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Shaft Maintenance/Replacement
Maintenance
GENERAL
• Shaft assembly of bearing frame pumps should
be disassembled annually to inspect for worn
parts, cleaning, and re-greasing. More importantly,
the pump’s shaft sleeve and bearings should be
inspected for pitting. Replace worn components as
needed.
PUMP DISASSEMBLY
• Remove packing gland and packing arrangement, if
equipped. (Refer to packing ring replacement)
• Remove pump casing and impeller.
(Refer to impeller replacement)
• Remove seal plate and water slinger.
• Remove outer bearing cap and slide shaft assembly
from bearing bracket.
• Remove inner and outer grease seals from bearing
bracket and bearing cap and discard.
• Clean and inspect all components.
FIGURE 8
SHAFT INSTALLATION
• Thoroughly steam clean or solvent wash the bearing
cavity of bracket to remove old grease and dirt. Check
surface of bracket for cracks, extreme corrosion, or
other defects.
• Install new inner and outer grease seals in the
bearing bracket and bearing cap. Lubricate with oil.
• Pack bearings with a lithium-based NLGI No. 2 extra
pressure ball bearing grease. Force enough grease
into each bearing to fill internal space between the
races.
• Coat the bearing bores of bracket and the inboard
grease seal with oil. Orient shaft assembly in the
direction shown in
FIGURE 8. Slide shaft and
bearing assembly into bearing bracket.
Do not force
together! Slide shaft until the first bearing makes
contact with the bracket. Carefully align bearing with
the bearing bore and press or tap bearing assembly
into place.
Do not use excessive force!
NOTE: Be sure bearing bores and bracket areas
are clean and free of contamination or early bearing
failure may occur.
• Reinstall outer bearing cap and oil seal.
• Apply Loctite
®
Threadlocker Red 271™ or equal
to capscrews. Torque to 50 ft-lb (68 Nm).
• Rotate pump by hand 10-12 rotations.
• Reassemble pump parts and reinstall unit to piping
system.
• To install Shaft Sleeve, refer to Shaft Sleeve/
Installation Replacement procedure.
Shaft
Sleeve
Roller Bearing
Shaft
Ball Bearing
Water Slinger
Shaft Seal
External
Retaining
Ring
6586 0712