13
MAINTENANCE
DISASSEMBLY:
When disassembling pump, have a
piece of cardboard or wooden board ready to
place the different parts on as you work. Do not
pile parts on top of each other. They should be
laid out neatly in rows. The O-ring and gasket
cannot be reused once they are removed. Have
replacement parts ready prior to disassembly.
Disassemble in the order shown below, while
referring to the sectional view in the equipment
catalog. Always disconnect power prior to
dissembling the pump.
1. IMPELLER & VOLUTE:
a) Remove cap screws, volute and gasket.
b) Clean and examine impeller for cracks
or chips, and replace if required. To
remove impeller, place a flathead
screwdriver in the slot at the end of
the shaft to hold the shaft stationary
while unscrewing.
c) Where applicable, check v-ring and
remove if damaged.
2. POWER CORD & MOTOR:
a) Place pump upright on blocks to avoid
resting unit on shaft.
b) Remove pipe plug and drain oil from
housing.
c) Remove gland nut and washer from
the motor housing, and slide power
cord up along with washers and
grommet.
d) Pull cord through and disconnect the
wires from the terminals on power
cord. Be sure to note wire connections
for reassembly.
e) Disconnect cable leads from motor
leads and remove motor housing and
O-ring. Always replace O-ring and
gasket once removed.
f) For single phase motors, check motor
capacitor with an Ohmmeter by first
grounding the capacitor by placing a
screwdriver across both terminals. If
the Ohmmeter reading moves to
infinity then drifts back, the capacitor
is in working condition. Otherwise,
replace the capacitor.
g) Inspect motor winding for shorts, and
check resistance valves. Check rotor for
wear and damages. If rotor or the
stator windings are defective or
damaged, the complete motor must be
replaced.
3. MECHANICAL SEAL:
a) Where applicable, remove seal plate.
b) Carefully remove mechanical seal
without scratching sliding surface
c) Inspect for signs of uneven wear
pattern on stationary members, chips
and scratches on either seal faces.
Replace the complete seal if any part is
damaged. DO NOT interchange seal
components. Replace the entire shaft
seal.
4. BEARING:
a) Examine bearing and replace if worn.
Remove bearing from shaft using a
wheel puller, if replacement is
required.
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