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Q: Can an
Isoflex flexible coupling take any form of mis-alignment.
A: NO - an
Isoflex flexible coupling is designed as a vibration dampener only! Any angle
/ offset misalignment will damage the flexible coupling.
Q: How important
is the alignment procedure.
A: This is
extremely important to the life of a flexible coupling. The gearbox
output flange and shaft half coupling must be within .003" in face
to face angle. The flanges must NOT be offset in any way i.e.,
vertical or horizontal.
Q: Can alignment
be achieved when the vessel is out of the water.
A: NO - a
temporary procedure can be done but the alignment needs to be
checked and completed when the vessel is in the water loaded in max
running trim.
Q: Can the
Isoflex flexible coupling be used in the alignment procedure.
A: NO - due to
it's Polymer form the flexible coupling is not consistent enough to gauge true
alignment. If the two flanges cannot be brought face to face then a
steel dummy that reflects the outer dimensions of the Isoflex must
be used.
Q: Can an
Isoflex flexible coupling deform under load.
A: Yes - but
only due to misalignment either at rest or when max thrust is
applied to the engine - which can dramatically alter the true
alignment if the engine mounts are to soft.
Q: How do I know
which Isoflex flexible coupling is correct.
A: Isoflex have
a vast range of couplings that are individually rated to a
particular gearbox. Henley’s staff can make this selection.
Q: Can I simply
bolt the flexible coupling in place after the alignment procedure has been
completed.
A: Yes - however
Isoflex require a certain sequence and torque which is stated on the
installation instructions.
Q: Do I use
locktite type product on the bolts.
A: NO - use
anti-seize grease, the bolts are supplied with spring washers.
Q: Is there a
"Get home" procedure if the coupling fails due to impact damage on
the drive line.
A: Yes - if the
driveline has been set up correctly the gap between the fwd end of
the prop boss and the aft end of the strut will be greater than the
width of the Isoflex flexible coupling - so when in trouble the
flexible coupling can be removed
and the flanges hard coupled as a temporary option. NOTE if a rope
cutter is installed on the shaft then a spare steel replica or
another spare Isoflex flexible coupling needs to be fitted.
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