7452-040
UnclassifiedAir Intake
What This Code Means
The entire screen on the service indicator becomes red; Restriction of the air flowing through the air filter reaches 762 ± 6 mm (30 ± 2.3 inches) H2O; Service indicator has cracks; Service indicator has holes; Service indicator has loose fittings; Service indicator does not reset in three pushes or less; Service indicator plunger does not move when starting the engine
Possible Causes
- •Air cleaner element is dirty
- •Debris entering the indicator mechanism
- •Defective service indicator
- •Hole for the service indicator is plugged
- •Using paint, a waterproof cover, or plastic as a protective covering for storage of primary air cleaner elements
Suggested Actions
- 1Clean the air cleaner element
- 2Do not use paint, a waterproof cover, or plastic as a protective covering
- 3Inspect and clean the porous filter using compressed air or a clean nonflammable solvent
- 4Place the primary air cleaner element into a box for storage
- 5Replace the air cleaner element
- 6Replace the service indicator
- 7Replace the service indicator and torque the fitting to 2 N·m (18 lb in)
- 8Wrap the primary air cleaner elements in Volatile Corrosion Inhibited (VCI) paper
Related Caterpillar Fault Codes
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