Installation and operating instructions Wilo
–
SCPV pumps
30
Causes
Remedies
27
Rotating part rubbing on stationary part.
Incorrect assembly, correct the assembly.
28
Bearing worn.
Check lubrication, shaft run out, alignment, replace if required
29
Wearing rings worn.
Replace.
30
Impeller damaged.
Replace.
31
Casing gasket defective, permitting internal
Replace.
leakage.
32
Shaft or shaft sleeves worn or scored at packing. Replace.
33
Packing improperly installed.
Use correct grade and size of packing
34
Type of packing incorrect for operating condi-
Use correct grade and size of packing.
tion.
35
Shaft running' out of center because of worn
Rectify.
bearings or misalignment.
36
Rotor out of balance, causing vibration.
Balance the rotor.
37
Gland too tight, resulting in no flow of liquid to
Adjust gland. Ensure sealing water flow
lubricate packing.
38
Cooling liquid not being provided to water-
Provide.
cooled stuffing boxes.
39
Excessive clearance at bottom of stuffing box
Check pumps assembly.
between shaft and casing, causing packing to
be forced into the pump.
40
Dirt or grit in sealing, liquid leading to scoring of
Provide clean liquid for flushing.
shaft or shaft sleeve.
41
Excessive thrust caused by mechanical failure
Check pump operation and assembly
inside pump or by failure of hydraulic balancing
device, if any (in case of multistage pump etc.)
42
Excessive grease or oil in antifriction bearing
Attend.
housing or lack of cooling, causing excessive
bearing temperature.
43
Lack of lubrication.
Provide proper lubrication.
44
Improper installation of antifriction bearings
Rectify or replace bearing.
(Damage, incorrect assembly of stacked bea-
rings, use of unmatched bearings as a pair et c.)
45
Dirt in bearings
Investigate the cause and clean bearing.
46
Rusting of bearings from water in housing
Arrest water ingress.
47
Excessive cooling of water- cooled bearing,
Reduce cooling water flow.
resulting in condensation of atmospheric
moisture in bearing housing.
11 Decommissioning and Recycling
The disposal of all material or debris must be done
in order to protect the environment.
The Wilo pumps do not contain any dangerous
substances. The major part of the pump is
recyclable. The disposal and recycling of the pump
sets must be done in accordance with the local in
force regulations.
The dismounting must be done by qualified per-
sonal.
Clean and decontamination must be achieved
before any transportation or recycling
