Lubrication system YaMZ-650

YaMZ-650 lubrication system mixed with "wet" sump

Gear-type oil pump, with gear drive, drive ratio - 1.31: 1.

Oil pressure (in the cylinder block line) of the engine, warmed up to 80 - 95˚ C, kPa (kgf/cm²):

  • - at nominal speed 400 - 650 (4.0 - 6.6);
  • - at minimum speed, not less than - 100 (1.0);
  • - when the emergency oil pressure sensor is triggered 60 - 80 (0.61 - 0.81).

Oil filter:

  • - coarse cleaning - two, full-flow, with replaceable filter elements (650.1012075);
  • - fine cleaning - centrifugal, with replaceable cartridge.

Oil filling volume - 36.4 liters.

Relative oil consumption for burnout, % of fuel consumption - no more than 0.1

Coarse filter

Replacement of filter elements. (see Fig. 1)

YaMZ-650 coarse oil filter

  • 1. To replace, unscrew the removable elements (1) (650.1012075).
  • 2. Fill the new filter elements with oil.
  • 3. Lubricate the seals with oil.
  • 4. Screw the removable elements manually until they touch the support side.
  • 5. Start the engine and check the reliability of the seal.
  • 6. If leaks are observed, dismantle the removable element(s), check the flatness of the sealing gasket and repeat the assembly.

Centrifugal oil purifier. (CMO) (650.1028010)

Removing the oil purifier

Removing the centrifugal oil purifier YaMZ-650

  • 1. Remove the centrifugal oil cleaner (1) (650.102801 0) by unscrewing the 3 bolts (2) securing it (310018).
  • 2. Remove the oil cleaner housing gasket (650.1028101).

Disassembling the oil cleaner

Centrifugal oil cleaner YaMZ-650

  • 1. Unscrew the nut (1).
  • 2. Remove the seal (2).
  • 3. Remove the cover (3).
  • 4. Remove the retaining ring (4).
  • 5. Set the gasket (5) aside.
  • 6. Remove the centrifuge rotor with the sealing ring (6) (650.1028180).
  • 7. If necessary, remove the axle (7), heat it in the area of ​​the seat and remove it from the oil purifier housing.
  • 8. Thoroughly clean all parts of the oil purifier.

Assembling the oil purifier

  • 1. Install the axle (7) using Loctite 542 sealant and tighten to the recommended torque (see table ▼).
  • 2. Install the centrifuge rotor with the sealing ring (6).
  • 3. Replace the seal (5).
  • 4. Replace the retaining ring (4).
  • 5. Install the cover (3).
  • 6. Install the seal (2), fit the nut (1) and tighten to the recommended torque (see Table ▼).

Installing the oil purifier

Install the centrifugal oil purifier in the reverse order of removal.

Tighten the oil purifier mounting bolts to the recommended torque (see Table ▼).

Tightening torques for units

Oil pan mounting nuts 20 ± 4 Nm

Oil pan mounting studs 20 ± 4 Nm

Centrifugal oil purifier cover mounting nut 30 ± 3 Nm

Cover mounting stud to centrifugal oil purifier support (sealant "Loctite 542") 30 ± 3 Nm

Oil pump mounting bolts 20 ± 4 Nm

Piston cooling nozzle mounting bolts 20 ± 4 Nm

Oil sump drain plug 70 ± 14 Nm

Heat exchanger oil drain plug 20 ± 4 Nm