| NOTICE |
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Service the air cleaner only with the engine stopped. Engine damage could result. |
Park the machine on a level surface and engage the parking brake. Lower the dump body and stop the engine.
The air filter service indicator is located inside the engine compartment. The air filter service indicator is mounted onto the air intake pipe, adjacent to the engine oil dipstick.
Note: There are two types of air filter service indicator that can be installed into the air inlet system. The air filter service indicator can be cylindrical in shape, or in the shape of a bowl.
The air filter service indicator can be inspected when the engine is running or stopped.
- Raise the hood. Use a clean towel and remove any accumulated dust from the air filter service indicator.
- Inspect air filter service indicator (1) for contamination of the fresh air filter.
Note: The air filter service indicator has four indicator sight glass windows. Two of the indicator sight glass windows are normally yellow in color and two of the indicator sight glass windows are normally green in color. The two indicator sight glass windows that are normally yellow in color will gradually turn to a red color as the fresh air filter becomes blocked. The amount of red showing in the yellow indicator sight glass window will indicate the condition of the fresh air filter.
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| Illustration 1 | g00601030 |
Type 1. Indicator | |
- If the indicator sight glass window that is normally green in color shows a 100% red indication, service the fresh air filter.
- Inspect air filter service indicator (2) for contamination of the fresh air filter.
Note: The air filter service indicator is a transparent glass bowl. A yellow colored spring loaded piston is installed in the center of the indicator. Two working areas are imprinted onto the internal surface of the transparent glass bowl. One working area is green in color and one working area is red in color. The working area that is green in color is marked with a graduated scale. The graduated scale indicates the condition of the fresh air filter. The working area that is red in color indicates immediate servicing of the fresh air filter. The yellow piston gradually moves from the green working area to the red working area as the fresh air filter becomes blocked.
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| Illustration 2 | g00639730 |
Type 2. Indicator | |
- If the yellow piston shows in the red working area of the air filter service indicator, service the fresh air filter.
Refer to the Operation and Maintenance Manual, "Engine Air Filter Primary Element - Clean/Replace".
Refer to the Operation and Maintenance Manual, "Engine Air Filter Secondary Element - Replace".
- After you have inspected the air filter service indicator and after you have carried out the necessary maintenance, the indicator should be reset. In order to reset the air filter service indicator, depress the base of the indicator with your thumb.
Note: The reset procedure for air filter service indicators (1) and (2) is identical.
- Lower the hood.