This oil filter is designed to keep your RV generator running smoothly. Compatible with Onan generator models HDKAH, HDKAK, HDKAJ, HQDPA, HQDPC, and HDKBA, it replaces the 185-5409 filter. Made to fit Cummins Onan RV QD 3200, RV QD 6000/8000 series, RV QD 10000/12500 series, and older Onan Diesel Generators, this filter ensures efficient operation. It also fits Kubota Lawn Garden Tractors G2/HST and G3/HST, as well as CASE 204149A1, DONALDSON P55-0726, MC CORMICK 390963700, PRINS MOTOREN, and UFI 2326200 models. Protect your generator's performance with this high-quality replacement filter.