16-3. Rustproofing Procedures.
surface area Is necessarv at whatever
thickness is obtainable. -
For rustproofing procedures of specific
wrecker body items, refer to Figure 16-3
Do not spray any portion of moving compo-
nents, transmission, transfer case, cylin-
a. Dry Film Thickness Requirements. A five mil dry
ders, pumps, valves, prop shaft, exhaust
film thickness is required for adequate rustproofing
system, rubber bump stops, brake-drums,
protection. A 10 mil wet film thickness is required to
brake backing plates, parking brake linkage,
obtain a minimum five mil dry film thickness. If
shift linkage, tires, electrical components,
needed, the vehicle can be resprayed to reach this
engine linkages, or air intake systems. Cov-
er all areas with paper where necessary.
b. Spraying Pressure. The rustproofing compound
should be applied to sheet metal and structural
members in even coats. Spraying pressure should be as
There are areas where a 10 mil wet film
low as possible while maintaining an even sprav pattern.
thickness cannot be obtained without
An acceptable starting point is 40 psi (276 kPa), but
wasting a large amount of compound. In
adjustments may have to be made due to temperature
those areas, complete coverage of the
changes and differences in rustproofing compound.