Tennant T581 Technical & Service Manual
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Tennant T581 Technical & Service Manual

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PLDC04454
REVISION DATE
December 23, 2020
DATE
December 23, 2020
TECHNICAL OFFICE
Stavale
T581
T
S
M
ECHNICAL
ERVICE
ANUAL

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Questions and answers

Ellen Booker
April 17, 2025

dirty water tank issues

0
1 comments:
Mr. Anderson
May 9, 2025

Common issues with the dirty water tank of the Tennant T581 include:

1. The tank is full and needs to be emptied.
2. The dirty water tank level sensor may need inspection or testing.
3. There may be electrical connection issues, such as a detached wire or faulty sensor.
4. Blockages or faults in connected hoses or components affecting suction.

These problems can impact machine performance and may require cleaning, reconnection, or replacement of parts.

This answer is automatically generated

0
Sergio Alves
June 27, 2025

T581 - SIZE OF THE PAD'S

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Summary of Contents for Tennant T581

  • Page 1 PLDC04454 REVISION DATE December 23, 2020 DATE December 23, 2020 TECHNICAL OFFICE Stavale T581 ECHNICAL ERVICE ANUAL...

  • Page 3: Table Of Contents

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale Contents A1.1 Checking brush motor current draw ................7 A1.2 Checking brush motor thermal protector operation ............10 ................. 11 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 ..........
  • Page 4 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale REVISIONS - UPDATES SERVICE MANUAL ............... 92...
  • Page 5 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale BRUSH HEAD WARNING! Move the machine to the tank draining area and empty the solution and dirty water tanks using the hoses provided. If necessary, place chocks under the wheels. anticlockwise and/or pressing the emergency switch. of the Anderson connector with handle.
  • Page 6 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale 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). December 23, 2020...

  • Page 7: A1.1 Checking Brush Motor Current Draw

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale A1.1 Checking brush motor current draw Make sure that the batteries on the machine are charged and that there is solution inside the tank. Use a clamp-on ammeter with a full scale reading of at least 200 A (amperes). Move the machine to the tank draining area and empty the dirty water tank.
  • Page 8 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale from one another. Right Left December 23, 2020...
  • Page 9 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale DOUBLE BRUSH RIGHT LEFT 2,5 A 5,0 A 2,5 A 5,0 A No load (without brushes) 8,0 A 10,0 A 8,0 A 10,0 A Load applied (brushes operating) Pressure 1 15,0 A 17,0 A 15,0 A 17,0 A...

  • Page 10: A1.2 Checking Brush Motor Thermal Protector Operation

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale A1.2 Checking brush motor thermal protector operation Use a digital multimeter able to check continuity. Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the dismantling operations safely. Disconnect the batteries from the machine’s main circuit, and lift the electronics support plate.
  • Page 11 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale Dismantling Make sure that there is enough room around the machine to perform the dismantling operations safely. Dismantling simply requires one 10 mm / 0,4 in spanner. Adjustment position. retainers. December 23, 2020...
  • Page 12 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale A2 DISMANTLING THE BRUSH HEAD The models features three head sizes, one 550 mm / 20 in version for the versions 2180SR and A670). December 23, 2020...

  • Page 13: A2.1 Dismantling The Head On The Double-Brush Version

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale A2.1 Dismantling the head on the double-brush version Dismantling Move the machine to the tank draining area and completely empty both tanks. Make sure that there is enough room around the machine to perform the dismantling operations safely. Disconnect power to the machine using the emergency switch.
  • Page 14 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale Tip the machine over onto its right side and pull the head Unscrew the right and left bolts that limit vertical movement of the head. Continue removing the head, to simplify the rest of the dismantling operations. Remove the central head attachment bracket by unscrewing the two bolts.
  • Page 15 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale Electrically disconnect the two brush motors, both the power supply and the motor thermal protectors connected to the board. Unscrew the two bolts that fasten the solenoid valve to the corresponding bracket. December 23, 2020...
  • Page 16 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale Unscrew the four bolts that fasten the parallelogram arms to the head plate. Remove the head from underneath the machine. Reassembly To reassemble the brush head, repeat the dismantling operations in reverse order. Tighten all the M8 bolts to a maximum torque of 20 Nm / ~ 177 lbf in.
  • Page 17 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale Adjustments With the machine completely reassembled, make any adjustments required on the head. upwards (unscrew). 2 3 4 December 23, 2020...

