Installation, Operating and Maintenance Instruction
Model L, LN
LN 100-ger/fr/eng
Page 54
Revision 03
Artikel No. 771073301
Issue
01/2010
b) Drained pumps
Turn shaft at least 1x week (do not switch on
because of dry running).
Replace bearings after 4 years.
7. Servicing, Maintenance
7.1 General remarks
Maintenance and servicing work must only be
carried out by trained, experienced staff who
are familiar with the contents of these Operating
Instructions, or by the Manufacturer's own
service staff.
Work should only be carried out on the pump or
pump unit when it is not in operation. You must
observe chapter 2.
7.2 Mechanical seals
Before opening the pump, it is essential that you
note chapter 2 and chapter 3.2.
If the liquid being handled leaks out at the mechanical
seal, it is damaged and must be replaced.
7.3 Coupling
Check the clearance in the coupling components
regularly approx. every 1000 operating hours, but at
least 1x year, the radial clearance in the coupling parts
must be checked.
For couplings with rubber pads the following applies:
Unless a clearance in the couplings is necessary, the
coupling pads may wear out to approximately ¼ of
their usual thickness, before they have to be changed.
To measure the clearance in the coupling place a
mark on the O.D. of each coupling hub (see following
pic). Then fixing one hub, turn the opposite hub as far
as possible. Then measure the distance (
∆
S
V
)
between the marks of the coupling. If this measure
exceeds the value given in the chart, the packings
must be replaced. They must be replaced in sets.
Size
80 95 110 125 140 160 180 200 225 250 280 315 350 400
∆
S
v
[mm] 5,0 6,0 7,0 8,0 8,5 8,0 8,0 8,5 9,0 10,0 11,5 10,5 11,5 13,0
If wear is heavy, it must be assumed that the
motor is not properly aligned with the pump or
that the distance between the coupling sections
has changed. Replace worn elements and re-
install or adjust coupling, as described in
chapter 5.3.
7.4 Cleaning of pump
The pump must not be cleaned with pressurised
water - water will get into the bearings.
Dirt on the outside of the pump has an adverse effect
on transmission of heat. The pump should therefore
be cleaned with water at regular intervals (depending
on the degree of dirt).
8. Dismantling and repair of pump
8.1 General remarks
Repair to the pump or pump system may only
be carried out by authorised skilled personnel or
by the manufacturer’s specialist staff.
When disassembling the pump pay attention to
chapter 2 and chapter 4.1.
For mounting and repair you can order specialized
personnel if you want.
If dangerous liquids are pumped the appropriate
disposal of the handled liquid is necessary
before the disassembly of the pump. Pay
attention to the fact, that even in drained pumps
there are remainders of the handled liquid. If
necessary the pump must be flushed or
decontaminated. Laws must be observed,
otherwise danger to health is existing!
Before the disassembly the pump has to be
secured in such a way, that it can’t be started.
The pump casing must be drained and without
pressure.
All locking devices in the suction- and discharge-
pipe must be closed.
All parts must have taken on the temperature of
the environment.
Secure disassembled pumps, units or single
parts against tipping over or rolling off.
While disassembling the pump use of an open
flame (blowlamp, etc.) only, when there is no
danger of setting fire, cause an explosion or
cause injurious vapours.
Never apply heat to remove the impeller nut.
Use of heat may result in severe physical injury
and property damage.
Use original spare parts only. Pay attention to
the right materials and the matching design.
Summary of Contents for L Series
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