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Tennant T291 Technical & Service Manual
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Tennant T291 Technical & Service Manual

Tennant T291 Technical & Service Manual

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PLDC04702
REVISION DATE
February 22, 2024
DATE
February 22, 2024
TECHNICAL OFFICE
Stavale
T291 - T391
T
S
M
ECHNICAL
ERVICE
ANUAL

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Summary of Contents for Tennant T291

  • Page 1 PLDC04702 REVISION DATE February 22, 2024 DATE February 22, 2024 TECHNICAL OFFICE Stavale T291 - T391 ECHNICAL ERVICE ANUAL...

  • Page 3: Table Of Contents

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale Contents A1.1 Checking the motor current draw — single brush head ..........6 A1.2 Checking the motor current draw — double brush head ..........7 A1.3 Replacing the brush motor carbon brushes ..............8 A1.4 Replacing the brush motor ....................
  • Page 4 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale BRUSH UNIT IMPORTANT Take the machine to the service area and empty the detergent solution and dirty water tanks. Position the machine on a level surface and apply the brake. Immobilize the wheels with chocks, if necessary. Disconnect the battery and remove it from its housing in the machine.
  • Page 5 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale A1 BRUSH MOTOR The brush motors of single brush and double brush scrubber dryers are very similar to one case of the single brush version, which is also the more powerful of the two versions. brush motor.

  • Page 6: A1.1 Checking The Motor Current Draw - Single Brush Head

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale A1.1 Checking the motor current draw — single brush head Make certain that the batteries of the machine are charged at 24V ± 1V. Procure a current clamp with a reading capability of at least 100 A (Amperes). Remove the valance, locate the Red wire of the brush motor and attach the clamp meter to it.

  • Page 7: A1.2 Checking The Motor Current Draw - Double Brush Head

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale A1.2 Checking the motor current draw — double brush head Make certain that the batteries of the machine are charged at 24V ± 1V. Procure a current clamp with a reading capability of at least 100 A (Amperes). Remove the valance, and locate the Red wire of each brush motor.

  • Page 8: A1.3 Replacing The Brush Motor Carbon Brushes

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale A1.3 Replacing the brush motor carbon brushes Take the machine to the service area and empty the dirty water tank. To facilitate the procedure, lower the brush head. Tilt the tank, locate the Anderson connector of the brush motor/s and unplug. Locate the screw securing the metal protector strap and unfasten.

  • Page 9: A1.4 Replacing The Brush Motor

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale A1.4 Replacing the brush motor Disassembly safety. Remove the valance covering the motor/s, loosening the four (4) lateral screws and removing the front screw. Proceed to detach the brush head from the frame of the machine. For “B”...
  • Page 10 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale Position the bolts as illustrated, and ensure the tips of the bolts are not driven against the brush head. February 22, 2024...

  • Page 11: A1.5 Replacing The Solenoid Valve

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale A1.5 Replacing the solenoid valve Disassembly Remove the valance covering the motor/s, loosening the four (4) lateral screws and removing the front screw. Disconnect the solenoid from the power source by detaching the two Faston clips. Unscrew the wing nut to separate the solenoid valve from the brush head.

  • Page 12: A1.6 Replacing The Actuator

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale A1.6 Replacing the actuator Disassembly Take the machine to the service area and empty the detergent solution and dirty water tanks. safety. Remove the valance covering the motor/s, loosening the four (4) lateral screws and removing the front screw. Tilt up the tanks and secure them in the raised position with the locking lever.
  • Page 13 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale Remove the bottom pivot of the actuator from the brush head bracket. Disconnect the actuator cable from the power and services circuit board, and pull the cable free. Remove the R-clip from the top pivot of the actuator and remove the pin from the actuator bracket lever. Replace the actuator with an identical new part.
  • Page 14 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale Assembly Connect the actuator to the lever of the actuator bracket by means of the top pivot and secure with the R-clip. Using a screwdriver, ease the inner coil spring of the rod upwards and insert the pivot. Slide the pivot through completely, making certain it is located correctly below the inner spring.

