Gorman-Rupp Pumps 03A20-B 751140 and up - Manual (Page 26)

OM-01175 0 SERIES
MAINTENANCE & REPAIR PAGE E - 7
onto the shaft, one at a time, until they are fully
seated. This should be done quickly, in one con­
tinuous motion, to prevent the bearings from cool­
ing and sticking on the shaft.
After the bearings have been installed and allowed
to cool, check to ensure that they have not moved
away from the shaft shoulders in shrinking. If
movement has occurred, use a suitably sized
sleeve and a press to reposition the bearings
against the shaft shoulders.
If heating the bearings is not practical, use a suit­
ably sized sleeve and an arbor (or hydraulic) press
to install the bearings on the shaft.
When installing the bearings onto the
shaft, never press or hit against the outer
race, balls, or ball cage. Press only on the
inner race.
Secure the outboard bearing to the shaft with the
retaining ring (28).
Lubricate the lip seal area of the shaft, and slide the
shaft and assembled bearings into the pedestal
until the inboard bearing seats against the inboard
bearing cap. Use caution not to roll or cut the lip of
the oil seal (20).
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Install the complete set of gasket/shims (24) on the
pedestal side of the bearing retaining ring with the
split at the 12:00 position.
Press the oil seal (29) into the bearing cap (27) with
the lip positioned as shown in Figure 1. The face of
the oil seal should be flush with the outside of the
bearing cap.
Slide the bearing cap and oil seal onto the shaft,us­
ing caution not to roll or cut the lip of the oil seal on
the shaft keyway. Secure the bearing cap to the
pedestal with the hardware (24 and 26).
Install the slinger ring (16).
Lubricate the bearing housing as indicated in LU­
BRICATION.
Seal Reassembly and Installation
(Figures 1 and 2)
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. If any components are worn, replace the com­
plete 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 bel­
lows and O‐rings with water or a very small
amount of light lubricating oil, and apply a drop of
light lubricating oil on the finished faces. Assemble
the seal as follows, (see Figure 2).