Gorman-Rupp Pumps PA6C60C-F4L 1318119 thru 1504810 - Manual (Page 40)

PA SERIES OM-05768
MAINTENANCE & REPAIR PAGE E - 18
Turn
Counterclockwise
Lathe Dog Arm
“V” Notch
Shaft Key
Impeller Shaft
Lathe Dog
Setscrew
Heavy
Bar Stock
Figure 9. Loosening Impeller
Pump Casing Removal
(Figure 4)
Support the pump casing using a suitable hoist
and sling.
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.
Remove the hardware (12 and 13) securing the
pump casing (1) to the rotating assembly (2). Pull
the pump casing straight away from the rotating
assembly to prevent binding on the impeller. Re­
move the shims (14) and clean the contacting sur­
faces. Tie and tag the shims or measure and re­
cord their thickness for ease of reassembly.
Impeller Removal
(Figure 5)
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 if cracked or badly worn.
Remove the impeller adjusting shims (30); tie and
tag the shims, or measure and record their thick­
ness for ease of reassembly.
Seal Removal
(Figures 5 and 10)
Remove the spring centering washer and seal
spring. Slide the shaft sleeve (31) 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 (29) and seal plate
O‐ring (38).
If no further disassembly is required, refer to Seal
Installation.