Note: Incorrect installation of the spacer will cause bearing failure and damage to the
pump.
The new bearings and spacers can be pressed onto the shaft using a bearing press. When pressing
them on ensure the pressure is only applied to the bearing inner race. If a bearing press is
unavailable a length of pipe can be used to drive the bearing onto the shaft. If this method is used
ensure that the pipe diameter is equal to the bearing inner race, and any dirt or pipe scale is
removed before use to prevent contamination.
End Cover Inspection and Cleaning:
Each of the end covers should be inspected for surface damage from rotor-to-end cover contact and
the bearing housing inspected for signs of spacer-to-bore contact.
If the end covers have been damaged by rotor-to-end cover contact and there are grooves worn in
ed. If there is no damage, or the damage is minor,
the face of the end cover should be wiped clean with solvent and then lapped with the lapping
compound against the other end cover. Once complete the covers should be wiped, cleaned, and
dried off with an air hose to remove any traces of lapping compound that could cause damage
during assembly or start-up.
If the bearing housing bore is damaged, it can be cleaned up with a small file or 400 grit wet/dry
sandpaper to remove any burrs. If either of the bearings had seized and spun in the housing, the fit
should be checked with a new bearing, to ensure that there is not excessive clearance.
Oil Seal Replacement:
The oil seals can be removed by inserting a screwdriver or punch through the shaft bore of the end
cover on the oil seal to drive the seal out.
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