Maintenance
Model 3410 Installation, Operation, and Maintenance Manual
62
Group
Instructions
M, X, XL
Use a split-jaw puller on the back of the bearing (168 and 112).
Make sure not to damage the bearings. If the bearing needs to be reinstalled, then protect it
from contamination by wrapping it in clean cloth or paper.
4. For L and XL groups only, remove the radial bearing spacer (443T).
5. Remove the gaskets (360), bearing end covers (109), and deflectors (123).
6. Remove the outboard seal (332) from the coupling-end bearing housing, and remove the
inboard seal (333) from each end cover (109).
You can discard the old bearings and gasket.
Remove the seals
1. Do one of the following:
• If the pump has mechanical seals, then slide the glands with the stationary seat in
place off the shaft. Make sure not to damage the lapped seal faces.
• If the pump has packed stuffing boxes, then remove the nuts (355), gland (107),
packing (106), lantern rings (105), and stuffing box bushings (125).
2. Slide the casing wear ring (103) off the impeller and shaft.
3. Remove the rotating portion of both seals.
Remove the shaft sleeve
NOTICE:
Do not remove the optional shaft sleeve on S group pumps unless you intend to replace it.
1. Remove the shaft sleeve as follows:
When you remove the sleeve (126), use a very fine emery cloth to smooth the shaft in order
to prevent binding.
Group
Instructions
S
1.
Loosen the sleeve (126) with low heat, approximately 350–400°F
(177–222°C). Use a temperature stick or other measuring device to
monitor the temperature.
2.
Apply torque with a strap wrench.
3.
Slide the sleeve carefully off the shaft.
M, L, XL
1.
Loosen the setscrew (222B) on the sleeve nut (124).
2.
Use a spanner or strap wrench to unscrew the sleeve nut (124).
3.
Remove and discard the O-rings (497).
4.
Carefully slide the sleeve (126) off the shaft.
5.
Remove and discard the sleeve-to-impeller gasket (428) located on the
end of the sleeve nearest the impeller.
Remove the impeller
CAUTION:
Do not damage the impeller hub surface that is sealed by the sleeve gasket.
1. Do one of the following:
Group
Instructions
S
1.
Use snap ring pliers to remove the retaining rings (361H).
2.
Drive or press the impeller (101) off the shaft.
3.
Remove the key (178).
See the Retaining ring configuration in the Parts Listings and Cross-
sectional Drawings chapter for an illustration of the S group retaining ring
configuration.
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