Flowserve MP1 Sier-Bath - Manual (Page 31)

MP1 USER INSTRUCTIONS ENGLISH 26999958 – 10-12
Page 31 of 48 flowserve.com
bores, to have the opportunity to move the location
of the sling to a the middle section between the
flights on the screws.
w) Carefully lift both screws to just raise them off the
bottom of the bores. Please note the screws are
not exactly balanced which will require light
pressure to compensate right as the screws exit
the bores. This is needed to prevent damage to
screws or bores during the removal process.
x) Examine parts as recommended in section 6.10
Examination of parts.
6.9 Removing inner casing from outer
casing
If it is required to remove the inner casing [1110.1]
from the outer casing [1110.2], follow this section. In
this case the inner casing [1110.1] needs to be re-
inserted to the outer casing before the final re-
assembly.
To separate the Inner and Outer Casing the following
procedure is to be followed after the disassembly.
a) Remove the pump suction spool piece [1800.1]
from the casing assembly.
b) Remove the casing key [6700.2] from the liner and
outer casing by removing the cap screw [6579.3]
holding it in place.
c) Place the casing assembly made of the outer
casing [1110.2] and inner casing [1110.1] on its
DE, so that the locking ring [6548.2] and the shear
ring [6548.1] are accessible from the top.
d) Remove locking ring [6548.2] from pump.
e) Remove shear ring [6548.1] from casing. It may be
necessary to pry it out by means of set screws
[6574.1] mounted in the shear ring.
f) Gently lift the inner casing [1110.1] from the outer
casing [1110.2].
6.10 Examination of parts
a) Inspect the pumping rotors and body bores for
excessive wear or damage.
Note: If the difference between the body bore diameter
and the pumping rotor diameter is twice the quoted
operating clearance or greater, an evaluation of the
pump's performance may be required, to decide
whether the screws and/or the inner casing must be
refurbished or replaced.
b) Inspect bearings for wear and the presence of
foreign matter. Replace if damaged or worn.
Bearings
manufacturer typically recommend
replacing bearings anyway if you cannot control or
guarantee they are free of debris or dirt that might
have gotten inside of them during the disassembly
or re-assembly process.
c) Inspect all gaskets and o-rings for damage. It is
recommended that these items be replaced to
avoid problems with reassembly.
d) Inspect and clean internal bores of seal housings.
e) Clean and inspect all gasketed surfaces.
f) Clean the shafts and inspect for corrosion,
evidence of cracking, fatigue, or mechanical
damage. Remove all nicks and burrs. Check that
shafts are straight within 0.050 mm (0.002 in.).
6.11 Inserting inner casing into outer
casing
Clean the mating surfaces of the inner casing [1110.1]
& outer casing [1110.2], including grooves for sealing
o-ring [4610.1] and shear ring [6548.1], before starting
the insertion, to ensure that they are free of dirt &
debris. All other pump parts shall be out from the inner
casing before starting to insert the inner casing into the
outer casing.
a) Ensure the four (4) orifice [6578.3] are installed
into bottom of inner casing [1100.1].
b) Install anti-rotation inner casing key [6700.2] in
outer casing [1110.2]. It may need to be held in
place by temporary means while installing the
inner casing into the outer casing.
c) Install new o-rings [4610.1 & 4610.2] onto inner
casing [1110.1]. Use plain grease to hold them in
place while the inner casing [1110.1] is inserted
into the outer casing [1110.2].
d) Turn outer casing [1110.2] to lay on the NDE,
having the anti-rotation inner casing key [6700.2]
nearest to ground.
e) Carefully lower inner casing [1110.1] fitted with o-
rings [4610.1 & 4610.2] into outer casing [1110.2]
making sure to line up the keyways between the
inner and outer casings. Install the cap screw to
hold key if not installed earlier.
f) Install three oval set screws (5/16 in. X ¾ in. long)
into the locking ring, if used [6548.2] & six into the
shear ring [6548.1].
g) Install shear ring [6548.1] [segmented ring six
pieces].
h) Apply a “never seize” type compound to the
mating surfaces of the locking ring [6548.2] and
the shear ring [6548.1].
i) Install locking ring [6548.2] and torque locking ring
bolts (12, 7/16 in. socket head capscrews 2.5 in.
long) to 20 ft·lbs.