Gorman-Rupp Pumps 86A2-F4L 1242877 thru 1322537 - Manual (Page 30)

OM--00957 80 SERIES
MAINTENANCE & REPAIR PAGE E -- 9
Shaft and Bearing Removal and Disassembly
(Figure 2)
When the pump is properly operated and main-
tained, the intermediate should not require disas-
sembly. Disassemble the shaft and bearings only
when there is evidence of wear or damage.
Shaft and bearing disassembly in the field
is not recommended. These operations
should be performed only in a properly-
equipped shop by qualified personnel.
Disengage the hardware (22 and 23), and remove
the bearing cap (28) and shims (30). Tie and tag
the bearing shims, or measure and record their
thickness for ease of reassembly.
Place a block of wood against the impeller end of
the shaft (24), and tap the shaft and assembled
bearings from the intermediate.
Be careful not to
damage the shaft.
NOTE
There are no provisions for draining the grease
from the intermediate cavity. Place a drip pan under
the intermediate before removing the shaft and
bearings.
Remove the outboard bearing cup (26) from the
bearing cone (27).
Place the intermediate on a level surface with the
drive side down, and press the bearing closure
(33) and inboard bearing cup (31) from the inter-
mediate bore.
After removing the shaft and bearings, clean and
inspect the bearings
in place as follows.
To prevent damage during removal from
the shaft, it is recommended that bearings
be cleaned and inspected in place. It is
strongly recommended that the bearings
be replaced any time the shaft and bear-
ings are removed.
Clean the intermediate, shaft and all component
parts (except the bearings) with a soft cloth soaked
in cleaning solvent. Inspect the parts for wear or
damage and replace as necessary.
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.
Clean the bearings thoroughly in fresh cleaning
solvent. Dry the bearings with filtered compressed
air and coat with light oil.
Bearings must be kept free of all dirt and
foreign material. Failure to do so will great-
ly shorten bearing life. Do not spin dry
bearings. This may scratch the rollers or
races, and cause premature bearing fail-
ure.
Rotate the bearings by hand to check for rough-
ness or binding and inspect the bearing rollers. If
rotation is rough or the rollers are discolored, re-
place the bearings.
The bearing tolerances provide a tight press fit
onto the shaft and a snug slip fit into the bearing
housing. Replace the bearing cups or cones, the
shaft, or intermediate if the proper bearing fit is not
achieved.
If bearing replacement is required, use a bearing
puller to remove the inboard and outboard bearing
cones (27 and 32) from the shaft.
Shaft and Bearing Reassembly and Installation
(Figure 2)
Inspect the shaft for distortion, nicks or scratches,
or for thread damage on the impeller end. Dress