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The lubrication system
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The most common type of lubrication is the combination of the force feed method and splash lubrication. The lubrication system consists of the oil pump, oil collector, oil filter, oil pipe-lines, oil radiator, oil crankcase, oil pressure-gauge and oil funnel.
When the lubrication system is faulty, the engine operation must be stopped at once.
The oil radiator is used in the lubrication system for oil cooling. It must work there when the air temperature is about 20°C. But regardless of the temperature the radiator must be put into operation if the engine operates with high load in difficult conditions.
The oil crankcase is steel; it forms the bottom of the cylinder block. It keeps the oil. When repairing the crankcase it is necessary to mind that the left front pin screwed into the top of the distributive gears is a special one; it is screwed at small depth in order not to jam the gear of the camshaft. The flange of the crankcase is compressed by the cork gaskets.
The oil collector is attached to the top of the oil pump and consists of the body and filtering screen.
The gear type oil pump with reduction valve is installed inside the oil crankcase. It is fixed to the top of the 4th main bearing by 2 bolts.
The oil filter is installed on the cylinder block from the right side of the engine. It has 2 valves. When the filter gets dirty, one of the valves opens and lets the unlearned oil leak into the lubrication system. When installing the filter on the engine it is necessary to make sure that the gasket is in working order and to lubricate it with oil.
One should check the level of oil in 2-3 minutes after stopping the warmed engine. One must pour the waste oil off the crankcase immediately after driving till it’s hotter. In this case the oil pours off quickly and completely.
The pressure in the lubrication system of a new engine at the speed 60 km/h when gear is direct and oil radiator is switched off must be not less than 343 kPa. The pressure may increase up to 588 kPa when the engine isn’t warmed up and lower up to 294 kPa when the weather is hot. During the process of operation the pressure in the lubrication system will be lowering gradually. When the pressure has lowered up to 118 kPa the engine operation must be stopped at once.
Date: 2015-10-18; view: 437; Нарушение авторских прав