OM-07264
S SERIES PUMPS
PAGE E - 7
MAINTENANCE AND REPAIR
NOTE
When appropriate recycling facilities are available,
the user should recycle components and fluids
when doing any routine maintenance / repairs and
also at the end of the pump’s useful life. All other
components and fluids shall be disposed of ac
cording to all applicable codes and regulations.
Strainer Removal
(Figure 1)
To remove the strainer (42), raise the pump slightly,
or lay it on its side and disengage the hardware
(44, 45 and 46). Remove the base plate (43),
screen (42) and strainer plate (41). Remove and
discard the strainer plate gasket (5).
Draining Oil From Seal Cavity
(
Figure 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 (6 and
7) facing up. Clean any dirt from around the plugs.
Remove the seal cavity drain plug (6), and install a
short 1/4‐inch NPT nipple in the hole. Tip the pump
and drain the seal oil into a
clean
container. In
spect the oil for water, dirt, or cloudy condition
which could indicate lower seal failure or poor gas
ket seal.
Draining Oil From Motor Cavity
(
Figure 1)
If motor problems are suspected, remove the mo
tor cavity drain plug (7), 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 integrity of
the motor cavity, probably due to poor gaskets or
seals.
Positioning Pump For Disassembly
(Figure 1)
It is recommended that the pump be positioned
upside‐down during disassembly. To hold the
pump in the inverted position, screw a pipe in the
discharge elbow (28) and clamp it in a large vise or
rest the pump securely on blocks. Be careful not to
damage the pressure relief valve (29) and the ter
minal housing and cable assembly (31) 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 Removal
(Figure 1)
Remove the hardware (48 and 49) and separate
the suction head (53) from the intermediate (8). If
the impeller (2) is clogged, the debris can usually
be removed without further disassembly.
Impeller Removal
(Figure 1)
Wedge a block of wood between the vanes of the
impeller (2) and the intermediate studs (47) to pre
vent impeller rotation. Remove the impeller nut (51)
and washer (50). Remove the piece of wood from
between the vanes of the impeller.
Install the impeller puller (supplied with the pump)
and pull the impeller from the rotor shaft. Retain the
impeller key (52). Inspect the impeller for wear or
damage and replace as required.
