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Nobles Tennant S7 Technical & Service Manual
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Nobles Tennant S7 Technical & Service Manual

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PLDC04364
REVISION DATE
December 16, 2020
DATE
December 17, 2020
TECHNICAL OFFICE
S7 / Scout 7
T
S
M
ECHNICAL
ERVICE
ANUAL

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Summary of Contents for Nobles Tennant S7

  • Page 1 PLDC04364 REVISION DATE December 16, 2020 DATE December 17, 2020 TECHNICAL OFFICE S7 / Scout 7 ECHNICAL ERVICE ANUAL...
  • Page 3 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Contents A1.1 Checking main brush motor current draw..............7 A1.2 Checking and replacing the main brush motor carbon brushes ........8 A1.3 Replacing the main brush motor ................... 11 A1.4 Replacing the main brush .................... 13 A1.5 Adjusting the height of the main brush ................
  • Page 4 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE...
  • Page 5 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE BRUSH UNIT IMPORTANT Take the machine to the waste disposal area, clean the i INFORMATION Important information December 17, 2020...
  • Page 6 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE A1 MAIN BRUSH MOTOR / DRIVE MOTOR The motor of the centre brush or drive motor is equipped with a right angle or bevel helical gear reducer with worm gear drive, the rotor shaft having a double-start thread. The maximum rotational speed at the gear reducer output shaft is 210 rpm.
  • Page 7 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Turn the front cowling and, after undoing the screws, remove the top cowling to access the battery compartment. Remove the left side guard and locate the brush motor. Pick out the Red wire of the centre brush motor and apply the clamp-on ammeter to it. Operate the main brush motor from the control panel by turning the key switch to the “I”...
  • Page 8 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE To verify the extent of wear on the carbon brushes and replace them if necessary, simply remove the motor end cap. Disassembly Turn the front cowling and, after undoing the screws, remove the top cowling to access the battery compartment. Disconnect the two connectors of the three motors.
  • Page 9 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Checks Check the sliding contact surface of the carbon brushes for signs of abnormal wear or burning and possibly re- place them even if still within tolerance. Measure the carbon brush to determine wear, and then compare the values against those shown below. In the event that the measurement is close to the value indicated in the table, replace the carbon brush after detaching it from the end cap.
  • Page 10 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Reassembly Position the shims on the rotor in the correct order: the white one (usually one) resting on the bearing and the black one (one or two) between the gear reducer and the bearing (depending on the thickness) and resting on the gear reducer.
  • Page 11 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Disassembly Turn the front cowling and, after undoing the screws, remove the top cowling to access the battery compartment. Disconnect the battery and remove it. Disconnect the two connectors of the three motors from the main wiring and release the cables from the clamps. Remove the left side guard and locate brush motor.
  • Page 12 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE brush motor. Remove the motor and take it to the bench for overhaul or complete replacement. When disassembling, pay attention to the tab on the brush motor shaft. In case of replacement of the brush motor it must be reused for the new motor.
  • Page 13 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE The brush will need to be replaced generally as the result of normal wear. Disassembly Turn the front cowling and, after undoing the screws, remove the top cowling to access the battery compartment. Disconnect and remove the battery.
  • Page 14 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Adjustment Turn the front cowling and pick out the adjustment knob. If the brush is correctly adjusted, the bristles will be slightly bent backwards with respect to the rolling direction, which must be in the opposite direction to the advancement, to ensure a slight pressure on the ground. Always check the consumption of the centre brush and adjust the height as needed.
  • Page 15 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Disassembly Turn the front cowling and, after undoing the screws, remove the top cowling to access the battery compartment. Disconnect and remove the battery. Lie the machine down on its left side to facilitate disassembly of the plastic side. To undo the screw that secures the wheel, hold the wheel steady and unscrew or use a pulse screwdriver.
  • Page 16 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Unscrew the four Allen screws, the self-tapping screw and remove the right side guard. Check the round belt for wear. Reassembly To reassemble, repeat the disassembly operations in reverse order. December 17, 2020...
  • Page 17 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE The belts are usually replaced after breakage. However, in order to avoid machine downtime, it may be useful to replace the belts in advance, before they break. Belt wear is showing on the surface in contact with the pulleys, smoother and with small cracks, in addition to loss of elasticity with consequent elongation of the belt.
  • Page 18 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Unscrew the pin of the brush lifting arm, then move the arm forward to release it from the shaft. Remove the worn belt from the drive shaft with driven gear. 30 N·m / 265.5 lbf·in Reassembly Return the tension roller to the bottom of the adjustment slot and tighten the bolt.

