Flowserve Pump MK3 HSI 4×3-13

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 the oil is free of contaminants

Ensure the oil contains necessary additives

Is the oil a quality mineral oil with rust and oxidation inhibitors?

Measure the current process temperature

Select the appropriate impeller clearance based on temperature

Install a new impeller gasket [4590] if the impeller has been removed

Rotate the bearing carrier [3240] to obtain the proper clearance

Turn the bearing carrier clockwise until the impeller comes into light rubbing contact with the suction cover

Rotate the shaft to determine the zero setting accurately

Record the current bearing housing operating temperature

Is the operating temperature between 80-94°C (175-200°F)?

Stop the pump and lock the motor

Remove the pipe plug from both bearing locations

Apply 17 cm³ (1.0 in.³) of grease to Group 2 inboard bearing

Examine used oil for contaminants

Record the external bearing housing temperature

Is the bearing housing temperature within acceptable limits?

Select the proper oil viscosity based on operating temperature

Fill the bearing housing to the center of the oil sight glass

Is the oil free of water, sediment, resin, soaps, acid, and fillers?

Ensure oil contains rust and oxidation inhibitors

Is synthetic oil lubricant being used?

Is the interval 18 months regardless of operating temperature?

Can the interval be increased to 36 months with ANSI 3A power end?

Record the external housing temperature

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

Is the bearing temperature below 105°C (220°F)?