Flowserve MJ Slurry - Manual (Page 31)

MJ SLURRY USER INSTRUCTIONS ENGLISH 71569294 - 02/08
Page 31 of 42
®
the sleeve such that it protrudes about 19 mm (0.75)
below the bearing.
6.10.7 Multiple Intermediate Bearings
When there are multiple intermediate bearings there
will be 2 pc shafts. These will be coupled together
normally with a threaded type coupling. The direction
of drive will prevent coupling from coming loose.
6.10.7.1 2 pc Shafts
a) Inspect the end of the shafts and remove all dirt
and debris. Ensure that there are no burrs that
could prevent the shafts from seating against
each other squarely.
b) Thread the coupling onto the upper shaft.
c) Lift the lower shaft and align with the coupling
and screw into the coupling.
The end of the shafts must seat against
each other squarely to ensure that bearings and
impeller are properly aligned.
d) Install the intermediate bearing [3044] into the
bearing housing [3240], lock into place using
stainless steel setscrews.
e) Slide the housing onto shaft and position into the
support pipe spigot. The housing should align to
the top plate flush ports.
f) Slide the next section of support pipe over the
shaft and bolt into position. Secure bolts with
Loctite A. Tighten in accordance with table 2 for
steel bolts or table 3 for stainless steel bolts.
Repeat steps for addition intermediate bearings.
6.10.8 Lower Column Pipe
a) The orientation of the lower pipe must be such
that the access hole for the lower bearing [3000]
flush water is in alignment with the top plate.
b) Install the lower shaft sleeve onto the shaft. The
sleeve must be seated with Loctite A or 680.
c) Assemble the lower bearing [3000] into the lower
housing [3240] Align the flush port in the seal 90
degrees to the ports in the housing. Secure into
position using setscrews.
d) Slide the bearing housing [3240] over the shaft
and align the flushing port to the support pipe.
e) Install the sleeve stop [2460] on to the shaft
[2110] and seat to the shaft sleeve.
6.10.9 Lower Bearing Housing
a) Install studs in the gland side wear plate [1915.2]
and secure with loctite 242.
b) With gland side wear plates positioned with the
studs facing up; lift the lower seal housing [3200]
and lower onto the wear plate. Place the seal
washers [2905] over the studs followed by the
steel washers. Apply Loctite 242 or equivalent to
nut threads and fasten wear plate in position.
Torque nuts per table.
Assemble the lower bearing housing [3200] over the
shaft sleeve [2445] and orientate the flush port
with the mating hole in the column pipe to suit
auxiliary piping.
d) Seat the housing against the column pipe.
(Temporarily clamp the housing in place.)
6.10.10 Impeller Installation
a) Install the impeller spacer [2460] on standard
pumps only and install the impeller gasket
[4590.2] on all pumps.
b) Due to the method of assembling the impeller, it is
recommended to smear the sleeve face and both
sides of the impeller spacer [2460] with heavy
grease or a silicon sealant before assembling onto
the shaft, which will help to hold the impeller
spacer in position during assembly.
c) Apply anti-seize compound to the shaft threads
and screw the impeller onto the shaft. For large
sizes it is more practical to hold impeller using a
sling and hoist and turn the shaft.
Failure to tighten the impeller [2200]
spacer [2460] securely against the sleeve may
cause serious damage to pump components.
The thread is designed so that during
operation the impeller will tend to tighten onto shaft.
Therefore a clockwise shaft rotation (looking from
coupling end) will screw impeller on.
d) Release the thrust bearing housing hold down bolts
and tighten the jacking screws to pull the impeller
back to the stuffing box head [3200]. The stuffing
box head must not be rigidly clamped.
6.10.11 Suction Side Wearplate
a) Install the studs [6572] in the wearplate [1915.1]
using Loctite grade A or equivalent.
b) Lift wearplate and install into casing.
c) Place the sealing washer [2905] over the studs
[6572]. Secure wearplate [1915.1] in place using
hex nuts and washers using Loctite 242 or
equivalent. Tighten in accordance with Table tables
in section 6.6.
Excessive or uneven tightening torque may distort
wearplate affecting impeller running clearances or result in
broken studs.