Genuine Cummins Onan Green Label spin-on oil filter with bypass valve for MDKBH, MDKBJ, and MDKBW Quiet Diesel generators. Always verify fitment from your generator nameplate before ordering.
The Cummins Onan 185-7444 is the OEM-specified spin-on oil filter for the MDKBH, MDKBJ, and MDKBW Quiet Diesel generator series. It features an integrated bypass valve that allows oil to flow during cold starts or if the element becomes restricted — a critical feature on diesel generators where oil pressure starvation from a clogged non-bypass filter can lead to engine damage.
As a Genuine Green Label Part, this filter is designed and tested to exact Cummins Onan specifications. Non-Green Label "will-fit" filters frequently lack bypass valves — Cummins Onan cautions that engine damage caused by the use of non-Green Label filters is not covered under the generator warranty.
Integrated bypass valve prevents oil starvation during cold starts and filter restriction — non-bypass filters cause elevated pressure, failed gaskets, and engine damage
Designed and tested specifically for Cummins Onan Quiet Diesel generators — meets original lubrication specifications
Standard spin-on filter for straightforward service — no special tools required beyond a filter wrench
Damage from non-Green Label filters is not covered under the Cummins Onan warranty — genuine parts protect warranty coverage
The 185-7444 is specified for the MDKBH, MDKBJ, and MDKBW Quiet Diesel generator series per the Cummins Quiet Diesel service documentation. It is not the correct filter for RV QD Series generators (HDKAH, HDKAJ, HDKAK, HDKBA, HQDPA, HQDPC) — those models use 122-0833. Always confirm the correct filter by locating the full model and spec number on your generator's identification nameplate and cross-referencing your Operator's Manual or the Cummins Green Label Parts Reference Guide before ordering.
Oil filter replacement intervals vary by generator model and operating conditions. Always refer to the Operator's Manual for your specific MDKBH, MDKBJ, or MDKBW model for the correct service interval. The Cummins Green Label Parts Reference Guide does not cover the MDKB marine series — consult the model-specific service documentation.
Backed by a 90-day limited manufacturer's warranty against defects in materials and workmanship. Cummins Power Generation warrants only the quality and integrity of Green Label Parts. Damage caused by the use of non-Green Label filters is not covered under the Cummins Onan limited warranty.