Gorman-Rupp Pumps S8B1-E100 460/3 1432260 and up - Manual (Page 33)

OM-06259 S SERIES PUMPS
PAGE E - 7 MAINTENANCE AND REPAIR
disturbed. Repair gaskets and O‐rings are listed in
the Parts List.
PUMP END DISASSEMBLY
Strainer Removal
(Figure E-1)
To remove the strainer assembly (5), raise the
pump slightly, or lay it on its side and disengage
the hardware (55 and 57) securing the strainer and
base plate (56) to the diffuser (1). If the impeller (2)
is clogged, the debris can usually be removed
without further disassembly.
Draining Oil From Seal Cavity
(Figure E-1)
If any further disassembly is to be performed on the
pump, the seal oil cavity must be drained.
Let the pump cool before removing the
seal cavity drain plug. Pressure built up
within a hot pump could cause the oil to
spray out when the plug is removed. Re­
move the plug slowly and permit pressure
to vent to atmosphere.
Lay the pump on its side with the pipe plugs (9 and
10) facing up. Clean any dirt from around the
plugs. Remove the seal cavity drain plug (9), and
install a short 3/8‐inch NPT nipple in the hole. Tip
the pump and drain the seal oil into a clean con­
tainer. Inspect the oil for water, dirt, or cloudy condi­
tion which could indicate lower seal failure or poor
gasket seal.
Draining Oil From Motor Cavity
(Figure E-1)
If motor problems are suspected, remove the mo­
tor cavity drain plug (10), and install a short nipple
in the hole. Tip the pump and drain the motor oil
into a clean container. Inspect the oil for dark color
which could indicate motor overheating, water or
dirt contamination. The presence of dirt or water
could indicate a breakdown in the waterproof in­
tegrity of the motor cavity, probably due to poor
gaskets or seals.
Positioning Pump For Disassembly
(Figure E-1)
It is recommended that the pump be positioned
upside‐down during disassembly. To hold the
pump in the inverted position, rest the pump se­
curely on blocks. Be careful not to damage the ter­
minal housing and cable assembly (36) while in
this position. Use adequate equipment and per­
sonnel to safely handle the pump until it is secured.
If inverting the pump is not practical, lay the pump
on its side and secure it to prevent rolling.
Suction Head And Diffuser Removal
(Figure E-1)
Remove the hardware (59 and 60) securing the
suction head (61) to the diffuser (1). Pull the suction
head from the diffuser and remove the suction
head gasket (6). Remove the hardware (52, 53 and
54) securing the diffuser (1) to the intermediate
(48). Tap around the parting surfaces with a soft‐
faced mallet and separate the assemblies. Re­
move and discard the diffuser gaskets (7 and 50).
Inspect the wear ring (64) for excessive wear or
scoring and replace as required. The wear ring is a
press fit into the suction head. To remove the wear
ring, drill two small holes horizontally through the
ring 180
_ apart. Use a small chisel or mechanical
cutting device to complete the cuts through the
wear ring.
Use caution not to damage the suction
head when removing the wear ring.
Impeller Removal
(Figure E-1)
NOTE
The impeller hub is drilled and tapped with two 3/8
- 16 UNC screw holes for use with an impeller pull­
er (not furnished) if desired.
Insert a 3/4 inch square X 36 inch long (19,1 mm
square X 914,4 mm long) rod between the vanes of
the impeller (2) to prevent impeller rotation. Re­
move the impeller nut (63) and washer (62). Screw
the impeller knocker (not shown, supplied with
pump) onto the rotor shaft.