Related information
8.1 Servicing Grundfos pumps with explosion-proof motors
8.2 Oil check and change
11.9 Fitting the seal ring and wear ring (SE1)
1. Lubricate the seal ring (46) with oil.
2. Place the seal ring in the pump housing (50).
3. Fit the seal ring (46) in the pump housing (50).
Make sure the seal ring is properly fit, otherwise use
the seal ring mounting tool.
TM028421
Fitting the seal ring
4. Place the wear ring (49c) on the impeller (49).
5. Fit the wear ring (49c) with a hammer and a wooden block.
TM028423
Fitting the wear ring
Related information
5.5 Seal ring mounting tool
11.10
Fitting the impeller
1. Fit the corrugated spring (157) and the key (9a). Keep the key
(9a) in position while fitting the impeller (49).
2. Fit the impeller (49).
3. Fit the washer (66), nord-lock washer (66b), and the screw
(188a).
4. Tighten the screw (188a) to a torque of 75 Nm. Hold the impeller
(49) with the strap wrench.
TM028407
Removing the impeller
5. Mark the position of the pin (6a) on the pump housing (50).
6. Mark the position of the pin hole on the oil chamber.
7. Fit and lubricate the O-ring (37) with oil.
Related information
6. Tightening torques and lubricants
11.11 Fitting the pump housing
1. Mark the position of the pin (6a) on the pump housing (50).
2. Mark the position of the pin hole on the oil chamber (58).
3. Fit and lubricate the O-ring (37).
4. Lower the motor into the pump housing (50) with a crane.
5. Mark the sleeve (150) and pump housing (50) to place the
motor correctly. Lower the motor into the pump housing (50).
6. Fit the clamp (92).
7. Tighten the screw (92a).
8. Check if the impeller (49) rotates freely and without drag.
Related information
6. Tightening torques and lubricants
11.12 Fitting the pin housing
TM069234
Fitting the pin housing
1. Pull the wires (coming from the stator) gently through the plug
protector (177).
2. Fit the plug housing (177) to the stator housing (55).
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