtis 1232 Fault
• Key ON
• Emergency Stop Switch Closed (Up)
• Fwd/Rev Throttle Command
• Seat Switch Closed
Propel • Seat Switch Closed
• Fwd/Rev Throttle Command
• Fwd/Rev Switch Input
• Seat Switch Open
• Neutral - Ready State
• Brake Command
• Curtis 1232 Fault
FUNCTION ENABLED
T12 OPERATIONAL MATRIX, continued
DISABLED
Solution Control
(ecH2O)
• 1-STEP Scrub ON
• Solution Control ON
• ecH2O Button ON
• Fwd/Rev Throttle Command
• 1-STEP Scrub OFF
• Solution Control OFF
• ecH2O Button OFF
• Neutral - Ready State
• Recovery Tank Full
• Solution Tank Empty
• Very Low Battery Voltage
• ecH2O System Fault
• Load Current Fault
MOM002
Solution Control
(Conventional)
• 1-STEP Scrub ON
• Solution Control ON
• Fwd/Rev Throttle Command
• 1-STEP Scrub OFF
• Solution Control OFF
• Neutral - Ready State
• Recovery Tank Full
• Solution Tank Empty
• Very Low Battery Voltage
• Load Current Fault
Side Brush Retract/Up • 1-STEP Scrub ON
• Side Brush Switch ON
• 1-STEP Scrub OFF
• Side Brush Switch OFF
• Recovery Tank Full
• Solution Tank Empty
• Very Low Battery Voltage
• Load Current Fault
Side Brush • 1-STEP Scrub ON
• Side Brush Switch ON
• Fwd/Rev Throttle Command
• 1-STEP Scrub OFF
• Side Brush Switch OFF
• Neutral - Ready State
• Recovery Tank Full
• Solution Tank Empty
• Very Low Battery Voltage
• Load Current Fault

2-12 T12 Service Information 9009917 (12-12)
GENERAL INFORMATION
FASTENER TORQUE
Thread
Size
SAE
Grade 1
SAE
Grade 2
Carriage
Bolts
Thread
Cutting
Thread
Rolling
SAE
Grade 5
Socket &
Stainless
Steel
SAE
Grade 8
Headless
Socket Set
Screws
Square
Head Set
Screws
4 (.112) (5) - (6.5) (4) - (6)
Inch Pounds
5 (.125) (6) - (8) (9) - (11)
6 (.138) (7) - (9) (20) - (24) (9) - (11)
8 (.164) (12) - (16) (40) - (47) (17) - (23)
10 (.190) (20) - (26) (50) - (60) (31) - (41)
1/4 (.250) 4 - 5 5 - 6 7 - 10 7 - 10 10 - 13 6 - 8 17 - 19
Foot Pounds
5/16 (.312) 7 - 9 9 - 12 15 - 20 15 - 20 20 - 26 13 - 15 32 - 38
3/8 (.375) 13 - 17 16 - 21 27 - 35 36 - 47 22 - 26 65 - 75
7/16 (.438) 20 - 26 26 - 34 43 - 56 53 - 76 33 - 39 106 - 124
1/2 (.500) 27 - 35 39 - 51 65 - 85 89 - 116 48 - 56 162 - 188
5/8 (.625) 80 - 104 130 - 170 171 - 265 228 - 383
3/4 (.750) 129 - 168 215 - 280 313 - 407 592 - 688
1 (1.000) 258 - 335 500 - 650 757 - 984 1281 - 1489
Thread
Size
4.8/5.6 8.8
Stainless Steel
10.9 12.9 Set
Screws
M3 43 - 56 Ncm 99 - 128 Ncm 139 - 180 Ncm 166 - 215 Ncm 61 - 79 Ncm
M4 99 - 128 Ncm 223 - 290 Ncm 316 - 410 Ncm 381 - 495 Ncm 219 - 285 Ncm
M5 193 - 250 Ncm 443 - 575 Ncm 624 - 810 Ncm 747 - 970 Ncm 427 - 554 Ncm
M6 3.3 - 4.3 Nm 7.6 - 9.9 Nm 10.8 - 14 Nm 12.7 - 16.5 Nm 7.5 - 9.8 Nm
M8 8.1 - 10.5 Nm 18.5 - 24 Nm 26.2 - 34 Nm 31 - 40 Nm 18.3 - 23.7 Nm
M10 16 - 21 Nm 37 - 48 Nm 52 - 67 Nm 63 - 81 Nm
M12 28 - 36 Nm 64 - 83 Nm 90 - 117 Nm 108 - 140 Nm
M14 45 - 58 Nm 102 - 132 Nm 142 - 185 Nm 169 - 220 Nm
M16 68 - 88 Nm 154 - 200 Nm 219 - 285 Nm 262 - 340 Nm
M20 132 - 171 Nm 300 - 390 Nm 424 - 550 Nm 508 - 660 Nm
M22 177 - 230 Nm 409 - 530 Nm 574 - 745 Nm 686 - 890 Nm
M24 227 - 295 Nm 520 - 675 Nm 732 - 950 Nm 879 - 1140 Nm
METRIC
SAE (STANDARD)