Gorman-Rupp Pumps T4A60S-F3L 1264856 thru 1314224 - Manual (Page 42)

OM-05512 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 4)
Remove the hardware (11 and 12, Figure 3) secur­
ing the rotating assembly to the pump casing. Sep­
arate the rotating assembly by pulling straight
away from the pump casing. Tie and tag the rotat­
ing assembly shims (33) 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 7). 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 7. Rotating Assembly Tool
To install the tool, remove the vented plug (8, Figure
4) 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 seal plate and bearing housing O‐
rings (30 and 31).
Impeller Removal
(Figure 3)
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 (29); tie and
tag the shims, or measure and record their thick­
ness for ease of reassembly.
Seal Removal
(Figure 3)
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.