Specifications

Maintenance Schedule and Lubrication Preventive Maintenance
– 168 – Y53-6008A
Medium Duty (R05/09)
NOTE: Keep the engine exhaust system and the
vehicle’s cab ventilation system properly main-
tained. It is recommended that the vehicle’s
exhaust system and cab be inspected:
• By a competent technician every 15,000 miles.
• Whenever a change is noticed in the sound of the
exhaust system.
• Whenever the exhaust system, underbody, cab or
sleeper is damaged.