OM-05350
SUPER T SERIES
MAINTENANCE & REPAIR
PAGE E - 7
necessary and keep personnel away
from suspended objects.
Use
Only Genuine Gorman-Rupp
re
placement parts. Failure to do so may cre
ate a hazard and damage the pump or di
minish optimal pump performance. Any
such hazard, damage or diminished per
formance is not covered by the warranty.
NOTE
When appropriate recycling facilities are available,
the user should recycle components and fluids
when doing any routine maintenance / repairs and
also at the end of the pump’s useful life. All other
components and fluids shall be disposed of ac
cording to all applicable codes and regulations.
Back Cover And Wear Plate Removal
(Figure 1)
The wear plate (13) is easily accessible and may be
serviced by removing the back cover assembly
(10). Before attempting to service the pump, re
move the pump casing drain plug (16) and drain
the pump. Clean and reinstall the drain plug.
Remove the back cover nuts (23) and pry the back
cover and assembled wear plate from the pump
casing (1).
NOTE
An alternate method of removing the back cover
from the pump casing is to remove the back cover
nuts (23) and two diagonally opposing locking col
lars (21). Install two 1/2-13 UNC x 2‐inch long
screws in the tapped holes in the back cover and
use them to press the back cover out of the pump
casing.
Inspect the wear plate and replace it if badly scored
or worn. To remove the wear plate, disengage the
hardware (14 and 15).
Inspect the back cover O‐rings (8A and 12A) and
replace them if damaged or worn.
Suction Check Valve Removal
(Figure 1)
If the check valve assembly (28) is to be serviced,
remove the check valve pin (29), reach through the
back cover opening and pull the complete assem
bly from the suction flange (26).
NOTE
Further disassembly of the check valve is not re
quired since it must be replaced as a complete unit.
Individual parts are not sold separately.
Rotating Assembly Removal
(Figure 2)
The rotating assembly may be serviced without
disconnecting the suction or discharge piping;
however, the power source must be removed to
provide clearance.
The impeller (1) should be loosened while the rotat
ing assembly is still secured to the pump casing.
Before loosening the impeller, remove the seal cav
ity drain plug (25A) and drain the seal lubricant.
This will prevent the oil in the seal cavity from es
caping when the impeller is loosened. Clean and
reinstall the seal cavity drain plug.
Immobilize the impeller by wedging a block wood
between the vanes and the pump casing, and re
move the impeller capscrew and washer (21 and
22).
Install the shaft key (16). Install a lathe dog on the
drive end of the shaft (17) with the “V” notch posi
tioned over the shaft key.
With the impeller rotation still blocked, see Figure 3
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.
