LTC Repair Lombardini Engine Troubleshooting - Wacker Neuson

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Electrical Troubleshooting Procedures LTC Repair 6.10 Checking the Stator Windings See Graphic: wc_gr003518 WARNING Electric shock hazard. Only qualified personnel should conduct this test. The stator consists of three separate windings. Two of the windings are tapped for power. The third provides excitation to the rotor. This third winding is known as the excitation winding. To check the stator windings, carry out the following procedure: 6.10.1 Turn off the lights and shut down the machine. 6.10.2 Remove the screws that secure the control panel cover to the control box. Remove the control panel cover and place it securely on the fender of the trailer. So it will not fall when the engine is started. 6.10.3 Disconnect the wires labelled “1”, “2”, “3”, and “4” from the short terminal strip (a). These are the stator winding leads. 6.10.4 Using the Ohms scale on a multimeter, measure the resistance across wires labelled “1” and “2”. Also measure the resistance across wires labelled “3” and “4”. There should be 0.4±0.2 Ohms measured across each pair. If 0.4±0.2 Ohms is not measured, the winding has failed; replace the stator. If 0.4±0.2 Ohms is measured, continue. 6.10.5 Measure the resistance (continuity) between each winding lead (wire) and a common ground. If resistance (continuity) to ground exists, the winding has failed; replace the stator. If there is no continuity (resistance) to ground, the winding is OK. 6.10.6 Measure the resistance (continuity) across wires labelled “2” and “3”. If resistance (continuity) exists, the winding has failed; replace the stator. If there is no continuity (resistance) to ground, the stator windings are OK. 82
LTC Repair Electrical Troubleshooting a F V 20M 2M 200k 20k 2k 200 V- COM A 83 F V 20M 2M 200k 20k 2k 200 V- COM A wc_gr003518
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www.wackergroup.com REPAIR MANUAL 0
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Foreword LTC Repair WARNING 4 CALIF
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Table of Contents LTC Repair 4.4 Pr
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Table of Contents LTC Repair 7.12 R
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Safety Information LTC Repair 1.2 O
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Safety Information LTC Repair 1.4 T
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Safety Information LTC Repair 1.6 L
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Safety Information LTC Repair 1.7 S
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Safety Information LTC Repair Ref.
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Safety Information LTC Repair Ref.
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Technical Data LTC 4L 2. Technical
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Technical Data LTC 4L 2.2 Generator
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Technical Data LTC 4L 26
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Operation LTC 4L 3.3 Leveling Trail
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Operation LTC 4L 3.6 Raising Tower
Page 32 and 33: Operation LTC 4L 3.7 Lowering Tower
Page 34 and 35: Operation LTC 4L 3.8 Control Panels
Page 36 and 37: Operation LTC 4L 3.10 Starting See
Page 38 and 39: Maintenance LTC Repair 4. Maintenan
Page 40 and 41: Maintenance LTC Repair 4.3 Installi
Page 42 and 43: Maintenance LTC Repair 4.5 Replacin
Page 44 and 45: Maintenance LTC Repair 44 4.8 Lomba
Page 46 and 47: Maintenance LTC Repair 4.10 Engine
Page 48 and 49: Maintenance LTC Repair 4.12 Wiring
Page 54 and 55: Maintenance LTC Repair 4.18 Generat
Page 56 and 57: Lombardini Engine Troubleshooting L
Page 72 and 73: Electrical Troubleshooting Procedur
Page 124 and 125: Disassembly/Assembly Procedures LTC
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Disassembly/Assembly Procedures LTC
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Threadlockers and Sealants Threadlo
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Torque Values Torque Values (contin
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LTC Repair Lombardini Engine Troubleshooting - Wacker Neuson

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