Gorman-Rupp Pumps 81 1/2P47A-B 801848 and up - Manual (Page 24)

OM-02163 80 SERIES
MAINTENANCE & REPAIR PAGE E - 5
Inspect the impeller and replace it if cracked or
badly worn. Slide the impeller adjusting shims (15)
off the impeller shaft. Tie and tag the shims, or
measure and record their thickness for ease of
reassembly.
Seal Removal
(Figures 1 and 2)
To remove the seal assembly (3), remove the rotat­
ing seat and element from the impeller cavity. Use a
pair of stiff wires with hooked ends if necessary.
NOTE
The stationary portion of the seal assembly is se­
cured in the intermediate bore with “Loctite 30516
Aviation Gasket Sealant”. The seal cage can be
damaged during removal; only remove the station­
ary seal components if replacement is required.
Pry the remainder of the seal components from the
intermediate as a unit. If the intermeidate is re­
moved, the seal components can be pressed our
from the back of the intermediate.
To remove the intermediate, disengage the hard­
ware (7, 8, 9 and 10) securing it to the mounting
foot (13) and bearing housing and shaft assembly
(12).
Bearing Housing and Shaft Replacement
When properly operated, the bearing housing and
shaft assembly (12) should not require replaee­
ment. The ball bearings are permanently lubri­
cated and sealed to the integral impeller shaft and
bearing housing. If there is evidence of wear or
damage, the complete assembly must be re­
placed; individual parts are not sold separatelly.
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. Clean and polish the seal area of the shaft.
Small nicks and burrs can be removed using a fine
file or emery cloth. If any components are worn, re­
place 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 seal
area of the shaft 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 follows, (see
Figure 2).