Engine-Mounted Air Cleaner, 5700 Models

4700 mm 09.02.001

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.

For an installation diagram of the engine-mounted air cleaner used on 5700 models, see Fig..

  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

Fig. 1, Air Cleaner Assembly and Mounting Components, 5700 Models

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 (Fig.), or a go/no-go restriction indicator without graduations (Fig.).

Fig. 2, Manual-Reset Air Restriction Indicator, Graduated

Fig. 3, Manual-Reset Air Restriction Indicator, Go/No-Go

  1. Inspect the air restriction indicator to see if air restriction equals or exceeds the maximum allowable restriction. For instructions, see  of the Western Star Workshop Manual.
  2. Inspect the air cleaner housing for cracks, leaks, and any other damage. If the air cleaner housing or element is damaged, replace it.
  3. Check the inserts at all four assembly fastener locations (see Fig.). Each insert should protrude from the housing as shown in Fig..

    1. Air Cleaner Element Housing

    2. Air Cleaner Element

    3. Housing Cover

    4. Screws

    5. Inserts

    Fig. 4, Air-Cleaner Assembly, 5700 Models

    Note: Each insert should protrude from the housing as shown in item A.

    • Proper Fastener Installation

    • Damaged Insert, Flush

    • Damaged Insert, Countersunk

    1. Insert

    2. Screw

    Fig. 5, Air-Cleaner-Housing Fasteners, 5700 Models

  4. Inspect the forward and rear mounting isolators (see Fig.) for damage. Ensure the bonds between the rubber and the steel plates are completely intact. See Fig.. If a mounting isolator is damaged, replace it. For isolator replacement instructions, see Section 09.05 of the Western Star Workshop Manual.

    1. Steel Plate

    2. Rubber

    Fig. 6, Mounting Isolator

  5. If necessary, replace the air cleaner element. For air cleaner element replacement instructions, see Section 09.05 of the Western Star Workshop Manual.
  6. Reset the air restriction indicator.
Note:
Parent topic: Air Cleaner Element Inspection and Replacement
Document Number: 0000120160
Manual Publication Date: 2024-05-23
Topic Publication Date: 2024-10-31