75kW Marine generator set_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 Mode	Power		Engine				Dimensions	Weight
Gensets Mode	Rated Power	Standby Power	Engines Model	Power	*BoreStroke**	ylinder No.	Dimensions	Weight
CCFJ20J-WJ	20/25	22/27.5	WP3.9CD33E1	33	102*118	4	13147001165	480
CCFJ24J-WJ	24/30	26.4/33	WP3.9CD33E1	33	102*119	4	13147001165	490
CCFJ30J-WJ	30/37.5	33/41.25	WP4.3CD38E1	38	105*125	4	13147001165	500
CCFJ40J-WJ	40/50	44/55	WP4CD66E200	60	105*130	4	17508001237	1000
CCFJ50J-WJ	50/62.5	55/68.75	WP4CD66E200	6o	105*130	4	17508001237	1050
CCFJ64J-WJ	64/80	70.4/88	WP4CD10OE200	9o	105*130	4	18008001237	1100
CCFJ75J-WJ	75/93.75	82.5/103.125	WP4CD100E200	9o	105*130	4	18008001237	1200
CCFJ90J-WJ	90/112.5	99/12375	WPBCD132E200	120	105*130	6	22128201336	1390
CCFJ100J-WJ	100/125	110/137.5	WPBCD132E200	120	105*130	6	22128201336	1430
CCFJ120J-WJ	120/150	132/165	WPBCD152E200	138	105*130	6	22508201336	1450
CCFJ150J-WJ	150/187.5	165/206.25	WP10CD200E200	182	126*130	6	254010001572	1950
CCFJ180J-WJ	180/225	198/247.5	WP10CD238E200	216	126*130	6	254010001572	2000
CCFJ200J-WJ	200/250	220/275	WP10CD264E200	240	126*130	6	254010001572	2050
CCFJ250J-WJ	250/312.5	275/343.75	WP12CD317E200	288	126*155	6	254010001630	2500
CCFJ300J-WJ	300/375	330/412.5	WP13CD385E200	350	127*165	6	2445$1000*1533	2700
CCFJ400J-WJ	400/500	440/550	8170ZC	441	170*200	6	390011862030	8200
CCFJ500J-WJ	500/625	550/687.5	CW6200ZD	600	200*270	6	460018002450	12000
CCFJ600J-WJ	600/750	660/825	XCW6200ZD-1	720	200*270	6	460018002450	12000
CCFJ700J-WJ	700/875	770/962,5	CW8200ZD	800	200*270	8	530020002500	14000
CCFJ800J-WJ	800/1000	880/1100	CXW8200ZD-10	960	200*270	8	530020002500	14000
CCFJ900J-WJ	900/1125	990/1237.5	CW12V200ZD-2	1080	200*270	12	530020002500	14000
CCFJ1000J-WJ	1000/1250	1100/1375	CW12V200ZD	1200	200*270	12	530020002500	14000

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