  • Page 19: Suction Unit

    PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE SUCTION UNIT IMPORTANT Take the machine to the waste disposal area, clean the i INFORMATION Important information December 17, 2020...
  • Page 20 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE B1 SUCTION MOTOR The function of the extractor fan is to vacuum up the dust raised by the revolving brush during be left or anticlockwise. The maximum rotation is 3500 rpm, while the electric motor rated power is 30 W.
  • Page 21 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Turn the front cowling and, after undoing the screws, remove the top cowling to access the battery compartment. Insert a shim under the front wheel to prevent the centre brush from coming into contact with the ground. Pick out the blue wire of the suction motor and connect the clamp-on ammeter to it.
  • Page 22 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Depending on the direction in which the current crosses the callipers, and therefore on the wire chosen for the measurement, the instrument may read negative values. This is not an error. The absolute value must be taken into account (without + or -). In case of a negative value, to read the positive value, simply reverse the position of the callipers.
  • Page 23 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Disassembly Turn the front cowling and, after undoing the screws, remove the top cowling to access the battery compartment. Disconnect and remove the battery from the machine. Disconnect the two connectors of the three motors. Undo the two screws to remove the belt guard and access the engine.
  • Page 24 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Remove the battery charger and the special bag for the charging cable from its support plate, after undoing the two screws for the battery charger and the two for the bag. December 17, 2020...
  • Page 25 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Before removing the motor support plate, detach the brush motor cables from the two connectors. Remove the motor plate together with the motors and take it to the bench for overhaul or replacement of the motors.
  • Page 26 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Replacement In case of replacement of the motor, disconnect the power supply cables from the connector and remove the suction motor from its support plate. Replace the motor. Reassembly To reassemble, repeat the disassembly operations in reverse order. December 17, 2020...
  • Page 27 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE To inspect the extent of wear on the carbon brushes and replace them if necessary, simply remove the motor end cap. Disassembly Remove the battery. Disassemble the battery charger support bracket complete with battery charger and cable bag. Undo the two screws on the vacuum motor end cap and remove it.
  • Page 28 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Checks Check the sliding contact surface of the carbon brushes for signs of abnormal wear or burning and possibly re- place them even if still within tolerance. Measure the carbon brush to determine wear, and then compare the values against those shown below. In the event that the measurement is close to the value indicated in the table, replace the carbon brush after detaching it from the end cap.
  • Page 29 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Reassembly Position the shims on the rotor in the correct order: the white one (usually one) resting on the bearing and the black one (one or two) between the gear reducer and the bearing (depending on the thickness) and resting on the gear reducer.
  • Page 30 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE outside of the electric motor shaft that, when rotating, create strong vibrations across the speed of 4200 rpm. debris, such as leaves, and ensure a longer working life, extending the replacement time for December 17, 2020...
  • Page 31 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Turn the key to position "I" to turn on the machine: the brush will start turning. ". Keep the button pressed until the current draw stabilizes, read the value on the clamp-on ammeter and compare it with that in the table.
  • Page 32 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Conversely, if the value is at variance with those indicated in the table, proceed to make the following checks. Current draw A (amperes) 4.8 A 5.9 A December 17, 2020...
  • Page 33 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Disassembly Turn the front cowling and, after undoing the screws, remove the top cowling to access the battery compartment. Disconnect and remove the battery from the machine. Remove the complete control panel by undoing the four screws on the sides. Reassembly To reassemble, repeat the disassembly steps in reverse order.

