Case Study: Reducing Downtime with Preventive Maintenance

The problem

A process facility operated four end-suction pumps, with three in regular service and one standby. The team was experiencing repeated seal leakage, coupling damage and short bearing life. Failures were being repaired quickly, but the same symptoms returned. The plant had spare parts, yet still lost production because maintenance was reactive and inspection records were inconsistent.

What the team found

A basic reliability review identified several contributing factors: piping strain after previous modifications, inconsistent alignment practice, blocked ventilation on one motor, suction strainers cleaned only after performance dropped, and no baseline vibration readings. Spare seals were available, but two elastomer materials had been mixed in the store. The failures were not caused by one defective component; the maintenance system itself needed improvement.

The preventive-maintenance plan

The facility introduced a simple schedule. Operators recorded suction pressure, discharge pressure and visible leakage each shift. Maintenance measured vibration and bearing temperature monthly on the critical pumps. Alignment was checked after seal or motor work. Strainers were inspected based on pressure drop and operating hours. The store separated seal kits by exact pump model and material code.

Corrective work

The most problematic pump was taken out of service for planned maintenance. The base was checked, piping supports were corrected, the coupling was replaced and the motor-pump alignment was set after the piping was connected. The seal flush line was cleaned and the correct seal elastomer installed. A vibration baseline was then recorded for future comparison.

What changed

Within the illustrative twelve-month period, the facility experienced fewer emergency interventions, seal life improved and planned maintenance replaced several breakdown callouts. Equally important, technicians could identify which readings were abnormal because they had baseline data. Management also gained a clearer picture of which spares were actually critical.

Lessons for other facilities

First, repeated component replacement is not a root-cause strategy. Second, operator observations can provide valuable early warning when they are recorded consistently. Third, correct installation and alignment belong inside maintenance, not only commissioning. Finally, spare-parts control is part of reliability: the right component must be available, identifiable and suitable for the service.

A simple starting point

Choose a small group of critical assets. Record current operating condition, create a short checklist, establish baseline vibration and temperature, define inspection intervals, and review every failure for cause. Expand the program only after the first group is being managed consistently.