PREVOST H3-41 Maintenance Manual page 696

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SECTION 18b: X3 SERIES BODY
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 affect undercarriage, condenser
coil and engine compartment. These areas must
be
thoroughly
cleaned
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.
12
PA1621 Maintenance Manual All Series | Revised Sept 2019
contains
many
key
to
remove
dirt
periods
depends
on
parts
show

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