Removing the water pump

  • 1. Remove the clamp by unscrewing the bolts (2) fastening the pipe of the inlet water pump (1) (650.1303060)
  • 2. Remove the coolant outlet pipe from the air compressor (650.3909280) by unscrewing the union nuts from the water pump and air compressor.
  • 3. Remove the water pump (650.1307010) by unscrewing the bolts (3).

Removing the YaMZ-650 water pump

4. Remove the water pump gasket (650.1307048).

Disassembly of the water pump (we are guided by figure No. 2)

  • 1. Disconnect the tube supplying the water pump assembly (18).
  • 2. Set aside the O-rings (12). (Fig. 2)
  • 3. Remove complete assembly (2 - 4).
  • 4. Set aside the O-ring (1).
  • 5. Remove the complete assembly (8 - 11).

Removing the YaMZ-650 thermostat

  • 6. Remove the thermostat (5) (see Fig. 3).
  • 7. Remove the O-ring (6)

Thermostat control

Checking the YaMZ-650 thermostat

Dip the thermostat in a tank of water.

Heat slowly while stirring the water.

Check the opening start temperature.

Check thermostat opening at 90˚C (see Fig. 4)

Installing the YaMZ-650 water pump impeller

  • 1. Moisten the outer surface of the O-rings (9, 10) with soapy water.
  • 2. Install the bearing housing with the shaft, impeller and gear of the water pump assembly, respecting the direction (see Fig. 5).
  • 3. Install thermostat (5).

Water pump assembly

4. Install the assembly (2 - 4) in the kit and tighten with the recommended torque (see Table).

Fan support studs

pre-tightening torque: 50 ± 5 Nm

final tightening torque: 120 ± 12 Nm

Coolant inlet plug

fluids to the heat exchanger

40 ± 5 Нм

 

Nuts for pipeline fittings

coolant

25 ± 5 Нм

 

Water pump mounting bolts

20 ± 4 Нм

Tension bolts

fan belt roller

40 ± 8 Нм

Coolant drain plug

on the heat exchanger tube

40 ± 5 Нм

 

Water pump mounting studs

30 ± 6 Нм

Water pump installation

Installed Vka water pump YaMZ-650

  • 1. Install the gasket on the water pump.
  • 2. Lubricate the seating surfaces of the water pump necks.
  • 3. Install the water pump on the front cover, engage the pump gear with the intermediate gear.
  • 4. Turn the pump around the axis so that the elbow is located opposite the fitting neck of the coolant drain box from the cylinder head (see Fig. 6).

Installation of the YaMZ-650 water pump

  • 5. Install the nozzle on the neck, moving the water pump to the cover, exercising pressure at the level of the thermostat box.
  • 6. Install 3 bolts in the pump mounting holes and screw into the cover. Install a wire bracket under one of the bolts.
  • 7. Tighten the pump mounting bolts with torque Mcr = 204 Nm.
  • 8. Install the sealing ring on the water pump inlet pipe. Apply grease with a brush to the O-ring and to the mounting hole of the water pump (see Fig. 7)

Installation of the YaMZ-650 water pump

  • 9. Install the supply pipe into the hole of the water pump, slightly turning around the axis.
  • 10. Screw in the two bolts securing the pipe flange and tighten to Mcr = 204 Nm.
  • 11. Install the bracket on the front cover (see Fig. 8), screw in 2 bolts and tighten to a torque of Mcr = 408 Nm.
  • 12. Install the clamp, screw in 2 bolts of its fastening and tighten with a torque of Mcr = 408 Nm.