Flowserve Pump MK3 HSI 3×2-8

Check for contaminants in the bearing housing

Drain the oil from the bearing housing

If contaminated, describe the cause and corrective actions taken

Ensure the work area is clean and free from dust, dirt, oil, grease

Use non-flammable, non-contaminated cleaning fluids

Record external housing temperature

Is the lubricant Mobil DTE heavy/medium or equivalent?

Record the bearing lubricant level

Enter the remaining hours before a lubricant change is required

Is the oil level within the circumference of the center hole of the sight glass?

Is oil visible in the constant level oiler bottle at all times?

Check and fill the oil level when the pump is not operating

Ensure all parts are thoroughly cleaned and inspected

Use new bearings, O-rings, gaskets, and lip seals

Replace any parts showing wear or corrosion with new genuine Flowserve parts

Measure shaft runout and ensure it is 0.025 mm (0.001 in.) FIM or less

Check radial deflection — static and ensure movement is not more than 0.05 mm (0.002 in.)

Verify axial shaft movement (endplay) on a Durco pump is 0.03 mm (0.001 in.) or less

Ensure seal chamber face squareness run-out is less than 0.08 mm (0.003 in.)

Check seal chamber register concentricity is less than 0.13 mm (0.005 in.)

6.1 Maintenance schedule / 4.8 Final shaft alignment check

Check coupling alignment and re-align if necessary.

Operate the pump for at least an hour or until it reaches final operating temperature.

Shut the pump down and recheck alignment while the pump is hot.

Did piping thermal expansion change the alignment?

Measure parallel misalignment (should be no more than 0.05 mm or 0.002 in.).

Measure angular misalignment (should be no more than 0.0005 mm/mm or 0.0005 in./in.).

Place an indicator on the coupling, reading in the vertical direction, and measure movement when any driver fastener is loosened (should not indicate more than 0.05 mm or 0.002 in.).