Diesel generator sets can be divided into two types according to their usage conditions: one is based on mains electricity and the generator set is back-up power equipment, and the other is based on generators as the main power supply equipment. There is a big difference in the usage time of the generators in the two cases. The maintenance of diesel generators is generally determined by the accumulated hours of starting up. The above-mentioned power supply method only tests for a few hours per month, such as accumulated to two or three technical maintenance. It takes too long to perform technical maintenance after hours. Therefore, it should be flexibly grasped according to the specific situation and timely technical maintenance can eliminate the bad phenomena of the machine as soon as possible, ensure that the unit is in good condition, and extend the service life of the machine. Therefore, To make the diesel engine work normally and reliably, implement the technical maintenance system of the diesel engine. The technical maintenance categories are divided into:
One, one maintenance inspection (daily or weekly)
Second and second level maintenance inspection (every 250 hours or one month)
Three and three level maintenance inspection (every 1500 hours or half a year)
Note: 1. Three-level maintenance, "medium repair maintenance", and "overhaul maintenance" should be completed by diesel generator distributors or dealers.
2. The standby generator should regularly start the diesel generator set to run for about 30 minutes to evaporate the moisture in the diesel engine body to achieve moisture-proof and anti-corrosion effects.
(one), one maintenance inspection
<一> Check the oil level
Use the oil dipstick of the diesel engine to check the oil level. In order to get a reading, the oil level should be shut down for 15 minutes and checked when the oil flows back to the oil pan. The oil level should be matched with the original oil pan. Keep the oil level as close as possible to the high "H" mark.
Warning: Never operate the diesel engine when the oil mark is lower than the low mark "L" or higher than the high mark "H" (if necessary, add oil of the same quality and brand in the diesel engine).
<2> Check the cooling system
 Keep the cooling liquid filled up to the working surface, check the cooling liquid level every day or before starting each time, analyze the reason of the cooling liquid consumption, and check the cooling liquid level, only after the cooling system cools down.
<3> Check the connections of the intake pipe
Check each connection of the intake pipe, whether the clamp is loose, whether the hose is cracked, perforated or worn, whether there is any hose break or other damage, tighten the clamp or replace parts as necessary to ensure that the intake system is well sealed, and ensure that all The air passes through the air filter.
<4> Visual inspection
Check whether there is outside air leakage, coolant or oil leakage. Tighten screw connections, joints, etc. or replace gaskets as needed. Check the oil pipe caps of the oil dipstick to see if they are tightly tightened.
<5> Check the damage
 Inspect the fuel system, etc., including erroneous investigations or bumps of the fuel pump, and check all connections for leakage or damage.
<6> Check the drive belt
Check whether the fan, water pump, charger belt is damaged or loose. If the buckle is damaged, replace it with a new one. And adjust the tightness, if necessary, ask a professional technician to adjust.
<7> Matters needing attention during maintenance
1. The lubricating oil pressure is low.
2, insufficient power.
3. The coolant or oil temperature is too high.
4. Coolant, oil and fuel consumption are excessive.
5. The engine sound is abnormal, the smoke color is abnormal, and the smoke exhaust pipe is red.