14
Wilo AG 05/2007
Englis
h
Maintenance and Repair
8.1 Cleaning
Clean the exterior of the pump using only a lightly dampened
cloth without detergents.
8.2 Checks
Under normal operating conditions, the pump does not require
regular maintenance work.
The following points, however, must be checked at regular
intervals.
8.3 Disassemble pump
Dismantle motor
1.
Disconnect pump from power supply and secure against
reconnection.
2.
Close shut-off device to front and rear of pump.
3.
If the connection cable is too short for disassembly, have an
electrician disconnect it.
4.
Remove all other connections (e.g. condensate drain).
5.
If motor is in horizontal installation position, support the
motor or secure it from falling with a crane and a suitable
hoist.
6.
Remove screws (1) and remove coupling guard (2) on both
sides.
7.
Loosen all coupling screws by a few turns. Do not, however,
remove the screws entirely.
8.
Remove other screws on motor flange.
9.
Pull out the motor (3) using a suitable hoist and remove.
Check
Solution
Leakages
If the leakage rate increases (> 5 ml/h [0.2 oz/hr]), replace the
mechanical seal
Motor noise and vibrations
Check whether the pump is being operated within the permit-
ted characteristic curve range (see product catalog).
If level of noise increases due to motor mounting or increased
vibrations, replace motor
Page 14, or replace the motor
mounting (see instructions from motor manufacturer).
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