Gorman-Rupp Pumps PA4A60-4024T 1476457 and up - Manual (Page 40)

PA SERIES OM−06415
MAINTENANCE & REPAIR PAGE E − 18
Seal Removal
(Figures 5 and 10)
Slide the integral shaft sleeve and rotating portion
of the seal off the shaft as a unit.
Use a pair of stiff wires with hooked ends to remove
the stationary element and seat from the seal plate
(2).
An alternate method of removing the stationary
seal components is to remove the hardware (6 and
7) and separate the seal plate and gasket (3) from
the bearing housing (11). Position the seal plate on
a flat surface with the impeller side down. Use a
wooden dowel or other suitable tool to press on the
back side of the stationary seat until the seat, O-
rings, and stationary element can be removed.
Remove the shaft sleeve O-ring (26) and seal plate
O-ring (27).
If no further disassembly is required, refer to Seal
Installation.
Shaft and Bearing Removal and Disassembly
(Figure 5)
When the pump is properly operated and main-
tained, the bearing housing should not require dis-
assembly. 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.
Remove the bearing housing drain plug (24) and
drain the lubricant. Clean and reinstall the drain
plug.
Disengage the hardware (13 and 14) and remove
the bearing cap (15), gasket (16) and oil seal (17).
Press the oil seal from the bearing cap.
Place a block of wood against the impeller end of
the shaft and tap the shaft and assembled bear-
ings (19 and 21) from the bearing housing. Press
the oil seal (17A) from the bearing housing.
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 bearing housing, shaft and all compo-
nent 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 balls or
races and cause premature bearing fail-
ure.
Rotate the bearings by hand to check for rough-
ness or binding and inspect the bearing balls. If ro-
tation is rough or the bearing balls are discolored,
replace the bearings.
The bearing tolerances provide a tight press fit
onto the shaft and a snug slip fit into the bearing