MAINTENANCE - What is the Air System? 3 Related concepts Related reference The operation of the vehicle’s braking system and many vehicle accessories depends upon the storage and application of a high-pressure air supply. What is the Air System? Important safety information about your vehicle's air system. Y53-1272-1B1 (08/17) 29 System Component Task I A B C D E Main and Auxiliary Transmission Main and Auxiliary Transmission and Transfer Case Inspect for visible damage, signs of overheating, and leaks. • • Check the drain plugs for tightness. • Mounting Brackets and Fasteners Check the condition of the fasteners and their torque. Tighten to the specified torque value as required.
• Oil Cooler Clean the fins (air-to-oil type) and body. Check the hose condition and for leaks: replace as required. • Main and Auxiliary Transmission Check the oil level: refill as required. • Main and Auxiliary Transmission (ON HIGHWAY) Drain lubricant while warm. Flush each unit with clean flushing oil. 500,000 miles/ 800,000 km Main and Auxiliary Transmission (OFF HIGHWAY) Drain lubricant while warm. Flush each unit with clean flushing oil. • •