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[A] Installation
1 Inspection before seal installation
Make sure there is no serious damage on the surface of propeller shaft sleeve and
bulk head in which the sealing is installed. As damage give a bad influence on the
seal performance and fitting works, they should be corrected by CATALOY or equivalent.
When especially corrosion is severe, repair by FRP or molybdenum coating is
effective.
2 Painting on shaft sleeve
Remove grease and oil from painting area completely with solvent.
On the surface of the shaft sleeve in which the sealing is installed, EAGLE PAINT
or equivalent Epoxy paint should be painted on 2 times for against corrosion
(especially crevice corrosion and pitting corrosion). Part of bearing sliding area
is not to be painted.
When sealing is to be disassembled, check condition of shaft sleeve surface. If
paint peeled off, repainting to be done.
3 Assembling
(1)Inflatable ring
For new construction vessels, this seal is always delivered fitted in the seal
casing by our factory, so install it in accordance with item (2).
When assembling on shaft sleeve, perform as follows. (See Fig.-1)
a. Insert the inflatable ring into the casing.
b. Screw the anchor pin to the inflatable ring.
c. Fix the infla retainer on the casing.
d. Tighten the lock nut in the anchor pin. At this time, be careful not to twist
the anchor pin by fixing the square part of the pin with a wrench.
e. Tighten another lock nut in the anchor pin.
(2)Casing
a. Install the gasket to mounting surface of the casing. (Apply a liquid packing,
if use other gasket than rubber material.)
b. Temporarily install the casing, properly aligning the "TOP" mark.
c. After adjusting the casing position to provide a uniform clearance between the
infla retainer and the propeller shaft sleeve, securely install the casing.
The maximum fitting error of clearance is 0.5mm. (See Fig.-1)
(3)Seal ring and Mating ring
a. After remove dirt from the casing and the shaft sleeve, apply a thin coat of
grease to the surface of the shaft sleeve. Then wipe away surplus grease with
your hand.
b. After apply a thin coat of grease to the pocket of the seal ring, hook a garter
spring up in the pocket.
c.
Place “O” ring in the groove of the casing.
d.
Remove grease from the sliding surface of mating ring and seal ring COMPLETELY
with solvent (methyl ethyl ketone or equivalent).
e. Push the seal ring into the casing using the mating ring and fasten the mating
ring to the casing with bolts,aligning the TOP mark. At this time, fasten evenly
each symmetrical pair of bolts so that the seal ring may be pushed in equally
around the circumference.
