General Maintenance Services; General Instructions; Operation 71. Adjustment Of Oil Pressure In The Engine Lubrication System - Belarus 922.6 Operator's Manual

1, 3, 4, 10 – lever; 2 – quadrant; 5 – adjusting bolt; 6 – locknut; 7 – link; 8 – yoke; 9, 11 –
pin.

5.4.4 General maintenance services

5.4.4.1 General instructions

Carry out maintenance service operations listed in subsection 5.4.4 as may be neces-
sary (i.е. according to corresponding pressure or dirtiness sensor indications).
5.4.4.2 Operation 71. Adjustment of oil pressure in the engine lubrication
Watch constantly oil pressure value in the engine lubrication system on the dial 9 in Fig-
ure 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 admit-
ted 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 lubrication system.
Adjust the oil pressure in the engine lubrication system as follows:
- undo a plug 3 (Figure 5.4.28), 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 5.4.28 – Adjustment of oil pressure in the engine lubrication system
B
Figure 5.4.27 – Adjustment of parking brake control
C
Increase pressure
Decrease pressure
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922.6-0000010 OM
system