John Deere Fuel Filters: Which One Fits Your Machine

A John Deere 1025R has two fuel filters: inline filter AM116304 and fuel filter MIU804763, both due every 400 hours and annually according to Deere's replacement parts guide. Many larger Deere diesels also run two stages, but the names change from guide to guide, so the surest way to match any John Deere fuel filter is the number on the old one plus your serial number.

The Essentials

• Two stages on many diesels: a primary filter or water separator that stops water and coarse dirt, and a final (secondary) filter that removes fine particles before the injection system.
• Names vary by model: the same part can be a "fuel filter" in one Deere guide and a "primary fuel filter" in another, so shop by number, not by name.
• Serial breaks matter: on the 3032E, both the fuel filter and the separator element change at serial number DH610001; on the 3038E, the fuel filter does.
• Intervals from Deere's guides: 400 hours (and annually) on the 1025R, 2038R, 3E and 4052R cards; 500 hours on the 324G skid steer card.
• AM116304 is Deere's inline fuel filter for lawn tractors, Gators and the 1025R, 2025R and 2026R.

What Do the Primary and Final Fuel Filters Do?

They split the work. The primary filter sits early in the fuel path and deals with water; Deere describes its primary filters as using "a coated media that effectively traps and repels water, promoting clean fuel and reducing rust and microbial growth." The final filter is the last stage before the injection pump and injectors, and it catches the fine particles the primary lets through.

• Primary filter / water separator: separates water and coarse debris. On some machines it is a cartridge inside a separator housing.
• Final (secondary) filter: fine filtration. Deere rates its RE62419 final filter at 5 microns and says it "helps remove fine contaminants from fuel."
• Inline filter: a small filter spliced into the fuel line, common on lawn tractors and some compact tractors.

Deere's product copy for its final filters also notes they help protect "fuel injectors and fuel pumps, from clogging and premature wear." That is why replacing only the easy-to-reach primary is a false economy.

Which Fuel Filters Does a John Deere 1025R Use?

Deere's Replacement Parts Guide for the 1025R lists two fuel filters, and both editions of the guide (serial numbers up to HJ100000, and HJ100001 onward) agree:

Deere's guide pictures AM116304 as a small clear-bodied inline filter and MIU804763 as a cartridge element. Deere also bundles both into the 1025R filter paks (LVA21036 for earlier serials, TA15270 from serial JJ153037), together with the oil, hydraulic and air filters. Neither fuel filter number is in our catalog today, so treat the guide as your shopping list, or email your serial number to sales@partsonline.com and we will tell you what we can match.

What Is the John Deere AM116304 Fuel Filter?

AM116304 is Deere's inline fuel filter. Deere's own parts listing gives it as 1.4 inches high by 3.9 inches long and shows more than 250 compatible John Deere models.

• Lawn and garden: X, L, LA, GT and Z series lawn tractors and mowers
• Compact utility tractors: 1025R, 2025R and 2026R
• Other equipment: Gator utility vehicles, snow blowers and small engines such as 12.5, 14 and 17 HP models

Inline filters are directional. Install the new one with the flow arrow pointing toward the engine, which is general practice rather than something Deere's product page states.

How Does a Fuel/Water Separator Work on a John Deere?

Water is heavier than diesel, so a separator gives it somewhere to settle before it reaches the fine filter and the injection system. How Deere packages it depends on the machine, as its replacement parts guides show:

• 3032E (serial DH610001 onward), 3038E and 4052R: a separate "fuel/water separator" assembly with filter element MIU802421, plus a separate fuel filter (a spin-on MIU803127 on the 4052R).
• 324G skid steer: MIU802421 is listed as the "primary fuel filter and water separator," with MIU805005 as the final fuel filter.
• Final filters with a drain: Deere says its RE62419 media "effectively removes water, allowing it to be drained out from the bottom."

A Deere dealer notes that "some Deere systems use a drain plug or valve located on the bottom of the primary filter or separator bowl." Your operator's manual gives the draining procedure and how often to check for water on your model.

Why Do Deere's Filter Names Change From Model to Model?

Because each guide is written for one machine. Read across Deere's own cards and the same two part numbers carry different labels:

The lesson: ordering "the primary filter" for your tractor can go wrong, while ordering by the number printed on the old filter rarely does. Deere's parts site also shows older numbers rolling into newer ones, for example M811031 now listing MIU800645 as its substitute.

How Do I Find the Right John Deere Fuel Filter Number?

Work from the machine you actually have, in this order:

1. Read the old filter. The OEM or cross-reference number on the canister or element is the fastest match.
2. Find your serial number. Filters change at serial breaks, such as DH610001 on the 3E series. Our guide to finding the serial number on a John Deere tractor shows where the plate is.
3. Check Deere's replacement parts guide or operator's manual. Each guide lists the filter numbers for that model, with the serial range for each.
4. Check the engine model when a listing gives fitment by engine, such as the 3029 or 6068 engines.

