Massey Ferguson 00.00.30 – Dash (Instrument Panel): Issue With Alternator Charging (Dash)

This code indicates that the alternator is not outputting the correct voltage to charge the battery and power the tractor's electrical systems. According to Massey Ferguson diagnostic logic, if the indicator light is flashing while engine speed is greater than 1000 RPM, one of the alternators (on dual-alternator setups) is not working. If the light is permanently on above 1000 RPM, neither alternator is working.

• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• Tier 4 (2015-2021)
• 4700 series
• 5700 series
• 6700 series
• 8700 series

1. 1

   Check the alternator drive belt for condition and tension. A slack, slipping, or damaged belt is a primary cause of charging issues.

2. 2

   Inspect the load circuit and wiring routing back to the battery for damaged harnesses, chafing, or moisture intrusion.

3. 3

   Check ground connections and straps for corrosion, which can create unstable voltage.

4. 4

   Test the battery to ensure it is not faulty or suffering from a dead cell.

5. 5

   Test alternator output with a multimeter while the tractor is running (should be 13.8V - 14.2V).

1. 1

   Safety First

   Turn off the tractor, remove the key, and disconnect the negative battery cable to prevent electrical shorts.

2. 2

   Belt Adjustment/Replacement

   If the diagnostic checks revealed a loose or damaged belt, loosen the alternator mounting bolts, replace the belt if necessary, and apply proper tension before retightening the bolts.

3. 3

   Wiring Repair

   Clean any corroded battery terminals or alternator connections with electrical contact cleaner. Tighten any loose connections.

4. 4

   Alternator Replacement

   Disconnect the electrical connectors from the rear of the alternator. Loosen the tensioner and remove the drive belt from the alternator pulley. Remove the mounting bolts and extract the faulty alternator. Install the new OEM alternator and secure the mounting bolts. Reinstall the drive belt and set it to the correct tension. Reconnect the electrical connections to the alternator.

5. 5

   Reassembly and Testing

   Reconnect the negative battery cable. Start the tractor and raise the engine speed above 1000 RPM. Verify that the Dash charging warning light turns off and use a multimeter to confirm the charging voltage is back in the 13.8V - 14.2V range.