Perfect witness: Road engine generator stents (imported)
The road generator is an internationally famous brand, but a good brand of accessories may also be a problem. Therefore, the usual maintenance is inevitable, if the problem is encountered, of course, the reserve team is not enough. The following is an example of the fault of the sequence generator.
Perfect witness: Road engine generator stents (imported)
A new Deutz Diesel generator set in the first put into use, the fault phenomenon cannot be started. The starter can drive the diesel engine, but the diesel engine is not on fire.
Fault diagnosis: because it is a brand-new machine, at the beginning, the maintenance personnel only carried out a comprehensive check on the low pressure oil system of the machine, and no problems were found in the exhaust system of the fuel system and the inspection of diesel filter element, but the machine still could not start.
When the starter drags the diesel engine to rotate, the maintenance personnel find that the high-pressure oil pipe has no pulse motion. It is suspected that the high-pressure oil pump does not supply oil. After removing the high-pressure oil pipe, it is found that the 6 outlets have no oil spillage. Then the high-pressure oil pump is removed for professional treatment.
The inspection found that the high pressure oil pump, 6 piston pump all the death card can not pump oil, remove the piston check, found that 6 were dead and can pull the plunger, and can not be repaired.
Therefore, the replacement of 6 plunger and oil outlet valve, according to the requirements of the commissioning of the oil pump, but the machine is still unable to start. At this point, you can feel the pressure of the high pressure oil pipe, which proves that the high pressure oil pump is normal. In combination with the phenomenon of the death of the plunger, it is doubted that the injector pin valve pairs (injector) may have the same problem.
After that, a fuel injector is removed to connect it to the high pressure oil pipe, and the diesel engine is dragged by starter. The fuel injector is spout without dropping oil. It indicates that there is a problem in the injector coupling. The demolition of 6 injector professional testing, results showed that all injection only drops (leakage) oil, that needle valve injector is stuck phenomenon. When all the injectors were dismantled, all the needle valves and needle valve bodies were stuck, and they could not be pulled out by hand. After the use of the tool to pull out the needle valve check, all the needle valves have different degrees of pull.
Troubleshooting: replacement of 6 injector pin valve pairs (injection nozzle), commissioning qualified post installation, the diesel engine is starting successfully and running normally.
Fault analysis: the diesel generator set is a new machine. Why do you have a second fault? After inquiring the related personnel and analyzing the failure phenomenon, it is believed that although the unit is a new machine, it has been stored for one year in the warehouse. The problem should be that there is no antirust sealing treatment or use of clean diesel oil when the machine is out of the factory, which leads to the death of the precision even parts of the oil supply system.
This failure indicates that for a long term parked diesel engine, rust prevention treatment and use of special antirust fuel to run diesel engines must be carried out before the shutdown.
You see, engineering machinery parts are often used, wear fast, life will be shorter, not often use it, may also have unexpected problems. Therefore, the usual maintenance is not good.
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