Flowserve Pump 12-MFC-24

6.7.3 Bearing installation and removal

Ensure proper fit is maintained during bearing installation

Was a pulling device used to remove bearings from the shaft?

Support the bearing cone with a split ring and press out the shaft using an arbor press

Methods for mounting a bearing on the pump shaft

Heat the bearing to a uniform temperature

Quickly mount the heated bearing on the shaft

Apply force using an arbor press if alternate method is used

Use a tubular sleeve, ring, or small blocks to apply force to the cone

Normal Vibration Levels, Alarm and Trip

Measure the vibration velocity of the motor (unfiltered, r.m.s.)

Pump and Motor Bearings Temperature

Record the bearing temperature (t)

Record the ambient temperature (ta)

Estimate the likely maximum ambient temperature (tb)

Calculate the alarm temperature

Ensure safety and availability of parts

6.7.1 Preliminary to dismantling

Isolate motor and lock off electrical supply in accordance with local regulations.

Isolate suction and discharge valves.

Remove coupling guards and disconnect the coupling halves.

Drain pump casing and remove any auxiliary piping if applicable.

Lay out all parts in the order in which they are removed for convenience at re-assembly.

Protect all machined faces against metal-to-metal contact and corrosion.

Measure the current impeller clearance in mm

Is the impeller clearance within the nominal range of 0.25 to 0.50 mm?

Inspect the wearing rings for excessive clearance wear

Has the pump performance decreased appreciably due to excessive wearing ring clearance?

Determine the necessary action based on the inspection results

6.1.7 Maintenance of shaft and shaft sleeve

Examine the shaft condition at the following locations

Is there any rusting or pitting on the shaft?

Are the anti-friction bearings properly fitted to the pump shaft?

Is there any distortion in the shaft keyways?

Is the impeller loose on the shaft?

Is the shaft bent or distorted?

Is the sleeve worn appreciably?

Measure the depth of grooves on the sleeve (in mm)