Flowserve LNGT - Manual (Page 32)

LNGT USER INSTRUCTIONS ENGLISH 00083107 02-08
Page 32 of 48
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accordance with the instructions provided by the
relevant supplier.
If no coupling with spacer is present, disassemble
the coupling in accordance with the instructions
provided by the relevant supplier and remove the
electric motor in line with the instructions of the
relevant supplier.
6.8.1 Disassembly of the upper half [1214] of
the pump casing
Remove the upper half of the pump casing
according to the following procedure;
ƒ Remove the nuts [6581] from the gland stud
bolts [6572].
ƒ Slide the glands [4120] as far as possible
towards the bearing housings; do not stop
sliding until the gland stud bolts are free.
ƒ Remove the nuts [6581] from the pump casing
stud bolts [6572]
ƒ Separate the upper half from the bottom half of
the pump casing using distance bolts [6575].
Turn the distance bolts clockwise a few times in
sequence, so that the upper half comes away
evenly from the bottom half of the pump casing.
This working method prevents the wearing
rings and centring shoulders from being
damaged.
ƒ Attach the lifting gear to the lifting lugs of the
upper half, giving appropriate consideration to
the lifting instructions. as described.
ƒ Turn the distance bolts clockwise a few times in
sequence until the centring shoulder is free. Be
careful when doing so, because the play
between the impeller or the impeller wearing
ring and the casing wearing ring is very limited.
ƒ Remove the packing [4590] from both the top
and the bottom halves of the pump casing and
dispose of the packing material correctly. This
packing should be used only once.
ƒ Remove the taper dowel pins [6810] from the
upper half of the pump casing.
6.8.2 Disassembly of the rotor from the
bottom half of the pump casing
This procedure describes how to remove the rotor,
including bearing housings, from the bottom half of
the pump casing.
ƒ Remove the hexagon head bolts [6577] at the
bearing housings.
ƒ Remove the taper dowel pins [6810] from the
bearing housings.
ƒ Attach the lifting gear around the bearing
housings. Carefully hoist the rotor, including the
bearing housings, from the bottom half of the
pump casing in order to prevent parts from
being damaged. When doing so, appropriate
consideration should be given to the lifting
instructions.
6.8.3 Disassembly of the bearing housing
covers
This procedure describes how to remove the
bearing housing covers.
ƒ Remove the V-ring (Labyrinth ring) (Labyrinth
ring) [4330] from the pump shaft. The V-ring
(Labyrinth ring) (Labyrinth ring) should be
disposed off correctly. During assembly, the old
V-ring (Labyrinth ring) (Labyrinth ring) should
be replaced by a new one.
ƒ Remove the hexagon head bolts [6577].
ƒ Remove the bearing housing covers [3266]
6.8.4 Disassembly of the roller bearings
This procedure describes how to remove the roller
bearings from the pump shaft and the bearing
housings.
ƒ Bend the lips of the circlip [6541] open and turn
the shaft nut [2910] from the pump shaft.
ƒ Remove the circlip.
ƒ Remove the roller bearings [3012] from the
pump shaft and from the bearing housings
using the correct tools.
ƒ Remove the ring [2510] from the pump shaft.
This ring is used to center the impeller within
the pump casing.
6.8.5 Disassembly of the bearing housings
This procedure describes how to remove the
bearing housings.
ƒ Remove the bearing housings [3200]. Mark the
bearing brackets in order to distinguish the
drive-side bearing bracket from the non-drive
side bearing bracket during assembly.
6.8.6 Disassembly of the casing wearing
ring[s]
This procedure describes how to remove the
casing wearing rings.
The casing wearing rings were removed while
disassembling the rotor from the bottom half of the
pump casing and are now loosely arranged around
the impeller or the impeller wearing ring.
ƒ Remove the casing wearing rings [1500],
including the cylindrical pins [6811].