  • Page 34: Drive Unit

    PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE DRIVE UNIT IMPORTANT Move the machine to the waste disposal area, clean the i INFORMATION Important information December 17, 2020...
  • Page 35 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE C1 TRACTION MOTOR / CENTRE BRUSH MOTOR The drive motor or centre brush motor is equipped with an angle or bevel helical gear reducer with worm gear drive, the rotor shaft having a double-start thread. The maximum rotational speed at the gear reducer output shaft is 210 rpm.
  • Page 36 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Turn the front cowling and, after undoing the screws, remove the top cowling to access the drive motor. Raise both rear wheels high enough not to touch the ground. Pick out the red wire of the drive motor and connect the clamp-on ammeter to it. Turn the key to position "I"...
  • Page 37 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Remove the belt from the drive motor pulley and check the no-load current draw. If the reading is outside of the values shown in the table (usually higher), check motor carbon brush wear. If the reading is included in the values in the table below, rotate the wheels by hand to check that the bearings If necessary, replace the drive motor with a new one.
  • Page 38 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Belt wear can be seen on the surface in contact with the pulleys, which is smoother and shows small cracks, as well as by fraying on the outside of the belt, or evident cuts due to foreign bodies wedged between the belt and the pulley.
  • Page 39 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE The drive belt will need replacing typically when worn to the point of breaking. However, in order to avoid machine downtime, it may be useful to replace the belts in advance, before they break.
  • Page 40 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Undo the four Allen screws, the self-tapping screw and remove the left side guard. Undo the two screws to remove the belt guard. Unseat the belt from the small pulley mounted on the drive lever. Remove the belt and replace it with a new one.
  • Page 41 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Disassembly Turn the front cowling and, after undoing the screws, remove the top cowling to access the drive motor. Disconnect and remove the battery from the machine. Disconnect the two connectors of the three motors. Undo the two screws to remove the plastic protection and access the motor.
  • Page 42 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Detach the drive motor cables from the two connectors. Unscrew the three Allen screws to remove the plastic centering device with bearing and the drive motor. Remove the key from the drive motor shaft and reuse it for the new motor. Rotate the motor counterclockwise and pull it out of the support plate.
  • Page 43 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE To inspect the extent of wear on the carbon brushes and replace them, if necessary, simply remove the motor end cap. Disassembly Turn the front cowling and, after undoing the screws, remove the top cowling to access the battery compartment. Disconnect the battery from the machine.
  • Page 44 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Undo the two screws on the drive motor securing the hood and lift the latter. Pay attention to the shims on the rotor shaft, the number and their position. December 17, 2020...
  • Page 45 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Checks Check the sliding contact surface of the carbon brushes for signs of abnormal wear or burning and possibly re- place them even if still within tolerance. Measure the carbon brush to determine wear, and then compare the values against those shown below. In the event that the measurement is close to the value indicated in the table, replace the carbon brush after detaching it from the end cap.
  • Page 46 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Reassembly Position the shims on the rotor in the correct order: the white one (usually one) resting on the bearing and the black one (one or two) between the gear reducer and the bearing (depending on the thickness) and resting on the gear reducer.
  • Page 47 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE IMPORTANT Move the machine to the waste disposal area, clean the i INFORMATION Important information December 17, 2020...
  • Page 48 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE D1 CONTROL PANEL BOARD The control panel board has the function of showing the machine operation status through LEDs. It is equipped with three LEDs, Red, Yellow, Green, to indicate the charge level of the battery, and two green LEDs indicating the machine is ON and the central brush active together with the extractor fan, provided the switch on the control panel in ON.
  • Page 49 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE If when turning the key to the start position “I”, with charged batteries, nothing turns on, check Checks Make sure that there is enough room around the machine to perform the dismantling operations safely. Turn the front cowling and, after undoing the screws, remove the top cowling to access the battery compartment.
  • Page 50 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Undo the 4 screws that secure the protective guard to access the display board. Visually check that the fuse is not blown: if necessary, check it with a multimeter. Position the red probe on one end of the fuse, the black probe on the other end and check that the multimeter emits a continuous sound.
  • Page 51 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE If when turning the key to the start position "I", with charged batteries, only the battery charge Checks Make sure that there is enough room around the machine to perform the dismantling operations safely. Turn the front cowling and, after undoing the screws, remove the top cowling to access the battery compartment.
  • Page 52 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Undo the 4 screws that secure the protective guard to access the display board. Visually check that the fuse is not blown: if necessary, check it with a multimeter. Position the red probe on one end of the fuse, the black probe on the other end and check that the multimeter emits a continuous sound.
  • Page 53 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Disassembly Make sure that there is enough room around the machine to perform the dismantling operations safely. Turn the front cowling and, after undoing the screws, remove the top cowling to access the battery compartment. Disconnect the control panel connectors from the main wiring.
  • Page 54 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE Disconnect the two fast-ons from the ignition key. Unscrew the 4 studs to remove the display board from the control panel. Release the board by pulling the 3 wires out of the hole provided. Replace the display circuit board.
  • Page 55 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE D2 ELECTRICAL SYSTEM December 17, 2020...

  • Page 56: Error Codes - Troubleshooting

    PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE ERROR CODES - TROUBLESHOOTING IMPORTANT Move the machine to the waste disposal area, clean the i INFORMATION Important information December 17, 2020...
  • Page 57 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE E1 TROUBLESHOOTING If charge is low, recharge the battery. If it is spent or does not charge, replace it. Make certain that the battery of the machine is In versions with on-board battery charger, go to point charged (12 V ±...
  • Page 58 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE If they do not operate, see points F1.1.4 and F1.1.5. Check whether or not brushes operate when If they operate, go to step 2 and 3. If necessary, adjust the centre brush. Check the centre brush for proper adjustment. If it properly adjusted, go to point 4.
  • Page 59 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE If the fuse is blown, replace it. Check fuse F1 (30A) If the fuse is good, go to point 2. Replace belt if degraded. Check the drive belt. If belt is intact, go to step 3. If the motor does not run, go to point 4.
  • Page 60 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE If the fuse is blown, replace it. Check F4 fuse (15A) If the fuse is good, go to point 2. If the motor does not run, replace it. them with additional wire, then connect the positive to the battery “+”...
  • Page 61 PLDC04364 REVISION December 16, 2020 TECHNICAL OFFICE EDITION No. DATE Edition 00 Completion of drafting and correction December 16, 2020 Edition 01 December 17, 2020...

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