Residual Magnetism - Restore
Show/hide table
 | |
| Illustration 1 | g01066183 |
Restoring the Residual Magnetism (16) Jumper Wire | |
Reduced residual magnetism results in charging problems during start-up. Follow the procedure below in order to restore the residual magnetism of the alternator.
- Connect the positive terminal of a 24 volt battery to the "B+" terminal of the alternator.
- Connect the negative terminal of a 24 volt battery to the "B-" terminal of the alternator.
- Connect one end of jumper wire (16) to the "B+" terminal.
- Connect the other end of the jumper wire (16) to the "R" terminal. A spark occurs as the jumper wire touches the "R" terminal. If a spark does not occur, the alternator has an internal open.
- Wait for two seconds.
- Disconnect the jumper wire from the "R" terminal.
Expected Result: The residual magnetism is restored.
Alternator Residual Magnetism Loss
The residual magnetism is reduced by the following conditions:
- Dropping the alternator
- Handling the alternator roughly
- Storing the alternator at temperatures above 38 °C (100 °F)
- Storing the alternator for longer than 3 to 6 months
- Disassembling the alternator for repairs or for testing
- Having an alternator with poor manufacturing tolerances
Caterpillar Information System:
3406E, C-10 and C-12 On-highway Engines 0254-12 ECM Fault (53)
C7 and C9 On-Highway Engines Timer Parameters
C-10 Petroleum Engine Engine Crankcase Breather - Clean
C7 Marine Engine Engine Design
3406E, C-10 and C-12 On-highway Engines 0253-11 Check Transmission Customer Parameters (56)
3406E, C-10 and C-12 On-highway Engines 0232-04 5 Volt Supply voltage low (21)
3508B, 3512B, and 3516B High Displacement Generator Sets Product Storage
3406E, C-10 and C-12 On-highway Engines 0232-03 5 Volt Supply voltage high (21)
SCJ and 8SC Series Alternators Regulator - Test
C7 Marine Engine Fuel System
3512B and 3516B High Displacement Locomotive Engines Product Lifting
SCJ and 8SC Series Alternators Diode Assembly - Test
SCJ and 8SC Series Alternators Brush Assembly - Test
SCJ and 8SC Series Alternators Brush Length - Check
C11 and C13 Engines Cylinder Head Valves
C-10 Petroleum Engine Engine Oil Level - Check
3406E and 3456 Generator Set Engines System Configuration Parameters
C7 Marine Engine Turbocharger - Inspect
3406E and 3456 Generator Set Engines Engine Will Not Crank
3500B Locomotive Engines Engine Mounts - Check
C7 Marine Engine Crankcase Breather
Product Link PL-102C{7602} Product Link PL-102C{7602}
C7 Marine Engine Aftercooler
Requirements for Installation of the 197-6700 Piston {1214, 1216} Requirements for Installation of the 197-6700 Piston {1214, 1216}