Excavator Parts Compatibility by Brand: Match Your Model

Why Brand-and-Model Matching Beats Part-Number Guessing

A part number looks universal until it isn't. The same injector fits a CAT C7 in an E320D and a C7 in an E330D, but the ECM that controls it changes with the emissions tier. Order by model name alone and you risk a comeback; order by engine family plus serial prefix and the part drops in first time. This guide is the compatibility cheat sheet we use with customers every day — by brand, by engine family, and by the real part numbers XC Machinery stocks for each.

The single rule that prevents most returns: match the engine family first, then the model, then the serial prefix. A Komatsu S6D or a Volvo D6D shares cores across many excavator sizes, so the family is the real key, not the badge on the boom.

The Compatibility Rule: Engine Family, Not Just Model Name

Excavator model names (EC210B, E320D, SK200) describe the machine; the engine family (Volvo D6D, CAT C7, Kubota V2403, Yanmar 4TNV98) describes what actually breaks. hydraulic pumps and seal kits follow the machine; engine internals follow the family. When a customer says "my Volvo EC210B lost compression," the answer is never a generic Volvo kit — it is the D6D liner kit, measured to that block.

Brand-by-Brand Compatibility Map

Brand	Common engine family	Typical models	Key stock numbers
Caterpillar	C7 / C4.4 / C6.4 / C6.6 / C9.3B	E320D, E330D, 312D-323D	387-9427, 10R-7225, 331-7539, C9.3B
Komatsu	S6D / 4D / 6D	PC200, PC300, WA series	Confirm via serial prefix
Volvo	D6D / D6E	EC210B, EC240B, EC460	Volvo D6D liner kit
JCB	4.4 / 444 / 448	3CX, 4CX, JS series	320/09256 crankshaft
Kubota	D1503 / V2403	KX91-3, U35, KX series	1A013-03043 cylinder head
Yanmar	4TNV88 / 4TNV98	VIO, SV, B series	4TNV98 engine assy
Cummins	6BT / 6BT5.9 / ISB5.9	Excavator & generator sets	3928797 cylinder block

How to Read a Part Number Across Brands

CAT numbers are dash-formatted and stable: 387-9427 is the C7 injector, 10R-7225 its reman twin, and 331-7539 the ECM for C4.4/C6.4/C6.6. JCB uses slash form — 320/09256 is the 4.4 crankshaft. Kubota prefixes letters: 1A013-03043 is the D1503 cylinder head. Yanmar and Cummins use family codes: 4TNV98 and 3928797. The brand differs; the logic is identical — dash or slash, then family, then revision. Send us the number and we confirm the cross-brand equivalent.

The 5-Step Fitment Check Before You Buy

1) Write the engine family, not just the model. 2) Note the emission tier (it changes EGR, injectors, ECM). 3) Read the serial prefix off the engine tag. 4) Match the part number to our stock list below. 5) Send all three to us for a free fitment confirmation before payment. Step 5 is free and stops 9 of 10 wrong orders.

Real Part Numbers We Stock for Each Brand

CAT: fuel injector 387-9427 / reman 10R-7225, engine ECM 331-7539, and the C9.3B overhaul repair kit C9.3B. JCB: 4.4 crankshaft 320/09256. Kubota: D1503 cylinder head 1A013-03043. Yanmar: 4TNV98 / 4TNV98T engine assy. Cummins: 6BT cylinder block 3928797. Volvo: the EC-series Volvo D6D liner kit. Every number links to its live product page with specifications and the models it fits — open one and check your serial before ordering.

Common Compatibility Mistakes That Cause Comebacks

Mistake one: buying by machine year alone and missing an emission-tier change. Mistake two: assuming a Komatsu SK200 and SK200-10 share the same internals — they don't. Mistake three: ordering a hydraulic seal kit by pump brand but ignoring the machine's swing vs travel motor split. Each of these sends the part back. The fix is always the same five-step check above, and a 4-hour message to our team with your serial.

Frequently Asked Questions

Q1: Can one part number fit two different brands?

Rarely for the casting, but often for the core component. Many JCB, Kubota and Yanmar mini-excavator engines share Perkins or Yanmar blocks, so a Yanmar 4TNV98 family part may cross to a Komatsu or JCB equivalent. We verify the cross-brand match against your serial before you pay — do not assume it from a photo.

Q2: My model isn't listed — can you still match it?

Yes. Send the engine family and the serial prefix from the tag; we map it to the correct family kit. For Volvo we confirm the D6D vs D6E variant, for CAT the C7 vs C9.3B bore, and for Komatsu the S6D revision. The map above is a starting point, not a ceiling.

Q3: Do you guarantee fitment?

We confirm fitment against the serial you provide and ship with part-level test data — CAT C7 injectors 387-9427 / 10R-7225 include flow-balance results, and the C9.3B kit C9.3B ships with measured liner bore and ring gap. If the serial check passes, the part fits; if it can't, we tell you before payment.

Conclusion — Send Your Model, Get the Right Number

Compatibility is a process, not a guess. Match the engine family, read the serial, and confirm with our team — then order CAT injectors 387-9427 / 10R-7225, ECM 331-7539, C9.3B kit C9.3B, JCB crankshaft 320/09256, Kubota head 1A013-03043, Yanmar 4TNV98 assy, Cummins block 3928797 or Volvo Volvo D6D kit with confidence. Message us on WhatsApp or request a quote and we reply within 4 hours with fitment confirmation and the best-cost path for your machine.