IC Bus CE Series 2020, Operation And Maintenance Manual

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Maintenance
Once protective covers and closeout panels are removed, the
following basic steps should be followed.
• Perform a visual and touch inspection of all hoses. Hose
inspection process is to include all engine compartment
and body, interior and under body, hoses.
• Check heater and coolant system for signs of cold and
hot leaks.
• Pay attention to the hose ends and contact points that
will typically show early signs of hose failure. Observe
the area around all hoses for signs of leakage.
• Synthetic rubber can oxidize and harden over time.
Squeeze the hose to ensure it is pliable. Entire hose
length should have a consistent feel and appearance.
• Many times hoses will fail from the inside. A hose that
looks to be in good condition can fail due to deterioration
of the inner hose and reinforcement.
This type of
deterioration can sometimes be detected during pressure
testing.
• Cracks, blisters, or splits in the hose outer cover are the
most visible signs of hose failure.
• Pressure test complete heater and cooling system
annually.
Test should be completed while performing
hose inspection to allow all hoses to be observed for
bulges and leaks.
Upon completion of the inspection process, reinstall all
protective covers and closeout panels to original condition.
Many factors influence hose life such as location, years in
service and service environment.
Heater and coolant hose
replacement is recommended after 5 years of service. In the
event a hose failure is experienced prior to the recommended
replacement time frame, age and condition of remaining hoses
should be considered to determine if all engine and body hoses
should be replaced to reduce the potential for additional failures.
Frame and Optional Tow Hooks
The Bus Chassis are manufactured with frame rails of High
Strength Low Alloy (HSLA) steel and must be handled in a
specific manner to ensure maximum service life.
Specific
instructions are published concerning proper repair of frame
rails. Before attempting frame repair or modification, consult the
service manager of your IC Bus
® dealer.
Inspect front and rear tow hooks for damage or loose mountings.
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