Lubrication system YaMZ-650

YAMZ-650 lubrication system mixed with a "wet" sump

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

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

  • - at rated 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 a replaceable cartridge.

The volume of oil filling is 36.4 liters.

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

Coarse oil filter

Replacing filter elements. (See Fig. 1)

YaMZ-650 oil coarse filter

  • 1. to replace, unscrew the removable elements (1) (650.1012075).
  • 2. Fill new filter elements with oil.
  • 3. Lubricate the seals with oil.
  • 4. Screw the removable elements by hand until they come into contact with the supporting side.
  • 5. Start the engine and check the tightness of the seal.
  • 6. In case of leakage, dismantle the removable element(s), check the flatness of the gasket and repeat the assembly.

Centrifugal oil cleaner. (CMO) (650.1028010)

Removing the centrifugal oil cleaner. (see Fig. 2)

Removing the YaMZ-650 centrifugal oil cleaner

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

Disassembly of the centrifugal oil cleaner. (see Fig. 3)

Centrifugal oil cleaner YaMZ-650

  • 1. Loosen the nut (1).
  • 2. Remove seal (2).
  • 3. Remove cover (3).
  • 4. Remove the circlip (4).
  • 5. Set aside the spacer (5).
  • 6. Remove centrifuge rotor with O-ring (6) (650.1028180).
  • 7. If necessary, remove the axle (7), warm it up in the area of ​​the seat and remove it from the oil cleaner housing.
  • 8. Thoroughly clean all parts of the oil cleaner.

Assembling a centrifugal oil cleaner

  • 1. Install axle (7) using Loctite 542 sealant and tighten to recommended torque (see table ▼).
  • 2. Install the centrifuge rotor with O-ring (6).
  • 3. Replace the seal (5).
  • 4. Replace the circlip (4).
  • 5. Install cover (3).
  • 6. Install the seal (2), screw on the nut (1) and tighten to the recommended torque (see table ▼).

Installing a centrifugal oil cleaner

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

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

Tightening torques for fastening the lubrication system units:

Nuts for fastening the oil crankcase 20 ± 4 Nm

Studs for fastening the oil crankcase 20 ± 4 Nm

Nut for fastening the cover of the centrifugal oil cleaner 30 ± 3 Nm

Stud fastening the cover to the support of the centrifugal oil cleaner (sealant "Loctite 542") 30 ± 3 Nm

Oil pump mounting bolts 20 ± 4 Nm

Bolts for piston cooling nozzles 20 ± 4 Nm

Drain plug for oil crankcase 70 ± 14 Nm

Oil drain plug on heat exchanger 20 ± 4 Nm