TB 43-0213
a. Wash the interior of structures through drilled
23-2. Cleaning Procedures.
access holes to remove mud, dirt, and rust. Use of a
high pressure washer will facilitate this operation.
WARNING
Observe the water flushed through the rails to
determine when it is clean.
When cleaning, water may be discharged in
excess of 1200 psi (8274 kPa) from high
b. Allow at least four hours for vehicle drying.
pressure water equipment. Serious injury
Additional drying time may be required if unfavorable
could resuil. Eye protection must be worn
to prevent injury.
weather conditions exist. Compressed air may be used
to speed up the drying process.
CAUTION
c. Prime and paint those areas showing bare metal.
Steam cleaning will not be used.
Allow painted areas time to dry before rustproofing.
Section II. RUSTPROOFING PROCEDURES
low as possible while maintaining an even spray pattern.
23-3. Rustproofing Procedures.
An acceptable starting point is 40 psi (276 kPa), but
adjustments may have to be made due to temperature
changes and differences in rustproofing compound.
CAUTION
Using too much pressure will waste compound by
causing overspray and excessively thick coatings.
Do not spray any portion of moving
components, rubber bump stops, brake-
c. Rustproofing Underbody (see Figure 23-2).
drums, brake backing plates, parking brake
linkage, tires, or electrical components.
(1) Insert flexible tool as far as possible into all
Cover all areas with paper where necessary.
body support channel holes A. Spray while slowly
withdrawing the tool.
NOTE
(2) Insert flexible tool into the ends of body
There are areas where a 10 mil wet film
q
support channels 5, 6, 7, and 8 as far as possible, then
thickness cannot be obtained without
slowly withdraw tool while spraying.
wasting a large amount of compound. In
those areas, complete coverage of the
(3) Use short rigid tool to completely cover the
surface area is necessary at whatever
underbody.
thickness is obtainable.
(4) Use the 90 degree short tool with the
For rustproofing procedures of specific
q
cone-spray tip to cover all inaccessible areas. These
cargo trailer items, refer to Figure 23-2
areas include inside of frame channels and fenders.
through Figure 23-5.
d. Rustproofing Tailgate (see Figure 23-4)
a. Dry Film Thickness Requirements. A five mil dry
(1) Insert long rigid tool into holes A and B of
film thickness is required for adequate rustproofing
protection. A 10 mil wet film thickness is required to
the tailgate horizontal stiffeners as far as possible, then
slowly withdraw tool while spraying.
obtain a minimum five mil dry film thickness. If
needed, the vehicle can be resprayed to reach proper
(2) Insert 90 degree short tool into holes A and
thickness.
B and spray in all directions.
b. Spraying Pressure. The rustproofing compound
(3) Insert 90 degree short tool into holes C and
should be applied to sheet metal and structural
spray in all directions.
members in even coats. Spraying pressure should be as
23-2
