Exterior Maintenance; Corrosion Prevention - PREVOST H3-41 Maintenance Manual

potentially damaging events associated with
welding.
3. Refer to "PRECAUTIONS
OBSERVED BEFORE WELDING" in Section
00 General Information of this manual.
4. Always wear the
equipment.
Weld in clean and well-ventilated area, and
always have an appropriate fire extinguisher
within your reach

6. EXTERIOR MAINTENANCE

Regular washing to remove dust and dirt is
recommended. See "Operator's Manual" or
"Owner's Manual" for more details on washing
and cleaning your vehicle.
6.1

CORROSION PREVENTION

Preventive maintenance is a key factor in
avoiding corrosion and must be considered as
part of the regular service intervals. The entire
underbody of the vehicle is sprayed with a heavy
application of asphalt base undercoating.
The operating environment the vehicle is
subjected to will largely influence the amount of
dirt and corrosion that will accumulate over a
given period. Corrosion is one of the most costly
factors of part failure and shortened part life. It
is, however, an item that can be controlled when
it is conscientiously looked after and the proper
steps are taken in a timely manner.
Certain areas of the coach are more vulnerable
to corrosion than others, and it is these areas
that should be addressed. For example, the rear
baggage compartment bulkhead in the rear
wheelhousing area
components and should be examined regularly
for corrosion. Other areas include the front
wheelhousing area and the engine compartment.
Road splash will
condenser coil and engine compartment. These
TO BE
appropriate safety
contains many key
affect understructure,
PA1621 Maintenance Manual All Series
SECTION 18a: H3 SERIES BODY
areas must be thoroughly cleaned to remove dirt
accumulations from flanges, channels and
ledges. These places accumulate dirt and salt
and hold it in direct contact with steel and
aluminum surfaces. Use an understructure high
pressure spray as part of a regular wash.
Damaged undercoating or paint should be
promptly repaired before corrosion can start.
Frequency of wash
operating conditions. During periods of exposure
to salt, daily washing as described above is
recommended. If underbody
evidence of rust or corrosion, treat as follows:
1. Remove dirt, grease and oil by solvent
washing.
2. Remove corrosion as well as all loose
coating by cleaning with a wire brush or
sandblasting.
CAUTION
Sandblasting can be used for cleaning
bulkheads, brackets and other structural
members. It should not be used for exterior
side paneling. Extreme care should be taken
not to sandblast excessively.
3. Apply correct primer, paint and undercoating
after removing all corrosion to prevent
further damage.
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Revised Sept 2019
periods depends on
parts show
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