Inspection and Replacement of the Air Cleaner Element
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 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, as shown in Fig., or a go/no-go restriction indicator without graduations, as shown in Fig..
Fig. 1, Manual-Reset Air Restriction Indicator, Graduated
Fig. 2, Manual-Reset Air Restriction Indicator, Go/No-Go
- Inspect the air restriction indicator to see if air restriction equals or exceeds the maximum allowable restriction. For instructions, see the Severe Duty Driver's Manual.
- If necessary, replace the air cleaner element. For air cleaner element replacement instructions, see of the Severe Duty Workshop Manual.
- Inspect the air cleaner housing for cracks, leaks, or any other damage. If the air cleaner housing or element is damaged, replace it.
- Reset the air restriction indicator.
- Each time the air cleaner housing is replaced, perform the procedures in MOP 05–01.
Notice: Do not use aftermarket air-cleaner elements. Aftermarket air-cleaner elements may not seal the housing correctly, which can lead to engine damage and potentially the loss of warranty. When replacing an air-cleaner element, use only the part listed in PartsPro for the serial number of the vehicle.