4. If the seal is lubricated with filtered fluid, clean
the filter frequently.
outlined in the manufacturers manual. Table 6-2 is a
recommended maintenance timetable for use in
keeping a pump at maximum operating capacity with a
minimum amount of downtime.
Equipment cannot operate well without proper
Q5. The locations in a pump where fluid enters
care. To keep the pump at top efficiency, follow the
(suction) and leaves (discharge) are known by
recommended installation and servicing procedures
what other term?
Table 6-2.Maintenance Timetable
Check bearing temperature with a thermometer, not by
hand. If bearings are running hot (over 180°F), it may be the
result of too much lubricant. If changing the lubricant does
not correct the condition, disassemble and inspect the
Every 3 Months
Check grease-lubricated bearings for saponification. This
condition is usually incurred by the infiltration of water or
other fluid past the bearing shaft seals and can be noticed
immediately upon inspection, since it gives the grease a
whitish color. Wash out the bearings with a clean industrial
solvent and replace the grease with the proper type as
Check the packing and replace if necessary. Use the grade
recommended. Be sure the seal cages are centered in the
stuffing box at the entrance of the stuffing box piping
Every 6 Months
Check shaft or shaft sleeve for scoring. Scoring accelerates
Check alignment of pump and motor. Shim up units if
necessary. If misalignment recurs frequently, inspect the
entire piping system. Unbolt piping at suction and discharge
flanges to see if it springs away, thereby indicating strain on
the casing. Inspect all piping supports for soundness and
effective support of load.
Remove the rotating element. Inspect thoroughly for wear,
and order replacement parts if necessary.
Check wearing clearances.
Remove any deposit or scaling. Clean out stuffing box
Measure total dynamic suction and discharge head as a test
of pipe connection. Record the figures and compare them
with the figures of the last test. This is important especially
where the fluid being pumped tends to form a deposit on
internal surfaces. Inspect foot valves and check valves,
especially the check valve which safeguards against water
hammer when the pump stops. A faulty foot or check valve
will reflect also in poor performance of the pump.