Series MNK pedestal group 4
Page
19
9230-003-en
Revision 19
TM 10458
Edition 06/2022
7.7 Notes on assembly
♦
Use original spare parts. See also
Section 2.4
.
♦
Do not use any defective parts.
♦
Has the pump been shut down, drained and flushed
in accordance with the regulations?
See also
Section 6.3
.
♦
Apply Anti-Seize special assembly paste (e.g. from
Weicon) to the fitting surfaces and screw thread
prior to assembly.
♦
The thread in the impeller
230
, the inner magnet as-
sembly
859
and on the pump shaft
211
must not be
greased as otherwise no optimum glued connection
is possible.
♦
The bushes
523/1
in the impeller
230
and
523/2
in
the inner magnet assembly
859
, the O-rings
412
and the housing gasket
401
as well as the rotary
shaft seals
421
at oil bath lubrication should always
be replaced.
♦
Important dimensions on centrings, bearing fits or
bearing play must be checked prior to final assem-
bly. If necessary, perform a trial assembly.
♦
Structure and details see the exploded drawing in
section 9
and sectional drawing in
section 10
.
♦
Many metallic particles adhering to magnetic com-
ponents such as the inner magnet assembly
859
and drive magnet assembly
858
must be removed
prior to assembly. For this purpose simple plas-
ticene can be used..
♦
A complete assembly process is described in the
following. Sub-sections can be deduced from this.
7.8 Assembly
7.8.1 Assembly of drive unit Long life
grease lubrication
♦
Press roller bearings
321/1
and
321/2
on the drive
shaft
213
.
♦
Push drive shaft unit into the bearing pedestal
330
,
mount wavy spring washer
953/1
and rear bearing
cover
361
and tighten all components with the hex.
socket screws
914/6
. (Torque 15 Nm)
♦
Position bearing pedestal unit vertically and secure
(e.g. in a vice).
♦
Secure drive magnet assembly
858
on the drive
shaft
213
on the flat pivot point.
Caution ! Magnetic forces!
Risk of accident !
♦
Insert toothed lock 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.
7.8.2 Assembly of drive unit oil bath lu-
brication
♦
Screw hex. screw
901/4
into the bearing pedestal
330
.
♦
Put shaft seal ring
421/2
in the bearing pedestal
330
.
♦
Insert shaft seal
421/2
and o-ring
412/1
into the rear
bearing cover
161
.
♦
Press radial ball bearings
321/1
and
321/2
onto the
drive shaft
213
.
♦
Push drive shaft unit into the bearing pedestal
330
,
mount wavy spring washer
953/1
and rear bearing
cover
361
and tighten all components with the hex.
socket screws
914/6
. Torque 15 Nm.
♦
Position bearing pedestal unit vertically and secure
(e.g. in a vice).
♦
Secure drive magnet assembly
858
on the drive
shaft
213
on the flat pivot point.
Caution ! Magnetic forces!
Risk of accident !
♦
Insert toothed lock 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 as-
sembly.
