Flowserve LN - Manual (Page 21)

LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09
Page 21 of 32 flowserve.com
6.3.2 Storage of spares
Spares should be stored in a clean dry area away
from vibration. Inspection and re-treatment of
metallic surfaces (if necessary) with preservative is
recommended at 6 monthly intervals.
6.4 Recommended spares and
consumable items
For start up purposes:
1 - Complete set of gland packing
2 - Shaft sleeves
1 - Set of gaskets and seals
Optional
2 - Mechanical seals
For 2 years operation:
1 - Set of bearings (line and thrust)
2 - Sets of gland packing
2 - Shaft sleeves
2 - Sets of gaskets and seals
2 - Lantern rings
2 - Casing wear rings
Optional
2 - Mechanical seals
2 - Impeller wear rings
For 4 years operation:
1 - Set of bearings (line and thrust)
2 - Sets of gland packing
2 - Shaft sleeves
2 - Sets of gaskets and seals
2 - Lantern rings
2 - Casing wear rings
1 - Impeller
1 - Complete set of mechanical seals and
gaskets
Optional
2 - Mechanical seals
2 - Impeller wear rings
6.5 Disassembly
Refer to section 1.6, Safety, before dismantling
the pump.
Before dismantling the pump for
overhaul, ensure genuine Flowserve replacement
parts are available.
Refer to sectional drawings for part numbers and
identification.
6.5.1 Rotor unit
a) Remove coupling guards and disconnect the
coupling halves.
b) Drain pump casing. Remove any auxiliary piping
if applicable.
c) Unscrew and remove bearing housing setscrews.
d) Remove the gland or seal cover stud nuts and
loosen gland or seal cover plates.
e) Unscrew and remove nuts above split flange on
upper half casing.
f) Drive out location pin (if fitted) from casing flange
halves.
g) Remove upper half casing.
h) Take out complete rotor unit and place onto two
support blocks.
6.5.2 Bearing housing
The bearing housings and bearings can be
removed without removal of the upper half casing if
desired.
a) Remove bearing cover setscrews and remove
key from shaft end.
b) Pull off bearing housing from rotor.
6.5.2.1 Line bearings
Remove bearing from shaft using a bearing puller
ensuring pulling force is applied to the inner race
only.
6.5.2.2 Thrust bearings
Unscrew and remove the self locking bearing nut and
remove the bearing using a puller as above.
6.5.3 Shaft seal
Stuffing box: remove gland, gland packing rings and
lantern rings using a bent wire.
Mechanical seal: remove seal cover complete with
the stationary seal ring which is held in place by the
O-ring seal.
6.5.4 Shaft sleeve
Loosen grub screw and unscrew shaft nut. Remove
shaft sleeve.
6.5.5 Wear rings
a) When removing the rotor unit, the casing rings
will be attached to it.
b) Impeller rings are also fitted; they are shrunk
onto the impeller and fixed with locking screws
between their diametral mating surfaces. To
remove the impeller rings, remove the locking
screws and heat up the ring until it slides off
easily.