EBARA EFQU4 - Manual (Page 13)

EBARA Fluid Handling 12
Figure 6A. Aligning Spider – Type Couplings
F
Figure 6B. Aligning Non-Spider Type Couplings
WARNING!
When checking alignment, disconnect the power source
to ensure that the pump will remain inoperative.
CAUTION!
Adjusting the alignment in one direction may alter the
alignment in another direction. Check each procedure
after altering alignment.
Coupled Drives
When using couplings, the axis of the power source
must be aligned the axis of the pump shaft in both
the horizontal and vertical planes. Most couplings
require a specific gap or clearance between the
driving and the driven shafts. Refer to the coupling
manufacturer’s service literature.
Align spider insert type couplings by using calipers
to measure the dimensions on the circumference of
the outer ends of the coupling hub every 90
degrees. The coupling is in alignment when the hub
ends are the same distance apart at all points (see
Figure 6A).
Align non-spider type couplings by using a feeler
gauge or taper gauge between the coupling halves
every 90 degrees. The coupling is in alignment when
the hubs are the same distance apart at all points
(see Figure 6B).
Check parallel adjustment by laying a straightedge
across both coupling rims at the top, bottom, and
side. When the straightedge rests evenly on both
halves of the coupling, the coupling is in horizontal
parallel alignment. If the coupling is misaligned use a
feeler gauge between the coupling and the
straightedge to measure the amount of misalignment.
V-Belt Drives
When using V-belt drives, the power source
and the pump must be parallel. Use a
straightedge along the sides of the pulleys to
ensure that the pulleys are properly aligned
(see Figure 6C). In drive systems using two pr
more belts, make certain that the belts are a
matched set; unmatched sets will cause
accelerated belt wear.