Gorman-Rupp Pumps T8A65S-B /F,/FM - Manual (Page 30)

OM-05498 SUPER T SERIES
MAINTENANCE & REPAIR PAGE E - 8
they are heavy enough for safe use and will not
damage the pump.
After the rotating assembly is loosened, screw a
5/8-18 UNF X 16‐inch long threaded rod into the
impeller shaft. Support the drive end with another
set of handles, or a length of pipe (1-13/16 inch
[46 mm] minimum I.D.), and slide the complete ro­
tating assembly through the back cover opening
(see Figure 4). Move the rotating assembly to a
clean work area before proceeding with disassem­
bly.
ADD PIPE
AS REQUIRED
Figure 4. Rotating Assembly Removal
Remove the seal plate and bearing housing O‐
rings (20 and 21).
Impeller Removal
(Figure 2)
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 seal spring will be released as the im­
peller is removed. Inspect the impeller and replace
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
(Figure 2)
Slide the 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.
If no further disassembly is required, refer to Seal
Installation.
Shaft and Bearing Removal and Disassembly
(Figure 2)
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.