Freightliner: some trucks have been found with incorrect sealing of air intake duct assemblies, allowing...

Bulletin number

SB-09-31

Component

Engine and engine cooling: engine: diesel

Summary

Freightliner: some trucks have been found with incorrect sealing of air intake duct assemblies, allowing unfiltered air to bypass the air cleaner. Loose duct connections or dirt found in the ducting during a filter service indicate that duct clamps should be checked, and rubber seals added where not present. Loose ducting should be thoroughly inspected for damage and replaced if necessary. No model years listed.

Owners of these vehicles have filed 3 complaints in the engine category.