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3. Check filter gasket for cracks, tears, or other signs of damage.
4. Check element for oil or soot contamination.
5. Check the secondary element for cleanliness. If there is visible dirt on the secondary element, replace both
primary and secondary elements. Do NOT clean.
IMPORTANT:
The air cleaner’s primary (outer) filter element should be replaced after three cleanings or at the specified
interval. The secondary (inner) element should be replaced every third time the primary element is changed.
Refer to 5.12 Maintenance Schedule, page 415 for the required interval.
6. If secondary element passes inspection, clean primary element as follows:
a. Use compressed air NOT exceeding 400 kPa (60 psi), and a dry element cleaner gun.
b. Hold nozzle next to inner surface only, and move up and down on pleats.
c. After three cleanings (or at the specified interval), replace the primary element.
7. Repeat inspection before reinstalling filter element.
Removing and Installing Secondary Air Filter
Figure 5.63: Secondary Filter Element
NOTE:
Refer to 8.2.4 Filter Part Numbers, page 462 for
replacement filter part number.
Replace the secondary air filter (A) every year or after every
third primary filter change, even if it appears clean.
If the secondary air filter is dirty, inspect the primary filter
and the filter canister to determine the reason for
contamination.
• Examine the filter canister for cracks and replace if
necessary.
• Ensure filter sealing surfaces are soft, flexible, and
sealing properly. Hard seals may allow debris through to
the secondary filter.
• Ensure canister retaining latches are secure.
NOTE:
• Do NOT remove the secondary filter element unless it needs replacing. For secondary filter part number, refer to
8.2.4 Filter Part Numbers, page 462.
• Do NOT attempt to clean the secondary element (A). The secondary element is replace only.
1. Remove the primary filter. Refer to Removing Primary Air Filter, page 318.
IMPORTANT:
When replacing secondary filter, reinsert new filter as soon as possible to prevent dirt from entering engine
intake. Do NOT remove secondary filter unless a replacement is available for installation.
MAINTENANCE AND SERVICING
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