Flowserve QLQ Vertical Worthington - Manual (Page 46)

QLQ, QLQC USER INSTRUCTIONS ENGLISH 87900027 – 06/14
Page 46 of 61
p) If a rigid coupling is installed between the thrust
bearing and the sealing device, remove bolting of
the coupling spacer. Turn rotor adjusting nut
enough to remove rigid coupling spacer. Remove
the spacer.
q) Turn rotor adjusting nut until rotor rest on bottom
suction case.
r) Disconnect suction piping (if present on the
pump) and the discharge piping.
s) Lifting of short set pumps:
Refer back to section 2.3.
 Remove bolts that secure pumps to support
beam or foundation
 Attach a sling to pump lifting hooks and the
lift the pump vertically
 If present, unbolt and move aside pump
support beams
 Draw the entire pumping unit out of the
foundation opening
 Position pump horizontally on suitable
supports for disassembly in a safe and clean
area
 Refer to the following dismantling instruction
t) Lifting of deep set pumps:
 Remove bolts that secure pumps to support
beam or foundation
 If installed, remove the rigid coupling spacer
 If installed, remove the thrust bearing
assembly with the motor stool
 Remove the coupling hubs
 Remove stuffing box and Mechanical seal (or
packing seal) completely. Protect the shaft
against damage while lifting the discharge
head
 Lift the pump just enough to access the first
column pipe flange connection. Refer back to
section 2.3.4
 Support the entire pump just below the first
column pipe joint
 Disconnect the discharge head and lift. Refer
back to section 2.3.1
 Now lift the pump again by using column pipe
flange and disconnect the first section of
column piping
 Remove shaft couplings and repeat the
process until all column piping is
disassembled
 Last step is to lift and remove the bowl
assembly. Refer back to section 2.3.2
6.7.2 Pump dismantling instructions
If the pump has dismantled fully assembled, proceed
as follow:
a) If installed, unbolt and remove complete thrust
bearing assembly . At this point if it's desirable to
dismantle the bearing assembly, proceed as
follow:
 Remove rotor adjusting nut and key
 Remove thrust bearing fan security grid and
cooling fan
 Remove thrust bearing cover deflector.
Unscrew grub screws first.
 Unbolt and remove cover form thrust bearing
housing
 Remove spring and shaft guide sleeve
complete with line bearing, locking nut and
thrust bearing
 Unscrew locking nut and pull out thrust
bearing
 Pull out line bearing
b) If not done previously, remove bolts that secure
motor stool to pump head. Remove motor stool.
c) Remove the pump rigid coupling hub from the
pump shaft and its key.
If a mechanical seal is installed, remove the
mechanical seal cartridge.

For details on the dismantling of the
mechanical seal cartridge refer to the seal
manufacturer manual.
If the pump is equipped with packing seal,
remove the packing rings.
d) Remove the stuffing box.
e) Disconnect pump head from top column pipe.
f) Slip pump head off top shaft.
g) Disconnect top column pipe and remove it from
top shaft.
h) Disconnect top shaft from lineshaft proceeding as
follow:
 Remove shaft coupling retaining spirolox ring
 Slide shaft coupling back and remove split
collar
i) Repeat above steps to disconnect all
intermediate column pipes and shafting until case
assembly is reached
6.7.3 Hydraulic section dismantling instructions
Disassembly the case assembly as follow:
a) Disconnect
lower suction case
b) Withdraw form casing pump shaft with impeller.
c) Remove impeller locking nut
d) Remove impeller and key