Tennant T581 Operating manual

PLDC04454
REVISION DATE
December 23, 2020
DATE
December 23, 2020
TECHNICAL OFFICE
Stavale
T581
TECHNICAL SERVICE MANUAL

PLDC04454
REVISION 00
December 23, 2020
TECHNICAL OFFICE
Stavale
Contents
A1.1 Checking brush motor current draw..............................................................................7
A1.2 Checking brush motor thermal protector operation.......................................................10
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A2.1 Dismantling the head on the double-brush version ......................................................13
A2.2 Dismantling and replacing the brush motors.................................................................18
A2.3 Checking and replacing the brush motor carbon brushes ............................................20
A2.4 Dismantling the brush motor thermal protector.............................................................23
A3.1 Checking head actuator current draw...........................................................................26
A3.2 Checking head actuator electrical operation.................................................................27
A3.3 Replacing the head actuator.........................................................................................28
B1.1 Checking suction motor current draw............................................................................33
B1.2 Checking and replacing the suction motor carbon brushes..........................................35
B1.3 Disassembling and replacing the suction motor............................................................36
B1.4 Replacing the suction motor carbon brushes on the bench..........................................37
B1.5 Replacing the carbon brushes on two-stage suction motors ........................................38
B2.1 Checking squeegee actuator current draw ...................................................................40
B2.2 Replacing the squeegee actuator .................................................................................41
B2.2 Adjusting the squeegee.................................................................................................42
B3.1 Checking solenoid valve operation ...............................................................................44
B3.2 Inspecting and replacing the solenoid valve .................................................................45
B3.3 Replacing the complete solenoid valve.........................................................................46
%&OHDQLQJWKH¿OWHUV ........................................................................................................47
B4.1 Checking operation of the dirty water tank sensor........................................................50
B4.2 Checking operation of the solution tank sensor............................................................51
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C1.1 Curtis drive board connections .....................................................................................57
C1.2 Italsea drive board connections....................................................................................58
C1.3 Dismantling the Curtis drive board................................................................................59
C2.1 Checking drive motor current draw...............................................................................61
C2.2 Checking and replacing the drive motor electric brake.................................................62
C2.3 Checking and replacing the drive wheel carbon brushes ............................................64
C2.4 Checking and replacing the drive motor thermal protector...........................................66
C2.5 Replacing the drive motor rubber ring...........................................................................67
C2.6 Replacing the drive motor.............................................................................................69
C3.1 Dismantling and/or replacing the accelerator pedal......................................................71
C3.2 Checking the pedal potentiometer and microswitch. ....................................................72
C3.3 Replacing the pedal potentiometer and microswitch. ...................................................74
C3.4 Adjusting the pedal potentiometer and microswitch......................................................75
D1.1 Programming the board - Technical menu....................................................................79
D1.2 Dismantling the instrument panel board .......................................................................80
'8SGDWLQJWKHLQVWUXPHQWSDQHOERDUG¿UPZDUH.............................................................81
D2.1 Functions board connections........................................................................................83
D2.2 Dismantling the functions board....................................................................................84
D3.1 Electrical wiring diagrams single disc version...............................................................85
D3.2 Electrical wiring diagrams double disc version .............................................................86
E1.1 Instrument panel board display alarms ........................................................................88
E1.2 Drive board display alarms............................................................................................89
E2.1 Troubleshooting.............................................................................................................90

PLDC04454
REVISION 00
December 23, 2020
TECHNICAL OFFICE
Stavale
REVISIONS - UPDATES SERVICE MANUAL.......................................................................92

PLDC04454
REVISION 00
December 23, 2020
TECHNICAL OFFICE
Stavale
December 23, 2020 5 of 92
*WARNING!
Move the machine to the tank draining area and empty the
solution and dirty water tanks using the hoses provided.
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If necessary, place chocks under the wheels.
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anticlockwise and/or pressing the emergency switch.
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of the Anderson connector with handle.
i INFORMATION
Very important instructions.
In this Service Manual, the terms RIGHT and LEFT are used
to indicate the sides of the machine; these always refer to
the direction of travel of the machine.
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This note indicates that the instructions only refer to the
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A BRUSH HEAD

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TECHNICAL OFFICE
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A1 BRUSH MOTORS
The models features three head sizes, two with double brush, 600 mm / 24 in (2180SR) and 700
mm / 28 in (A670), and one with single-brush, 550 mm / 20 in (2180SR).
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TECHNICAL OFFICE
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A1.1 Checking brush motor current draw
1Make sure that the batteries on the machine are charged and that there is solution inside the tank.
2Use a clamp-on ammeter with a full scale reading of at least 200 A (amperes).
3Move the machine to the tank draining area and empty the dirty water tank.
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reading.
5Make sure that there is enough room around the machine to perform the checks safely.
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7Lift the dirty water tank and then the electronics support plate.
8Access the four-pin connector that connects the functions board.
9Identify the Red and Black power wires on the right and left brush motors.
10 Connect the clamp-on ammeter to the Red wires to read the current draw for the left and right motor.
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12 Note down the values read and compare them against the values shown in the table below.
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otherwise perform the following checks
13a Remove the brushes and check that the no-load current is within the values shown in the table.
13b Make sure that the brushes are not rubbing against the head or other parts.
F Make sure that the brush motor carbon brushes are not worn down or show signs of abnormal wear.
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13e Replace one or both brush motors.