  • Page 18: A2.2 Dismantling And Replacing The Brush Motors

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale A2.2 Dismantling and replacing the brush motors Dismantling Move the machine to the tank draining area and completely empty both tanks. Make sure that there is enough room around the machine to perform the dismantling operations safely. Continue removing the head as described in the previous paragraph.
  • Page 19 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale care when positioning the brush retaining spring. forward travel of the machine. Right Left Double Brush Only Single Brush - Double Brush December 23, 2020...

  • Page 20: A2.3 Checking And Replacing The Brush Motor Carbon Brushes

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale A2.3 Checking and replacing the brush motor carbon brushes Dismantling Move the machine to the tank draining area and completely empty both tanks. Make sure that there is enough room around the machine to perform the dismantling operations safely. Identify the two rocker arm catches that fasten the protective metal ties.
  • Page 21 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale Lift and detach the spring that presses the carbon brush against the rotor, and remove the carbon brushes using the spade terminal. Repeat the operation for the other (three) carbon brushes, and the other motor. Always December 23, 2020...
  • Page 22 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale case not less than 8.0 mm / 0,3 in. Check the sliding contact surface of the carbon brush for signs of abnormal wear or burning. Make sure that the carbon brushes slide freely in their seats. slide freely in their seats.

  • Page 23: A2.4 Dismantling The Brush Motor Thermal Protector

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale A2.4 Dismantling the brush motor thermal protector Dismantling Move the machine to the tank draining area and completely empty both tanks. Make sure that there is enough room around the machine to perform the dismantling operations safely. protector or protectors.
  • Page 24 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale Reassembly Before assembling the new cover, check correct operation of the thermal protector. Also make sure that all the carbon brushes slide freely in their seats. Fit the new cover, performing the dismantling operations in reverse order. Pay attention to the spacer washer in the cover bearing housing.
  • Page 25 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale A3 BRUSH HEAD ACTUATOR Brush Head Model 24 in - 600 mm 28 in - 700 mm Brush Head Model 20 in - 550 mm December 23, 2020...

  • Page 26: A3.1 Checking Head Actuator Current Draw

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale A3.1 Checking head actuator current draw Make sure the batteries on the machine are charged. Use a clamp-on ammeter with a full scale reading of at least 200 A (amperes). Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the checks safely.

  • Page 27: A3.2 Checking Head Actuator Electrical Operation

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale A3.2 Checking head actuator electrical operation capacity battery with a voltage less than the standard 24 V (down to 12 V). Acquire two pieces of thin diameter wire. Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the checks safely.

  • Page 28: A3.3 Replacing The Head Actuator

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale A3.3 Replacing the head actuator Dismantling Move the machine to the tank draining area and completely empty both tanks. Make sure that there is enough room around the machine to perform the dismantling operations safely. head.
  • Page 29 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale Remove the actuator from its housing unscrew the two screws that fasten the central head attachment bracket. the machine needs to be raised to dismantle the actuator. Lift the actuator and remove it from the head actuator lifting arm Unscrew and remove the two nuts and the self-locking nut from the actuator fastening bolt.
  • Page 30 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale TANKS AND SUCTION SYSTEM WARNING! Move the machine to the tank draining area and empty the solution and dirty water tanks using the hoses provided. If necessary, place chocks under the wheels. anticlockwise and/or pressing the emergency switch.
  • Page 31 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale B1 THREE-STAGE SUCTION MOTOR wires. December 23, 2020...
  • Page 32 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale 2° 1° December 23, 2020...

