Flowserve MP1 Sier-Bath - Manual (Page 30)

MP1 USER INSTRUCTIONS ENGLISH 26999958 – 10-12
Page 30 of 48 flowserve.com
machined surface at the split joint should not be used
as a reference surface for checking other aspects of
bracket machining. The bracket halves are match
marked to ensure correct assembly.
6.8.2 Disassembly
The following procedure is recommended for
disassembling the entire pump. Steps
“a” to “g” are
mandatory all the times. Steps “h” to “k” are sufficient
for removing only the Drive End (DE) mechanical
seals. Steps
“l” to ”s” are sufficient for removing only
the Non Drive End (NDE) mechanical seals.
It is highly recommended to mark the parts as they
come off the pump as DE or NDE, as well as DR
(DriveR shaft) and DN (DriveN shaft), depending on
where were they taken from. This might be needed if
the pump will be re-assembled with some of the used
parts still in good condition for re-use. Some parts as
the seal housing - bearing housing assemblies might
have been doweled during previous re-assemblies, as
opposed to have been factory machine doweled.
Spacers, if needed might have been specifically
ground to properly set up the axial position of
components, and they shall be installed in the same
location or position. Other equivalent parts, as
mechanical seals, bearings just settled in slightly
different positions after hours of operation, due to the
non-symmetrical way the loads are transferred to the
components of these twin screw pumps.
The numbers beside each part name are referenced to
the typical sectional drawing furnished in section 8
PARTS LIST AND DRAWINGS of this manual. If the
pump has additional parts specifically required for your
application, and they are not shown on this typical
sectional drawing, the specific sectional drawing for
your application can be requested from the factory.
a) Ensure that the driver is locked out and cannot be
accidentally started.
b) Ensure that the pump is isolated from the system
by closing off all primary and auxiliary piping
valves associated with the pump.
c) Flush the pump body and piping system if
necessary.
d) Drain the pump body & lube oil cavities.
e) Drain the seal flush & drain lines. Then disconnect
from seal
f) Remove coupling guard and uncouple the pump
from the driver by removing the coupling spacer.
g) Remove the pump half coupling.
h) Remove the DE cover [3530.1] from the DE
bearing housing [3459.1].
i) Remove the DE fasteners [6572.5] and the DE
bearing housing [3459.1] from the inner casing
[1110.1]. In this operation the radial bearings
[3012.1] will come out with the DE bearing
housing, but leaving their inner races on the shaft.
j) Remove the mechanical seals [4200.1 & 4200.2]
from the DE of the pump.
k) Remove the DE seal housing [4110.1].
l)
Remove the NDE cover [1610.1] from gear
housing [1600.1].
m) Remove the thrust bearings retainer plates
[8448.2] or the supernuts, depending on the
design you have.
n) Remove the thrust bearings [3013.1] using a puller
and eventually heating them up.
o) Remove the NDE fasteners [6572.3] and the gear
housing [1600.1] from the NDE bearing housing
[3459.1]. In this operation the timing gear bearings
[3012.2] will come out with the NDE bearing
housing, but leaving their inner races on the shaft.
p) Before removing timing gears [2300.1 & 2300.2]
from the shafts, note that the stamped letters on
their hubs are facing outboard. This is important
when reassembling the pump. Remove the
superbolt bearing locknuts [6580.1] and the timing
gears [2300.1 & 2300.2].
q) Remove the NDE fasteners [6572.5] and the NDE
bearing housing [3459.1] from the inner casing
[1110.1]. ]. In this operation the radial bearings
[3012.1] will come out with the NDE bearing
housing, but leaving their inner races on the shaft.
r) Remove the mechanical seals [4200.1 & 4200.2]
from the NDE of the pump.
s) Remove the NDE seal housing [4110.1].
t) Properly rig the drive shaft [2120.1] and the driven
shaft [2140.1] together with slings as close as
possible to the NDE of the screws. This is needed
to simultaneously pull them off from the pump, by
lifting them from the bottom of the inner casing
bores, where they have been resting since the
bearing housings were removed.
The slings should be used in a
choke type arrangement for lifting. Since it will be
difficult to exactly center the weight, use extreme
caution while removing the screws as light
pressure may be required to keep the screws
balanced as they are removed from the bores.
u) Use the slings to lift the screws just enough to
release them from contacting the bores. Carefully
start pulling them from the inner casing from the
NDE, controlling the pulling action to avoid
minimize contact or rub between the screws and
the bores. Light contact should not damage any
component.
v) Slowly move the screws out of the bores until the
discharge section of the screws is just outside of
the casing and allow the screws to rest on the