Fitment and Service Notes
The 320D is one of the highest-volume excavators on the used market in Africa, the Middle East and Southeast Asia — which is exactly why radiator fitment matters: the cooling package changed several times across the model's production life. Ordering by machine model alone is how wrong radiators end up on site. The reliable path is the serial number, which ties the machine to its build spec, plus photos of the old unit so we can compare core height, tank shape and bracket positions.
If the old radiator still has a legible number on the tank or core, send it — 312-8338, 481-3475, 265-3624 and 265-3625 all appear on 320D-family machines, and we cross-reference them directly to the correct current unit. Aluminum is the standard core for D-series builds; copper-brass is an option mainly on older machines and costs more (see our aluminium vs copper radiator guide for the trade-offs).
Plan your order around the whole cooling package, not just the radiator: a leaking hydraulic oil cooler or a worn fan clutch will do the same damage to a new radiator that it did to the old one. Typical aftermarket pricing for the 326-3870 runs roughly $90–500 depending on seller and core spec, against an OEM price in the $900–1,800 territory for this size class.
For the broader picture — failure signs, replacement procedure and cost logic — see our Caterpillar radiator guide, the radiator replacement guide and the radiator failure signs guide. If your machine is a 330D or 336D with the C9 engine, the radiator number is 245-9359 — message us and we will confirm the current unit for your serial.
FAQ
Q: Does the 326-3870 radiator fit my Cat 320D?
A: 326-3870 is the common aftermarket radiator for the 320D family and is also listed for the 323D, 324D, 325D and 329. Cat changed radiator numbers across production years, so send your machine serial and we confirm the exact unit for your build before dispatch.
Q: Is this radiator OEM or aftermarket?
A: This is a high-quality aftermarket radiator cross-referenced to OEM 326-3870, typically priced 30–60% below OEM list. The OEM cross-reference is written on the order and fitment is confirmed by serial number before shipping.
Q: What does a Cat 320D radiator cost?
A: Aftermarket listings for the 326-3870 range from roughly $90 to $500 depending on seller and core spec (checked August 2026), against an OEM price in the $900–1,800 territory for this size class. We quote on your serial-confirmed fitment, FOB Shanghai or CIF to your port.
Q: How do I order this radiator from CN Machinery?
A: Message us on WhatsApp or email sales@cn-machinery.com with your machine serial number and photos of the old radiator. Stock items dispatch in 3–7 days, FOB Shanghai or CIF to your port, with payment by T/T.
Need This Radiator for Your Cat?
Send your machine serial and photos of the old radiator — we confirm fitment, quote a price and arrange shipping within 24 hours.
Chat on WhatsApp Email sales@cn-machinery.com