  • Page 15: Vacuum Unit

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale VACUUM UNIT IMPORTANT Take the machine to the service area and empty the detergent solution and dirty water tanks. Position the machine on a level surface and apply the brake. Immobilize the wheels with chocks, if necessary. Disconnect the battery and remove it from its housing in the machine.
  • Page 16 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale B1 Vacuum motor February 22, 2024...

  • Page 17: B1.1 Checking The Vacuum Motor Current Draw

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale B1.1 Checking the vacuum motor current draw Make certain that the batteries of the machine are charged at 24V ± 1V. Procure a current clamp with a reading capability of at least 100 A (Amperes). Take the machine to the service area and empty the detergent solution and dirty water tanks.
  • Page 18 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale February 22, 2024...

  • Page 19: B1.2 Disassembly Of Vacuum Fan Unit

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale B1.2 Disassembly of vacuum fan unit Take the machine to the service area and empty the detergent solution and dirty water tanks. safety. February 22, 2024...
  • Page 20 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale February 22, 2024...

  • Page 21: Level Sensor

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale LEVEL SENSOR February 22, 2024...

  • Page 22: B2.1 Detergent Solution Tank Level Sensor

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale B2.1 Detergent Solution Tank Level Sensor Take the machine to the service area and empty the detergent solution and dirty water tanks. safety. Do not overtighten the nut securing the level sensor. February 22, 2024...

  • Page 23: B2.2 Detergent Solution Tank Level Sensor

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale B2.2 Detergent Solution Tank Level Sensor Take the machine to the service area and empty the dirty water tank. safety. Do not overtighten the nut securing the level sensor. February 22, 2024...

  • Page 24: Traction Unit

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale TRACTION UNIT IMPORTANT Take the machine to the service area and empty the detergent solution and dirty water tanks. Position the machine on a level surface and apply the brake. Immobilize the wheels with chocks, if necessary. Disconnect the battery and remove it from its housing in the machine.
  • Page 25 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale C1 DIFFERENTIAL GEARED MOTOR shafts disposed parallel with the motor shaft), rated power 200W at 24Vdc. February 22, 2024...
  • Page 26 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale Check February 22, 2024...
  • Page 27 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale 1.9 A 2.5 A February 22, 2024...
  • Page 28 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale February 22, 2024...
  • Page 29 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale Check February 22, 2024...
  • Page 30 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale February 22, 2024...
  • Page 31 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale 12 13 14 February 22, 2024...

  • Page 32: C1.4 Replacing Components Of The Traction Unit

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale February 22, 2024...
  • Page 33 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale February 22, 2024...
  • Page 34 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale February 22, 2024...
  • Page 35 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale February 22, 2024...
  • Page 36 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale The oil seals must be of the same type as those removed, size: Type: SC (without dust lip) Size: 12 mm / 0.47 in (internal diameter) x 22 mm / 0.87 in (external diameter) x 5 mm / 0.20 in (height). February 22, 2024...
  • Page 37 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale H and M D and then the rotor C February 22, 2024...
  • Page 38 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti CIRCUIT BOARDS - ELECTRICAL SYSTEM CAUTION Take the machine to the service area and empty the deter- gent solution and dirty water tanks. Position the machine on a level surface and apply the brake. Immobilize the wheels with chocks, if necessary.
  • Page 39 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti HANDGRIP - CONTROL PANEL The plastic handgrip created especially for this machine is of ergonomic design, allowing full control of operation and motion in all directions. The paddle style operating lever on the front of the handgrip, of horizontal C-shape, is easily depressed whatever the position of the handgrip, which facilitates its use when working with the machine.