  • Page 33: B1.1 Checking Suction Motor Current Draw

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale B1.1 Checking suction motor current draw Make sure the batteries on the machine are charged. Use a clamp-on ammeter with a full scale reading of at least 200 A (amperes). Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the checks safely.
  • Page 34 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale 2 Stage 3 Stage 15,0 A 20,0 A 22,0 A 27,0 A 13,0 A 19,0 A 20,0 A 25,0 A Load applied (in operation but with suction hose disconnected) December 23, 2020...

  • Page 35: B1.2 Checking And Replacing The Suction Motor Carbon Brushes

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale B1.2 Checking and replacing the suction motor carbon brushes Dismantling Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the dismantling operations safely. Lift the dirty water tank and remove the suction motor cover.

  • Page 36: B1.3 Disassembling And Replacing The Suction Motor

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale B1.3 Disassembling and replacing the suction motor Dismantling Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the dismantling operations safely. Lift the dirty water tank and remove the suction motor cover.

  • Page 37: B1.4 Replacing The Suction Motor Carbon Brushes On The Bench

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale B1.4 Replacing the suction motor carbon brushes on the bench Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the dismantling operations safely. Dismantle the suction motor as described in the previous paragraph.

  • Page 38: B1.5 Replacing The Carbon Brushes On Two-Stage Suction Motors

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale B1.5 Replacing the carbon brushes on two-stage suction motors Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the dismantling operations safely. To reach the suction motor, proceed as described for the three-stage motor.
  • Page 39 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale B2 SQUEEGEE ACTUATOR December 23, 2020...

  • Page 40: B2.1 Checking Squeegee Actuator Current Draw

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale B2.1 Checking squeegee actuator current draw Make sure the batteries on the machine are charged. Use a clamp-on ammeter with a full scale reading of at least 200 A (amperes). Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the checks safely.

  • Page 41: B2.2 Replacing The Squeegee Actuator

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale B2.2 Replacing the squeegee actuator Dismantling Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the dismantling operations safely. From the inside, disconnect the actuator power connector.

  • Page 42: B2.2 Adjusting The Squeegee

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale B2.2 Adjusting the squeegee Adjustment Make sure that there is enough room around the machine to perform the tests and adjustments safely. correct gradient all along the squeegee. squeegee bracket, and height, by adjusting the wheels. located on the squeegee support, tightening it to lower the ends of the squeegee, and vice-versa unscrewing it.
  • Page 43 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale B3 SOLENOID VALVE - CLEANING THE FILTERS over time, the more water or solution will be delivered to the brushes. December 23, 2020...

  • Page 44: B3.1 Checking Solenoid Valve Operation

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale B3.1 Checking solenoid valve operation Use a digital multimeter. Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the checks safely. Lift the dirty water tank and then the electronics mounting plate.

  • Page 45: B3.2 Inspecting And Replacing The Solenoid Valve

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale B3.2 Inspecting and replacing the solenoid valve Dismantling Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the dismantling operations safely. Lift the dirty water tank and then the electronics mounting plate.

  • Page 46: B3.3 Replacing The Complete Solenoid Valve

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale B3.3 Replacing the complete solenoid valve Dismantling Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the dismantling operations safely. Lift the dirty water tank and then the electronics mounting plate.
  • Page 47 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale Make sure that there is enough room around the machine to perform cleaning operations safely.. Dry it thoroughly before putting it back in position. Make sure that there is enough room around the machine to perform the dismantling operations safely. air and reposition it on its support.
  • Page 48 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale Clean the bottom of the cap. B and the cap C. When closing the cap, pay attention to the O-ring. O-ring December 23, 2020...
  • Page 49 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale B4 CHECKING AND REPLACING THE FLOATS away from the base. Full December 23, 2020...

