Pump size
Impeller type
Forcing screw
Thread
Code
250-400
300-400
7.4.3.2.2 Removing the impeller with cylindrical interference fit with key
1. Unscrew socket head cap screw 914.10 and impeller hub cap 260.
2. Pull off impeller with a special puller. (
3. Remove key 940.01.
7.4.3.2.2.1 Using a special puller
1. Screw hexagon head bolt 1 into the shaft end to prevent the shaft thread from
being damaged.
2. Screw part 2 into the impeller.
3. Screw threaded bolt 3 into part 2 and pull off the impeller.
Table 22: Special pullers for removing the impeller
Pump size
Impeller type
Puller
100-401
150-401
151-401
200-330
250-400
250-401
300-400
300-401
E, F, K
AV1
200-401
K
200-401
E
AV2
7.4.3.3 Dismantling the mechanical seal
Dismantle the mechanical seal in accordance with the general arrangement
drawings.
7.4.3.3.1 Dismantling the pump-end mechanical seal
✓
The back pull-out unit and the impeller have been removed as described above.
1. Pull the rotating assembly of mechanical seal 433.02 off shaft 210.
2. Remove discharge cover 163 from bearing bracket 330.
3. Push the stationary seat of mechanical seal 433.02 out of discharge cover 163.
7.4.3.3.2 Dismantling the motor-end mechanical seal
✓
The back pull-out unit and the impeller have been removed as described above.
1. Remove taper lock ring 515 or circlip 932.03.
2. Pull the rotating assembly of mechanical seal 433.01 off shaft 210.
914.10
260
940.01
Fig. 22: Cylindrical
interference fit
3
2
1
Fig. 23: Puller
7 Servicing/Maintenance
Amarex KRT
45 of 74
Goodnal STP ST041 Sewage Delivery (Amarex KRT Submersible Motor Pump) Vendor Manual
Q-Pulse Id VM362
Active 29/10/2013
Page 47 of 96
