Flowserve BP - Manual (Page 28)

BP USER INSTRUCTIONS ENGLISH 85392725 10-09 (E)
Page 28 of 44 flowserve.com
If phase disk is fitted on thrust end of shaft
a) Remove bolts from bearing end cover [3266] and
remove the cover. Remove gasket [4590] for
bearing end cover [3266].
b) Loosen bearing nut [3712.2] by using the hooker
(Tool List No.9], and then remove bearing nut
[3712.2], bearing washer [2905], phase disk and
key [6700] from thrust end of shaft.
c) Remove bolts from bearing end cover [3266] and
remove the cover with seal ring [4305].
d) Remove shim pack [6196/3645].
Tag and record thickness of shims for re-
assembly.
e) Loosen the set screws in the deflector [2540],
slide it back on the shaft towards the mechanical
seal.
f) Loosen and remove nuts holding the upper half
of the thrust bearing housing [3230] (bearing cap)
to the stuffing box [4112]. Remove cap screws
and dowel pins furnished between upper and
lower half of the bearing housing. Rig eye bolt in
bearing cap to an overhead hoist. and lift it from
lower half of bearing housing and place on
blocking on floor.
g) The inboard and outboard thrust bearing
assembly [3032] can now be removed from the
bearing housing [3230]. Tag thrust bearing
assemblies to ensure they will be returned to
their original position. Refer to thrust bearing
drawing and instructions in this manual.
h) Remove cap screws and dowel pins from journal
bearing.
i) Remove upper half of journal bearing. Using a
bar and a block of wood under the pump shaft,
raise shaft slightly and roll out the lower half of
journal bearing.
j) Install two eye bolts on the lower half of the
bearing housing [3230] and rig to an overhead
hoist. Loosen and remove nuts holding the
bearing housing [3230] to the stuffing box [4112].
Using the overhead hoist, lower and remove the
bearing housing away from the stuffing box and
place on blocking on the floor.
k) Loosen lock nut [3712.2] by using hooker (Tool
List No.8) and remove bearing nut.
l) Loosen thrust collar nut [3712.1] by using lock
nut wrench (Tool List No.7) and remove thrust
collar nut.
m) Remove thrust collar [3610] and key [6700]. It
may be necessary to apply heat to thrust collar to
remove it. Do not allow temperature to rise above
104°C (220°F) when heating thrust collar.
Temperature can be checked with “tempil stick”.
Remove shims [6196/3645]. Record thickness of
shims and tie together to prevent shims from
being separated.
6.7.3 Mechanical seal removal
a) Remove deflector [2540] located at the
mechanical seal side from pump shaft.
b) Refer to the Instruction manual for mechanical
seals. Remove the nuts from the mechanical seal
cover [4200] and take off the mechanical seal
[4200] carefully together with shaft sleeve.
c) Remove the tightening nuts from the suction
head [1222] which is fitted in the casing barrel
[1100] and take off the suction head with the
throat bushing [4132] by using forcing off bolts
(jack screws).
d) Remove the spiral wound gasket [4590] for
suction head [1222]. This point in time, support
the coupling end of the shaft by a wooden stand.
And then dismantle the parts on the thrust side
(anti-coupling side).
e) Remove the tightening nuts for the stuffing box
[4112] and take out the stuffing box with the
throat bushing [4132] by using forcing off bolts.
f) Remove the spiral wound gaskets [4590] for the
stuffing box.
6.7.4 Rotor assembly removal
a) Remove the tightening nuts [6572] and the
washers [2905] from the discharge head [1221]
and take off the discharge head [1221] with the
balancing ring [1600] by using forcing off bolts
(jack screws). Be careful not to damage the
gasket sealing face of the discharge head.
b) Remove the spiral wound gaskets [4590]
c) Screw two centre bolts (Tool List No.18) into the
last stage diffuser. Place the plate (Tool List
No.17) through the centre bolts (Tool List No.18)
and coupling (Tool List No.16) against the head
of the tightening studs [6572] for the discharge
head [1221] and fix the plate with two tightening
bolts (Tool List No.19) using the hookers (Tool
List 8/9]. Next, install a shaft lug (the lifting
device for the shaft) (Tool List No.4) on the part
of the shaft where thrust bearing is attached, and
fix the lifting device with the thrust collar nut
[3712.1].
d) Using the hookers (Tool List 8/9), rotate the nuts
(Tool List No.18) of the centre bolts to pull out the
inner element, from the casing barrel [1100]
toward the thrust end. When the inner element
(the rotor assembly) is pulled sufficiently out of
the casing barrel [1100], remove the centre bolts,
bolts and plate (Tool List No.17, No.18&No.19).
Then fit the lifting lug (Tool List No.2) on the outer
surface near to the centre of gravity of the inner
element.