Different types of air cleaners are used. The standard type is the traditional dry paper element, but an oil bath air cleaner could be included on some vehicles as special equipment.
REMOVAL & INSTALLATION
See Figures 1, 2, and 3
Remove the top from the air cleaner, then remove the element and wrapper (if equipped). If the filter is equipped with a wrapper, remove and wash it in kerosene or similar solvent. Shake or blot it dry. Saturate the foam wrapper (through 1973) in 10W-30 oil and squeeze it tightly in an absorbent towel to remove excess oil. Leave the wrapper moist. The 1974 and later models use an optional white polyester outer wrapper which should be left dry.
Carefully clean the filter element by blowing it out with compressed air (from the inside out). Do not immerse the paper element in liquid. If the paper element is saturated for more than 1 / 2 of its circumference by oil from the wrapper, the element should be replaced and the rest of the crankcase ventilating system checked for proper function.
Wash the top of the air cleaner and housing with a suitable solvent, then wipe dry.
See Figures 4, 5, 6 and 7
Do not immerse the temperature sensor, located in the housing, in cleaning solvent.
Install the paper element and wrapper (if equipped), then install the air cleaner cover.
See Figures 8 through 14
See Figure 15
Oil bath air cleaners should be inspected for sediment level and correct oil level at every oil change. Cleaning is recommended more often for use in extremely dusty or off-road areas. Under extreme conditions, the filter may have to be serviced each day. Sediment should not exceed a build up beyond 3 / 8 in. (9.5mm) below the ledge on the oil reservoir.
To service the air cleaner, remove the cover, filter element, and empty the oil from the reservoir. Wearing a pair of gloves, thoroughly clean the air filter element and air cleaner assembly in a suitable container using kerosene, then drain. Make sure to properly dispose of the used kerosene. Pay particular attention to the sump in the reservoir. Refill the reservoir to the arrow with fresh SAE 10W-30 engine oil and install the assembled air cleaner.
The diesel engine air filter should be cleaned every 6,000 miles and replaced every 18,000 miles. Remove the air cleaner assembly, then remove the paper element and the outer wrapper, if so equipped. Wash the wrapper in kerosene and shake it dry, then blow compressed air through the paper element to removed any dirt. If the filter element is saturated with oil for more than 1 / 2 it's circumference, replace the filter element and wrapper.