One, Only know cleaning air filter, ignoring intake short circuit. Some users in the cleaning of the air filter after the loss of the internal pad, or the intake pipe joint sealing pad, no hose ends without pre-treatment of hoop, hose rupture, will cause the air to short circuit, without the filtered air into the machine, exacerbated by the compression system parts wear.

Two, only adjust the valve clearance, ignoring the timing of gas distribution. Most users adjust the valve clearance, only according to the specification value adjustment, ignore the check valve timing is correct, especially the aging machine. As a result of changes in the geometry of the cam wear, resulting in late opening and closing of the valve, resulting in insufficient intake, exhaust, fuel consumption, power down. Therefore, when adjusting the valve clearance of the aging machine, the valve clearance value should be properly reduced to compensate the phase error of the gas distribution and realize the timing of valve timing.

Three, only look at the oil sump oil, ignore its quality. It depends on the quality and quality of the oil, and regular replacement of the oil. Use longer engine oil, containing a large amount of oxidizing material and metal scraps, deterioration of lubrication performance, aggravating wear of parts and components. To do this, always check the oil quality.

Four, only pay attention to the plunger, nozzle quality, ignoring the technical status of the oil valve. After the oil discharge valve is worn out, the residual pressure of the high-pressure oil pipe is too high, the oil dripping at the nozzle and the engine knocking at the cylinder at high speed are unstable at low speed. Therefore, to check and adjust the injection quality if no detector, available methods, is high pressure oil pump outlet air, diesel oil, diesel oil and the nozzle flush, rapid inversion flywheel about half circle, observe no decline for qualified diesel.

Five, only pay attention to the valve, valve seat, good or bad, ignoring the valve spring quality. When the valve leaks, the engine only changes the valve and valve seat, seldom checking its spring tension. In fact, after the weakening of the elastic, the valve closes slowly, and the valve is not tight with the seat and the air leak, resulting in insufficient cylinder pressure, the deterioration of the diesel engine work.

Six, cleaning only oil filter core, ignoring cleaning oil cavity cleaning. The connecting shaft journal of Volvo diesel generator set is usually hollow, and there is oil block at both ends. It is called cleaning chamber. The lubricating oil of the connecting rod tile is attached to the wall of the cavity under the influence of centrifugal force, so as to improve the lubricating quality. In general, 500 hours of work (overhaul), it is necessary to remove the oil plug, cleaning, cleaning cavity and impurities in the oil lane.

Seven, only clear the combustion chamber coke, ignore cleaning the exhaust pipe. Some users for removal of coke exhaust pipe and muffler, carbon accumulation is thick, the exhaust channel cross-sectional area decreases, the exhaust is blocked, the exhaust gas is not clean, new air into the combustion is not sufficient as a result of deterioration of the engine overheating.
The user is in the maintenance of some common negligence, maintenance is to adjust the abnormal situation of field construction of special diesel generators exist, the unit reverted to a good condition for use, maintenance and improper operation may aggravate the unit "condition", the starting point to the contrary, therefore. We hope to be able to master the correct method of maintenance.