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