Painting The Drive; Sx And Dp-S Drives; Preparation; Paint Application - Volvo Penta 3.0GLP-C Owner's Manual

Painting the Drive

SX and DP-S Drives

The SX and DP-S sterndrives and transom shield use
a silicon-alloy aluminum casting process. The process
requires a unique paint repair procedure.

Preparation

WARNING! Always follow the manufacturers
instructions regarding personal protection
when handling chemicals. You should always
wear eye protection and gloves as a good
work habit.
1. Remove all marine growth.
2. Use sandpaper or sandblast to remove loose
paint and corrosion. Use a medium grit aluminum
oxide sandpaper. If sandblasting use 55 - 25 grit
(0.2 - 0.7mm) aluminum oxide blasting media.
CAUTION! Do not use steel wool or emery
cloth. Small pieces of steel or iron oxide used
to produce steel wool and emery cloth will be-
come embedded in the aluminum and cause
severe corrosion.
3. Wash with hot water and detergent to remove all
traces of oil and grease.
4. Roughen any painted areas that will be re-coated
with a medium synthetic scouring pad or equiva-
lent (i.e. 3M Scotchbrite™).
5. Rinse with water thoroughly and allow to air dry.
Do not use a rag to wipe the area as some rags
may have silicone.
6. Clean the entire area with an acid cleaner that
does not contain fluoride (i.e. DuPont® 5717).
Scrub surface with a synthetic scouring pad until
it is completely "wetted," where no water beads
on the surface. Follow all local laws and regula-
tions when using or disposing of any chemicals
used in this process.
CAUTION! Fluorine in a cleaner causes
"smut" (a dark discoloration on silicon-alloy
aluminum castings), and paint will not stick to
"smut". If this happens, sand the surface and
start over using a different acid cleaner.
7. Rinse with water thoroughly and allow to air dry.
VPA 7743722 English 10-2004

Paint Application

1. Treat any bare aluminum with chromate conver-
sion coating.
2. Rinse thoroughly with water. The area must
appear "wetted" or the surface is not clean and
the paint will not adhere.
3. While the surface is still wet from rinsing, treat all
bare aluminum with conversion solution. Brush
the chromate solution on the surface. Add addi-
tional solution as necessary for 2 to 5 minutes to
prevent it from drying on the surface. Rinse the
surface thoroughly with water and allow to air dry.
Follow the manufacturers instructions exactly.
•
If the chromate is allowed to dry anywhere on
the bare aluminum surface, chromic acid salts
will form which will prevent paint adhesion and
promote corrosion. Sand the surface to bare
metal.
•
Do not blow dry the part with compressed air
unless it is completely free of dirt, oil and water.
•
Do not heat the part above 140°F before paint-
ing.
•
Do not touch the treated surface with bare hands
before painting.
•
The part should be primed soon after it dries, or
at least within 24 hours.
•
It is best to let the part air dry, but if you must
wipe the surface to speed up drying, use a lint
free wipe not treated with anything that may con-
taminate the surface. Do not scrub the surface
— wipe very lightly.
4. Where the primer coat is thin or where the sur-
face is unpainted, prime with Volvo Penta primer
P/N 11415627 or an equivalent epoxy primer (i.e.
PPG® Super Koropon). Do not apply primer over
a glossy hard finish coat without roughening.
Primer solvents must be allowed to evaporate
and the primer must harden before applying the
finish coat. Follow the label instructions for
method applications, drying times, and proper
disposal of residual product.
5. Apply finish coat. Volvo Penta Parts Catalogs and
the Volvo Penta Parts and Accessories Catalog
list part numbers for the finishing products that
apply to your Volvo Penta product.
Maintenance
97