PREVOST H3-41 Maintenance Manual page 836

DESCRIPTION
Perform structural inspection for corrosion
as described in this document
CAUTION
Reject member, chassis component, axle, etc. if:
Cracked, broken, separated by corrosion or corroded to a depth as to weaken member so as to affect
the safety and structural integrity of the vehicle.
DANGER
Park vehicle safely, apply parking brake, stop engine. Prior to working on the vehicle, set the ignition
switch to the OFF position and trip the main circuit breakers equipped with a trip button. On Commuter
type vehicles, set the battery master switch (master cut-out) to the OFF position.
THE IMPORTANT AREAS THAT SHOULD BE INSPECTED
Front & rear sub-frames, drive axle cradle and tag axle (
high strength steel. Although the structure on a Prevost vehicle receives a beneficial corrosion preventive
compound application at the end of the manufacturing process, after many years of service with exposure
to harsh environments (winter, frequent rains, road salt, stone projection, sand accumulation, etc.), the
carbon steel can be subject to severe corrosion. The use of high strength steel remains a requirement to
withstand peak loads.
FIGURE 1 – CRITICAL AREAS: FRONT SUB-FRAME, REAR SUB-FRAME, DRIVE AXLE CRADLE AND TAG AXLE
STRUCTURE INSPECTION – CORROSION
Normal duty cycle vehicles and normal environment operation
Every 5 years starting from the 5
Severe duty cycle vehicles and harsh environment operation
Every 2 years starting from the 5
Whenever a visual inspection discloses that corrosion seems
to have caused damages to the structure such as
perforation, flaking, separation of metal layers, loss of
material, etc.
INTERVAL
year in service
th
year in service
th
) on Prevost structures are made of
FIGURE 1
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