Richter MNK Series - Manual (Page 20)

Series MNK 200-150-315
Page 20
9230-053-en Revision 12
TM 8195 Edition 03/2011
Secure drive magnet assembly 858 on the drive
shaft 213 on the flat pivot point.
Caution! Magnetic forces!
Risk of accident !
Insert wavy spring washer 934/4 and tighten the
hex. socket screw 914/5 to a torque of 40 Nm. For
this purpose, do not use any magnetisable tools if
at all possible.
7.8.3 Trial assembly of the slide-in unit
Without adhesive
Without O-rings 412/3, 412/4
For assembly, see Section 7.8.3.
Dismantled trial-assembled unit and perform
assembly.
7.8.4 Assembly of slide-in unit
With the O-rings 412/3, 412/4
With 1 drop of adhesive on each shaft thread, e.g.
Loctite 243 from Loctite or an equivalent.
Only one drop of the adhesive is to be applied per
thread.
Otherwise the next dismantling operation will be
more difficult or no longer possible without
destroying components.
The mating surfaces of pump shaft/inner magnet
assembly and pump shaft/impeller must be
completely clean.
Place impeller 230 with the suction side facing
downwards on the work bench.
Press shaft sleeve 523/1 into the impeller 230.
Insert O-ring 412/3 into the appropriate groove in
the impeller 230.
Check whether the mating surfaces of the pump
shaft 211 and impeller 230 are absolutely clean
and the thread is burr-free.
Provide one thread turn of the pump shaft 211 with
adhesive, e.g. Loctite 243.
Screw pump shaft 211 into the impeller 230.
Clamp pump shaft 211 with the flat pivot point in a
vice. Use smooth vice jaws for this purpose.
Tighten the impeller 230 using a strap wrench or
appropriate special tool (see Section 11.3).
Place the assembled unit in turn, with the suction
side of the impeller 230 facing downwards, on the
work bench.
Push bearing sleeve 529/1 over the pump shaft
211 and position the flat pivot point in the impeller
230.
Push the bearing bush 545/1 onto the bearing
sleeve 529/1.
Push axial bearing 314/1 onto the pump shaft 211.
Move plain bearing pedestal 339 into assembly
position using a crane. For this purpose the 4 M10
tapped bores on the motor side can be used as a
slinging aid (ring bolt etc.).
Carefully lower the plain bearing pedestal 339
centrally over the pump shaft 211. Make sure that
the positive connections of the axial bearing 314/1
and the bearing bush 545/1 engage properly. If
assembly is performed correctly, there is a
distance of approx. 3 mm between the impeller
230 and the plain bearing pedestal 339.
Push the axial bearing 314/2 over the pump shaft
211 and position in the plain bearing pedestal 339.
Insert bearing bush 545/2 into the plain bearing
pedestal 339.
Press shaft sleeve 523/2 into the inner magnet
assembly 859.
Push O-ring 412/4 over the pump shaft 211.
Check whether the mating surfaces of the pump
shaft 211 and inner magnet assembly 859 are
absolutely clean and the thread is burr-free.
Provide one thread turn of the pump shaft 211 with
adhesive, e.g. Loctite 243.
Push bearing sleeve 529/2 half its length onto the
pump shaft 211.
Carefully screw inner magnet assembly 859 onto
the pump shaft 211. It is imperative to ensure that
the flat pivot point of the bearing sleeve 529/2
engages the positive connection of the inner
magnet assembly 859 and thus also turns during
the screwing process.
Using a strap wrench or special tool, screw the
inner magnet assembly 859 and the impeller 230
firmly together.
The axial play Z of the plain bearings is 0.4 to
1.3 mm. See sectional drawing Section 10.1.
7.8.5 Final assembly
Transport the drive unit using a crane. The ring
bolt on the bearing pedestal flange can
be used for this purpose.
Screw the two assembly threaded
rods M 16 provided into the tapped bores of the
bearing pedestal flange.
Press the drive unit into the lantern chamber using
the flat pivot point of the threaded rods and an
open-jaw wrench (size 13). The threaded rods
must be turned evenly and alternately provided
can be screwed into the bearing pedestal flange at
12 o'clock.
Beforehand, remove the threaded sealing cap.
As a result, two slinging aids are available.
Push the entire slide-in unit with housing gasket
401 into the housing 100 and screw together with
housing screws 901/3 and tightening washers
552/3.