Gorman-Rupp Pumps 86A2-4024H 1535998 and up - Manual (Page 31)

80 SERIES OM-06413
MAINTENANCE & REPAIR PAGE E - 12
Heat the bearings to a uniform temperature no
higher than 250
_ F (120_ C), and slide the in­
board and outboard bearing cones onto the shaft
with the high side of the tapered roller bearings to­
ward the lubrication cavity. This should be done
quickly, in one continuous motion, to prevent the
bearings from cooling and sticking on the shaft.
After the bearing cones have been installed and al­
lowed 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 bearing cones on the shaft.
When installing the bearings onto the
shaft, never press or hit against the rollers
or roll cage. Press only on the inner race.
Pack the bearing cups and cones with No. 0 lithium
base grease.
Press the bearing closure (33) and inboard bearing
cup (31) into the intermediate until seated squarely
against the intermediate shoulder.
When installing the bearing cups into the
bearing bore, push against the outer race.
Never hit the rollers or roll cage.
Slide the shaft and assembled bearing cones into
the intermediate bore until the inboard bearing
cone (32) fully engages the inboard bearing cup.
Press the outboard bearing cup (26) over the out­
board bearing cone (27).
Install the same thickness of bearing adjusting
shims (30) as previously remove, and secure them
with the bearing cap (28) and hardware (22 and
23).
NOTE
Shaft endplay should be between .003 and .005
inch (0,08 to 0,13mm). Add or remove bearing
shims to establish the correct endplay.
Lubricate the bearings as indicated in LUBRICA­
TION at the end of this section.
Seal Reassembly and Installation
(Figures 3 and 6)
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 spacer sleeve, or re­
place it if there are nicks or cuts on either end. If any
components 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 pack­
ing rings and seal liner with water or a very small