4.Isolate and depressurize flushing/quench system.
5.Close the inlet and discharge valves.
6.Drain and purge the pump casing and pipe work.
7.Clean the pump externally before disassembly.
11.4Disassembly
11.4.1 Removal of pump casing and impeller – AS 40, 50, 60, 65 and 80
See sectional drawings AS40 page 18, AS 50 page 19
1.Remove the mechanical seal flushing pipes 71 on V and Q executions.
2.Remove the shroud (44) with screws (46) (if shroud is assembled).
3.Loosen screws (28) to remove the motor (50).
4.Gently pull the motor (50) away from the bearing housing (5).
5.Motor sizes up to IEC 112. If necessary remove the adjustable foot frame by loosening the two nuts (30) and the screws (29).
6.Motor sizes larger than IEC 112. If necessary remove the adjustable foot frame by loosening the screws (29) to remove the front foot (20), and the rear foots (23).
7.Loosen and remove the casing clamp (9).
8.Remove the casing cover (2).
9.Unscrew the impeller nut (10)
10.Remove the impeller key (11).
11.Remove the clearance shims (19).
11.4.2 Removal of pump casing and impeller – AS 42 and AS 52
See sectional drawings AS 42 page 23 and AS 52 page 24
1.Remove the mechanical seal flushing pipes 71 on V and Q executions.
2.Remove the shroud (44) with screws (46) (if shroud is assembled).
3.Loosen the screws (28) to remove the motor (50).
4.Gently pull the motor (50) away from the bearing housing (5).
5.Motor sizes up to IEC 112. If necessary remove the adjustable foot frame by loosening the two nuts (30) and the socket head screw (29).
6.Motor sizes larger than IEC 112. If necessary remove the adjustable foot frame by loosening the socket head screw (29) to remove front foot (20), and the rear foots (23).
7.Loosen and remove the rag bolt (38).
8.Remove the casing cover (2).
9.Remove the first impeller (3) as well as the impeller key (11).
10.Remove the
11.Remove the second impeller (3) as well as the impeller key (11).
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