Goulds Pumps 7200CB - IOM - Manual (Page 121)

Maintenance
g) Hand tighten the locknut (138) with a spanner wrench. Do not over tighten the bearing.
Tap the of the spanner wrench with light strikes from a dead blow hammer while you
note the location of the next available lockwasher (382) tab that aligns with the slots in
the locknut.
The turning resistance of the nut increase as it tightens. Plan the alignment of the
lockwasher tab with the locknut fully tightened. If the locknut is still turning with light
strikes with the hammer, then continue to tighten the locknut until the next available tab
is aligned with a slot. Do not use heavy strikes with the hammer. If it is not possible to
reach the next tab, then loosen the locknut to align with the previous tab.
h) Check the condition of the outer races by rotating the bearings by hand in opposite
directions:
• The outer races generally cannot be counter rotated by hand, but if they do move,
the resistance must be high.
• If the outer races are loose, the bearing is not properly seated and must be
retightened.
i) When you have achieved the proper bearing assembly, set the lockwasher tab in the
slot in the locknut.
5. Tighten set screws on the mechanical seal sleeve collar. Disengage the setting tabs and
ensure they are retightened clear of any rotating part. Refer to the seal installation drawing
provided by the manufacture. Complete tasks on both seals at this time.
6. Install the balance line and gaskets (351M). Torque bolts (791L) and nuts (357T) to the
values found in the “Maximum Torque Values for Fasteners” table.
Post-assembly checks
Perform these checks after you assemble the pump, then continue with pump startup:
• Rotate the shaft by hand in order to make sure that it rotates easily and smoothly and that
there is no rubbing.
• Open the isolation valves and check the pump for leaks.
Model 7200CB, API Type BB5 Barrel Multistage / ISO 13709 2nd Edition / API 610 11th Edition Installation, Operation, and 119
Maintenance Manual