CAT Excavator Parts — 320D, 330D, 336D, 349D Undercarriage, Hydraulic & Engine
How we supply these parts
Woyuant supplies replacement parts for the full Caterpillar excavator range — from the 15-tonne 315D up to the 90-tonne 390F. Our working stock covers hydraulic pumps and main relief valves, travel and swing motors, final drives, undercarriage (track chains, rollers, idlers, sprockets, track shoes), bucket teeth and adapters, engine overhaul kits, injectors, water pumps, radiators, sensors, filters and electrical parts.
Application & fitment
Fitment is confirmed from your machine model and serial range before anything is quoted.
Sourcing & grades
Genuine, OEM-equivalent and premium aftermarket quoted side by side — you choose.
Delivery & export
Air freight, express and sea freight with crating, weights and documents prepared by our export desk.
Quality control
Incoming inspection and dimensional checks against the original part number, photo confirmation before dispatch.
Kits & combined orders
Complete assembly kits and mixed orders with other machines to cut freight per unit.
After-sales
Fitment support, replacement on confirmed quality issues and paperwork for warranty claims.
Fitment and sourcing notes
We are a factory-direct aftermarket supplier: every item is checked against the original CAT part number, cross-referenced against machine serial number ranges, and quoted in three grades — genuine, OEM-equivalent (same production line) and premium aftermarket — so you can match your budget without guessing.
Typical delivery is 1–3 working days from our Guangzhou warehouse for fast-moving numbers, with express air freight to Southeast Asia, the Middle East, Africa, South America and the CIS. Send us a part number, a photo of the old part or your machine serial number and we will come back with availability, grade options and a formal quotation.
Machine models covered
Reference part numbers
| Component | Reference numbers | Confirm with |
|---|---|---|
| Main relief valve | 352-7113 / 352-7116 / 310-0393 | Machine model + S/N |
| Fuel injector (C6.4 / C7) | 326-4700 / 328-2585 / 387-9428 | Machine model + S/N |
| Fuel filter / water separator | 326-1644 / 1R-0750 / 343-5527 | Machine model + S/N |
| Hydraulic main pump | 272-6952 / 272-6953 / 200-3337 | Machine model + S/N |
| Travel motor / final drive | 227-6188 / 168-8451 / 296-6285 | Machine model + S/N |
| Track roller / carrier roller | 171-8746 / 199-9025 / 8E-4675 | Machine model + S/N |
| Idler / sprocket segment | 199-9006 / 6Y-0844 / 147-0915 | Machine model + S/N |
| Bucket tooth & adapter | 1U-3352 / 220-9089 / 6Y-3222 | Machine model + S/N |
FAQ
How do I find the correct CAT part number for my machine?
Do you supply genuine CAT parts or aftermarket?
What is the difference between an OEM-equivalent and a genuine CAT part?
How fast can you ship CAT excavator parts?
Can you help with a full undercarriage or hydraulic rebuild kit?
Quotation within 1 hour
Send a part number, machine model or photo of the old component. We reply with grade options, unit price, crate weight, freight and lead time. No obligation, no spam.