952.5-0000010 OM
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5.4.4 General maintenance services
5.4.4.1
General guidelines
Carry out maintenance service operations, listed in subsection 5.4.4 as may be
necessary (i.
е
. when level sensor or dirtiness sensor responds).
5.4.4.2 Operation 72
.
Adjustment of oil pressure in the engine lubrication
system
Watch constantly oil pressure value in the engine lubrication system on the dial 19in
figure 2.6.1, located in the dashboard (as the engine is running with a rated speed and the
coolant temperature is 85 to 95
°
С
, the oil pressure shall stay at the level of 0.25 to 0.35
MPa, it is admitted that the pressure value be 0.6 MPa on the cold engine);
If the lubrication system is in good order (oil pipeline joints are tight, the safety valve
in the oil filter is in good order, etc.), but the lubrication pressure value constantly exceeds
0.35 MPa or is constantly below 0.25 MPa during the engine running under rated speed
with the normal coolant temperature, it is required to adjust oil pressure in the engine lubri-
cation system.
Adjust the oil pressure in the engine lubrication system as follows:
- undo a plug 3 (Figure 5.4.20), remove a shim 4;
- using a screwdriver 6 turn an adjusting plug 5 in the channel of the oil filter body 2
by one turn to the side of increasing or decreasing the pressure value (depending on the
actual pressure);
- mount the shim 4 and do the plug 3 in;
- if required repeat the above adjustment operations.
IT IS FORBIDDEN TO ADJUST OIL PRESSURE IN THE LUBRICATION SYSTEM
AS THE ENGINE IS RUNNING.
1 – oil filter; 2 – oil filter body; 3 – valve plug; 4 – plug shim; 5 – adjusting plug; 6 –
screwdriver; 7 – liquid and oil heat exchanger.
Figure 5.4.20 – Adjustment of oil pressure in the engine lubrication system
Increase pressure
Decrease pressure
