PB3 User Instruction
Page 17 of 39
b)
Reverse rim indicator alignment
c)
Laser
alignment
.
3.4.2 Dial-indicator-based alignment
3.4.2.1 Check soft foot
Soft foot can affect the alignment readings and should be checked first and eliminated on both pump and driver.
a)
Tighten hold down bolts.
b)
Set a dial indicator on one foot, loosen the bolt and check if there is an indicator reading. If so place a
shim with the same thickness as the displacement.
c)
Check and adjust all feet.
3.4.2.2 Set DBSE
The shaft gap, or distance between shaft ends (DBSE), must be in accordance with the certified General
Arrangement Drawing and must be measured with pump and driver shafts in the center of their axial end float.
Motor with sleeve bearings is to be aligned with rotor at magnetic center.
Move driver to insure proper gap distance.
NOTE
It is recommended that the pump hold down bolting be torqued before taking any
alignment measurements. This makes the pump the fixed machine and driver the
movable machine. In certain cases, however, it may be impractical to move the
driver; therefore; the pump may have to be moved.
3.4.2.3 Determine bracket sag
Bracket sag must be determined and included in the alignment calculation.
a)
Install clip with extension pieces and dial indicator(s).
b)
Place indicator on top and reset to zero, turn 180° and read indicator and register.
c)
Record sag reading obtained at the bottom.
d)
Side to side readings need not to be corrected as the sag is equal on both sides.
