OM-07315
ULTRA V SERIES
MAINTENANCE & REPAIR
PAGE E - 8
If removed, install the shaft key (22). Install a lathe
dog on the drive end of the shaft (23) with the “V”
notch positioned 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.
Turn
Counterclockwise
Lathe Dog Arm
“V” Notch
Shaft Key
Impeller
Shaft
Lathe Dog
Setscrew
Heavy
Bar Stock
Figure 3. Loosening Impeller
(Figure 1)
Disengage the hardware (3 and 4) securing the ro
tating assembly to the pump casing and remove
the spacers (5). Separate the rotating assembly by
pulling straight away from the pump casing.
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 4). 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 4. Rotating Assembly Tool
To install the tool, remove the vented plug (10, Fig
ure 2) 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 assem
bly to avoid injury to personnel or damage to the as
sem
bly.
Remove the O‐rings (6 and 7).
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 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 (2); 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 (8 and
