Basic instructions for disassembling and assembling the water pump D-245E3
Water pump disassembly
Remove the pump from the engine.
Unscrew nut 9 (Figure 1) securing the water pump drive pulley.
Picture 1 - Water Pump
Using a puller, remove the water pump pulley 7.
Remove ring 12 from the pump housing, which locks the bearing assembly.
Remove the plug 10 from the end of the impeller 3, remove the impeller from the pump shaft 2 using a threaded hole in the end of the impeller (M18x1.5) using a special bolt.
Press the shaft with bearings out of the water pump housing.
The direction of pressing is towards the installation of the pulley.
Press the bearings off the shaft.
Remove thrust ring 13.
Press the stuffing box out of the pump body.
Defect details.
Disassembly of the water pump with electromagnetic fan clutch
Figure 2 - Water Pump with Magnetic Fan Clutch
Disconnect plug 13 (Figure 2) and remove the pump from the diesel engine.
Remove cap 7, unscrew nut 8(left thread), remove washer 9 and fan housing 10.
Using a puller, remove the pulley 11 and the flanged solenoid 12.
Remove lock screw 3 from the water pump housing.
Remove the plug 4 from the end of the impeller 5 and remove the impeller from the pump shaft using a threaded hole in the end of the impeller (M18x1.5) using a special bolt.
Press the bearing shaft out of the water pump housing.
The direction of pressing out is shown in the figure.
Press the seal 6 out of the water pump housing.
Disassembly of the water pump with a viscous fan clutch
Unscrew the bolts 3 (Figure 3) fastening the spacer 2 with the fan 1 to the pulley 7 (Figure 3) of the water pump.
Figure 3 - Fan drive
Note: if it is necessary to replace the viscous fan drive coupling, holding the spacer 2, unscrew the coupling with the fan with a key S = 32 (left thread), and then unscrew the four bolts 8 (Figure 5) that fasten the coupling to the fan.
Unscrew the nut 9 (Figure 1) securing the pulley 7.
Using a puller, remove the pulley 7 of the water pump, remove the key 8.
Remove ring 12 from the pump housing, which locks the bearing assembly.
Remove the plug 10 from the end of the impeller 3, remove the impeller from the pump shaft 2 using a threaded hole in the end of the impeller (M18x1.5) using a special bolt.
Press the shaft with bearings out of the water pump housing. The direction of pressing is towards the installation of the pulley.
Press the bearings off the shaft.
Figure 5 - Fan installation
Remove thrust ring 13.
Press the stuffing box out of the pump body.
Defect details.
Water pump assembly
Install thrust ring 13 on the pump shaft, press on the bearings.
Fill the bearings and bearing cavity with Litol 24-ML and 4/12-3 grease in the amount of 45 grams
Press the shaft with bearings into the pump housing.
Install ring 12, which locks the bearing assembly.
Install the pump pulley, washer and nut. Tighten the nut, providing a torque value of 120 ... 140 Nm.
Through the mandrel, press the water pump seal 4 with the inner housing onto the water pump shaft and, at the same time, press the outer seal housing into the water pump housing until the seal housing flange stops against the mating surface of the pump housing.
In this case, the design of the mandrel should ensure that the inner seal housing is pressed in so that the end surface of the inner housing is located at a distance of 11.2 ± 0.2 mm from the mating surface of the pump housing.
Press the impeller onto the shaft, install the plug into the end of the impeller.
The sinking of the end of the impeller relative to the mating plane of the pump housing should not exceed 0.3 mm, the protrusion of the impeller is not allowed.
Install the water pump on the diesel.
Attach spacer with fan to water pump pulley or fan.
Water pump assembly with electromagnetic fan clutch
Press the bearing shaft into the pump housing so that the lock screw holes in the bearing housing and the water pump housing are aligned.
Tighten the locking screw.
Figure 4- Main design dimensions of the mandrel for pressing in the water pump seal
Through a drift (Figure 4), press the water pump seal with the inner case onto the water pump shaft and, at the same time, press the outer seal case into the water pump housing until the seal housing flange rests against the mating surface of the pump housing.
At the same time, the design of the mandrel should ensure that the inner seal housing is pressed in so that the end surface of the inner housing is located at a distance of 11.2 ± 0.2 mm from the mating surface of the pump housing (the mounting dimension is shown in Figure 1).
Press the impeller onto the shaft. The sinking of the end of the impeller relative to the mating plane of the pump housing should not exceed 0.3 mm, the protrusion of the impeller is not allowed.
Install a plug into the end of the impeller.
Press an electromagnet with a flange onto the pump body (The outer diameter of the mandrel when pressed must not exceed the diameter of the flange hub).
Press the pulley onto the shaft.
Mount the fan housing and washer onto the shaft.
Tighten the nut (left-hand thread), providing a torque value of 120 ... 140 Nm and install the cap.
Install the water pump on the diesel and connect the plug.