National Oilwell Varco Sanitary Pump FA1E

Rotate the bearings slowly and check for smoothness and even action.

Is there any doubt concerning the complete serviceability of the bearings?

Inspect the drive shaft for defects

Does the drive shaft need replacement?

Does the stator appear pitted and gouged?

Remove the gland nuts and packing gland from the stuffing box.

Use packing extractors to remove the first two packing rings, the lantern rings, and the last two packing rings.

Inspect the surface of the drive shaft for excessive wear or grooves.

Is the drive shaft worn or grooved?

If the drive shaft is not worn, lubricate the 4 new packing rings with packing grease.

Insert two rings of packing, the lantern ring halves, and the remaining two packing rings onto the shaft.

Measure the rotor crest-to-crest diameter

Enter the standard crest-to-crest diameter value for comparison

Is the measured diameter within 0.010” (.25mm) of the standard value and free of deep nicks, gouges, or other surface defects?

Is the crest-to-crest diameter between 0.011” (.28mm) and 0.050” (1.3mm) under the standard value?

Check the following conditions for rotor renewal by chrome plating

Check all components for wear and tear

Ensure cleanliness during assembly

Handle all components with care

Pack the bearings prior to assembly into the bearing housing

Ensure lubricant completely covers the faces of the bearing races

Adjust gland nuts for a leakage rate of 1 to 2 drops per second

Is the leakage rate within 1 to 2 drops per second after 15 minutes?

Is there excessive leakage from the stuffing box after 15 minutes of operation?

Tighten the gland nuts until a desired leakage rate is obtained

Is zero leakage required and cannot be tolerated?

Consult with Moyno authorized service representative if zero leakage is required