Flowserve LNGT - Manual (Page 35)

LNGT USER INSTRUCTIONS ENGLISH 00083107 02-08
Page 35 of 48
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ƒ Slide the mechanical seal [4200] over the pump
shaft [2110] until it seats against the pump
casing.
ƒ Slide the thrower [2540] as far as possible over
the pump shaft [2110].
ƒ Slide the V-rings (Labyrinth rings) [4330] as far
as possible over the pump shaft [2110].
6.9.7 Assembly of the bearing housings
This procedure describes how to assemble the
bearing housings to the pump casing.
If required, replace the V-rings (Labyrinth ring)
[4330] according to the following procedure:
ƒ Remove the V-ring (Labyrinth ring) from each
bearing housing [3200] using the appropriate
puller tool.
ƒ Press the new V-ring (Labyrinth ring) into each
bearing housing using the appropriate pressing
tool.
Assembly of the bearing housings:
ƒ Clean the assembly surfaces of the bearing
housings [3200] and the pump casing [1213
and 1214].
ƒ Position the bearing housings against the pump
casing and secure them using the taper dowel
pins [6810].
ƒ Fit the hexagon head bolts [6577].
ƒ Tighten the hexagon head bolts of the bearing
housings to the prescribed tightening torque
6.9.8 Assembly of the roller bearings
This procedure describes how to assemble the
roller bearings in the bearing housings.
ƒ Clean the assembly surfaces of the bearing
housings [3200], the pump shaft [2110] and the
roller bearings [3012].
ƒ Position the washer [2905] on the pump shaft.
ƒ Fill the roller bearings with bearing grease.
ƒ Fit the roller bearing [3012] on the non-driven
side so that it is seated against the stops of
both the bearing housing and the washer.
Make sure that the coding of the bearing points
to the front.
ƒ Attach the circlip [6541] and tighten the shaft
nut [2910].
ƒ Bending the lips of the circlip will secure the
shaft nut.
ƒ Fit the roller bearing [3012] on the driven side.
Slide the roller bearing so that it is seated
against the pump shaft stop. Make sure that
the coding of the bearing points to the front.
When assembling the bearings, you should use a
hydraulic jack. This will ensure that the forces on
the bearing are divided evenly, which will prevent
the bearing from becoming warped and will ensure
that the bearing is fully seated against the contact
surface.
6.9.9 Assembly of the bearing housing
covers
This procedure describes how to assemble the
bearing-casing covers.
If required, replace the V-ring (labyrinth ring) [4330]
according to the following procedure:
ƒ Remove the labyrinth ring from the bearing
cover [3260] using the appropriate puller tool.
ƒ Press the new labyrinth ring into the bearing
cover using the appropriate pressing tool.
Assembly of the bearing covers:
ƒ Clean the assembly surfaces of the bearing
housings [3200] and the bearing housing
covers [3260].
ƒ Fill 1/3 of the bearing housings with grease, if
the bearings are grease lubricated.
ƒ Position the bearing covers on the bearing
housings.
ƒ Fit the hexagon head bolts [6577].
6.9.10 Assembly of the V-rings (Labyrinth
rings) and throwers
This procedure describes how to assemble the
V-rings (Labyrinth rings) and the throwers on the
pump shaft.
ƒ Slide the V-rings (Labyrinth rings) [4330] into
the correct position.
ƒ Slide the throwers [2540] into the correct
position.
ƒ Fit the set screws.
ƒ Secure these set screws using a center punch.
6.9.11 Assembly of the mechanical seal
This procedure describes how to assemble the
mechanical seal.
ƒ Clean the assembly surfaces of the mechanical
seal [443].
ƒ Screw the seal plate into position against the
pump casing.
ƒ Fit the circlip of the mechanical seal in
accordance with supplier's instructions until the
mechanical seal is secured on the pump shaft.