Gorman-Rupp Pumps T8A60S-4045H 1514489 and up - Manual (Page 40)

OM-06522 SUPER T SERIES
MAINTENANCE & REPAIR PAGE E - 13
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)
Remove the outer hardware (8 and 35) and shims
(34) from the casing ring (37). Tie and tag the shims
for ease of reassembly.
To ease removal of the rotating assembly, it is rec­
ommended that four 1/2-13 UNC-2B by 6‐inch
long capscrews (not supplied) be installed through
the casing ring and into the pump casing at the 10
o'clock, 2 o'clock, 4 o'clock and 8 o'clock posi­
tions. The capscrews will support the rotating as­
sembly and prevent binding as it is removed from
the casing.
Install three of the outer capscrews in the jacking
holes in the casing ring and use them to jack the
rotating assembly loose from the pump casing.
In the following step, support the rotating
assembly as it is removed from the pump
casing to keep it level. Otherwise, it could
slip off the lifting hook and fall, resulting in
damage to the rotating assembly and pos­
sible serious injury to personnel.
After the rotating assembly is loosened, remove
the jacking screws from the casing ring. Carefully
pull the rotating assembly out of the pump casing
until the lifting eye cast into the top of the bearing
housing is accessible. Install a hook or strap
through the lifting eye and use a suitable lifting de­
vice to support the rotating assembly. Remove the
four 6‐inch long capscrews and pull the rotating as­
sembly out of the pump casing until free.
Remove the inner hardware (8 and 36) and sepa­
rate the casing ring from the bearing housing (9,
Figure 4).
Remove the bearing housing and seal plate O‐
rings (2 and 38).
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 (3); 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 (15
and 16) and separate the seal plate (5) and gasket
(6) from the bearing housing (9). 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 (4).
If no further disassembly is required, refer to Seal
Installation.