Series MNK pedestal group 4
Page
22
9230-003-en
Revision 19
TM 10458
Edition 06/2022
♦
Screw the pump shaft
211
into the pump rotor
859
and simultaneously lower the assembly carefully.
♦
When lowering, make sure that the square of the
bearing bush
545/x
remains in the impeller
230
.
♦
At last thread tighten the impeller
230
with momen-
tum.
After screwing the pump shaft
211
a distance of about
3 mm is between the impeller
230
and the plain bearing
pedestal
339
.
The distances
X
and
Y
are given in the works certifi-
cate.
See sectional drawing in
Section 10.1
.
The dimensions
"
X",
"Y
"
and
"Z"
are always to be
checked with the rotating unit against the suction noz-
zle.
X
: Distance behind the impeller = 2.9 to 3.7 mm
Y
: Distance in front of the impeller = 2.5 to 3.5 mm
Z
: axial play of the plain bearings 0.4 to 1.3 mm.
These distances must be observed. The dimension
Y
can be affected by the thickness of the housing gasket.
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 pro-
vided 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.
Caution ! Magnetic forces!
Risk of accident !
♦
Remove threaded rods and seal the tapped bores
again with the protective caps.
♦
Screw the bearing pedestal
330
with washer
554/11
and hex. socket screw
901/17
to the lantern
344
.
♦
Transport the drive unit using the crane hook lug
moulded on the lantern.
As an adiitonal aid, the ring bolt 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 hous-
ing screws
901/3
and tightening washers
552/3
.
♦
When tightening the housing screws
901/3
, make
sure that the support bracket
183
is firmly posi-
tioned. If necessary, undo support bracket, align
and secure again.
For tightening torques, see
Section 1.1
.
The distances
X
and
Y
are given in the works certifi-
cate. See sectional drawing in
Section 10.1
.
The dimensions "
X"
and "
Y"
are always to be checked
with the rotating unit against the suction nozzle.
X
:
Distance behind the impeller
=
2,9 to 3,7 mm
Y
:
Distance in front of the impeller =
2,5 to 3,5 mm
These distances must be observed. The dimension
Y
can be affected by the thickness of the housing gasket.