  • Page 40: D1.1 Disassembly And Replacement Of Handgrip Components - Version B

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti D1.1 Disassembly and replacement of handgrip components — version B Disassembly February 22, 2024...
  • Page 41 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti Reassembly Disassembly of control panel circuit board February 22, 2024...
  • Page 42 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti Reassembly Disassembly of Rotary Selector Reassembly February 22, 2024...
  • Page 43 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti Disassembly of reed sensor Reassembly February 22, 2024...

  • Page 44: D1.2 Disassembly And Replacement Of Handgrip Components - Version Bt

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti D1.2 Disassembly and replacement of handgrip components — version BT Disassembly safety. F.G. R.G. Reassembly February 22, 2024...
  • Page 45 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti Disassembly of Traction Potentiometer Reassembly For indications on removal of the reed sensor and of the rotary selector, refer to the previous section. February 22, 2024...
  • Page 46 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti Disassembly of Traction Potentiometer Reassembly Be certain to retain the spacer washers located under the screw heads: these serve as depth stops for the screws. When driving screws into plastic, do not overtighten. February 22, 2024...
  • Page 47 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti the circuit board controlling startup of the brush motor and the vacuum motor is electromechanical in operation. Compo- nents mounted on the pcb include a contactor (Relay1) controlling the brush motor and two re- lays, one (Relay2) controlling the vacuum motor and one (Relay3) controlling the brush release mechanism.
  • Page 48 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti In the case of machines equipped with traction motor, all services are controlled by the circuit board electronically, through the agency of mosfets or transistors. The pcb is arranged on two levels, of which the upper level is dedicated to control logic functions, and the lower level to operation of the power circuits (mosfet).

  • Page 49: D2.1 Disassembly And Replacement Of Power Circuit Board

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti D2.1 Disassembly and replacement of power circuit board Disassembly Take the machine to the service area and empty the detergent solution and dirty water tanks. safety. Disconnect the batteries from the machine Disconnect the batteries before commencing disassembly operations February 22, 2024...
  • Page 50 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti The 50A blade fuse (coloured red) serves a dual function, protecting the system during a recharge when an external battery charger is connected to the Anderson socket, and from a possible brush motor fault (short circuit or abnormally high current draw). February 22, 2024...
  • Page 51 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti With the exception of the contactor, all components of the power circuit board that are liable to failure can be replaced individually, without the need to remove the board. Reassembly February 22, 2024...

  • Page 52: D2.2 Disassembly And Replacement Of Power Circuit Board With Traction

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti D2.2 Disassembly and replacement of power circuit board with Traction Disassembly Take the machine to the service area and empty the detergent solution and dirty water tanks. safety. Disconnect the batteries from the machine Disconnect the batteries before commencing disassembly operations February 22, 2024...
  • Page 53 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti February 22, 2024...
  • Page 54 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti Reassembly February 22, 2024...
  • Page 55 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti NANO CLEAN The ec-H2O NanoClean system consists of several main parts; 1 ec-H2O module, 2 Water con- ditioning cartridge, 3 Dispenser pump unit, 4 Pressure switch, 5 Control valve, 6 Pump, Wiring, February 22, 2024...

  • Page 56: D3.1 Disassembly And Replacement Of The Ec-H2O Nanoclean Module

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti D3.1 Disassembly and replacement of the ec-H2o NanoClean module When replacing the ec-H2O NanoClean module, the water conditioning cartridge must also be replaced. To avoid potential encrustations in the new module, it is important to replace the existing water conditioning cartridge when installing a new module.
  • Page 57 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti Reassembly Solution Flow Machine/Scrub Indicator Lights Head Size February 22, 2024...

  • Page 58: D3.2 Disassembly And Replacement Of The Conditioning Cartridge

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti D3.2 Disassembly and replacement of the conditioning cartridge Disassembly Take the machine to the service area and empty the detergent solution and dirty water tanks. Disconnect the batteries from the machine February 22, 2024...
  • Page 59 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti Reassembly February 22, 2024...

