TABLE OF CONTENTS With the movable unit (with no shims) resting on the base and the fixed unit in its fixed position, the combination of both indicators demanding the movable unit be lowered is most unwelcome. Any indicator arrangement can produce this problem. If the movable unit is too high, it s simply too high. Of at least five different ways to circumvent this problem, the one most practical and most often used is:
Simply raise the pump (fixed unit) to an adequate elevation to compensate for the existing misalignment, plus enough to allow the movable unit (motor) to rest on a minimum shim pack of some .050".
| Note | This mentioned .050" is simply a rule of thumb , not law. But it s smart to leave some maneuvering room in case a drive unit has to be replaced. |
For the most part, the fixed unit can be raised via shims without creating problems. It simply becomes a fixed unit at a higher elevation. At other times a fixed unit must remain exactly that: fixed. This is when a combination of concrete and steel forbids even the mention of attempting to raise the fixed unit.
Remove metal from the bottom of the motor feet. This can be an easy or very complex process depending on varied conditions. Again, as with the shim rise with the fixed unit, enough metal should be removed for the movable unit to rest on a sensible measure of shims besides being lowered into an...
