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3 Pump Preparation

3.1 Check the condition of the bearing assembly and axial shaft

movement.

 3.1.1 Checkradialshaftmovementwithadialindicatorbyforcing

  theshaftupanddownandobservethemovementofthe 

dial indicator. Replace or repair bearing assembly if the

  movementisgreaterthanthemanufacturer'sspecications

or 0.381 mm (0.015 inch).

 3.1.2 Shaftrun-outshouldbelessthan0.127mm(0.005inch). 

  Turntheshaft360degreesandobservethemovement 

  ofthedialindicator.SeeFigure1.

Radial Shaft Movement Figure1

0.381 mm

(0.015 inch)

Maximum

Axial Shaft Movement Figure2

 3.1.3 Axialshaftmovementmustbelessthan0.381mm 

  (0.015inch).Adjustthebearingcovershimthickness 

  accordingtothemanufacturer'sinstructions.Ifspring 

  loadedsphericalthrustbearingsareutilized,itmaybe 

necessary to machine the gasket surface of the bearing

  coverinlieuofaddingshims.SeeFigure2.

0.381 mm

(0.015 inch)

Maximum

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