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)

• 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)

• 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)

• 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