Replacing Mechanical Seals
SD 5 00 01 / 2
Lutz-Jesco GmbH
Improved changes are always reserved without notice.
How to replace a mechanical seal (B2i version)
Important!
The pump must be disconnected electrically to make sure that the motor
does not start unintentionally.
a)
Loosen cap nuts
1
.
b)
Remove spacer bolt
2
from spiral casing
3
and casing flange
4
.
c)
Pull away casing flange
4
and spiral casing
3
towards the front.
d)
Unscrew impeller cap
5
.
Caution!!! Left-hand thread.
e)
Remove safety pin
6
.
f)
Unscrew crown nut
7
(left-hand thread)
and remove washer
8
.
g)
Push impeller
9
smoothly towards the front using two assembly levers.
h)
Remove mechanical seal
10
now visible with two srew drivers towards the front.
i)
Push back-plate
11
with counter-ring flange
12
out of spacer
13
using two
assembly levers.
j)
Loosen screws
14
at counter-ring flange
12
.
k)
Push counter-ring of mechanical seal
10
from rear out of counter-ring flange
12
.
For reassembly proceed in reverse order.
During disassembly please check the following:
- Has shaft protection sleeve
15
been damaged?
- Has the seat of counter-ring flange
12
been damaged?
- Have other components been damaged or are they worn out?
All o-rings should be replaced when assembling a dismounted pump.
