SHANGCHAI 300kW Diesel generator sets_Shandong Xujiujiu Power Technology Co., Ltd.

Reasons and solution of generator

 Time of issue: : 2021-12--07

The generator is difficult to start. There are dozens of reasons for generator start failure. The following will introduce the reasons that cause the generator to be unable to start or difficult to start。 White smoke from the exhaust pipe when starting Analysis of causes （1）Problems with the ventilation system,wrong valve clearance, valve seal deterioration, the air filter is seriously blocked, forget to pull the decompression handle back （2）Problems with oil supply system, poor diesel quality, water in diesel tank; air in oil road, low pressure oil road blocked, inlet throttle filter blocked, too dirty filter element, tank cover vent blocked, resulting in insufficient oil supply; oil supply time is early or too late. （3）Problems with engine body: cylinder head crack, cylinder pad is installed or burned at the end, causing water directly into the cylinder, such as cylinder, piston and piston ring gap, serious wear or stuck, engine starting device, such as low starting speed,low temperature or low engine temperature ,especially in winter. 2. Find and troubleshoot Generally, first check whether there is air or blockage in the low-pressure oil circuit, check the fuel delivery pump, and then check the high-pressure oil circuit and fuel injection pump. If there is no problem with the above inspection results, then check the fuel injector, ventilation system, crank and connecting rod mechanism, and engine block in turn. Wait. （1）If it is in winter or the starting temperature is particularly low, you can try to heat water into the water tank, or drain the oil from the oil pan, and then pour it back after heating. （2）If it is difficult to start. First, check whether the air filter, fuel filter, and diesel filter are too dirty, and then check the matching clearances, such as the clearances of cylinders, pistons and piston rings, and valve clearances, and then check the fuel injectors and fuel injection pumps. 3.Black smoke rises from the exhaust pipe when startup When the fuel and air mixture burns incompletely and the diesel fuel in the mixture is too rich, the unburned mixture is discharged as black smoke. analysis of causes Problems with the ventilation system: the air filter is blocked, which reduces the air entering the cylinder, and the mixed gas is thick; the valve gap is incorrect, resulting in insufficient intake and unclean exhaust,insufficient spring force of the valve spring or spring break, causing the valve to lea,There is carbon deposit and ablation between the valve and the valve seat, causing the valve to leak. Problems with the fuel supply system: one or more fuel injectors have serious carbon deposits, and the needle valves of the fuel injectors are stuck, resulting in oil dripping or poor atomization quality,insufficient fuel injection pressure, poor diesel atomization quality, and fuel supply ahead of schedule The angle is wrong,the fuel injection pump sprays too much, the quality of diesel is not good. The crank connecting rod mechanism has problems: if the clearance between the cylinder, the piston and the piston ring is too large or the wear is serious, the cylinder pressure is insufficient, and the combustion is incomplete. Find and troubleshoot The fault can be solved by referring to the above method of finding and excluding white smoke.Special attention should be paid to the cylinder-by-cylinder inspection method. Smokeless exhaust pipe when starting analysis of causes Problems with the oil supply system: the oil road is blocked, the oil transmission pump is not working normally, and the oil injection pump is not working normally. 6.Find and troubleshoot （1）If the diesel engine start speed is normal but not fire, or the exhaust pipe is smoke-free, it is a failure of the engine oil supply system.Generally, first check whether the oil road is blocked, check the specific method of the oil road blockage, see the above. （2）If there is occasional intermittent smoke coming out when starting, it means that some cylinders have diesel oil in, and some do not. In this case, the "cut-off method" can be used, that is, to stop the fuel supply of each cylinder and find out that it is not working. Of the cylinder.

Gensets Model	Power		Engine				Dimensions	Weight
Gensets Model	Rated Power	Standby Power	Engines Model	Power	*BoreStroke**	ylinden No.	Dimensions	Weight
XSAS50GF	50/62.5	55/68.75	SC4H95D2	68	105*124		23008501350	1350
XSAS80GF	80/100	88/110	SC4H115D2	86	105*124	4	27009001650	2100
XSAS100GF	100/125	110/137.5	SC4H160D2	116	105*124	4	27009001650	2150
XSAS120GF	120/150	132/165	SC4H180D2	132	105*124	4	27009001650	2050
XSAS150GF	150/187.5	165/206.25	SC7H230D2	170	105*124	6	28009001750	2300
XSAS200GF	200/250	220/275	SC9D310D2	228	114*144	6	286011001760	2700
XSAS250GF	250/312.5	275/343.75	SC13G420D2	308	135*150	6	286011401760	3000
XSAS300GF	300/375	330/412.5	SC12E460D2	338	128*153	6	314013601960	3000
XSAS360GF	360/450	396/495	SC15G50OD2	373	135*150	8	340014001850	3500
XSAS400GF	400/500	440/550	SC25G610D2	445	135*155	12	342016001900	3650
XSAS500GF	500/625	550/687.5	SC27G755D2	555	135*155	12	351016501960	4000
XSAS600GF	600/750	660/825	SC33W990D2	726	180*215	6	351016501960	5000
XSAS800GF	800/1000	880/1100	SC33W1150D2	860	180*215	8	360017002050	5200

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