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Technical service manual 

17

UK

(as described in the relative paragraph).

- Disconnect the connector on the search circuit board and the pick up cable on the 

motherboard.

- Unscrew the three fixing screws on the beam and remove the central unit.
- Fit the new central unit. The three fixing screws must be tightened to a torque of 48 Nm.
- Replace the search circuit board complete with support.
- Reconnect the pick up and search board connectors.
- Replace the motor complete with support and adjust the wheel spin device.
- Replace the sensor, reversing the operations carried out to disconnect it.
- Calibrate the sensor as described in the operator’s manual.
- Perform a few wheel spins and check that the wheel spin device is operating correctly.
- Perform sensitivity calibration both in CAR environment (with a car wheel) and in 

TRUCK environment (with a truck wheel).

ADJUSTING THE WHEEL SPIN DEVICE

- Open the weight-holder lid, first undoing the fixing screws.
- Undo the lock-nut (D, fig. 3) which fixes the adjuster washer (A, fig. 3).
- Completely tighten the adjuster check nut (D, fig. 3). This eliminates the preload of 

the spring (B, fig 3).

- Undo the screws which fix the motor support (C, fig. 3) to the beam underneath.
- Position the motor unit so that the drive roller and the pulley are about 4-5 mm apart 

and the axis of the motor is parallel to that of the central unit.

- Tighten the screws which fix the motor support.
- Preload the spring (B, fig. 3), unscrewing the check nut (D, fig. 1); until the gap be-

tween the drive roller and the pulley has been reduced to 2 mm.

- Tighten the lock-nut.
- The wheel spin device has a limit stop screw which dampens the residual oscillations 

of the drive unit at the end of the wheel spin phase.

  Adjust the limit stop as follows:

• position the screw so that it is not touching the leaf spring;
• make sure that the drive unit is in the rest position (drive roller 2 mm from the pul-

ley);

• tighten the screw until it slightly preloads the leaf spring of the motor support;

- Perform a few trial wheel spins and check that the wheel spin device is operating cor-

rectly.

- Close the weight-holder lid again.
- If the screw (E, Fig.3) does not slide freely when activating the cylinder, turn the nut 

(F, Fig.3).

Summary of Contents for MT 2450

Page 1: ...MT 2450 Code 4 131046_uk 12 2013 Technical service manual...

Page 2: ...otice Les droits de traduction de m morisation lectronique de reproduction et d adaptation compl te ou partielle par tout type de moyen y compris microfilms et copies pho tostatiques sont r serv s Les...

Page 3: ...UNIT OF THE MBE BOARD 9 DOWNLOADING THE SOFTWARE AND FIRMWARE FROM THE INTERNET FOR CARD UPDATING 9 UPDATING THE FIRMWARE FOR THE MBE161 CARD 10 INSIDE SENSOR 12 REPLACING AND ADJUSTING THE PICK UPS...

Page 4: ...left hand display and the message Ent flashes on the right hand display to indicate that Enter must be pressed to confirm the selection made press the Enter key to confirm If the preselection is not c...

Page 5: ...he left display when programme 91 is selected When the ENTER key is pressed the diameter measured with the automatic sensor is then displayed with the precision of a tenth of an inch the message oF 5...

Page 6: ...of an encoder one notch corresponds to about 1 4 degrees To exit from the program and the Service environment press the F key The program is used to check that the values of the synchronisation calibr...

Page 7: ...fter which the shaft s current angle appears To exit from the program and the Service environment press the F key The program is used to check the efficiency of the search circuit board When the shaft...

Page 8: ...logue selection of groups EM7xxx or EM8x JEXT1 Set on EM8xxx Jumper for analogue selection of groups EM7xxx or EM8x E2PROM t4 MEMORY ZERO SETTING PROGRAMME Proceed as follows to perform the E2PROM cal...

Page 9: ...el Board description MBE161 card Processing board and interface with completely LED based display The board is controlled by a microprocessor with relative firmware The MBE161 card firmware version ca...

Page 10: ...d UPDATING THE FIRMWARE FOR THE MBE161 CARD To update the firmware the SAB16X programme is necessary If it is not already instal led on the PC to be used for the update it can be downloaded beforehand...

Page 11: ...elect the Start key to start the programming The programme starts by deleting the software version on the card to be updated displaying the following image on the status bar When the Programming box o...

Page 12: ...signals Diameter sensor di Fig 2a Check that the machine reads the number of notches indicated below in the following positions Position 1 with lever fully forwards 0 notches Position 2 with lever fu...

Page 13: ...eads correctly as indicated above Distance sensor d Fig 2b Check that the total travel is 750 notches maximum permissible error 5 notches along entire travel Check the following if the sensor C Fig 2b...

Page 14: ...e the flat cable of sensor C figure 2b ensure that the flat cable is reconnected correctly on the board see fig 2c The flat cable must be fas tened to the base leaving a sufficient length of free cabl...

Page 15: ...ioned values with a precision of a tenth of an inch on the display select OFF for rounding to the nearest inch of the diameter values read by the automatic sensor display as described in chapter 91 Th...

Page 16: ...ls E from 110 to 170 If the values displayed at the end of the wheel spin are not within the specified ranges adjust the dowels to regulate the tightness of the pick ups until the conditions are met T...

Page 17: ...r washer A fig 3 Completely tighten the adjuster check nut D fig 3 This eliminates the preload of the spring B fig 3 Undo the screws which fix the motor support C fig 3 to the beam underneath Position...

Page 18: ...ort assembly Check the state of the drive roller and reuse it on the new motor only if it is in perfect condition Remove the roller by undoing the screw on the top Apply medium thread glue to the lock...

Page 19: ...pulley D fig 4 unscrewing the two fixing dowels E fig 4 Remove the brake shoes A fig 4 Fit the new shoes Apply medium thread glue to the locking dowels and replace the pulley Turn the shaft by hand an...

Page 20: ...transformer and on the power supply circuit board have not blown and that the LEDs on the power supply board which indicate that the various power supply voltages are available illuminate The followi...

Page 21: ...control cable connecting the motherboard to the power supply and con trol circuit board is connected and wired correctly that the power supply and control circuit board is operating correctly that the...

Page 22: ...this pro ceed as follows tighten the board s four fixing screws placed close to its edges lightly engage the two nuts close to the keys until they turn with friction press all the keys on the panel t...

Page 23: ...the position of the imbalances correctly In this case the following must be checked that the photodiodes of the search circuit board are not dirty that the mechanical setting of the fork in relation...

Page 24: ...correctly and its connectors are connected correctly that the power supply and PEAC control circuit board is operating correctly that the motherboard power supply cable is wired correctly and its con...

Page 25: ...Technical service manual 25 UK Note...

Page 26: ...up FU Fuse M1 Motor QS1 Master switch RP1 Internal distance potentiometer SQ6 Distance resetting micro switch SQ7 Diameter resetting micro switch BR2 Diameter measuring sensor BR3 Distance measuring...

Page 27: ...Technical service manual 27 UK...

Page 28: ...28 Technical service manual...

Page 29: ...Technical service manual 29 UK Cod 4 101700...

Page 30: ...30 Technical service manual...

Page 31: ...Technical service manual 31 UK...

Page 32: ...32 Technical service manual...

Page 33: ...Technical service manual 33 UK Cod 457674B...

Page 34: ...34 Technical service manual...

Page 35: ...Technical service manual 35 UK Cod 4 104447A...

Page 36: ...MONDOLFO FERRO S p a Viale dell industria 20 61037 MONDOLFO PU Italy info mondolfoferro it www mondolfoferro it CE COMIM Cod 4 131046 12 2013...

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