Flowserve MN - Manual (Page 41)

MN USER INSTRUCTIONS ENGLISH 71569189 11/04
Page 41 of 49
®
6.7.5 Bearing end play
Bearing
Frame
Recommended
end play
mm
(in.)
End play adjustment
mm
(in.)
Thrust bearing
static load rating
kg (lb.)
with full tang movement with 1/4 Tang movement
4T 0.03 – 0.10
(0.002 - 0.004)
0.08
(0.0033)
0.02
(0.0008)
2250
(4970)
5T 0.03 – 0.10
(0.002 - 0.004)
0.08
(0.0033)
0.02
(0.0008)
5580
(12300)
6 0.03 – 0.10
(0.002 - 0.004)
0.07
(0.0028)
0.02
(0.0008)
6220
(13700)
6A 0.03 – 0.10
(0.002 - 0.004)
0.07
(0.0028)
0.02
(0.0008)
8850
(19500)
7L 0.03 – 0.10
(0.002 - 0.004)
0.11
(0.0044)
0.03
(0.0011)
6560
(14470)
7H 0.03 – 0.10
(0.002 - 0.004)
0.11
(0.0044)
0.03
(0.0011)
7200
(15880)
8L 0.03 – 0.10
(0.002 - 0.004)
0.11
(0.0044)
0.03
(0.0011)
10240
(22580)
8H
8HA
0.03 – 0.10
(0.002 - 0.004)
0.11
(0.0044)
0.03
(0.0011)
15950
(35170)
9H
9HA
0.08 - 0.16
(0.003 - 0.005)
0.17
(0.0066)
0.04
(0.0016)
23550
(51920)
6.8 Examination of parts
Used parts must be inspected before
assembly to ensure the pump will subsequently run
properly. In particular, fault diagnosis is essential to
enhance pump and plant reliability.
6.8.1 Casing, seal housing and impeller
a) Inspect for excessive wear, pitting, corrosion,
erosion or damage and any sealing surface
irregularities.
b) Replace as necessary.
6.8.2 Shaft and sleeve (if fitted)
Replace if grooved, pitted or worn.
6.8.3 Gaskets and O-rings
After dismantling, discard and replace.
6.8.4 Bearings
a) It is recommended that bearings are not re-used
after any removal from the shaft.
b) The plain liquid lubricated bearings may be re-
used if both the bearing bush and bearing sleeve
show no sign of wear, grooving or corrosion
attack. (It is recommended that both the bush
and sleeve are replaced at the same time.)
6.8.5 Bearing isolators, labyrinths or lip seals
(if fitted)
a) The lubricant, bearings and bearing housing
seals are to be inspected for contamination and
damage. If oil bath lubrication is utilized, these
provide useful information on operating
conditions within the bearing housing.
b) If bearing damage is not due to normal wear and
the lubricant contains adverse contaminants, the
cause should be corrected before the pump is
returned to service.
c) Labyrinth seals and bearing isolators should be
inspected for damage but are normally non-
wearing parts and can be re-used.
d) Bearing seals are not totally leak free devices.
Oil from these may cause staining adjacent to the
bearings.