EBARA EFQT12 - 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.