  • Page 50: B4.1 Checking Operation Of The Dirty Water Tank Sensor

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale B4.1 Checking operation of the dirty water tank sensor Use a digital multimeter able to read continuity. Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the checks safely. Access the dirty water tank level sensor, as described in paragraph on dismantling.

  • Page 51: B4.2 Checking Operation Of The Solution Tank Sensor

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale B4.2 Checking operation of the solution tank sensor Use a digital multimeter able to read continuity. Then empty the tank, and check the sensor with the tank empty. Then, if necessary, add around ten litres of water to the tank and check the sensor with the tank full. Make sure that there is enough room around the machine to perform the checks safely.
  • Page 52 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale Move the machine to the tank draining area and completely empty both tanks. Make sure that there is enough room around the machine to perform the dismantling operations safely. If the malfunction is also found on the bench, replace the level sensor with a new one. December 23, 2020...
  • Page 53 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the dismantling operations safely. Lift the dirty water tank and remove the suction motor cover. Continue by dismantling the suction motor, as described in the corresponding paragraph.
  • Page 54 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale DRIVE ASSEMBLY WARNING! Move the machine to the tank draining area and empty the solution and dirty water tanks using the hoses provided. If necessary, place chocks under the wheels. anticlockwise and/or pressing the emergency switch. of the Anderson connector with handle.
  • Page 55 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale C1 DRIVE CIRCUIT BOARD DOUBLE DISC VERSION December 23, 2020...
  • Page 56 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale SINGLE DISC VERSION December 23, 2020...

  • Page 57: C1.1 Curtis Drive Board Connections

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale C1.1 Curtis drive board connections Curtis drive board logic connector. Interfaces the functions drive board to the board and instrument panel board. Curtis programmer keypad connector, for setting the standard parameters. Board, functions and drive motor negative power supply spade connector, -24 V. Make sure that the contact is Board, functions and drive motor positive power supply spade connector, +24 V.

  • Page 58: C1.2 Italsea Drive Board Connections

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale C1.2 Italsea drive board connections Curtis drive board logic connector. Interfaces the functions drive board to the board and instrument panel board. Curtis programmer keypad connector, for setting the standard parameters. Screw contact for board, functions and drive motor negative power supply, -24 V. Tighten moderately or to Screw contact for board, functions and drive motor positive power supply, +24 V.

  • Page 59: C1.3 Dismantling The Curtis Drive Board

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale C1.3 Dismantling the Curtis drive board Dismantling Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the dismantling operations safely. Disconnect the batteries from the machine’s main wiring, using the ”emergency”...
  • Page 60 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale ALL MODELS December 23, 2020...

  • Page 61: C2.1 Checking Drive Motor Current Draw

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale C2.1 Checking drive motor current draw Make sure the batteries on the machine are charged. Use a clamp-on ammeter with a full scale reading of at least 200 A (amperes). Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the checks safely.

  • Page 62: C2.2 Checking And Replacing The Drive Motor Electric Brake

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale C2.2 Checking and replacing the drive motor electric brake Make sure the batteries on the machine are charged. Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the checks safely.
  • Page 63 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale Dismantling Remove the electric brake by pulling it outwards horizontally, and replace it with a new one. them. Reassembly Before replacing the electric brake, make sure that inside everything is in order and there is no dirt. It is recommended to release the brake for assembly, thus allowing the inside disc to move.

  • Page 64: C2.3 Checking And Replacing The Drive Wheel Carbon Brushes

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale C2.3 Checking and replacing the drive wheel carbon brushes Dismantling Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the dismantling operations safely. If available, use a lift table.
  • Page 65 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale Reassembly If necessary, replace the carbon brushes with others of the same type and size, with reference to the Make sure that the carbon brushes slide freely in their seats. Position the carbon brushes to allow reassembly of the cover on the motor body. Pull the carbon brushes backwards so that the springs hold them in position for assembly.

