YUCHAI 800kW 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 Mode	Power	*BoreStroke**	ylinder No.	Dimensions	Weight
XSAY30GF	30/37.5	33/41.25	4D24TGO	36	87*103	4	18007501200	920
XSAY40GF	40/50	44/55	YC4D75-D34	50	108*115	4	18007501200	950
XSAY50GF	50/62.5	55/68.75	YC4D9O-D34	60	108*115	4	18007001200	980
XSAY60GF	60/75	66/82.5	YC4D105-D34	70	108*115	4	18007001200	1000
XSAY80GF	80/100	88/110	YC4D140-D30	95	108*115	4	22508001300	1250
XSAY90GF	90/112.5	99/123.75	YC4D155-D30	103	108*115	4	23008001300	1500
XSAY120GF	120/150	132/165	YC4A190-D30	125	108*132	4	23008301300	1600
XSAY150GF	150/187.5	165/206.25	YC6A245-D30	165	108*132	6	24009701500	2100
XSAY200GF	200/250	220/275	YC6MK350-D30	235	123*145	6	310010501750	2750
XSAY250GF	250/312.5	275/343.75	YC6MK420-D30	281	123*145	6	320011501750	3000
XSAY300GF	300/375	330/412.5	YC6K500-D31	335	129*155	6	320012001750	3100
XSAY360GF	360/450	396/495	YC6K570-D30	389	129*165	6	340015001970	3900
XSAY400GF	400/500	440/550	YC6T660-D31	441	145*165	6	350015001970	4000
XSAY500GF	500/625	550/687.5	YC6TD780-D31	520	152*180	6	350015001970	4500
XSAY600GF	600/750	660/825	YC6C1020-D31	680	200*210	6	450018002500	7500
XSAY640GF	640/800	704/880	YC6C1020-D31	680	200*210	6	450018002500	7500
XSAY800GF	800/1000	880/1100	YC6C1320-D31	88o	200*210	6	480019002500	7500
XSAY1000GF	1000/1250	1100/1375	YC12VC1680-D31	1120	200*210	12	500020002500	9800
XSAY1200GF	1200/1500	1320/1650	YC12VC2070-D31	1380	200*210	12	530020802500	10000
XSAY1320GF	1320/1650	1452/1815	YC12VC2270-D31	1520	200*210	12	550021802550	11000
XSAY1500GF	1500/1875	1650/2062.5	YC12VC2510-D31	1680	200*210	12	560022802600	12000
XSAY1800GF	1800/2250	1980/2475	YC16VC3000-D31	2005	200*210	16	720026002800	17000
XSAY2000GF	2000/2500	2200/2750	YC16VC3300-D31	2205	200*210	16	720026002800	17500
XSAY2200GF	2200/2750	2420/3025	YC16VC3600-D31	2405	200*210	16	720026002800	18000

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