Maintenance
Maintenance
760.0002 GB - 150 500
BA-2011.11
Series AE1F, AE1L, AE.E, AE.N, AE.H, AE.V, AED1E,
AED2N
ID, ZD construction types
23
Relubrication
Relubrication is performed via lubrication
nipple (119) screwed into bearing cover (110).
Continue adding lubrication until the old grease
escapes at the bearing cover (131) (
sectional drawings on pages 43, 44, 45, 46,
47, 48 and 49).
Wipe away the old grease.
9.1.4 Shaft seal
The shaft is sealed either via a stuffing box or
a mechanical seal.
Danger!
Functional inspection and/or
adjustment requires unhindered
access to the shaft seal.
Danger of being drawn in and
trapped!
Perform work on the pump only
when the pump is shut down.
9.1.4.1
Stuffing box
The stuffing box may exhibit elevated leaks in
the first hours of operation, but this normally
decreases on its own during the run-in time.
If necessary, lightly tighten hexagon nuts (202)
at stuffing box gland (203).
Note that a slight leak is necessary at the
stuffing box. This leak serves to carry off
frictional heat produced at the sealing surface.
If leak losses increase excessively and if
several efforts to tighten the hexagon nuts
(202) do not reduce the leaks, then the
packing rings have lost their shape elasticity
and must be replaced.
Removing old packing rings and cleaning
the stuffing box casing
Old packing rings can be removed after
depressurizing the pump and removing the
stuffing box gland. Use a packing extractor
with a flexible shaft. Then carefully clean the
stuffing box area and the area of the drive
shaft near the packing rings.
Worn drive shafts or shaft protective sleeves
must be replaced (see section 10 page 26 ).
Installing the packing rings
Caution!
Use only packing rings that meet
the pump’s required operating
conditions!
Refer to the table in section 9.1.7 page 25 for
the dimensions and required quantity of pre-
pressed packing rings and ring blanks or cut
lengths.
If using blanks, we recommend a straight cut
perpendicular to the shaft. To achieve a gap-
free, parallel alignment of the cut ends when
closing the packing ring, the cut angle should
be approximately 20° at both ends (
see
image below).
Fig. 8 Cutting the packing rings
Caution!
Pre-pressed packing rings or
ring cuts should be carefully rolled
up in the axial and radial direction
so that they can be just slipped
over the shaft. Bending the rings up
can lead to buckling and damage!
During installation into the packing area, the
packing rings must be carefully bent back into
ring shape. The cut joints must be displaced by
90°. Use the stuffing box gland to insert each
ring individually into the stuffing box area with
the cut ends forward. The seal chamber ring or
flushing ring is then inserted as required.
Caution!
Never use pointed objects because
these may damage the shaft and
deform the packing materials.