PA SERIES PUMPS
MR−05740
MAINTENANCE & REPAIR
PAGE C − 16
Slide the shaft and assembled bearings into the in-
termediate bore until the inboard bearing is fully
seated against the bore shoulder. Use caution not
to damage the lip seal on the shaft threads.
When installing the shaft and bearings into
the bearing bore, push against the outer
race.
Never
hit the balls or ball cage.
Apply a light coating of oil to the lip of the outboard
oil seal (12) and press it into the drive flange (9) with
the lip positioned as shown in Figure C−5. The
face of the oil seal should be just flush with the
outer face of the drive flange.
Install the drive flange gasket (16) and secure the
drive flange to the bearing housing with the hard-
ware (14 and 15).
Be careful
not to damage the lip
of the oil seal (12) on the shaft keyway.
Lubricate a new bearing housing O-ring (34) with
grease and install it in the groove in the bearing
housing.
Lubricate the bearings as indicated in
LUBRICA-
TION
at the end of this section.
Seal Reassembly and Installation
(Figures C−5 and C−8)
Clean the seal cavity and shaft with a cloth soaked
in fresh cleaning solvent.
Most cleaning solvents are toxic and
flammable. Use them only in a well ven-
tilated area free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain-
ers.
The seal is not normally reused because wear pat-
terns on the finished faces cannot be realigned
during reassembly. This could result in premature
failure. If necessary to reuse an old seal in an emer-
gency,
carefully
wash all metallic parts in
fresh
cleaning solvent and allow to dry thoroughly.
Handle the seal parts with extreme care to prevent
damage. Be careful not to contaminate precision
finished faces; even fingerprints on the faces can
shorten seal life. If necessary, clean the faces with a
non-oil based solvent and a clean, lint-free tissue.
Wipe
lightly
in a concentric pattern to avoid
scratching the faces.
Inspect the seal components for wear, scoring,
grooves, and other damage that might cause leak-
age. Clean and polish the shaft sleeve, or replace it
if there are nicks or cuts on either end. If any com-
ponents are worn, replace the complete seal;
never mix old and new seal parts
.
If a replacement seal is being used, remove it from
the container and inspect the precision finished
faces to ensure that they are free of any foreign
matter.
To ease installation of the seal, lubricate the O-
rings and bellows with water or a very
small
amount of oil, and apply a drop of light lubricating
oil on the finished faces. Assemble the seal as fol-
lows, (see Figure C−8).
