7
REASSEMBLY
Reassembly will generally be in reverse order of disassembly.
If disassembly was not completed, use only those steps
related to your particular repair program.
1. Position locating pins (67) in lower casing (69), adding
swing bolt pins (68), if used on your pump. Install wearing
ring pins (66). Tap pins gently to seat them in place. If
nameplate (71) was removed, install it with screws (70).
Install O-ring (58) in shaft sleeve (64).
2. On a right-hand unit, thread inboard sleeve (64) onto shaft
(65) distance A (refer to figure 14) based on pump size. On
a left-hand unit, thread outboard sleeve (57) onto the shaft a
distance A (refer to figure 15). When the sleeve is in posi-
tion its keyway should align with keyway on shaft. Coat key
and keyway with Loctite
®
Sealant Grade 242. Insert key
(63) into keyways of shaft and sleeve. Tap it firmly in place.
3. Coat inside diameters of impeller wearing rings (61) (optional)
with Loctite Sealant Grade 271 and press them over hubs of
impeller (59). Do not attempt to hammer impeller wear rings
into position, since they are a press fit. Use of an arbor press is
preferred. However, placing a block of wood over the impeller
wearing ring and pressing it in will work satisfactorily. For
power frames 5, 6B and 7 only, two setscrews (78) will be
installed by drilling into wearing rings and impeller. The
opposite surface of the impeller should be protected from
damage throughout the procedures by resting it against soft
wood on the surface of work bench.
Impeller wearing rings must be given special care be-
cause they are press fit. Be sure rings are positioned
squarely over hubs of impeller. A soft headed hammer
may be used to gently tap impeller wearing rings into
correct alignment before they are pressed into place.
4. Coat impeller (59) keyway with Loctite Sealant Grade 242
and slide onto shaft until it is firmly against the shaft sleeve.
Place O-ring (58) in shaft sleeve (57) and thread shaft sleeve
firmly against the impeller.
NOTE
When assembling rotating element of a 410 Series
pump, it is important that the curve of the impeller
blades is in agreement with pump rotation. Refer to
impeller rotation sketches, Figs. 22–24.
Carefully check that proper shaft sleeve has been keyed
into place for rotation of pump. If correct shaft sleeve is
not keyed onto shaft, it can spin loose during operation
of pump and cause excessive damage.
Carefully check that the proper shaft sleeve has been
keyed into place for rotation of pump. If correct shaft
sleeve is not keyed onto shaft, it can spin loose during
operation of pump and cause extensive damage.
STATIONARY SEAT
WASHER
FLEXIBLE BELLOWS
RETAINER
DRIVE RING
SPRING
Figure 13. Mechanical seal.
CAUTION
CAUTION
CAUTION
MODELS 411-412-413
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