Analysis of the reasons why the diesel generator motor cannot start

1. Fault phenomenon: The starter motor transmission gear cannot enter mesh. Reasons for the fault: 1. The starter motor relay does not work. ① The start button is damaged or has poor contact. ②The transfer switch contacts are burned out. ③Insufficient voltage (the battery is short of power, the circuit system has poor contact or leakage). Solution: ①Repair or replace the start button. ② Disassemble and clean the contacts. ③Check the electrical circuit and battery. 2. The starter motor transmission gear and the diesel engine flywheel ring gear cannot mesh. ① One side of the gear is heavily worn or brittle. ②The center lines of the starter motor gear and the flywheel ring gear are not parallel. ③The gap between the end face of the starter motor gear and the end face of the flywheel ring gear is too large or stuck. ④The lever that starts the motor is decoupled. Solution: ①Inspect the gear. ② Reinstall, no parallelism occurs. ③The gap should be within the range of (2.5~5) mm. If it is not required, adjust it by adding or removing gaskets. ④Reinstall and adjust. ⑤ Disassemble the starter motor for inspection. ⑥Disassemble and reassemble. 3. The starting motor is engaged but the diesel engine cannot rotate or rotates weakly ① Insufficient voltage (poor circuit contact, leakage or insufficient battery power). ②The clutch friction plate is slipping. ③ The commutator of the starter motor is stained with oil or corroded, the brushes are worn, and the brush spring pressure is insufficient. ④The armature of the starting diesel generator motor collides with the magnetic field coil or is short-circuited. Solution: ① Check the electrical circuit and battery. ②Add a washer between the clutch inner pressure ring and the friction plate to adjust it. ③ Use sandpaper to clean the commutator of the starter motor. If it is severely worn and ablated, it needs to be repaired. ④Disassembly and repair. 4. The diesel engine has been started, but the starting gear cannot be separated and makes a sharp noise. ① The copper contact plate and two contacts in the starting motor relay are adhered. ②The large and small copper contact plates of the start-up transfer switch are adhered to the contacts. ③The starter motor lever is decoupled or the eccentric screw is loose. ④The lever return spring is broken or loses its elasticity. Solution: ① Check the electrical circuit and trim the contacts. ② Disassemble, inspect and repair contacts. ③Re-adjust and tighten. ④Replace the spring. ⑤Replace the starter motor. 5. The battery power is insufficient ① The electrohydraulic level is too low. ② There is a short circuit between the plates. ③The plate is sulfated. ④The charging generator has insufficient power supply. ⑤The connecting wire has poor contact. Solution: ①Add distilled water or dilute sulfuric acid solution with a specific gravity of 1.1. ② If there is sediment, replace the electrohydraulic. ③ Repeated charge and discharge sulfation. ④Check the relay regulator and belt tightness. ⑤ Check the connecting wire to make sure it is in good contact. 6. The battery temperature is too high ① There is a short circuit inside the battery. ②The charging current is too large. Solution: ① Short circuit object. ②Inspect the relay regulator. 7. The battery shell is deformed and the seal is broken. ① The charging current is too large. ②The external circuit is short-circuited. Solution: ①Inspect the relay regulator. ②Short circuit. 8. The electro-hydraulic is not clean. The electro-fluid is turbid and contains impurities.