Xylem LN - Manual (Page 60)

Installation, Operating and Maintenance Instruction Model L, LN
Page 56
8.2 General
Carry out disassembly and mounting according to the
appropriate sectional drawing (at the appendix).
You will only need common tools.
Before disassembly check if required parts are ready.
Disassemble the pump only so far, as required for the
replacement of the repair part.
9. Recommended Spare Parts, Spare Pumps
9.1 Spare Parts
Spare parts should be selected to last for two-year
continuous operation. If no other guidelines are
applicable, we recommend that you stock the number
of parts listed below (in accordance with DIN 24296).
Number of pumps
(incl. stand-by pumps)
2 3 4 5 6/7 8/9 10/+
Spare Parts Number of Spare Parts
Impeller 1 1 1 2 2 2 20%
Shaft with key and nuts 1 1 1 2 2 2 20%
Ball Bearing set 1 1 2 2 2 3 25%
Joints for pump casing
sets
4 6 8 8 9 12 150%
other joints sets 4 6 8 8 9 10 100%
Mech. Seals set 1 1 2 2 2 3 25%
Bearing (lantern with
bearing bracket,
complete with shaft,
bearings, aso.)
- - - - - - 2
To ensure optimum availability, we recommend
that suitable quantities of spare parts are held in
stock, especially if these are made from special
materials and in the case of mechanical seals,
because of the longer delivery times.
Spare Parts Order
When ordering spare parts, please supply the
following information:
 Type:
______________________________________________________________________
 S/N (Order No.):
_ ___________________________________________________
 Part name:
_____________________________________________________________
 Sectional Drawing
__________________________________________________
All the information is given in the data sheet and the
relevant sectional drawing.
Store spare parts in dry and clean rooms!
9.2 Stand-by pumps
It is essential that a sufficient number of stand-
by pumps are kept ready for use in plants where
failure of a pump could endanger human life or
cause damage to property or high costs.
Regular checks should be carried out to ensure
that such pumps are always ready for use (see
chapter 6.8).
Store stand-by pumps according to chapter 6.8.
10. Faults - Causes and Solutions
The following notes on causes of faults and how to
repair them are intended as an aid to recognising the
problem. The manufacturer's Customer Service
Department is available to help repair faults that the
operator cannot or does not want to repair. If the
operator repairs or changes the pump, the design data
on the Data Sheet and chapter 2 of these Operating
Instructions should be particularly taken into account.
If necessary, the written agreement of the
manufacturer must be obtained.