If you run a mixed fleet of New Holland and John Deere tractors, you already know the frustration of maintaining two entirely separate parts inventories. The good news is that many common service components (filters, seals, bearings, O-rings) are either shared between the two brands or have direct equivalents. The bad news is that neither manufacturer makes this easy to find out.

This guide maps the most commonly cross-referenced parts between New Holland and John Deere. It covers where genuine interchangeability exists, where aftermarket equivalents bridge the gap, and where you should not attempt to cross-reference at all. It is written from a parts supplier's perspective. We cross-reference across brands every day and know where the overlaps are and where they stop.

Call 01673 828 883 or email [email protected] if you already have a part number and want to know the equivalent. Otherwise, read on to see what crosses over and what does not.

1 Which parts are genuinely cross-compatible between NH and JD?

Not everything crosses over, and assuming it does can be expensive. Here is a straightforward breakdown of what typically has equivalents and what does not.

The general rule: the more "universal" a component is (filters, seals, bearings), the more likely it crosses over. The more "proprietary" it is (engine internals, electronics, hydraulic valves), the less likely.

2 Oil filters: NH to JD and JD to NH cross-reference

Oil filters are the most commonly cross-referenced part between New Holland and John Deere. Both brands source many of their spin-on oil filters from the same OEM filter manufacturers (principally Mann, Donaldson, and Fleetguard). The result is that a New Holland branded filter and a John Deere branded filter sometimes contain identical filter media and bypass valve specifications, just in different coloured cans.

Aftermarket oil filters from Donaldson, Fleetguard, Mann, and Hifi are typically 30% to 50% cheaper than genuine branded filters and use identical or equivalent filter media. For routine service intervals, they are a perfectly sound choice. For more detail on when genuine parts matter, see our OEM vs aftermarket guide.

3 Fuel filters: equivalents across both brands

Fuel filters cross-reference well between New Holland and John Deere, particularly the spin-on secondary (final) fuel filters. The primary fuel filter (water separator) is more model-specific, but aftermarket equivalents still exist for most common tractors.

For a full breakdown of filter cross-references across all major brands, see our tractor filter cross-reference guide.

4 Air filters: where they share and where they differ

Air filters are a mixed picture. The outer (primary) air filter element crosses over between brands more often than you might expect, because both New Holland and John Deere use standard Donaldson or Mann air filter housings on many models. The inner (safety) element is more variable.

Where they differ: Larger New Holland models (T7 HD T9) and larger John Deere models (8R 9R) use completely different air cleaner housings. There is no cross-reference between these. Compact and utility models also diverge. The strongest overlap is in the mid-range (100 to 200 hp) tractors where both brands have historically used similar air cleaner designs.

5 Hydraulic seals and O-rings: universal vs brand-specific

Hydraulic seals and O-rings sit in two categories. Standard metric seals and O-rings (sized by ID, OD, and cross-section) are completely interchangeable between brands. Brand-specific seal kits for particular rams or valves are not.

What crosses over

• O-rings: Standard metric O-rings (measured by inside diameter and cross-section) are universal. An O-ring sized 25 x 3mm fits any application requiring that size, regardless of brand. Buy by measurement, not by tractor brand.
• Piston seals and rod seals: Standard metric hydraulic seals (U-cups, wipers, buffer seals) in common sizes cross over between brands. If the ram bore and rod diameter match, the seal fits.
• Dowty washers and bonded seals: Completely universal. Sized by BSP or metric thread size.

What does not cross over

• Valve spool seals and cartridge seals: These are specific to the valve design. A seal kit for a New Holland SCV valve block will not fit a John Deere SCV valve block, even if both are "electronic remotes."
• Complete ram seal kits: While individual seals within the kit may be standard sizes, the combination and arrangement is specific to the ram design. A kit labelled for a NH T6 loader ram will not fit a JD 6R loader ram.

When ordering seals for a specific ram or valve, the safest approach is to provide the ram part number or the tractor model and serial number. We match the correct seal kit from there.

6 Why serial numbers matter more than model numbers for part matching

This is where most cross-referencing goes wrong. Two tractors with the same model name can use different components depending on when they were built, where they were built, and what specification they were ordered in.

A New Holland T6.180 built in 2018 may use a different oil filter to a T6.180 built in 2021 if the engine specification changed between production runs. The same applies to John Deere. A 6155R built at Mannheim may use different filters to a 6155R built at Augusta.

When contacting us for a cross-reference, always have the serial numbers of both tractors to hand. On New Holland tractors, the serial number plate is on the right-hand side of the frame near the front axle. On John Deere tractors, it is on the right-hand side of the frame, typically near the front axle or on the identification plate inside the cab door.

7 How to tell us what you need

Call 01673 828 883 or email [email protected] with the following and we will cross-reference across brands for you.

1. Tell us what you are trying to match. Give us the part number you have (NH or JD) and tell us which tractor you want the equivalent for.
2. Provide both serial numbers. The serial number of the tractor the part currently fits, and the serial number of the tractor you want it to fit.
3. Let us check. We cross-reference across brands every day using OEM catalogues, aftermarket databases, and our own experience. We confirm the match before dispatching anything.

We hold filters, seals, bearings, and service parts for both John Deere and New Holland tractors. Most stock items dispatch same day. If a part is not on the shelf, we source it within 48 hours.