12
Disassembly and reassembly
procedures
The procedures outlined in this section cover the
dismantling and reassembly of different types of
Series A-C 2000 close-coupled pumps.
When working on the pumps, use accepted
mechanical practices to avoid unnecessary damage
to parts. Check the condition of all pump parts when
the pump is dismantled and replace if necessary.
General dismantling instructions
1. Disconnect the power source to the driver.
2. Close the suction and discharge valves to isolate
the pump from the system. Turn off liquid supply
and disconnect any piping to the stuffing box.
3. Remove all bolts holding the motor to the
foundation.
Dismantling procedure
Initial disassembly
1. Drain the pump by opening the discharge gauge
tap located directly below the discharge flange and
removing the drain plug (1-910-0) at the bottom
of the casing.
2. Unbolt the motor adapter from the casing by
removing capscrews (1-904-0) and where
applicable clamping lugs (1-937-0). Pull the entire
rotating assembly and motor from the casing
leaving the casing connected to the piping unless it
is to be repaired, replaced, or if applicable , to have
new wear rings installed.
3. Remove the "0" ring (2-914-0) from the stuffing
box cover and inspect for damage. Replace if
necessary.
lmpeller removal
1. Hold impeller by the outside diameter.
2. Remove the impeller nut (4-023-0). To do this,
turn the impeller nut counterclockwise as viewed
from the suction inlet.
3. Pull the impeller (4-002-0) from the shaft and
remove the impeller key (4-911-0). (Figure 5
Impeller Removal)
Figure 5 - Impeller Removal
Figure 6 - Removing Mechanical Seal
Dismantling the stuffing box
A. Pumps with mechanical seals
1. Remove spacer sleeve (1 -154-0).
2. Remove the two nuts holding the gland
(6-014-0) to the stuffing box (2-036-0).
3. Pull the stuffing box cover off the shaft assembly.
NOTE: On the larger Series A-C 2000 pumps, it will
be necessary to remove the capscrews holding the
stuffing box cover to the motor adapter.
NOTE: The mechanical seal (6-400-0) should now be
exposed on the shaft sleeve. (In some cases, the shaft
sleeve may come off the shaft with the stuffing box
cover. If this happens, gently press or pull the shaft
sleeve and mechanical seal from the stuffing box
toward motor side of the stuffing box cover.) This will
expose the mechanical seal as above.
4. Remove the seal from the shaft sleeve, examine
for damage, and if necessary replace.
5. Remove the gland (6-014-0), shaft sleeve
(1-009-0), and the deflector (1-136-0) from
the motor shaft. A puller may be used to
remove the shaft sleeve if it does not slide off
the motor shaft easily.
B. Pumps with packed stuffing box
1. Loosen packing gland (6-014-0) by loosening
the two gland retaining nuts.
2. Pull the stuffing box cover, gland, and packing
from the motor shaft.
3. Remove the two gland retaining nuts and the
gland (6-014-0). Remove the packing rings
(6-924-0) and, where applicable, the seal cage
(6-013-0) from the stuffing box. A standard
packing hook is recommended for removing
the packing and seal cage.
4. Remove the packing base ring.
Motor adapter removal
NOTE: Do not remove the adapter from the motor
unless the motor is to be repaired or replaced. If the
adapter is removed, it will necessitate repositioning
of motor adapter to the motor shaft.
