MTZ 1220.1, Operator'S Manual

Page: 218 / 244

MTZ 1220.1/1220.3 K. Scheduled technical maintenance
K38
Overall maintenance
Operation 52. Adjust oil pressure in the
engine lubricating system
If the oil pressure in the lubrication system
of a warmed-up engine at a rated crank-
shaft speed is below 0.28 MPa (2.8
kgf/cm²), stop the engine and correct the
fault. Check tightness of the oil lines and
serviceability of the relief valve in the oil
filter. One way to increase the pressure is
adjustment of the relief valve, paper oil fil-
ter in a special shop.
Operation 53. Adjust the relief valve of
the gearbox centrifuge
The valve (2) maintains an oil pressure in
the system of 0.9 to 1.0 MPa (9 to 10
kgf/cm²).
If the pressure drops below the specified
limit, adjust the valve (2) by installing addi-
tional washers (5) between the spring (3)
and the plug (6).
IMPORTANT! If the pressure drops be-
low 0.7 MPa (7.0 kgf/cm²), stop the trac-
tor and contact a technician.
The valve (7) maintains an oil pressure
before the rotor of the centrifuge. It must
be 0.75 MPa (7.5 kgf/cm²).
The lubrication valve (12) is set for a pres-
sure of 0.2 ± 0.05 MPa (2.0 ± 0.5 kgf/cm²)
and maintains the oil pressure in the GB
lubricating system. Adjust the valves with
the washers (9) and (11).