MCi Crusader II 1989 Maintenance Manual page 89

Date
1-1-89 ·
Page·.:....· __
3-_1s _ _
MC-9 MAINTENANCE MANUAL
3. Apply 226S Conversion Coating - In a plastic container
and without dilution, use a Scotch-Brite or similar pad and
apply to the treated metal surface. Leave on the surface two to
five minutes. Work only as much area as can be coated and
rinsed before the solution dries. Reapply if surface dries before
rinsing. Rinse by flushing the surface with cold water or mop
with a damp sponge or cloth rinsed occasionally in clean water.
Wipe dry with clean cloths or air dry. Apply primer.
4. Apply 8245/825S Epoxy Primer.
FIBERGLASS PANELS
1. Surface Preparation - Wash the surface with 3819S
PrepSol. While still wet. wipe dry with clean cloths.
2. Sand thoroughly, clean and apply 8245/8258 Corlar
Epoxy Primer.
PRIMING STEEL, STAINLESS STEEL,
ALUMINUM, FIBERGLASS
825S Corlar Epoxy Primer (red) is our recommendation for
steel, stainless steel and aluminum. 8245 Corlar Primer (gray) is
our recommendation for fiberglass and may also be used on
aluminum.
Activation - to two parts 824S/825S Primer. and one part
826S Activator.
Induction Period - allow activated primer to stand one hour
at 70°F (21 °C) and above; two hours when temperature is
below 70°F (21 °C). This will allow the chemical reaction to take
place.
Pot Life - three days at 70°F (21 °C).
Reduction - reduce activated primer 33-1 / 3 percent by
volume (ratio 3 to 1) with 3602S Lacquer Thinner to a viscosity
of 21-24 sec. in a Dupont M-50 Viscosity Cup or equivalent
Application - Using 45-55 psi "at the gun," spray one full
wet coat to give a dry film thickness of 0.7 to 1.0 mils.
Drying Time - two to six hours depending on temperature
and film thickness. Overnight dry may be necessary when 2 or 3
coats have been applied and/or when temperatures are low.
PRIMING PREVIOUSLY PAINTED STEEL,
STAINLESS STEEL, ALUMINUM, FIBERGLASS
1. Wash the painted surfaces with soap and water to remove
dirt and water-soluble contaminants.
2. Wipe the painted sunaces with 3919S Prep-Sol to remove
wax, grease and other contaminants. While solvent is wet. wipe
dry.
3. Repairflaws in the painted surface by grinding off paint in
the damaged areas and fill in body filler, if necessary. Feathe-
redge ground-off areas by machine or hand sanding. Treat
bare metal areas with the appropriate conditions and conver-
sion coatings.
4. Apply 824S, 825S, 1 00S or 11 OS as recommended above.
Prime as follows:
825S Corlar Epoxy Primer (red) is our recommendation for
priming or spot priming previously painted surfaces where the
metal substrate is steel, stainless steel or aluminum. 8245
-Corlar Epoxy Primer (gray) is our recommendation for priming
or spot priming previously painted surfaces where the sub-
strate is fiberglass (can also be used on aluminum).
Activation - to two_ parts 8245/ 825S Primer, add one part
8265 Activator.
Induction Period -allow activated primer to stand one hour
at 70°F (21 "C) and above: two hours when temperature is
below 70° F (21 °C). This will allow the chemical reaction to take
place.
Pot Life - three days at 70°F (21 °C).
Reduction - For spot repairs, reduce the activated primer
20 percent by volume (ratio 5 to 1) with 3602S Lacquer Thinner.
Application - using 45- 55 psi "at the gun," spray until satis-
factory filling is achieved (2 to 4 coats).
Drying Time - with this heavier mixture, drying time will be
extended to four to eight hours and overnight dry may be
necessary.
SPOT PRIMING
100$ Gray/110S Red Oxide Multi-Purpose Acrylic Lacquer
Primer may be used as an alternate priming system for making
spot repairs on small bare metal areas. Metal to be treated as
described above.
Reduction - 80 to 125 percent by volume (ratio 1 to 1) to a
viscosity of 23-24 sec. on a Dupont M-50 Viscosity Cup or
equivalent with 3661 S Lacquer Thinner in the the mid-temp
ranges and 3602S Lacquer Thinner during warm weather.
Application - using 35-45 psi "at the gun," spray three or
more coats as needed. Allow each coat to completely flash.
Drying Time -allow to dry thoroughly before sanding - 30
to 60 minutes.
FIBERGLASS REPAIRS
All repairs to fiberglass parts consist of filling the damaged
area with fiberglass cloth and resin or strand fiberglass and
resin. The repair is allowed to harden and then the finishing
operations are performed. Use of the various materials is
determined by the type of repair to be made. Large holes, torn
sections and separated joints require the adhesive qualities of
the resin and the reinforcing qualities of the fiberglass. Small
dents. scratches or pits can be repaired using resin, strand
fiberglass and filler mixed into paste. Instructions for either mix
are explained later.
The following additional tools and materials will assist in
making repairs. Hacksaw blade, assorted files, emery paper or
cloth (No. 150 grit or finer), scissors or tin snips, wax paper or
cellophane sheets. small 3" (76.2 mm) paint roller, paint brush,
putty knife, acetone and one or more heat lamps.
For best results the ambient temperature should be 70° to
75°F (21-24"C) when making repairs.
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