Gorman-Rupp Pumps PAV3A60C-B 1511107 and up - Manual (Page 32)

PA SERIES OM-06525
MAINTENANCE & REPAIR PAGE E - 12
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.
Disengage the hardware (34 and 35, Figure 2) se­
curing the pump casing (1, Figure 1) to the rotating
assembly (2, Figure 2). Separate the pump casing
from the rotating assembly by pulling the casing
straight away. Use a soft‐faced mallet to tap on the
pump casing as necessary to separate the compo­
nents. Remove and discard the O‐ring (36).
Draining Oil From Seal Cavity
(Figure 3)
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 large, clean container under the seal
cavity drain plug (16B). Remove the plug and drain
the oil from the seal cavity into the container. For
shorter drain time, remove the vented plug (17).
Clean and reinstall the drain plug and vent plug. In­
spect the oil for water, dirt or a cloudy condition
which could indicate seal failure.
Impeller Removal
(Figure 3)
Immobilize the impeller (21) with a strap wrench
and use an impact wrench to remove the impeller
screw and washer (23 and 24). 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 (31).
Remove the impeller adjusting shims (20); 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.
An alternate method of removing the stationary
seal components is to remove the flat head caps­
crews (22) and slide the seal plate off the shaft (3).
Remove the O‐ring (38) from the seal plate shoul­
der.
Position the seal plate on a flat surface with the im­
peller side Use a wooden dowel or other suitable
tool to press on the back side of the stationary 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.
Removing Air Compressor Assembly
(Figure 2)
Further pump disassembly requires removal of the
air compressor assembly (26). Disengage the
hardware (10 and 29) and remove the guard (28).
Remove the hardware (10 and 30) and use a pry
bar to raise the air compressor high enough to re­
move the spacers (42). Remove the belt (27) from
the air compressor drive pulley (18, Figure 4).
Disengage the hardware (32 and 33) and remove
the U‐bolt (31).
Disconnect all hoses and fittings from the air com­
pressor and use a suitable hoist and sling to re­
move the air compressor assembly.