Gorman-Rupp Pumps PA6C60-4045H 1416490 thru 1485125 - Manual (Page 38)

PA SERIES OM−06081
MAINTENANCE & REPAIR PAGE E − 18
Impeller Removal
(Figure 5)
With the rotating assembly removed from the
pump casing, unscrew the impeller (1) in a coun-
terclockwise direction (when facing the impeller).
Use caution when unscrewing the impeller; ten-
sion on the shaft seal spring will be released as the
impeller is removed. Inspect the impeller and re-
place if cracked or badly worn.
Remove the impeller adjusting shims (31); tie and
tag the shims, or measure and record their thick-
ness for ease of reassembly.
Seal Removal
(Figures 5 and 10)
Remove the spring centering washer and seal
spring. Slide the shaft sleeve (32) and rotating por-
tion of the seal (consisting of the bellows, retainer,
and rotating element) off the shaft as a unit.
Apply oil to the sleeve and work it up under the rub-
ber bellows. Slide the rotating portion of the seal off
the sleeve.
Slide a pair of stiff wires with hooked ends along
the shaft and hook the stationary seat from the
back side. Pull the stationary seat and O-ring from
the seal plate.
An alternate method of removing the stationary
seal components is to remove the hardware (19
and 20) and separate the seal plate from the bear-
ing housing (4). Position the seal plate on a flat sur-
face 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 and O-ring
can be removed.
Remove the seal plate O-ring (37).
Remove the seal sleeve O-ring (30).
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 (26) and
drain the lubricant. Clean and reinstall the drain
plug.
Disengage the hardware (15 and 16) and remove
the drive flange (9), gasket (17) and oil seal (12).
Use a suitably sized dowel to press the oil seal from
the drive flange.
Place a block of wood against the impeller end of
the shaft (11) and tap the shaft and assembled
bearings from the intermediate. Press the inboard
oil seal (18) out of the bearing housing.
Remove the bearing housing O-ring (36).
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