Wilo SCP Série Notice De Montage Et De Mise En Service page 68

English
9.4.3 Impeller
Inspect the impeller as follows:
• Examine the impeller for damage.
• For corrosive /erosion pitting.
• Cavitations pitting.
• Bent or cracked vanes, inlet and outlet vane end
wear.
If damage is extensive, impeller may need replace-
ment.
Further information should be sought from Wilo
before any decision on repair work is undertaken.
• Around the eye, wearing rings protects the impel-
ler. Examine around the eye at neck portion for
grooving in alignment with spindle axis; slight
grooving is acceptable but deep or profuse groo-
ving must be remedied by machining the impeller
by taking a polish cut on wearing ring. Spare wear
rings are supplied with excess outside diameter to
facilitate machining after fitting. The wear rings
are shrink fitted on impeller neck and are screwed.
NOTE:
Impeller wearing rings are an optional feature to
enhance the protection for impeller eye. In stan-
dard case pump is supplied with neck ring only.
• To check wear around the impeller neck, use pre-
cision instruments such as outside micrometer to
accurately measure the outside diameter. Measu-
rements should be taken at intervals around the
Pumps
Designation
SCP 50-220 HA
SCP 50-180 HA
SCP 50-340 HA
SCP 50-340 DS
SCP 65-390 HS
SCP 80-230 HA
SCP 80-200 HA
SCP 80-380 DS*
SCP 80-340 HA
SCP 80-360 DS
SCP 100-270 HA
SCP 100-280 HA
SCP 100-360 HA
SCP 100-400 HA
SCP 100-410 DS
SCP 125-290 HA
SCP 125-330 HA
SCP 125-440 HA
SCP 125-470 HA
SCP 125-460 DS
SCP 150-290 HA
SCP 150-390 HA
SCP-150-350 HA
68
9.4.4 Shaft & keys
9.4.5 Bearings
BALL BEARINGS
DRIVE END EXISTING NDE
Size Size
6204 2z 6302 2z
6304 2z 6304 2z
6304 2z 6304 2z
6305 2z 6305 2z
6305 2z 6305 2z
6305 2z 6305 2z
6305 2z 6305 2z
N206 6305 2z
6305 2z 6305 2z
6306 2z 6306 2z
6305 2z 6305 2z
6305 2z 6305 2z
6305 2z 6305 2z
6305 2z 6305 2z
6307 2z 6307 2z
6306 2z 6306 2z
6306 2z 6306 2z
6306 2z 6306 2z
6308 2Z 6308 2Z
6309 2z 6309 2z
6306 2Z 6306 2Z
6308 2z 6308 2z
6308 2z 6308 2z
circumference to check the uneven wear. Diffe-
rences between the neck OD and the neck ring ID
measured will give us the clearance between the
two. Clearance thus obtained should not be more
than 150% of maximum designed clearance.
Shaft should be checked for the trueness, or any
other mechanical damage and corrosion. If the
shaft is not true within 0.1 mm TIR (Total Indicated
Reading), it should be replaced/repaired. Examine
the shaft keys and keyways. Remove damaged or
worn out keys.
The ball bearings fitted on the SCP range are grea-
sed for life. Then no maintenance is required.
Check that bearing rotates freely and smoothly,
verify that the outer ring presents no abrasions or
discoloration. If there is any doubt regarding the
serviceability of the bearing it should be replaced.
As exceptions, the (*) marked models of SCP
receive bearing which need re-greasing.
The re-filling must take place each 1000 hours of
operation and the grease fully replaced every
3000 hours or earlier if the local prescription
requires it.
NDE NAMEX SCP
Size
3302 A
3304 A
3304 A
3305 A
3305 A
3305 A
3305 A
3305 A
3305 A
3306A
3305 A
3305 A
3305 A
3305 A
3307A
3306A
3306A
NOT SUITABLE
3308 A
3309
3306A
3308 A
3308 A
WILO SE 10/2019