WKT
17
Weekly supervision
Check:
a) Pump operation point;
b) Motor current consumption and net tension value;
c) Vibration and abnormal noises;
d) Bearing housing temperature;
e) If applicable, the gland packing should drip slightly
whilst the pump is running. The gland should only be
tightened lightly.
Monthly supervision
Check:
a) Oil change interval, (if applicable).
Semestral supervision
Check:
a) Base frame and motor fix bolts;
b) Pump-motor set alignment;
c) Coupling lubrication (when applicable).
Annual supervision
Disassemble the pump for maintenance. After cleaning,
inspect bearings, (do it in detail), retainers and / or
bearing sealings, joints, O´rings, impellers, casing internal
regions (control also thickness), wear areas and coupling.
Note:
In installations with good operation conditions and
pumped liquid not aggressive to the pump materials, the
supervision can be done each 2 years.
7.2.2 Lubrication and lubricant change
See section 6.1.4.
7.3 Drainage / disposal
If the pump was used for handling liquids
posing health hazards, see to it that
there is no risk to persons or the environment when
draining the fluid. All relevant laws must be heeded. If
required, wear safety clothing and a protective mask!
If the fluids handled by the pumps leave residues which
might lead to corrosion when coming into contact with
atmospheric humidity, or which might ignite when coming
into contact with oxygen, then the unit must be flushed
through, neutralized, and then for drying purposes
anhydrous gas must be blown through the pump.
The flushing fluid used and any liquid residues in the
pump must be properly collected and disposed of without
posing any risk to persons or the environment. See also
section Discard (3.3.2).
7.4 Dismantling
Before dismantling the pump, secure it so as to
make sure it cannot be switched on accidentally.
The shut-off valve in the discharge line must be closed.
The pump set must have cooled down to
ambient temperature, pump pressure must
have been released and the pump must have been
drained including oil of bearing housing, if any.
Dismantling and reassembly must always be carried
out in accordance with the relevant sectional
drawing.
7.4.1 Fundamental instructions and recommendations
Repair and maintenance work to the pump must only be
carried out by specially trained personnel; using original
spare parts (see 2.7).
Observe the safety regulations laid down in section
7.1. Any work on the motor shall be governed by the
specifications and regulations of the respective
motor supplier.
Dismantling and reassembly must always be carried
out in accordance with the relevant general assembly
drawing. The general assembly drawing and other
relevant documents are found in the annex. The
dismantling sequence can be derived from the
general assembly drawing.
In case of damage you can always contact our
service departments.
7.4.2 Dismantling the pump
7.4.2.1 Dismantling the thrust bearing
1. Pull the pump end half coupling off drive shaft (213)
with the aid of puller. Remove key (940.4).
2. Unscrew and remove oil labyrinth (270);
3. Unscrew bearing cover (360), and remove centering
sleeve (526) together with antifriction bearing (320)
and bearing cover (360) from the shaft by twisting the
centering sleeve. Pull the bearing cover (360) off the
centering sleeve (526).
4. Dismantle constant level oiler (638) together with its
connecting pipe.
5. Unscrew bearing housing (350) force it off and pull if off
over shaft (213) together with oil stand pipe (641).
6. Unlock and unscrew withdrawal nut (923.2), push
antifriction bearing (320) off the centering sleeve,
clean it with wash oil and examine it.
7.4.2.2 Dismantling the shaft seal
Gland packing
1. Unscrew screws (914.31) in clamping ring (184).
2. Pull the shaft protection sleeve together with the
clamping ring off the shaft.
3. Unscrew hex nuts (920.31) and remove stuffing box
gland (452).
4. Remove packing rings (461) and seal cage ring (458)
from the stuffing box housing, if any.
Mechanical seal
See specific instructions.
Caution
To Next Page
