Gorman-Rupp Pumps T8A60S-F6L 1318431 and up - Manual (Page 40)

OM−05517 SUPER T SERIES
MAINTENANCE & REPAIR PAGE E − 12
Turn
Counterclockwise
Lathe Dog Arm
V" Notch
Shaft Key
Impeller Shaft
Lathe Dog
Setscrew
Heavy
Bar Stock
Figure 6. Loosening Impeller
Rotating Assembly Removal
(Figure 3)
To ease removal of the rotating assembly, it is rec-
ommended that the pump be positioned on sup-
porting blocks with the suction head opening
down and the drive flange (15, Figure 4) up.
Remove the outer hardware (15 and 16) from the
casing ring (14). Install three of the outer cap-
screws in the jacking holes in the casing ring, and
use them to jack the rotating assembly loose from
the pump casing.
After the rotating assembly is loosened, remove
the jacking screws from the casing ring. Remove
the inner hardware (17 and 18) and shim sets (13).
Separate the casing ring from the pump casing. Tie
and tag the shim sets for ease of reassembly.
Install hooks in the mounting holes in the drive
flange (15, Figure 4) and attach the hooks to a
three-legged sling and suitable lifting device. Care-
fully lift the rotating assembly out of the pump cas-
ing far enough to reach inside the casing and re-
move the seal plate O-ring (20). With the O-ring re-
moved, the rotating assembly can be easily re-
moved from the casing using the lifting device.
Move the rotating assembly to a suitable work area
for further disassembly.
Impeller Removal
(Figure 4)
With the rotating assembly removed from the
pump casing, unscrew the impeller from the shaft.
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 (29); tie and
tag the shims, or measure and record their thick-
ness for ease of reassembly.
Seal Removal
(Figure 4)
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.
An alternate method of removing the stationary
seal components is to remove the hardware (5 and
6) and separate the seal plate (3) and gasket (4)
from the bearing housing (7). 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 re-
moved.
Remove the shaft sleeve O-ring (30).
If no further disassembly is required, refer to Seal
Installation.
Shaft and Bearing Removal and Disassembly
(Figure 4)
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.