8
G5: PREVENTIVE MAINTENANCE
Proper preventive maintenance consists of maintaining
records of operation hours, operating data, gauge readings, and
service performed on the pump. Using this information in con-
junction with the suggested preventive maintenance schedule
below will reduce downtime and prevent costly breakdowns.
FREQUENCY OF
INSPECTION
COMPONENT
INSPECTION AND MAINTENANCE
Weekly
Driver Motor
Clean oil, dust, water and chemicals from the exterior of motor. Make sure motor air intake and outlets
(fan cooled motor) are unobstructed.
Monthly
Driver Motor
Check motor bearing temperature with temperature indicator (not your hand). If bearings are running
hot, consult motor manufacturer’s instructions.
Packing Gland
Grease with modest amount of packing lubricant.
Every 3 Months
(2000 operating hours)
Packing Gland
Inspect packing and replace if necessary.
Top Shaft
Check the shaft. Scoring accelerates wear on packing. Repair or replace top shaft if scoring is evident.
Semi-annually
(4000 operating hours)
Pump
Check operating vibration of the pump and compare to vibration check taken during initial inspection. If
vibration has changed, shut down pump and inspect bowl assembly for damage or clogging.
Pump
Foundation
Check foundation for settling. It may cause misalignment of pump and strain on discharge and suction
piping. Correct for any change in foundation.
Pump
Performance
Check discharge and suction pressure readings against initial field test and correct by adjusting impel-
lers if performance has dropped in excess of 10%.
Annually
Packing Gland
Remove by-pass piping from packing gland and check for scaling and deposits that restrict flow.
Replace piping.
Pump Efficiency
Measure total dynamic head and flow. Take power readings. Compare with initial record of pump effi-
ciency. If efficiency has decreased more than 5%, re-adjust impellers. If performance does not improve,
replace impeller or wear ring as required.
Suction Bowl
Bearing
Repack suction bell bearing if pump is short coupled or booster can type and supplied with grease line
to suction bearing.
Caution: Use non-soluble grease. DO NOT overgrease, which can push shafting up and alter impeller
setting.
PREVENTIVE MAINTENANCE INTERNAL INSPECTION CHART
