Caterpillar C7, C12, C13 & C15 Filter Cross Reference Guide

Finding the correct filter for a Caterpillar diesel engine doesn't have to be difficult. Whether you're servicing a CAT C7, C12, C13, or C15, having the correct filter part number and a reliable Caterpillar filter cross reference can save time and help you get the parts you need.

At Hawhee Truck Repair, we work with heavy-duty trucks, diesel engines, trailers, and equipment every day. We've put together this CAT filter cross reference guide to help you identify common oil, fuel, water separator, and air filter numbers for some of the most popular Caterpillar engines.

Important: Filter fitment can vary by engine serial number, arrangement number, fuel-system configuration, truck chassis, equipment model, and air-cleaner housing. Always verify the application before installing a replacement filter.

Caterpillar Filter Cross Reference Chart

The following chart includes commonly used Caterpillar filter numbers and potential equivalents from popular aftermarket filter manufacturers.

CAT C7 Filter Cross Reference

The Caterpillar C7 is widely used in heavy-duty trucks and equipment.

One commonly encountered C7 oil filter is the CAT 1R-1808. Depending on the specific application, potential aftermarket equivalents include Baldwin B7299, Fleetguard LF691A, Donaldson P551808, and WIX 57792.

Fuel filtration is more application-specific. The CAT 1R-0751 is commonly associated with C7 applications, while other fuel-filter configurations can be found depending on the engine arrangement.

When ordering a C7 filter, having the engine serial number available is the best way to verify the correct part.

Common C7 Filter Numbers

Oil Filter: CAT 1R-1808

Fuel Filter: CAT 1R-0751

Fuel/Water Separator: CAT 326-1644

Air Filter: Application dependent

CAT C12 Filter Cross Reference

The Caterpillar C12 is a popular heavy-duty diesel engine found in trucks and other commercial applications.

The CAT 1R-1808 is commonly used as an oil filter on C12 applications. Fuel filtration can vary, with 1R-0750 and 1R-0749 being examples of fuel filter numbers encountered on C12 applications.

Common C12 Filter Numbers

Oil Filter: CAT 1R-1808

Fuel Filter: CAT 1R-0750 / 1R-0749

Fuel/Water Separator: CAT 326-1644

Air Filter: Application dependent

Because C12 configurations can vary, verify the engine serial number before ordering.

CAT C13 Filter Cross Reference

The Caterpillar C13 is another extremely common heavy-duty diesel engine, particularly in commercial trucks.

The CAT 1R-1808 is a commonly used oil filter, while 1R-0749 and 1R-0762 are examples of fuel-filter numbers used in C13 applications.

Air filtration is more dependent on the specific truck or equipment's air-cleaner housing.

Common C13 Filter Numbers

Oil Filter: CAT 1R-1808

Fuel Filters: CAT 1R-0749 / 1R-0762

Fuel/Water Separator: CAT 326-1644

Air Filter: CAT 3I-1456 / 246-5009 depending on application

Safety Air Filter: CAT 246-5010 on applicable air-cleaner systems

CAT C15 Filter Cross Reference

The Caterpillar C15 is one of the most recognizable Caterpillar heavy-duty engines and was used in numerous truck and equipment applications.

A common C15 oil filter is the CAT 1R-1808.

For fuel filtration, 1R-0749 and 1R-0762 are examples of numbers found in C15 applications.

Common C15 Filter Numbers

Oil Filter: CAT 1R-1808

Fuel Filters: CAT 1R-0749 / 1R-0762

Fuel/Water Separator: CAT 326-1644

Air Filter: CAT 3I-1456 / 246-5009 depending on application

Safety Air Filter: CAT 246-5010 on applicable systems

Why You Should Use a Filter Cross Reference

A heavy-duty filter cross reference is especially useful when your preferred filter brand isn't available.

For example, you may have a Caterpillar part number but want to purchase a Baldwin, Fleetguard, Donaldson, or WIX filter instead.

A cross-reference can help you:

• Find replacement filters faster
• Compare different filter brands
• Find aftermarket alternatives
• Identify obsolete or difficult-to-find filters
• Stock filters for multiple trucks
• Reduce downtime
• Simplify fleet maintenance
• Find the correct heavy-duty filter

However, a cross-reference number should always be verified before installation.

Don't Choose a Filter Based on Size Alone

One of the biggest mistakes when replacing a heavy-duty filter is assuming that two filters are interchangeable because they look similar.

A filter can have similar dimensions but different:

• Thread size
• Gasket dimensions
• Bypass valve settings
• Pressure ratings
• Filtration efficiency
• Flow characteristics
• Dirt-holding capacity
• Application requirements

For this reason, filter cross references should be used as a starting point for identification, not as a substitute for application verification.

How to Find the Correct CAT Filter

If you need help finding a filter for your Caterpillar engine, gather as much information as possible.

For a CAT C7, C12, C13, or C15, provide:

• Engine model
• Engine serial number
• Arrangement number
• Truck year
• Truck make
• Truck model
• VIN
• Existing filter number

If you have the old filter, take a picture of the label or part number.

This information can help us determine the correct filter and identify potential aftermarket cross references.

Caterpillar Filter Cross Reference by Brand

Many customers have a preferred filtration brand.

At Hawhee Truck Repair, we commonly work with major heavy-duty filtration brands including:

Baldwin Filters

Baldwin offers a large selection of filters for heavy-duty diesel engines and commercial trucks.

Common examples in this guide include B7299, BF7632, BF7633, BF7587, BF7753, and RS3518.

Fleetguard Filters

Fleetguard is another major name in heavy-duty filtration.

Common numbers include LF691A, FF5324, FF5320, FF5319, FF5624, AF25139, and AF26207.

Donaldson Filters

Donaldson produces filtration for trucks, diesel engines, construction equipment, agriculture, and industrial applications.

Examples include P551808, P551315, P551313, P551311, P550625, P527682, and P781098.

WIX Filters

WIX also offers filtration for commercial and heavy-duty applications.

Examples in this guide include 57792, 33626, 33528, 33674, 33640, 46556, and 42847.

Need a Heavy Duty Truck Filter Cross Reference?

If you're searching for a heavy duty filter cross reference, truck filter cross reference, or a replacement for a Caterpillar filter, Hawhee Truck Repair can help.

Whether you're working on a:

• Caterpillar C7
• Caterpillar C12
• Caterpillar C13
• Caterpillar C15
• Heavy-duty truck
• Construction equipment
• Agricultural equipment
• Diesel-powered equipment

Start with your existing filter number or engine information.

Don't guess on filtration. Verify the application and use the correct filter for your engine.

Shop Heavy-Duty Filters at Hawhee Truck Repair

Looking for filters for your Caterpillar engine?

Visit hawheetruckrepair.com to browse our selection of heavy-duty filters, diesel parts, truck parts, and equipment parts.

Hawhee Truck Repair — Heavy-Duty Parts, Filters & Service.