Baldwin — Fuel Filter Cartridge — PF311
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The Baldwin PF311 Fuel Filter Element is a cartridge-style diesel fuel filter designed for compatible commercial trucks, transit buses, industrial equipment, and heavy machinery fuel systems. It helps protect diesel injection pumps and injectors by filtering fine particulate contamination before fuel reaches critical fuel system components.
This element is commonly used where the equipment parts manual, existing filter, or verified cross-reference calls for Baldwin PF311.
Key Features
- Baldwin cartridge-style diesel fuel filter element.
- Part number: PF311.
- Designed for compatible diesel fuel filter housings.
- Fine filtration reference: 4 micron nominal / 15 micron absolute.
- Cellulose filter media construction.
- Helps protect fuel injection pumps, injectors, and high-pressure fuel lines from abrasive contamination.
- Compact cartridge design for enclosed fuel filter housings.
- Supplied with rubber grommets and sealing gaskets where packaged.
- Commonly used in commercial truck, industrial, transit, and equipment fuel systems where specified.
Technical Specifications
- Filter type: cartridge diesel fuel filter element
- Part number: PF311
- Media type: cellulose
- Nominal filtration rating: 4 micron reference
- Absolute filtration rating: 15 micron reference
- Overall length: 4-11/32 in. / 110.3 mm
- Outer diameter: 2-7/8 in. / 73.0 mm
- Inner diameter: 9/16 in. / 14.3 mm
- Included seal references: 2 attached rubber grommets and 2 furnished sealing gaskets
- Gasket reference: ES1036
Application Compatibility
Common application context includes equipment and fuel systems where Baldwin PF311 or a verified equivalent is specified, including:
- Select Isuzu medium-duty diesel truck applications.
- Select Hino medium-duty diesel truck applications.
- Hitachi excavator applications where listed.
- Kawasaki wheel loader applications where listed.
- Daewoo industrial equipment applications where listed.
- Transit bus and industrial diesel applications using compatible cartridge-style filter housings.
Use this filter only where the engine model, equipment model, serial number, fuel filter housing, element dimensions, and parts manual confirm compatibility.
Fitment Notice
Confirm fitment by engine or equipment model, serial number, existing filter number, filter housing style, element height, outer diameter, inner diameter, grommet layout, and gasket requirements before ordering. Cartridge fuel filters can look similar but may differ in sealing position, internal flow path, filter length, and housing fit.
Always replace the supplied grommets and gaskets during installation to help prevent air intrusion, fuel seepage, or unfiltered fuel bypass.
When This Part Needs Replacement
Replace the fuel filter element at the manufacturer’s recommended service interval, during scheduled diesel fuel system maintenance, after contaminated fuel exposure, or when the engine shows symptoms such as hard starting, hesitation, smoke, rough running, loss of power, fuel starvation, or stalling under load.
Replacement is also recommended if the element is dirty, collapsed, swollen, damaged, fuel-soaked beyond normal service condition, or if the sealing grommets or gaskets are hardened, flattened, cracked, or missing.
Installation Notes
Shut the engine or equipment down safely and close the fuel supply if equipped. Clean the filter housing before opening it to prevent dirt from entering the fuel system. Remove the old element and all old sealing components, then clean the housing and sealing surfaces.
Install the new element with the supplied grommets and gaskets in the correct positions. Reassemble the housing according to the service procedure, prime and bleed the fuel system as required, then start the engine and inspect carefully for leaks or air intrusion.
Alternate / Cross-Reference Part Numbers
- Baldwin PF311 — primary part number
- Isuzu 9-88511-191-1 — cross-reference reference; verify by application
- Hino 23401-1221 — cross-reference reference; verify by application
- Wix 33391 — cross-reference reference; verify by application
- Fleetguard FF5113 — cross-reference reference; verify by application
- Donaldson P550123 — cross-reference reference; verify by application
Parts Desk Insight
The key checks on this filter are the cartridge dimensions, inner diameter, and sealing grommet layout. If the element does not seat correctly, fuel can bypass the media or the system can draw air. For best results, replace the grommets and gaskets every time the filter housing is serviced.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.