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Causes Of Difficulty In Starting Diesel Generator

Jan. 11, 2022

Insufficient starting speed of 200-kilowatt diesel generator sets, insufficient compression pressure, insufficient fuel injected into the cylinder of the diesel engine, advance or delay of fuel injection timing, etc., will cause the unit to fail to start or start difficult. This article analyzes the causes of abnormal start-up of diesel generators by Jiangsu Starlight Electricity Equipments Co.,Ltd., a professional manufacturer of diesel generators.


Reason1: Starting or starting speed is not enough (starting speed 150-190 minutes)

1. The battery cable is corroded or the cable is too long, resulting in high resistance and low current.

2. The 200-kilowatt diesel generator set is a backup power source, and some even start once a year or longer. But when it needs to be used, the generator set must be started reliably, and there is a requirement for the storage time of the battery. If the battery power is insufficient, it indicates that the specific gravity of the battery does not meet the requirements, there is voltage without electricity, and the voltage drop is too large. 

3. The starter itself has defects.

4. The resistance of the insulated or grounded circuit is too large.

5. The lubricating oil is too thick to meet the requirements of use.

6. The solenoid valve itself is faulty and the oil circuit cannot be opened, but the solenoid valve can be temporarily opened by hand.

7. The disconnection of the oil pressure and water temperature alarm lines may cause accidental stop or make the equipment unable to start, but the solenoid valve on the top of the hand can make the machine start without stopping.

8. The shaft of the PT pump gear is broken (because there is no oil at the outlet of the solenoid valve). 

9. Part of the 200-kilowatt diesel generator set has broken wires or high fire risk, and the control circuit has no electricity. 

10. Hydraulic lock diesel or water into the cylinder and start the car without moving.


The 200-kilowatt diesel generator set

Reason2: Insufficient pressure of 200-kilowatt diesel generator set

1. The cylinder liner and piston ring are worn out (requires overhaul).

2. The intake valve is worn or the valve clearance is too large. 

This is because:

1. The fuel filter is clogged.

2. Insufficient fuel injection in the diesel engine cylinder. 

3. The spraying time is early or too late.

4. Oil circuit ventilation.


Jiangsu Starlight Electricity Equipments Co.,Ltd. is a professional manufacturer of diesel generator sets, and is also an OEM supporting manufacturer of Chinese diesel generator sets authorized by Cummins, Volvo (VOLVL) and Yuchai. Our company was founded in 1974 and has 64 sales and service departments across the country, providing users with long-term technical consultation, free debugging, free maintenance, and free training services. For more details, please contact us with sales@dieselgeneratortech.com

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