255-2966 Air Filter Change Indicator for Caterpillar 320D 330D 349D
255-2966 Caterpillar Air Filter Change Indicator | Fits 320D 330D 349D
Product Information
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- Replacement Brand: Caterpillar
- Category: Engine Air Intake Parts
- Part Number: 255-2966
- Part Name: Air Filter Change Indicator
- Alternative OEM: 2552966
- Compatible Equipment: Caterpillar 320D, 330D, 349D, 345C, 336D and other listed applications; verify serial number and configuration
- Condition: New Aftermarket Replacement
Product Function & Specs:
255-2966 is a Caterpillar air filter change indicator used to monitor air restriction in the air line between the air cleaner and turbocharger. The indicator helps identify when the air filter requires inspection or replacement.
- Type: Mechanical air filter change indicator
- Thread: 1/8-27 NPSF
- Pipe Connection: 1/8-27 NPT listed by Cat
- Lead Wires: 2
- Cover: Included in the Cat product description
Application coverage includes various Caterpillar excavators, mobile hydraulic power units, material handlers, compactors, and other equipment. Confirm the original component and machine configuration before ordering.
Failure Symptoms:
- Air filter restriction warning does not activate as expected
- Incorrect or inconsistent air filter restriction indication
- Damaged indicator housing, wiring, or threaded connection
Quick Installation Notes:
- Confirm the part number, thread specification, and connector or wire arrangement before removal.
- Clean the mounting area and prevent dirt from entering the air intake system.
- Install the indicator according to the applicable Caterpillar service procedure and check the warning function.
Maintenance Tips:
- Inspect the indicator and wiring during scheduled air intake system maintenance.
- Check the air filter and intake lines for excessive restriction, damage, or contamination.
- Replace damaged indicators and investigate abnormal restriction readings before continued operation.
FAQ:
Q: What is Caterpillar 255-2966?
A: 255-2966 is an air filter change indicator used to monitor air restriction in the air line between the air cleaner and turbocharger.
Q: What is the thread specification?
A: Cat lists a 1/8-27 NPSF thread, while the product title identifies a 1/8-27 NPT connection. Confirm the original connection specification before installation.
Q: Which Caterpillar machines use this part?
A: Listed applications include various 320D, 330D, 349D, 345C, and 336D models, along with other equipment. Compatibility should be confirmed using the machine serial number.
Q: Is this an OEM or aftermarket replacement?
A: This product is supplied as a new aftermarket replacement. It is not represented as a genuine Caterpillar factory part.
Q: What should be checked before installation?
A: Check the thread specification, wire arrangement, housing condition, and air intake connection. Follow the applicable service instructions for installation and function testing.
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