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Tip #4 Inspect the Fan & Fan Hub Inspect the fan and fan-hub mounting and verify they are secured properly. Inspect the hub for bearing play, air leaks and clutch damage. Inspect the fan base and blades for cracking or missing sections.
Tip #5 Inspect the A/C Hoses
Tip #6 Air Filters
A/C hoses are designed to be routed and secured in a specific manner. Often times, the hoses are not secured or routed properly. Over time this can cause abrasion and eventually broken or leaking hoses.
Most modern trucks have air filters for the HVAC system. Usually there are filters for fresh air, recirculated air and sleeper units. The filters should be changed periodically based on maintenance manual instructions, but also on an as-needed basis due to operating conditions.
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