Combined diesel lubrication system
Oil pump - gear type, single section
Привод масляного насоса осуществляется от шестерни, установленной на коленчатом валу.
The oil pump is driven by a gear mounted on the crankshaft.
The oil pump 9 takes oil from the oil sump 1 through the oil receiver 8 and feeds it through the channels in the cylinder block and the channels of the oil filter housing to the liquid-oil heat exchanger 10, and then to the full-flow oil filter 12 and to the diesel oil line.
From the main line of the diesel engine, through the channels in the cylinder block, oil flows to all the main bearings of the crankshaft and camshaft journals.
From the main bearings, oil flows through channels in the crankshaft to all connecting rod bearings.
From the first main bearing, oil flows through special channels to the bushings of the intermediate gear and the drive gear of the fuel pump, as well as to the fuel pump.
The parts of the valve mechanism are lubricated with oil coming from the rear bearing of the camshaft through the channels in the block, the cylinder head, drilling in the IV pillar of the rocker arms into the inner cavity of the rocker arm axis and through the hole in the rocker arm bushing, from which it goes through the channel to the adjusting screw and the rod.
The oil is supplied to the compressor from the main line through boreholes in the cylinder block and a special oil line. The oil is drained from the compressor into the diesel crankcase.
Oil is supplied to the turbocharger bearing assembly through a pipe connected to the outlet of the oil filter housing. From the bearing assembly of the turbocharger, the oil is discharged through a pipe into the oil sump
Bypass (pressure reducing) valves are installed in the body of the liquid-oil heat exchanger - 11 (response pressure value - 0.15 ... 0.20 MPa) and in the oil filter - 13 (response pressure value 0.13 ... 0.17 MPa ).
When starting a diesel engine on cold oil, when the resistance to the passage of oil in the liquid-oil heat exchanger exceeds the value of 0.15-0.2 MPa, the bypass valve opens, and the oil, bypassing the liquid-oil heat exchanger, enters the oil filter, and with resistance in the oil filter 0.13 ... 0.17 MPa, the oil filter bypass valve opens and oil, bypassing the oil filter, enters the oil line.
The bypass valves are not adjustable.
An adjustable safety valve 14 is built into the filter housing, designed to maintain the oil pressure in the main oil line of 0.25 ... 0.35 MPa. Excess oil is drained through the valve into the diesel crankcase.
In case of excessive clogging, when the resistance of the oil filter becomes higher than 0.13-0.17 MPa, the filter bypass valve also opens, and oil, bypassing the oil filter, enters the oil line.
Attention! When the diesel engine is running, it is strictly forbidden to unscrew the plug of the pressure reducing valve!
Maintenance of the lubrication system consists in daily control of the oil level in the engine crankcase, oil pressure control, timely oil and filter change.
The oil level is checked daily before starting the engine and no earlier than 3 minutes after stopping the engine. The bus must be installed on a level, horizontal platform.
The oil level should be between the lower and upper marks on the dipstick. Do not operate the engine with the oil level below the lower and higher than the upper mark of the oil meter.
The oil pressure of the engine lubrication system is controlled by an indicator located on the instrument panel.
When the diesel engine is operating at the rated speed and the coolant temperature (85-95) ° C, the oil pressure should be at the level of (0.25-0.35) MPa, the pressure on the cold engine is allowed up to 0.8 MPa.
At the minimum idle speed, the oil pressure in the lubrication system of a heated engine must be at least 0.08 MPa.
The oil is changed every 8000 km. An oil change is allowed after 10,000 km.
Attention! In the case of using duplicate oils or fuels with a high sulfur content, the oil change should be carried out after (4000 ... 5000) km of run.
Duplicate oils include M-10 G2K and M-8 G2K.
The oil in the diesel engine crankcase is changed on a pre-warmed engine. To drain the oil, unscrew the oil sump plug. After all the oil has drained out of the crankcase, screw the plug back on.
Fill the diesel engine with oil through the oil filler pipe up to the level of the upper mark on the oil meter.
Fill the oil sump only with the oil recommended by this manual, appropriate for the period of operation.
The use of oils of other brands can lead to malfunctions of the diesel engine.
The oil filter is replaced simultaneously with the oil change in the engine crankcase and the results of the "COMMON RAIL" system diagnostics in the following sequence:
Clean any dirt from the interface between the oil filter and valve body 1.
Unscrew the FM 009-1012005 or M5101 filter from the fitting 3 using a special wrench or other available means.
Wipe the mating surface in the valve body.
Fill the new filter with clean oil and install (screw onto the fitting) the FM 009-101201 or M5101 filter assembly with gasket 4, which must be lubricated with engine oil beforehand.
After the cup gasket touches the filter housing, turn the filter another 1-1.5 turns.
Install the filter by hand only
Instead of the FM 009-1012005 and M5101 filter, it is allowed to install non-separable filter cartridges: mod. X149 by AS Lelko (France), mod. L37198 by "Purolator" (Italy) and other firms with anti-drain and bypass valves in the design with the main dimensions: - diameter - 95-105 mm; - height - 140-160 mm; - thread - 3 / 4-16UNF.
The safety (drain) valve is adjusted when the oil pressure in the engine lubrication system drops below 2.5 kgf / cm2.
The adjustment should be carried out with the engine off and warm.
Unscrew plug 4 (Fig. 3), remove gasket 5.
In the channel of the oil filter housing 3, use a screwdriver 7 to turn the adjusting plug 6 one turn towards increasing or decreasing the pressure value (depending on the actual pressure).
Install the gasket 5 and screw on the plug 4.
If necessary, repeat the indicated adjustment steps.