  • Page 60: D3.3 Disassembly And Replacement Of The Dispenser Pump Unit

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti D3.3 Disassembly and replacement of the dispenser pump unit Disassembly Take the machine to the service area and empty the detergent solution and dirty water tanks. Disconnect the batteries from the machine Reassembly February 22, 2024...

  • Page 61: D3.4 Disassembly And Replacement Of The Pressure Switch

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti D3.4 Disassembly and replacement of the pressure switch Disassembly Take the machine to the service area and empty the detergent solution and dirty water tanks. 9 10-11 Reassembly February 22, 2024...

  • Page 62: D3.5 Disassembly And Replacement Of The Control Valve

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti D3.5 Disassembly and replacement of the control valve Disassembly Take the machine to the service area and empty the detergent solution and dirty water tanks. Reassembly February 22, 2024...

  • Page 63: D3.6 Disassembly And Replacement Of The Pump

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti D3.6 Disassembly and replacement of the pump Disassembly Take the machine to the service area and empty the detergent solution and dirty water tanks. Reassembly February 22, 2024...

  • Page 64: D3.7 Replacement Of Relays And Fuses

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti D3.7 Replacement of relays and fuses Disassembly Take the machine to the service area and empty the detergent solution and dirty water tanks. Reassembly February 22, 2024...

  • Page 65: D3.8 Disassembly And Replacement Of Switches And Leds

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti D3.8 Disassembly and replacement of switches and LEDs Disassembly Reassembly February 22, 2024...
  • Page 66 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti ec-H20 NanoClean Troubleshooting Guide INTRODUCTION 0x0702 February 22, 2024...
  • Page 67 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti ec-H20 NanoClean General Troubleshooting Behavior Causes Actions February 22, 2024...
  • Page 68 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti Behavior Causes Actions February 22, 2024...
  • Page 69 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti February 22, 2024...
  • Page 70 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti February 22, 2024...
  • Page 71 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti February 22, 2024...
  • Page 72 PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti February 22, 2024...

  • Page 73: Electrical System

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti ELECTRICAL SYSTEM D4.1 Wiring diagram for B version February 22, 2024...

  • Page 74: D4.2 Wiring Diagram For Bt Version

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti D4.2 Wiring diagram for BT version February 22, 2024...

  • Page 75: D4.3 Wiring Diagram For B Nano-Clean Version

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti D4.3 Wiring diagram for B Nano-Clean version February 22, 2024...

  • Page 76: D4.4 Wiring Diagram For Bt Nano- Clean Version

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Mercanti D4.4 Wiring diagram for BT Nano- Clean version February 22, 2024...

  • Page 77: Error Codes - Troubleshooting

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale ERROR CODES - TROUBLESHOOTING IMPORTANT Take the machine to the service area and empty the detergent solution and dirty water tanks. Position the machine on a level surface and apply the brake. Immobilize the wheels with chocks, if necessary.

  • Page 78: E1.1 Technical Menu

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale E1 TECHNICAL MENU E1.1 Technical Menu February 22, 2024...

  • Page 79: E2.1 Alarm Display Messages

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale E2 ERROR CODES E2.1 Alarm display messages February 22, 2024...

  • Page 80: E3.1 Troubleshooting

    PLDC04702 REVISION 01 February 22, 2024 TECHNICAL OFFICE Stavale E3 TROUBLESHOOTING E3.1 Troubleshooting February 22, 2024...

  • Page 81: Revision - Technical Service Manual Updates

    PLDC04702 REVISION 01 February 22, 2023 TECHNICAL OFFICE Stavale REVISION - TECHNICAL SERVICE MANUAL UPDATES REVISION N° DATE Revision 00 Completion of work on producing manual February 13, 2023 Revision 01 Added Nano-Clean Paragraph D - T.O. Mercanti February 22, 2024 February 22, 2024...

This manual is also suitable for:

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