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7 Servicing/Maintenance
Fig. 26: Forcing screw
NOTE
The forcing screw is not included in the scope of supply. It can be ordered
separately from KSB.
7.4.4 Removing the mechanical seal and motor section
7.4.4.1 Removing the mechanical seal and motor part (versions YL and WL)
NOTE
Special regulations apply to repair work on explosion-proof pump sets.
Modifications or alteration of the pump set may affect explosion protection and are
only permitted after consultation with the manufacturer.
NOTE
The motors of explosion-proof pump sets are supplied in "flameproof enclosure"
type of protection. Any work on the motor part which may affect explosion
protection, such as re-winding and machining repairs, must be inspected and
approved by an approved expert or performed by the motor manufacturers. No
modifications must be made to the internal configuration of the motor space.
Repair work at the flameproof joints must only be performed in accordance with
the manufacturer's instructions. Repair to the values in tables 1 and 2 of EN 60079-1
is not permitted.
When dismantling the motor part and the connection cables make sure that the
cores/terminals are clearly marked for future reassembly.
1. Slide primary ring 433.02 along the shaft.
2. Undo and remove screws 914.02.
3. Remove intermediate casing 113.
4. Press mating ring 433.02 out of intermediate casing 113.
5. Remove circlip 932.03.
6. Remove primary ring 433.01.
7. Pull off mating ring carrier 476.
8. Take the mating ring out of mating ring carrier 476.
9. Take O-ring 412.02 out of mating ring carrier 476.
10. Take circlip 932.04 out of bearing bracket housing 355.
11. Remove bearing bracket housing 355.
12. Pull out rotor 818.
13. Remove circlip 932.01.
14. Remove circlip 932.02.
15. Pull off the two rolling element bearings 321.
Amarex N
53 of 84
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