4
MODELS 411 & 481, 412, 413 & 483
8. Remove four capscrews (25) SECURING TWO BEAR-
ING CAPS (26). Lift off bearing caps (26) and pins (27).
Mark caps to insure correct replacement and orientation on
the respective bearing arms.
9. Loosen and remove four nuts (18), washers (19), and gland
clamps (20) securing split halves of two packing glands (21).
Remove four swing bolts (22).
10. Assuming that further work is required on shaft and
impeller assembly use properly secured rope sling and hoist
or crane as requi
red to lift it from casing half (69) and place
it on a suitable bench or work surface.
Take care not to dent or damage impeller and/or other parts.
Use of a supporting cradle or work stand is recommended.
NOTE
Disassembly procedure from this point covers pumps having
standard packing. If pump has mechanical seals, refer to spe-
cific instructions.
11. Remove and discard rings of packing (23). Replacement
with new packing is recommended whenever pump is disas-
sembled.
12. Sli
p off flexible coupling half or spacer coupling and
remove key (24). If preferred, the key may be removed by
carefully tapping it from outer end with a brass drift or similar
non-marring tool, using a small hammer.
13. Remove two casing wearing rings (28)
14. Remove zerks (10) and pipe plugs (12) from cartridge
caps (32 and 42).
15. Loosen and remove four capscrews (31) from cartridge
cap (32). The outboard shaft end protector (29) may be
removed from its recess in the outboard ca
rtridge cap if nec-
essary. Remove retainer ring (35) with a pair of trauarc pliers.
Also remove gasket (34).
NOTE
If the unit has a tandern shaft, protector (29) is not used.
16. Outboard bearing (38) is press fitted into shaft (65). To
remove it, place a puller on bearing cartridge (36) and pull
cartridge, grease seal (37) and bearing from shaft. The grease
seal can be pressed from the bearing cartridge if it needs
replacing, then slide slinger (39), lantern ring (52) and bush
i
ng (56) off shaft (65).
On 6B, 7A and 7 Power Frames remove snap ring (35A) on
inboard side of bearing. Then slide slinger (39), lantern ring
(52), and bushing (56) off shaft.
17. Removal of inboard bearing is basically the same as for
outboard bearing. Remove capscrews (41) and slide slinger
(40), cartridge cap (42), grease seal (43) and gasket (44) off
shaft.
18. Pull or press off bearing cartridge (45), grease seal (46)
and bearing (47). Remove slinger (48), lantern ring (52)
and
bushing (56) from shaft.
19. If pump has right hand rotation, unscrew and remove out-
board sleeve (57) first. (See Note 1) Remove o-ring (58). If
pump has left hand rotation, unscrew and remove inboard
sleeve (64) first. (See Note 1) Remove o-ring (62).
NOTE 1
For Power Series 7A pumps, the sleeve collar (79) must be
removed before the sleeve (57, 64). Loosen setscrews (72)
and use an adjustable head spanner wrench to carefully
unthread the collar (79). The sleeve (57, 64) m
ay then be
directly pulled from the shaft.
20. Key (63) holds impeller (59) and either sleeve (64) if
pump is right hand or sleeve (57) for left hand pump. These
parts can be removed by pulling impeller from shaft (65) and
removing key (63) from its position in keyway and sleeve.
Unscrew and remove remaining sleeve and gasket.
21. Disassemble wearing ring (61) (optional) from impeller
(59) only if necessary. On power frames 5, 6B and 7, remove
setscrews (78). Apply a puller and gr
adually withdraw wear
ing rings (61) from impeller (59). Wearing rings may have to
be cut or trimmed off the impeller. If a lathe is used to trim
rings off, use care not to clamp impeller too tightly and cause
distortion. Also use care not to remove any metal from
impeller.
22. Remove locking and locating pins (66, 67, and 68) from
casing half (69) only if replacement is necessary.
23. Nameplate (71) and its securing screws (70) should only
be removed if replacement is necessary.
2
4. For model 413 & 483 pumps, unscrew capscrews (75) to
remove motor and motor bracket (74) from casing half (69).
The motor can be separated from motor bracket by removing
capscrews (73).
25. If complete removal of pump is required, disconnect the
suction and discharging piping from casing half (69).
Remove nuts from foundation bolts and lift pump casing
half (69) and base (77) out. When the casing half and base
are moved away from the piping, lay them on their side, so
that, by r
emoving capscrews (76), the base can be separated
from casing half (69).
CAUTION
FLEXIBLE CUP
STATIONARY SEAT
WASHER
FLEXIBLE BELLOWS
RETAINER
DRIVE RING
SPRING
Figure 1. Mechanical Seal
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