Inspection of the Engine Compartment

cen dm 11.03.001

Warning: Washer fluids may be flammable and poisonous. Do not expose washer fluid to an open flame or any burning material, such as a cigarette. Always comply with the washer fluid manufacturer's recommended safety precautions.

  1. Check the windshield washer reservoir fluid level.
  2. After resetting the air intake restriction indicator during the daily pretrip inspection, check the indicator again with the engine off.
    1. Check an indicator with graduations to see if air restriction exceeds the value shown in Table..
      Check a go/no-go indicator without graduations to see if the colored bar shows through the clear window.

      Table 1, Air Intake Maximum Restriction Values: (inH2O)

      Air Intake Maximum Restriction Values: (inH2O)

      Engine Make

      Pre-EPA07 Engines

      EPA07 Engines

      Caterpillar

      25

      —

      Cummins

      25

      25

      Detroit™

      20

      22

      Mercedes-Benz

      22

      22

        Table 1, Air Intake Maximum Restriction Values: (inH2O)

      1. If air restriction exceeds the maximum allowable value, operate the vehicle for one more day, making sure not to run the engine over rated rpm. Refer to the engine operation manual for more information on rated rpm for your engine.
      2. If air restriction exceeds the maximum value again, replace the air cleaner. For instructions, refer to Group 09 of the Century Class Trucks Workshop Manual.
    2. If the vehicle is equipped with an Allison automatic transmission, check the automatic transmission fluid level.

      3. Important: When draining fluid from a fuel/water separator, drain the fluid into an appropriate container and dispose of it properly. Many jurisdictions now issue fines for draining fuel/water separators onto the ground.

    3. Check for water in the fuel/water separator, if equipped.
      1. Place a suitable container under the fuel/water separator.

        Note: A hose may be used to direct water into the container. Use a hose with a ½-inch pipe thread on DAVCO models.
        1. If the engine is equipped with a built-in water separator, loosen the drain valve, and allow the water to run out. Close the drain valve, taking care not to overtighten it.
        2. Detroit/Racor Models: Turn the drain plug counterclockwise to open it. See Fig..
          DAVCO Models: Remove the vent cap and open the drain. See Fig..

          1. Washers (qty 2)

          2. Nuts (qty 2)

          3. Frame Rail

          4. Fuel Outlet Port

          5. Fuel Inlet Port

          6. Priming Pump

          7. Mounting Head

          8. Mounting Bolts (qty 2)

          9. Filter Element

          10. Sight Bowl

          11. Drain Plug

          Fig. 1, Alliance Fuel/Water Separator Assembly and Installation

          1. Drain Valve

          2. Lower Housing

          3. Clear Cover

          4. Vent Cap

          5. Collar

          6. Inlet Port/Check Valve

          Fig. 2, DAVCO Fuel/Water Separator (Fuel Pro 382 shown)

          Important: Water in the fuel/water separator will appear as beads. Drain the fuel/water separator only enough to remove the water. Stop draining fluid when fuel begins to drain out. If the fuel/water separator is drained of fuel, it will be necessary to prime the fuel system before the vehicle can be started again.
          1. Stop draining fluid when fuel begins to drain out.
            Detroit/Racor Models: turn the drain plug clockwise to close it.
            DAVCO Models: close the drain valve. Install and hand-tighten the vent cap.
        3. Inspect the steering components.
          1. Inspect tie rods, steering arms, and the drag link for signs of looseness (i.e., shiny spots or rust tracks). See Fig..

            1. Steering Gear Mounting Bolts

            2. Pitman Arm Pinch Bolt Nut

            3. Drag Link Nut

            Fig. 3, Integral Steering Gear Fasteners

          2. Check the steering gear mounting bolts and pitman arm nut, if equipped, for signs of looseness.
          3. Check the drag link nuts for missing cotter pins.
          4. Inspect the steering intermediate shaft and end yokes for excessive looseness or other damage.

          4. Notice: Do not drive with a drive belt that is visibly worn or damaged. If it fails, the lack of coolant flow could rapidly cause damage to engine components.

        4. Inspect the serpentine drive belts for signs of glazing, frayed edges, breaks, cracks, or oil contamination.
        Note:
        Parent topic: Weekly Post-Trip Inspections and Maintenance
        Document Number: 0000118255
        Manual Publication Date: 2024-05-13
        Topic Publication Date: 2024-06-06