Cummins Onan 140-3351 Air Filter — 5.5 HDKBA Quiet Diesel RV Generator
Genuine Cummins Onan Green Label air filter with foam pre-cleaner for the 5.5 HDKBA Quiet Diesel RV generator, Spec A–E. Replace every 500 hours. 90-day limited warranty.
Genuine Onan Green Label Air Filter — HDKBA Quiet Diesel
The Cummins Onan 140-3351 is the OEM-specified air filter for the 5.5 HDKBA Quiet Diesel RV generator series (Spec A–E). Like all Green Label air filters, it is designed with a special foam pre-cleaner that provides an additional stage of filtration ahead of the main filter element.Non-Green Label substitutes may use lighter-density filter paper with sealing surfaces that become brittle and crack over time — allowing unfiltered air directly into the engine intake. Even a small amount of ingested dirt is enough to accelerate piston ring and cylinder wear. Replace every 500 hours per the Cummins Onan maintenance schedule.
Genuine OEM Green Label Part
Tested and designed specifically for Cummins Onan RV generators — meets OEM specifications for the 5.5 HDKBA Quiet Diesel series
? Foam Pre-Cleaner Included
Features a special foam pre-cleaner for enhanced filtration — an extra stage of protection not typically found in aftermarket filters
? Direct Drop-In Replacement
OEM fit for HDKBA Spec A–E — no modifications required; replace every 500 hours per Cummins Onan maintenance intervals
?️ Protects Engine Longevity
Prevents dirt ingestion that causes premature piston ring and cylinder wear — non-Green Label substitutes risk cracked seals and dirty air bypass
⚠️ Confirm Your Generator Model Before Ordering
This filter fits the 5.5 HDKBA Quiet Diesel (Spec A–E) only. Always confirm using your generator’s complete model number and spec letter before ordering. Refer to your Cummins Onan Operator’s Manual or the Green Label Parts Reference Guide to verify the correct part number for your specific unit.
Technical Specifications
| Part Number | 140-3351 |
|---|---|
| Brand | Cummins Onan |
| Part Type | Genuine Green Label Air Filter with Foam Pre-Cleaner |
| Generator Fit | 5.5 HDKBA Quiet Diesel RV — Spec A–E |
| Replacement Interval | Every 500 Hours |
| Weight | 1 lb |
| Warranty | 90-Day Limited Manufacturer’s Warranty |
? What’s In The Box
• One (1) 140-3351 Genuine Green Label Air Filter
• Foam pre-cleaner included
Note: This listing is for a single filter element. Refer to your Operator’s Manual for the quantity required per service interval on your specific unit.
? Warranty Information
Backed by a 90-day limited manufacturer’s warranty.
Cummins Power Generation warrants only the quality and integrity of Green Label Parts. Damage caused by the use of non-Green Label air filters is not covered under the Cummins Onan limited warranty.
