Model: PWD Rev. B_12/2/2015
Drain fluids from pump and bearing
housing that is to be removed. Use
proper precautions for hazardous or
flammable liquids. Remove constant
oiler globes. Refer to applicable
MSDS sheets as necessary.
2) Remove
coupling
guard.
3) Remove RTD probes, as these protrude
into the bottom half of the bearing shell.
4) Disconnect and remove proximity
probes and vibration monitors as
necessary, or applicable.
5) Remove pump coupling hub. Normal
standard shaft extensions have a 1 1/4”
taper per foot on diameter taper. Loosen
the set screw in the nut face. Back the
coupling nut off a few rounds. A puller
may be used to put pressure on the
coupling hub, and with a soft or brass
hammer, a mild bump on the back
shoulder should disengage the taper fit.
Be careful not to damage back fit on
gear shroud couplings.
6) Remove bearing housing top half.
7) Disconnect drain and inlet lines as
applicable.
8) Remove screws in sleeve bearing top.
Pull top half of the bearing off. By lifting
up on the shaft, the lower half of the
bearing can be rolled out. Be extremely
careful not to damage sleeve bearing
journal, as this will adversely affect the
bearing life, and could result in damage
to pump internals.
9) Remove lower bottom half bearing
housing.
10) Remove the bearing isolator and oil
rings from the shaft. The seal is now
accessible. Remove and replace per
seal manufacturer’s instructions. Inspect
oil rings to ensure round and no
damage. Replace as necessary.
11) After installation of seal, reverse order of
assembly per above. Seal should be set
after reinstallation of the housing and
bearing. Manually oil bearings prior to
rotation.
12) Ensure all guards are installed prior to
operation.
13) After re-pressurization of the casing and
during startup of the unit, monitor seals
for leaks and take corrective actions if
leaks occur.
SLEEVE – BALL THRUST BEARING HOUSING (OUTBOARD)
A. Follow all Lockout/Tag Out Procedures
prior to removal of guards and
maintenance of unit.
a. Ensure
ALL
electrical sources
have be de-energized and
locked out.
b. Ensure suction, discharge, and
bypass valves have been closed
and secured.
c. Drain fluids from pump and
bearing housing that is to be
removed. Use proper
precautions for hazardous or
flammable liquids. Remove
constant oiler globes. Refer to
applicable MSDS sheets as
necessary.
B. Remove coupling guard, as necessary
for rotating shaft.
C. Remove RTD probes, as these protrude
into the bottom half of the bearing shell.
D.
Disconnect and remove proximity
probes and vibration monitors as
necessary, or applicable.
E. Remove bearing housing top half.
F. Disconnect drain and inlet lines as
applicable.
G. Pull outboard bearing cover.
H. Remove screws in sleeve bearing top.
Pull top half of the bearing off. By lifting
up on the shaft, the lower half of the
bearing can be rolled out. Be extremely
careful not to damage sleeve bearing
journal, as this will adversely affect the
bearing life, and could result in damage
to pump internals.
I. Back off set screws as necessary on
thrust bearing nut. Remove nut and
bearing retaining band. Bearing nuts
come off the direction the unit turns. Pull
thrust bearing. Thrust bearing should be
replaced new – especially if shaft is an
interference fit to the inner bearing race.
Do not loose shim between the bearing
and shaft shoulder! This shim is used to
center the rotating assembly to the
internal components. Failure to re-install
this shim could result in severe damage.
J. Remove lower bottom half bearing
housing.
K. Remove the bearing isolator and oil
rings from the shaft. The seal is now
accessible. Remove and replace per
seal manufacturer’s instructions. Inspect
oil rings to ensure round and no
damage. Replace as necessary.
Содержание PWD
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