Air Intake 09 1 2 3 1 2 3 10 11 4 5 9 6 7 8 5 4 08/24/2001 1. Restriction Indicator 2. Air Intake Boot 3. Canister Mounting Clamp 4. Spring Clamp 5. Charge Air Cooler Hose f090419 07/30/2009 f090470 Fig. 4, Frontwall-Mounted Air Cleaner, Non–4700 Models 1. Air Cleaner Housing 2. Front Isolator Top Nut (2) 3. Air Restriction Indicator 4. Air Cleaner Outlet Hose Clamp 5. Air Intake Duct 6. Front Isolator (2) 7. Mounting Bracket 8. Rear Mounting Bracket Capscrew (2) 9. Rear Isolator 10. Rear Isolator Mounting Capscrew (2) 11. Rear Isolator Nut 09–02 Air Cleaner Element Inspection and Replacement NOTICE Do not use aftermarket air-cleaner elements.
After- market air-cleaner elements may not seal the housing correctly, which can lead to engine dam- age and potentially the loss of warranty. When re- placing an air-cleaner element, use only the part listed in PartsPro for the serial number of the vehicle. Engine-Mounted Air Cleaner, 5700 Models Fig. 5, Air Cleaner Assembly and Mounting Components, 5700 Models the cab if the vehicle is equipped with a dash- mounted restriction gauge. Vehicles may be equipped with either a manual-reset restriction indicator with graduations ( Fig. 6 ), or a go/no-go restriction indicator without graduations ( Fig. 7 ). 1.
Inspect the air restriction indicator to see if air restriction equals or exceeds the maximum al- lowable restriction. For instructions, see Group 09 of the Western Star Workshop Manual . For an installation diagram of the engine-mounted air cleaner used on 5700 models, see Fig. 5 . Restriction of air flow through the air cleaner element is measured at the tap in the air cleaner outlet. Check the restriction indicator at the air cleaner or in 2. Inspect the air cleaner housing for cracks, leaks, and any other damage. If the air cleaner housing or element is damaged, replace it. Western Star Maintenance Manual, January 2015 09/3