"MS. PHILIPPIDES: Could you comment on this
proposition: if the engineer stated that he
quickly pumped the grease until it extruded
through the gland packing, and that is -
supposedly that occurred when the vessel was
being unslipped but before it entered into the
water. Just a moment and I will get the - yes -
if the engineer in fact did the following:
proceeded to apply by hand the five grease
cartridges and continued to do so as the ship
entered the water, after entering the water, but
continued to pack grease into the stern tube
until it was seen to extrude from the stuffing
box - now, if that situation had occurred, given
the tightening of the packing which in your
report you said was packed so tightly that it
caused blueing, would it be possible to see the
grease extruding from the stern gland?---That
doesn't make any sense at all. The - if the
gland had been overtightened, which is obviously
the case, then the grease could not have got -
worked up past the gland packing. If grease was
seen coming past the gland packing, then the
gland must necessarily have been very, very
slack indeed. So somebody afterwards must have
tightened the packing up again - after that
grease was seen.
Yes. If the gland was packed so tightly as to
cause blueing, and that occurred before the
unslipping - that was when the tightening
occurred, then you would not expect, you say, to
see the grease extruding from the gland packing.
You would - where would you expect it to go?---
Well, you'd be able to take the line of least
resistance down into the inter-bearing space.
Right. and what is the effect of tightening the
gland - the packing? Now, I am not talking now
at any particular time, but what is generally
the effect of tightening the gland packing to
the extent of causing the blueing which was in
your photograph in your report?---The effect of
tightening the gland to such a degree that it
raises the steel of the shaft to blue heat would
be to raise the temperature of the shafting
material to in excess of 300 degrees C and that
would, without any shadow of a doubt, cause the
grease as used to burn hot, harden, denature and
become packed.
And where would it be packed?---In the immediate
vicinity of this stern tube bearing.
And in particular in respect of the bearing,
would it block the grooves in the bearing?---It
did block the grooves in the bearing. The
photographs in my report show that quite
clearly.
.....
Right. And that would mean that any grease
being applied would not reach the aft bearing?--
-No, it couldn't possibly.
And the five cartridges that were applied, would
that explain the reasonably well-lubricated
forward end of the shaft that you referred to in
your report - I think it was on page 8 - 8A.
You said that the inter-bearing space appeared
to have a co(r)pulent quantity of grease. You
are referring to the forward part of the shaft
there, are you?---Yes.
And that would possibly be the five cartridges,
would it?---That would be the initial five
cartridges that were pumped in, and possibly any
extra that was pumped in afterwards until the
bearing on the gland reached the temperatures
that are indicated in those photographs, after
which time the grooves would have blocked;
therefore no further grease could have been
pumped into the bearing, and it would obviously
seem very hard to whoever was presumably
administering grease to the stern tube.
Once the engine was engaged and running, that
hardening as a result of the packing being so
tight would occur fairly quickly, would it?---It
depends on the speed of the engine.
Yes?---I'm not being obtuse, but it would depend
on the speed of the engine - the shaft rotation,
and it could happen very, very - it could happen
fairly quickly, because as tight as it would
appear to have been, then it would have happened
very quickly. Bear in mind that we are talking
about somebody pouring 150 litres an hour of
water over it to keep it cool".