The Onan 122-0836 oil filter is widely used in Cummins Onan RV and commercial generators. It is designed to provide reliable filtration, protect engine components from contaminants, and maintain proper oil flow under varying operating conditions.
Below is a clean cross-reference guide showing equivalent oil filters that can replace the Onan 122-0836.
Onan 122-0836 Oil Filter Cross Reference
| Brand | Part Number |
|---|---|
| Onan | 122-0836 |
| WIX | 57398 |
| Napa Gold | 7398 |
| Baldwin | B7238 |
| Fleetguard | LF16165 |
| Fram | PH10027 |
| Carquest | 84398 |
| Hastings | B7238 |
| Luber-Finer | PH2875 |
| Champion Laboratories | PH2875 |
| K&N | HP-8029 |
| HIFI Filter | SO10071 |
| Baldwin | B7039 |
| WIX | 57356 |
| Fleetguard | LF16035 |
| Napa Gold | 7035 |
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Commonly Used Replacement Filters
Several filters are widely accepted as reliable replacements for the Onan 122-0836. These are preferred due to their quality, durability, and compatibility with RV generator systems.
WIX 57398
- IDEAL FOR SYNTHETIC AND HIGH-MILEAGE OILS: Designed to handle the demands of normal to extreme driving conditions like t…
- 99% DIRT TRAPPING EFFICIENCY: Advanced blended media captures microscopic particles with 99% efficiency at 26 microns, h…
- EXTENDED SERVICE LIFE: Meets or exceeds OE standards, lasting up to 15,000-miles
The WIX 57398 is one of the most popular replacements. It is known for strong filtration media, durable construction, and consistent oil flow performance. Many RV owners choose it as a direct substitute.
Napa Gold 7398
- Our HD Oil Filters Feature a Cellulose/Poly Media w/ Contaminant Holding Capacity That Out Performs Many of Our Top Comp…
- Various Onan Applications
The Napa Gold 7398 is closely related to the WIX 57398 since both are manufactured to similar standards. It offers reliable filtration and long service life, making it a trusted alternative.
Fleetguard LF16165
- LF16165 Fleetguard, Cummins Onan 122-0836 (Pack of 2), Replaces Cummins Onan 1220836
- Replaces: Cummins Onan 122-0836
- Overall Height 111.811mm (4.402 inch) / Largest OD 68.199mm (2.685 inch) / Gasket OD 62.23mm (2.45 inch)
Fleetguard is a Cummins-associated brand, making this filter a strong OEM-quality alternative. It is commonly used in heavy-duty and diesel generator applications.
Baldwin B7238
- Keep contaminants causing damage, away from the sensitive parts of the engine
- Gaskets provide exterior seal between the filter and engine
- Highly durable and reliable
The Baldwin B7238 is designed for heavy-duty performance. It features a strong housing and high dirt-holding capacity, making it suitable for demanding environments.
Fram PH10027
The Fram PH10027 is a widely available aftermarket option. It is suitable for general use and routine generator maintenance.
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What the Onan 122-0836 Filter Is Used For
The Onan 122-0836 filter is primarily used in Cummins Onan generator sets, especially RV and commercial models. These include:
- HGJAA series
- HGJAB series
- HGJAC series
- HGJAD series
- HGJAE series
- HGJAF series
- HDKA series
- Quiet Diesel (QD) generators
- KY series generators
These generators are commonly found in RVs, motorhomes, mobile commercial units, marine applications, and backup power systems.
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Why Cross-Referencing Is Important
Cross-referencing oil filters allows users to find suitable replacements when the OEM filter is unavailable or expensive. A proper cross-reference must match:
- Thread size
- Gasket diameter
- Filter height
- Oil flow capacity
- Bypass valve settings
Even when filters appear similar, specifications must always be verified to ensure correct fit and safe operation.
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OEM vs Aftermarket Filters
OEM Onan Filters
OEM filters are specifically designed for Cummins Onan generators. They are tested to meet factory specifications for:
- Oil pressure regulation
- Filtration efficiency
- Engine compatibility
- Bypass valve accuracy
They offer the highest assurance of correct performance.
Aftermarket Filters
High-quality aftermarket filters can perform equally well when properly matched. Trusted brands like WIX, Fleetguard, and Baldwin are commonly used in place of OEM filters.
Advantages include:
- Lower cost
- Easy availability
- Multiple brand options
- Comparable performance (when quality brands are used)
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Recommended Replacement Intervals
The oil filter for Onan generators should generally be replaced:
- Every 150 to 250 operating hours, or
- At least once per year
The exact interval depends on load conditions, operating environment, and generator usage patterns.
Signs the Oil Filter Needs Replacement
Common indicators include:
- Dirty or dark engine oil
- Reduced generator performance
- Low oil pressure warnings
- Increased engine noise
- Hard starting conditions
- General wear after extended use
Replacing the oil filter regularly helps maintain engine health and prevent internal damage.
Installation Tips
When installing a replacement for the Onan 122-0836 oil filter:
- Lightly oil the rubber gasket before installation
- Tighten by hand only
- Do not overtighten
- Ensure proper seating of the gasket
- Check for leaks after starting the engine
- Use the recommended engine oil type
Proper installation is essential for preventing leaks and ensuring stable oil pressure.
Final Thoughts
The Onan 122-0836 oil filter has several reliable cross-reference replacements available across major brands. The most trusted options include WIX 57398, Napa Gold 7398, Fleetguard LF16165, Baldwin B7238, and Fram PH10027.
Choosing a high-quality replacement ensures proper engine protection, stable oil flow, and long generator life. Always confirm compatibility with your specific Onan generator model before installation.
