Gorman-Rupp Pumps T6A60S-5.7 NG-ESP All serial numbers - Manual (Page 45)

OM-06610 SUPER T SERIES
MAINTENANCE & REPAIR PAGE E - 18
shaft (15) with the “V” notch positioned over the
shaft key.
With the impeller rotation still blocked, see Figure 9
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 9. Loosening Impeller
Rotating Assembly Removal
(Figure 4)
Remove the hardware (7 and 8) securing the rotat­
ing assembly to the pump casing. Separate the ro­
tating assembly by pulling straight away from the
pump casing. Tie and tag the rotating assembly
shims (2) for ease of reassembly.
NOTE
An optional disassembly tool is available from the
factory. If the tool is used, follow the instructions
packed with it. A similar tool may be assembled us­
ing 1/2‐inch pipe (schedule 80 steel or malleable
iron) and a standard tee (see Figure 10). All threads
are 1/2‐inch NPT. Do not pre‐assemble the tool.
TEE
APPROX. 6 IN.
(152 MM) LONG
APPROX. 14 IN.
(356 MM) LONG
Figure 10. Rotating Assembly Tool
To install the tool, remove the vented plug (9, Figure
5) from the bearing housing, and screw the longest
length of pipe into the vent hole until fully engaged.
Install the tee, and screw the handles into the tee.
Use caution when lifting the rotating assembly to
avoid injury to personnel or damage to the assem­
bly.
Remove the bearing housing O‐ring (13A).
Impeller Removal
(Figure 5)
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 (26); tie and
tag the shims, or measure and record their thick­
ness for ease of reassembly.
Seal Removal
(Figure 5)
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 (6 and
7) and separate the seal plate (3) and gasket (5)