Air Intake System Inspection
After resetting the air intake restriction indicator dur- ing 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 23.2.
Check a go/no-go indicator without graduations to see if the colored bar shows through the clear window.
2. 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.
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.
Engine Compartment Inspection
1. Check for water in the fuel/water separator, if equipped.
1.1 Place a suitable container under the fuel/ water separator.
1.2 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.
1.3 Alliance/Racor Models: Turn the drain plug counterclockwise to open it. See Fig. 23.9.
DAVCO Models: Remove the vent cap and open the drain. See Fig. 23.10.
1.4 Stop draining fluid when fuel begins to drain out.
Alliance/Racor Models: Turn the drain plug clockwise to close it.
DAVCO Models: Close the drain valve. Install and hand-tighten the vent cap.
2. Inspect the steering components.
2.1 Inspect tie rods, steering arms, and the drag link for signs of looseness (i.e., shiny spots or rust tracks). See Fig. 23.11.
2.2 Check the steering gear mounting bolts and pitman arm nut, if equipped, for signs of looseness.
2.3 Check the drag link nuts for missing cotter pins.
2.4 Inspect the steering intermediate shaft and end yokes for excessive looseness or other damage.
3. Inspect the serpentine drive belts for signs of glazing, frayed edges, breaks, cracks, or oil con- tamination.
4. Check the power steering reservoir fluid level.
The power steering fluid level should be between the MIN COLD mark and the middle mark just above it. If needed, fill the reservoir with auto- matic transmission fluid that meets Dexron III or TES-389 specifications.
5. Inspect visible engine wiring for damage or looseness. Check for loose wiring, chafed insula- tion, and damaged or loose hold-down clamps.
Source: MaintainX (Community Member)