  • Page 66: C2.4 Checking And Replacing The Drive Motor Thermal Protector

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale C2.4 Checking and replacing the drive motor thermal protector Use a digital multimeter able to read continuity. Make sure that there is enough room around the machine to perform the dismantling operations safely. Disconnect the thermal protector from the main wiring ,and use the multimeter to check continuity.

  • Page 67: C2.5 Replacing The Drive Motor Rubber Ring

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale C2.5 Replacing the drive motor rubber ring Dismantling Move the machine to the tank draining area and completely empty both tanks. Make sure that there is enough room around the machine to perform the dismantling operations safely. If available, use a lift table.
  • Page 68 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale Reassembly To assemble the rubber ring, acquire bolts similar to the ones removed, however longer, or otherwise much ring to be inserted without needing to use a rubber mallet. 8 Nm / ~ 71 lbf in 20 Nm / ~ 177 lbf in 8 Nm / ~ 71 lbf in...

  • Page 69: C2.6 Replacing The Drive Motor

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale C2.6 Replacing the drive motor Dismantling Move the machine to the tank draining area and completely empty both tanks. Make sure that there is enough room around the machine to perform the dismantling operations safely. Block the wheels using chocks to prevent the machine from moving during dismantling.
  • Page 70 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale C3 ACCELERATOR PEDAL December 23, 2020...

  • Page 71: C3.1 Dismantling And/Or Replacing The Accelerator Pedal

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale C3.1 Dismantling and/or replacing the accelerator pedal Dismantling Make sure that there is enough room around the machine to perform the dismantling operations safely. To ensure safety, disconnect the battery from the main wiring, using the “emergency” switch underneath the seat. Pull the two accelerator pedal connectors (microswitch, potentiometer) downwards and disconnect them.

  • Page 72: C3.2 Checking The Pedal Potentiometer And Microswitch

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale C3.2 Checking the pedal potentiometer and microswitch. Dismantling Use a digital multimeter able to read electrical resistor and check continuity. Make sure that there is enough room around the machine to perform the dismantling operations safely. Dismantle the accelerator pedal, as shown in the previous paragraph, and take it to the bench.
  • Page 73 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale Set the digital multimeter to measure continuity. Connect the accelerator pedal two-pin connector to the digital multimeter, in either direction. With the accelerator pedal in the neutral position, there should be no continuity - circuit open. When pushing the accelerator pedal just a few millimetres, the multimeter should read continuity - circuit closed.

  • Page 74: C3.3 Replacing The Pedal Potentiometer And Microswitch

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale C3.3 Replacing the pedal potentiometer and microswitch. Dismantling Use a digital multimeter able to read electrical resistor and check continuity. Dismantle the accelerator pedal, as shown in the previous paragraph, and take it to the bench. Remove the accelerator pedal foot pad and cover.

  • Page 75: C3.4 Adjusting The Pedal Potentiometer And Microswitch

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale C3.4 Adjusting the pedal potentiometer and microswitch. With the pedal completely raised, move the small wheel alongside to the pedal cam. rotation of the pedal cam. On completion moderately tighten the two bolts so as to fasten the microswitch in position. Then adjust the potentiometer.
  • Page 76 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale Turn to the potentiometer shaft to zero. Connect the digital multimeter to the potentiometer, see paragraph C3.2, and turn the potentiometer shaft until reading a value between 200 Ohms and 800 Ohms, as close to the minimum value as possible. Slightly tighten the dowel on the accelerator pedal shaft, so that the shaft can rotate with just slight resistance, for If the adjustment is correct, tighten the dowel through the hole on the cover.
  • Page 77 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale CIRCUIT BOARDS, WIRING WARNING! Move the machine to the tank draining area and empty the solution and dirty water tanks using the hoses provided. If necessary, place chocks under the wheels. anticlockwise and/or pressing the emergency switch. of the Anderson connector with handle.
  • Page 78 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale D1 INSTRUMENT PANEL BOARD warnings more immediate. to and read from an SD CARD, December 23, 2020...

