LTC Repair Lombardini Engine Troubleshooting - Wacker Neuson
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LTC Repair Lombardini Engine Troubleshooting - Wacker Neuson

LTC Repair Lombardini Engine Troubleshooting - Wacker Neuson LTC Repair Lombardini Engine Troubleshooting - Wacker Neuson

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Electrical Troubleshooting Procedures LTC Repair 6.12 Checking the Excitation Capacitor See Graphic: wc_gr003520 WARNING Electric shock hazard. Only qualified personnel should conduct this test. The excitation capacitor (a) is mounted inside the control panel. To check the excitation capacitor, carry out the following procedure: 6.12.1 Turn off the lights and shut down the machine. 6.12.2 Remove the screws that secure the control panel cover to the control box. 6.12.3 Remove the leads from the capacitor and discharge it by placing the blade of an insulated screwdriver across the two spades of the capacitor. 6.12.4 Using a multimeter set to the Farad (F) or capacitance (C) scale (200 µF), measure the capacitor’s capacitance. The capacitor should measure 25±1.25 µF on 60Hz machines; 35±1.25 µF on 50Hz machines. If the reading is not within this range, replace the capacitor. If the capacitor measures within the above range, it is OK. An alternative capacitor check is to set the multimeter to the 10,000 Ohm scale when checking the capacitor. Observe the reading. If the reading starts out very low (5.0 Ohms) and continues to climb to an overload or open reading, the capacitor may be OK. Double check by installing the capacitor in a known-to-be-working Light Tower. If the known-to-be-working Light Tower operates correctly, the capacitor is OK. A second alternative check would be to try a known-to-be-working capacitor in the original Light Tower. If the Light Tower still does not produce power, the problem is within the generator. 86

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<strong>LTC</strong> <strong>Repair</strong> Electrical <strong>Troubleshooting</strong><br />

a<br />

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20n<br />

200n<br />

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200<br />

200p F V<br />

µ<br />

µ<br />

µ<br />

2000<br />

µ<br />

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60Hz 50Hz<br />

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