LCV [en-US]
30
Ensure that the bearing outer diameters and housing bores are clean. Coat shaft between the bearings with GIW Blue
Synthetic Bearing Lubricant then insert the shaft with bearings into the housing from the drive end until thrust bearing
is located against the housing.
The radial bearing outer race must go in straight. A pipe jig may be made for this purpose.
Insert the spacer and cup for the outboard bearing using a rubber mallet.
CAUTION
The bearings should slide easily and fully into the bearing housing without excessive force that would indicate
possible dust or grit between the bearings and the housing, and result in a thrust preloading on the impeller end
spherical roller bearing. Preloading of the bearing will cause it to carry thrust loadings, which would normally be
carried by the taper roller bearing and can result in overheating and premature failure of the spherical roller
bearing.
8.3.4
Installing End Covers and Seals
The standard drive end bearing housing shaft seal is the Inpro VBX type labyrinth seal. Impeller end sealing is
accomplished by Inpro or lip seal.
Prior to installation, press the Inpro shaft seals into each end cover. If possible, use a hand operated arbor press instead
of a hydraulic press to improve control of the pressing operation. You will be overcoming a light interference fit and may
shear off a portion of the outer diameter o-ring, however, this is normal and indicates a secure fit.
Slide end covers with gaskets and Inpro seals over the shaft at each end. Use O-Ring lubricant, Parker O-Lube or
Parker Super-O-Lube to lubricate the inner diameter o-rings against the shaft. Take special care when running the seal
over the shaft keyway to avoid cutting the o-ring. If necessary, lightly file the keyway edges to avoid this problem.
After bolting the end covers in place, rotate the shaft by hand. There should be no frictional contact between the rotating
and stationary parts of the Inpro seal. Any rubbing or axial movement in the seal may indicate misalignment. If this is
the case, tap lightly into alignment.
8.4
Bearing Assembly Mounting
No special torque requirements exist for the mounting nuts and bolts unless specifically called for on the assembly
drawing. Bolts and nuts for which torque is not specified should be tightened enough to ensure a firm mating between
parts in accordance with good maintenance practice. Where possible, the use of an air driven impact wrench is
recommended for bolts over 24mm (1.0 inch) diameter.
Place the support assembly in the horizontal position at a suitable height to facilitate pump assembly.
Set lifting strap at the approximate center of gravity of the bearing assembly, positioning the strap to correctly orient
the bearing housing assembly to the support assembly as shown in the pump assembly drawing.
Clean the interfacing surfaces, the impeller side face of the bearing housing and the rabbit fit area of the support
assembly. Do not apply oil or grease.
Slide the bearing housing assembly through the support assembly far enough so that a second strap can be placed on
the other side of the shaft. Level the bearing housing assembly and slide into position against the support assembly.
The connecting bolts can now be fastened.
Summary of Contents for LCV
Page 40: ...LCV en US 40 14 Notes ...
