Gorman-Rupp Pumps PAV3B60C-3TNV70 1433753 and up - Manual (Page 32)

PA SERIES OM-06260
MAINTENANCE & REPAIR PAGE E - 14
Remove the flange (15) and replace the gasket (4).
Pump Casing Removal
(Figure 2)
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.
It is not necessary to remove the suction spool (7)
from the pump casing unless the spool or gasket
(4) requires replacement. To remove the spool, dis­
engage the hardware (5 and 37). See Figure 1, dis­
engage the hardware (27, 28, 29 and 30) and re­
move the pump support bracket (26). Separate the
spool from the pump casing and remove the spool
gasket.
Remove the hardware (34 and 35) securing the
pump casing to the rotating assembly (2). If the
suction spool was not previously removed, remove
the pump support bracket (26, Figure 1) as pre­
viously described. Use the lifting device to pull the
pump casing away from the rotating assembly.
Remove the pump casing O‐ring (36) from the
shoulder on the rotating assembly.
Draining Oil From Seal Cavity
(Figure 4)
If any further disassembly is to be performed on the
pump, the seal oil cavity must be drained to pre­
vent the oil in the seal cavity from escaping as the
impeller is removed.
Position a clean container under the seal cavity
drain plug (17B). Remove the plug and drain the oil
from the seal cavity into the container. For shorter
drain time, remove the vented plug (16). Clean and
reinstall the drain plug and vent plug. Inspect the
oil for water, dirt or a cloudy condition which could
indicate seal failure.
Impeller Removal
(Figure 4)
Use a strap wrench to immobilize the impeller (1)
and remove the impeller screw and washer (32 and
33). Use caution not to damage the impeller with
the strap wrench.
Position two wedges opposite each other behind
the impeller, and tap the wedges carefully in turn
until the impeller comes free of the shaft. Retain the
impeller key (30).
Remove the impeller adjusting shims (3); tie and
tag the shims, or measure and record their thick­
ness for ease of reassembly.
Seal Removal
(Figure 4)
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 flat head caps­
crews (4) and slide the assembled seal plate (5) off
the shaft (29). Remove the O‐ring (6) from the seal
plate shoulder.
Position the seal plate on a flat surface with the im­
peller side down. Use a wooden dowel or other
suitable tool to press on the back side of the sta­
tionary seat until the seat, O‐rings, and stationary
element can be removed.
Remove the shaft sleeve O‐ring (36).
If no further disassembly is required, refer to Seal
Installation.