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7 Servicing/Maintenance
4. Place motor unit 80-1 including rotor 818 with bearing and bearing housing 350
on a wooden support and protect it against rolling off. (ð Section 3.2, Page 12)
5. Remove circlip 932.01 and disc 550.05.
6. Carefully pull mechanical seal 433.02 and the mating ring of the mechanical seal
off the shaft.
7.5.6 Dismantling the motor section
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 section which could affect explosion
protection, such as re-winding and repair work involving machining, must be
inspected and approved by an approved expert or performed by the motor
manufacturer. 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 in accordance with the
values specified in EN 60079-1 Table 2 is not permitted.
When dismantling the motor section and the electric cables make sure that the cores/
terminals are clearly marked for future reassembly.
7.5.6.1 Removing the motor housing cover
Fig. 36: Removing the motor housing cover
ü Suitable lifting equipment is provided.
ü The pump set has been disconnected from the power supply. It has been securely
placed on a level surface in a vertical position.
1. Attach bail 571 to the lifting equipment.
2. Undo hexagon socket head cap screws 914.03.
3. Carefully lift off motor housing cover 812.
4. Remove the cable ties.
Amacan P
571
812
835
914.03
350
63 of 112
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