If the diesel engine or gasoline engine is out of service for a few days and the motor does not start, the following points may be followed for detection and elimination:
1、 Fault phenomenon: the driving gear of starting motor can't be meshed
Cause of failure:
1. Starter motor relay does not work
① The start button is damaged or in poor contact.
② The change-over switch contacts are burnt out.
③ Insufficient voltage (battery power shortage, poor contact or leakage of circuit system).
terms of settlement:
① Repair or replace the start button.
② Disassemble and clean the contacts.
③ Check the electrical circuit and battery.
2. The driving gear of starting motor cannot mesh with the flywheel ring gear of diesel engine.
① One side of the gear is worn heavily or roughened.
② The starting motor gear is not parallel to the center line of flywheel ring gear.
③ The clearance between the end face of starting motor gear and the end face of flywheel ring gear is too large or jacked.
④ The lever of starting motor is uncoupled.
terms of settlement:
① Repair the gear.
② Re install to eliminate non parallelism.
③ The clearance should be in the range of (2.5 ~ 5) mm. If not required, the clearance should be adjusted by increasing or decreasing the gasket.
④ Re install and adjust.
⑤ Disassemble the starting motor for maintenance.
⑥ Disassemble and reassemble.
3. Start the motor into engagement, but the diesel engine cannot rotate or cannot rotate
① Insufficient voltage (poor circuit contact, leakage or insufficient battery).
② Clutch friction plate slipping.
③ The starter motor commutator is stained with oil or ablated, the brush is worn, and the brush spring pressure is insufficient.
④ Start the diesel generator motor armature and field coil collision or short circuit.
terms of settlement:
① Check the electrical circuit and battery.
② A washer is added between the inner pressure ring and the friction plate of the clutch for adjustment.
③ Clean the commutator of starting motor with sandpaper. If the commutator is seriously worn and ablated, it needs to be repaired.
④ Remove and repair.
4. The diesel engine has been started, but the starting gear can not be separated, making a sharp noise
① The copper contact plate and two contacts in the starting motor relay are adhered.
② Starting the change-over switch, the large and small copper contact plates are adhered with the contacts.
③ The lever of starting motor is unhooked or the eccentric screw is loose.
④ The lever return spring breaks or loses its elasticity.
terms of settlement:
① Check the electrical circuit and repair the contact.
② Open and check and repair the contacts.
③ Readjust and tighten.
④ Replace the spring.
⑤ Replace the starting motor.
5. Battery power shortage
① The liquid level is too low.
② There is a short circuit between the plates.
③ The plates are sulfated.
④ The power supply of charging generator is insufficient.
⑤ Poor contact of connecting wire.
terms of settlement:
① Add distilled water or dilute sulfuric acid solution with specific gravity of 1.1.
② Remove the sediment and replace the electro-hydraulic system.
③ Repeated charging and discharging can eliminate sulfation.
④ Repair the relay regulator and belt tightness.
⑤ Check the connecting wire to make it in good contact.
6. Battery temperature too high
① There is a short circuit inside the battery.
② The charging current is too high.
terms of settlement:
① Eliminate the short circuit.
② Repair the relay regulator.
7. The battery shell is deformed and the seal is broken
① The charging current is too high.
② The external circuit is short circuited.
terms of settlement:
① Repair the relay regulator.
② Eliminate the short circuit.
8. The electro-hydraulic system is not clean
The electrohydraulic fluid is turbid with impurities.
