English (GB)
6
5. Dismantling and assembly
5.1 General information
If it is necessary to dismantle the pump, either because it is
choked or damaged, please follow the instructions in the following
sections.
Position numbers of parts (digits) refer to section
;
position numbers of tools (letters) refer to section
Before dismantling the pump
• Disconnect the power supply to the motor.
• Close the isolating valves, if fitted, to avoid draining the
system.
• Remove the electric cable in accordance with local
regulations.
Before assembling the pump
• Clean and check all parts.
• Replace defective parts by new parts.
• Order the necessary service kits.
• Gaskets and O-rings should always be replaced when the
pump is overhauled.
During assembly
Lubricate and tighten screws and nuts to correct torque.
See section
3. Tightening torques and lubricants
5.2 Dismantling the pump
1. Remove staybolts (pos. 26).
2. Remove clamping flange (pos. 6a) and sleeve (pos. 16).
3. Remove O-ring (pos. 5c) and water trap (pos. 5b).
4. Remove the two empty chambers (pos. 4f).
5. Remove valve chamber (pos 4e).
6. Remove spring valve (pos. 5e and 5d) from valve chamber
(pos. 4e).
7. Remove spring (pos. 5e) from base (pos. 5d).
8. Hold clamp (pos. 64c), and remove nut (pos. 67) by using
both tools D.
9. Remove lock washers (pos. 66) and clamp (pos. 64c).
10. Remove impeller (pos. 49).
11. Remove chambers (pos. 4).
12. Remove spacing pipe (pos. 64).
13. Continue the dismantling until short spacing pipe (pos. 64a),
rubber seal retainer (pos. 64g) and rubber seal (pos. 64f), and
remove those components.
14. Remove impeller (pos. 49), air separator chamber (pos 4d)
and spacing pipe (pos. 64).
15. Remove shaft seal (pos. 105). See fig.
Fig. 3
Exploded view of shaft seal
16. Remove O-ring (pos. 31) and cover plate (pos. 32).
TM
04
43
27
19
09
Note
Dismantling of MG 71 and MG 80, see section
Dismantling of MG 90 and MG 100, see section
