Flowserve Pump MK3 HSI 1.5×1-8

Record the bearing housing operating temperature

Is the bearing housing operating temperature within the specified range?

Record the external housing temperature

Is the external housing temperature within the maximum limit?

Oil Specifications and Preparation

Check for contaminants in the bearing housing

Drain the oil from the bearing housing

Send oil for analysis to check for contamination

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 complying with safety guidelines

Is the bearing housing operating temperature under 71°C (160°F)?

Is mineral oil lubricant being used?

Is the external housing temperature below 82°C (180°F)?

Oil Specifications and Precautions

Ensure oil is free of contaminants

Confirm oil contains rust and oxidation inhibitors

Select the recommended lubricant

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.)

Confirm satisfactory operation by checking the following

Record the surface temperature at the bearings

Is the surface temperature within the acceptable range? (Oil bath: 82°C, Oil mist: 82°C, Grease: 94°C)

Is the bearing temperature below the maximum exposure limit of 105°C?

Ensure overload prevention measures are in place

Perform routine vibration monitoring

Is the environment dirty or dusty?

Remove dirt from areas around close clearances, bearing housings, and motors if necessary