Goulds Pumps 3408 - IOM - Manual (Page 29)

PREVENTIVE MAINTENANCE
3408 IOM 03/99
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GEN ERAL MAIN TE NANCE AND
PE RI ODIC IN SPEC TION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
MAIN TE NANCE TIME TA BLE. . . . . . . . . . . . . . . . . . . . . . . . . 27
MAIN TE NANCE OF FLOODED PUMPS . . . . . . . . . . . . . . . . . . . 28
LU BRI CA TION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Grease Lu bri ca tion of Bear ings . . . . . . . . . . . . . . . . . . . . . . . 28
Pe ri odic Ad di tion of Grease. . . . . . . . . . . . . . . . . . . . . . . . . 29
Bear ing Tem per a ture . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Oil Lu bri ca tion of Bear ings . . . . . . . . . . . . . . . . . . . . . . . . . 29
Cou pling Lu bri ca tion . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
SEALING IN FOR MA TION . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Packing (Non-Asbestos) . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Me chan i cal Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
TROU BLE SHOOT ING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
GENERAL MAINTENANCE & PERIODIC INSPECTION
Operating conditions vary so widely that to
recommend one schedule of preventative
maintenance for all centrifugal pumps is not possible.
Yet, some sort of regular inspection must be planned
and followed. We suggest a permanent record be
kept of the periodic inspections and maintenance
performed on your pump. This recognition of
maintenance procedure will keep your pump in good
working condition, and prevent costly breakdowns.
One of the best results to follow in the proper
maintenance of your centrifugal pump is to keep a
record of actual operating hours. Then, after a
predetermined period of operation has elapsed, the
pump should be given a thorough inspection. The
length of this operating period will vary with different
applications, and can only be determined from
experience. New equipment, however, should be
examined after a relatively short period of operation.
The next inspection period can be lengthened
somewhat. This system can be followed until a
maximum period of operation is reached which should
be considered the operating schedule between
inspections.
MAINTENANCE TIME TABLE
EVERY MONTH
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 or too little lubricant. If
changing the lubricant and/or adjusting to proper level
does not correct the condition, disassemble and inspect
the bearings. Lip seals bearing on the shaft may also
cause the housing to run hot. Lubricate lip seals to
correct this condition.
EVERY 3 MONTHS
Check the oil on oil lubricated units. Check grease
lubricated bearings for saponification. This condition is
usually caused 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 recommended.
EVERY 6 MONTHS
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 connection.
Take vibration readings on the bearing housings.
Compare the readings with the last set of readings to
check for possible pump component failure (e.g.
bearings).
Check shaft or shaft sleeve for scoring. Scoring
accelerates packing wear.
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