Gorman-Rupp Pumps T10A60S-6068T 1268074 and up - Manual (Page 41)

OM−05521 SUPER T SERIES
MAINTENANCE & REPAIR PAGE E − 13
shaft (18) with the V" notch positioned over the
shaft key.
With the impeller rotation still blocked, see Figure 6
and use a long piece of heavy bar stock to pry
against the arm of the lathe dog in a counterclock-
wise direction (when facing the drive end of the
shaft). Use caution not to damage the shaft or key-
way. When the impeller breaks loose, remove the
lathe dog, key and wood block.
NOTE
Do not remove the impeller until the rotating assem-
bly has been removed from the pump casing.
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 (14, Figure 4) up.
Remove the outer hardware (17 and 18) from the
casing ring (16). 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 (19 and 20) and shim sets (22).
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 (14, 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 (23). 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 And Wear Plate Removal
(Figure 4)
Unscrew the impeller from the shaft in a counter-
clockwise direction (when facing the impeller). Use
caution when unscrewing the impeller; tension on
the shaft seal spring will be released as the impeller
is removed.
Remove the impeller adjusting shims (33). Tie and
tag the shims or measure and record their thick-
ness for ease of reassembly.
Inspect the wear plate (27) for excessive wear or
scoring and, if replacement is required, remove the
hardware (25 and 26) securing it to the seal plate
(3).
Seal Removal And Disassembly
(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
portion of the seal is to remove the hardware (6 and
7) and separate the seal plate (3) and gasket (4)
from the bearing housing (9). Remove the bearing
housing O-ring (5).
Position the seal plate on a flat surface with the im-
peller side down. Use a wooden dowel or other
suitable tool to press on the back side of the sta-