  • Page 79: D1.1 Programming The Board - Technical Menu

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale D1.1 Programming the board - Technical menu Programming Deactivate any active functions. Press the “+” and “-” buttons together, until changing screen. The “+” button scrolls forwards in the list of the parameters or increases the value of the parameter. The “-”...

  • Page 80: D1.2 Dismantling The Instrument Panel Board

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale D1.2 Dismantling the instrument panel board Dismantling Make sure that there is enough room around the machine to perform the dismantling operations safely. To ensure safety, disconnect the battery from the main wiring, using the “emergency” switch underneath the seat. Remove the plastic front panel by unscrewing the four screws on the two sides, and the two behind to the front panel.
  • Page 81 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale Dismantling Make sure that there is enough room around the machine to perform the dismantling operations safely. To ensure safety, disconnect the battery from the main wiring, using the “emergency” switch underneath the seat. Remove the plastic front panel by unscrewing the four screws on the two sides, and the two behind to the front panel.
  • Page 82 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale D2 FUNCTIONS CIRCUIT BOARD December 23, 2020...

  • Page 83: D2.1 Functions Board Connections

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale D2.1 Functions board connections Brush motor connector, protected by 30 A fuse/fuses A1. Positive connection pole, the point where the board draws +24 V power. Drive board communication logic connector. Alarm detection logic connector (thermal protectors, level sensors, seat microswitch). Functions logic connector, solenoid valve, audible warning, chemicals.

  • Page 84: D2.2 Dismantling The Functions Board

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale D2.2 Dismantling the functions board Dismantling Move the machine to the tank draining area and empty the dirty water tank. Make sure that there is enough room around the machine to perform the dismantling operations safely. Disconnect the batteries from the machine’s main wiring, using the ”emergency”...

  • Page 85: D3.1 Electrical Wiring Diagrams Single Disc Version

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale D3.1 February 09, 2021...

  • Page 86: D3.2 Electrical Wiring Diagrams Double Disc Version

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale D3.2 February 09, 2021...
  • Page 87 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale ERROR CODES - TROUBLESHOOTING WARNING! Move the machine to the tank draining area and empty the solution and dirty water tanks using the hoses provided. necessary, place chocks under the wheels. anticlockwise and/or pressing the emergency switch. i INFORMATION Very important instructions In this Service Manual, the terms RIGHT and LEFT...

  • Page 88: E1.1 Instrument Panel Board Display Alarms

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale E1 ERROR CODES E1.1 Instrument panel board display alarms ALARMS POSSIBLE CAUSES REMEDY The brush motor has overheated. Wait for the brush motors to cool down. BRUSH THERMAL Faulty thermal protector contact on the motors. Replace the brush motor.

  • Page 89: E1.2 Drive Board Display Alarms

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale E1.2 Drive board display alarms ALARMS POSSIBLE CAUSES REMEDY Board temperature between -10°C and +80°C. Cool or heat the board. DRIVE BOARD Do not overwork the machine on long ramps. TEMPERATURE Electric brake engaged. Check the electric brake.

  • Page 90: E2.1 Troubleshooting

    PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale E2 TROUBLESHOOTING E2.1 Troubleshooting PROBLEM CAUSE REMEDY The batteries are disconnected Connect the batteries to the machine THE MACHINE DOES NOT WORK Recharge the batteries Battery disconnect lever pressed Return the lever to its correct position The dirty water tank is full Empty the dirty water tank Blown fuse...
  • Page 91 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale PROBLEM CAUSE REMEDY The dirty water tank is full Empty the dirty water tank Blown fuse Replace Faulty switch Replace THE SUCTION MOTOR DOES NOT START Recharge the batteries Damaged motor Replace Wire detached Check The edge of the rubber blades in contact with...
  • Page 92 PLDC04454 REVISION December 23, 2020 TECHNICAL OFFICE Stavale REVISIONS - UPDATES SERVICE MANUAL EDITION No. DATE Edition 00. Technical Service Manual for Tennant December 23, 2020...

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