Gorman-Rupp Pumps PA6C60C-B-E50 460/3 1528569 and up - Manual (Page 43)

PA SERIES OM-06531
MAINTENANCE & REPAIR PAGE E - 16
Turn
Counterclockwise
Lathe Dog Arm
“V” Notch
Shaft Key
Impeller Shaft
Lathe Dog
Setscrew
Heavy
Bar Stock
Figure 8. Loosening Impeller
Pump Casing Removal
(Figure 3)
Position the pump assembly on a flat work surface
with the rotating assembly (2) positioned up. Sup­
port the pump casing (1) using wood blocks or oth­
er suitable material. Make sure the pump assembly
is secure and stable before proceeding with pump
disassembly.
Use lifting and moving equipment in
good repair and with adequate capacity
to prevent injuries to personnel or dam­
age to equipment. If slings or chains are
used to move the pump or components,
make sure that the load is balanced;
otherwise serious personal injury or
death could result. Suction and dis­
charge hoses and piping must be re­
moved from the pump before lifting.
NOTE
Drain the oil from the seal cavity before removing
the pump casing. See Draining Oil From Seal Cav­
ity.
See Figure 4 and install a pair of “S” hooks in two
opposing holes in the mounting flange (9). Con­
nect a sling and suitable lifting device to the “S”
hooks.
Remove the hardware (7 and 12) securing the
pump casing (1) to the rotating assembly (2). Use
the lifting device to pull the rotating assembly up
out of the pump casing and position it on the work
surface. Remove the shims (15) and clean the con­
tacting surfaces. Tie and tag the shims or measure
and record their thickness for ease of reassembly.
Impeller Removal
(Figure 4)
With the rotating assembly removed from the
pump casing, unscrew the impeller (1) in a coun­
terclockwise direction (when facing the impeller).
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 it if cracked or badly worn.
Remove the impeller adjusting shims (28); tie and
tag the shims, or measure and record their thick­
ness for ease of reassembly.
Seal Removal
(Figures 4 and 10)
Remove the spring centering washer and seal
spring. Slide the shaft sleeve (29) and rotating por­
tion of the seal (consisting of the bellows, retainer,
and rotating element) off the shaft as a unit.
Apply oil to the sleeve and work it up under the rub­
ber bellows. Slide the rotating portion of the seal off
the sleeve.
Slide a pair of stiff wires with hooked ends along
the shaft and hook the stationary seat from the
back side. Pull the stationary seat and O‐ring from
the seal plate.
An alternate method of removing the stationary
seal components is to remove the hardware (18
and 19) and separate the seal plate from the bear­
ing housing (4). Position the seal plate on a flat sur­
face 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 and O‐ring
can be removed.
Remove the shaft sleeve O‐ring (27) and seal plate
O‐ring (34).