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December 23, 2020 8 of 92
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*
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from one another.
*
Right Left

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&XUUHQWGUDZ$DPSHUHV RIGHT LEFT
Min 0D[ Min 0D[
No load (without brushes) 2,5 A 5,0 A  2,5 A 5,0 A
Load applied (brushes operating) Pressure 1 8,0 A 10,0 A  8,0 A 10,0 A
Load applied (brushes operating) Pressure 5 15,0 A 17,0 A  15,0 A 17,0 A
DOUBLE BRUSH
SINGLE BRUSH
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No load (without brushes) 2,5 A 5,0 A
Load applied (brushes operating) 9,0 A 15,0 A

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A1.2 Checking brush motor thermal protector operation
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1Use a digital multimeter able to check continuity.
2Move the machine to the tank draining area and empty the dirty water tank.
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4Make sure that there is enough room around the machine to perform the dismantling operations safely.
5Disconnect the batteries from the machine’s main circuit, and lift the electronics support plate.
6Identify the two cylindrical thermal protector connectors and disconnect them from the machine’s electrical circuit.
7Connect the digital multimeter probes to the two thermal protector connectors.
8Both thermal protectors are tested together, being connected in series.
8a If the multimeter measures continuity, the thermal protectors are working.
8b If, on the other hand, the multimeter does not measure continuity, check each individual thermal protector.
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protector or the complete motor cover.
8
8b 8b

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$$GMXVWLQJDQGUHSODFLQJWKHKHDGÀDSV
Dismantling
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2Make sure that there is enough room around the machine to perform the dismantling operations safely.
3Dismantling simply requires one 10 mm / 0,4 in spanner.
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Adjustment
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position.
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retainers.
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44
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TECHNICAL OFFICE
Stavale
December 23, 2020 12 of 92
A2 DISMANTLING THE BRUSH HEAD
The models features three head sizes, one 550 mm / 20 in version for the
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versions 2180SR and A670).
i

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A2.1 Dismantling the head on the double-brush version
Dismantling
1Move the machine to the tank draining area and completely empty both tanks.
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3Make sure that there is enough room around the machine to perform the dismantling operations safely.
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6Disconnect power to the machine using the emergency switch.
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8Reconnect power to the machine and lower the brush head using the actuator.
9Remove the bumper springs that secure the actuator to the solution tank. Remove the actuator from its housing.
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12 Tip the machine over onto its right side and pull the head
13 Unscrew the right and left bolts that limit vertical movement of the head.
14 Continue removing the head, to simplify the rest of the dismantling operations.
15 Remove the central head attachment bracket by unscrewing the two bolts.
12
13
15 15
12

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16 Electrically disconnect the two brush motors, both the power supply and the motor thermal protectors connected
to the board.
17 Unscrew the two bolts that fasten the solenoid valve to the corresponding bracket.
17
16
16
16
16

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Reassembly
1To reassemble the brush head, repeat the dismantling operations in reverse order.
2Tighten all the M8 bolts to a maximum torque of 20 Nm / ~ 177 lbf in.
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4Place the bolts that limit head movement when lowering in the hole in the centre.
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wire on plus +) for the left motor only.
6Connect the motor thermal protectors to the machine’s main wiring.
18 Unscrew the four bolts that fasten the parallelogram arms to the head plate.
19 Remove the head from underneath the machine.
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Left Right
18 3
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55

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Adjustments
1With the machine completely reassembled, make any adjustments required on the head.
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upwards (unscrew).
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PLDC04454
REVISION 00
December 23, 2020
TECHNICAL OFFICE
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A2.2 Dismantling and replacing the brush motors
Dismantling
1Move the machine to the tank draining area and completely empty both tanks.
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3Make sure that there is enough room around the machine to perform the dismantling operations safely.
4Continue removing the head as described in the previous paragraph.
5Take the head to the bench, and dismantle the faulty motor or both motors.
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8Remove the tab from the brush motor shaft.
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11 Replace the motor (or motors) with one of the same type.
Reassembly
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3Replace the tab and grease the brush motor shaft and the tab.
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69
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PLDC04454
REVISION 00
December 23, 2020
TECHNICAL OFFICE
Stavale
December 23, 2020 19 of 92
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care when positioning the brush retaining spring.
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forward travel of the machine.
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Left
Double Brush Only Single Brush - Double Brush
Right

PLDC04454
REVISION 00
December 23, 2020
TECHNICAL OFFICE
Stavale
December 23, 2020 20 of 92
A2.3 Checking and replacing the brush motor carbon brushes
Dismantling
1Move the machine to the tank draining area and completely empty both tanks.
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3Make sure that there is enough room around the machine to perform the dismantling operations safely.
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5Identify the two rocker arm catches that fasten the protective metal ties.
6Unscrew the screw that fastens the rocker arm catch to the metal tie, on both motors.
7Identify the spade terminal that connects the carbon brush to the plate, and disconnect it.
5
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