Our walkthrough of the John Deere parts catalog covers looking up any part by model, and the John Deere oil filter cross-reference guide uses the same method for oil filters. It is the customer's responsibility to verify part compatibility before purchasing, and we are happy to help: send your model and serial number to sales@partsonline.com.

How Often Should John Deere Fuel Filters Be Changed?

Deere sets the interval per model, so use your own machine's guide. These are the intervals printed on the Deere replacement parts guides we reviewed:

Replace both stages together so a tired final filter is not left behind. Change sooner whenever you find water in the separator or have filled from a doubtful tank.

Which John Deere Fuel Filters Do We Carry, and What Do They Fit?

Our catalog carries aftermarket fuel filters for many John Deere machines, each designed to meet or exceed OEM specifications. Listings that share one filter are grouped below. The fitment is exactly what each listing shows, and part numbers can vary by serial number, so verify yours before ordering.

The most-requested replacements, by machine family:

• 2R and early 3E compact tractors: Primary Fuel Filter, replacement for John Deere MIU800645
• Separator element for 3E, 4R and G-series skid steers: Fuel Filter, replacement for John Deere MIU802421
• Final filter for G and E-series skid steers and track loaders: Fuel Filter, replaces John Deere MIU805005
• 5E utility tractors: Fuel Filter, replacement for John Deere R536698, which Deere's 5E guide lists as the 5075E fuel filter
• Tractors such as the 6400 and 7810: Final Fuel Filter, replacement for John Deere RE62419
• 6R and M-series tractors such as the 6155R and 5100M: Fuel Filter with Water Separator, replaces John Deere RE562138

One pair to check carefully: the 320G and 324G appear under two filter sets in our listings. Deere's 324G guides for PIN J328658 and later list MIU802421 and MIU805005, so read the old filters and your PIN before ordering. Browse everything in John Deere parts.

What Are the Signs of a Clogged Fuel Filter?

A restricted filter starves the engine when it needs fuel most. A John Deere dealer lists these symptoms:

• Reduced power under load: the engine idles fine but bogs when working
• Sputtering or hesitation when you open the throttle
• Hard starting or failure to start
• Higher fuel use than normal

Air leaks, a weak transfer pump and bad fuel cause similar symptoms. The filters are the cheapest place to start, and water in the separator points straight at the fuel supply.

Is It Easy to Change a Diesel Fuel Filter?

For most owners, yes. The work is simple; the care is in keeping dirt out and getting air out afterwards. A general sequence:

1. Park on level ground, stop the engine, let it cool and remove the key.
2. Clean around the filter head, set a drain pan underneath and catch all fuel.
3. Remove the old filter or element and compare its number with the new one.
4. Fit new seals or O-rings, lubricate them lightly with clean diesel and install the filter as your manual directs.
5. Remove air from the system using the method in your operator's manual, then start the engine and check every fitting for leaks.

Bleeding differs by machine: a Deere dealer notes that "some systems require manual bleeding, while others are self-bleeding." Diesel is flammable and the injection side runs at very high pressure, so never open high-pressure lines; consult a certified mechanic if the engine will not prime.

Frequently Asked Questions

Is it easy to change a diesel fuel filter?

Usually, yes. Keep dirt out, catch the fuel and remove air afterwards by the method in your operator's manual, since some systems bleed themselves and others need manual bleeding.

How to check a fuel filter on a lawn mower?

Find the inline filter in the fuel line between the tank and the engine and look for dirt, debris or water if the body is see-through. Replace it at the interval in your operator's manual, with the flow arrow pointing toward the engine.

How to change the fuel filter on a John Deere 1025R tractor?

Deere's 1025R guide lists two fuel filters: inline filter AM116304 and fuel filter MIU804763, both replaced every 400 hours and annually. Follow the replacement and air-removal steps in your 1025R operator's manual.

Where is the hydraulic filter located on a John Deere tractor?

It varies by model, so use the diagram in your tractor's Deere replacement parts guide or operator's manual. On a 1025R, Deere lists hydraulic filter LVA16054, replaced after the first 50 hours and then every 200 hours.

Does a John Deere fuel filter have a water separator?

Many do. The 3038E and 4052R use a separate fuel/water separator with element MIU802421, while the 324G guide lists MIU802421 as its "primary fuel filter and water separator."

How do I cross-reference John Deere filters?

Start with the number printed on the old filter, then confirm it against your serial number in Deere's replacement parts guide for your model. Email both to sales@partsonline.com and we will check the match.

Is there a John Deere 1025R fuel filter diagram?

Yes. Deere's Replacement Parts Guide for the 1025R is a one-page diagram of the tractor with a leader line to each filter, including AM116304 and MIU804763. The operator's manual covers the replacement procedure.