4448400 Bucket Cylinder Seal Kit for Hitachi ZX200 / ZX210 / ZX225US / ZX225USR Excavators
4448400 is an aftermarket bucket cylinder seal kit for Hitachi ZX-series excavators. Independent catalogs list the application and dimensions as follows: HerculesUS (HIT-4448400-EX): ZX200 bucket cylinder, 80 mm rod × 115 mm bore; YearnParts: ZX200 / ZX225US / ZX225USR, 80 mm rod × 115 mm bore; FridayParts: ZX200 / ZX210 / ZX225US / ZX240 / ZX360W-3; additional listings add ZAX200-1, ZAX200-6, EX200-6, ZAXIS200-3, ZAXIS225USLC(-3) and ZX225US-3 (eBay, SealsHydraulic).
Because dimension data in the previous version of this page (105 mm / 75 mm) does not match independent catalogs (115 mm bore / 80 mm rod), the dimensions are listed here as reference only — measure your cylinder before ordering. No pressure, temperature or cycle-life ratings are claimed; request the material data sheet and confirmed component list from our sales team at [email protected].
Verified Specs
| Parameter | Value / Verification |
| Part Number | 4448400 — HerculesUS, YearnParts, FridayParts, eBay |
| Brand / Machine | Hitachi excavators — Multiple suppliers |
| Cylinder Application | Bucket cylinder — Multiple suppliers |
| Rod Diameter (reference) | 80 mm — HerculesUS, YearnParts |
| Bore Diameter (reference) | 115 mm — HerculesUS, YearnParts |
| Condition | New, aftermarket replacement — Multiple suppliers |
Confirmed / Reference Fitment
•Confirmed (≥2 independent sources): ZX200 (HerculesUS, YearnParts, FridayParts, eBay); ZX225US / ZX225USR (YearnParts, FridayParts, SealsHydraulic); ZX210, ZX240 (FridayParts + SealsHydraulic for ZX225 family); ZAX200-1, ZAX200-6 (eBay).
•Reference (single source): ZX360W-3 (FridayParts); EX200-6, ZAXIS200-3, ZAXIS225USLC(-3), ZX225US-3 (SealsHydraulic).
Fitment Checklist
1.Machine model: confirm the full model designation (e.g. ZX200-3, ZX210, ZX225US, ZX225USR).
2.Cylinder position: Bucket.
3.Measure rod ≈ 80 mm and bore ≈ 115 mm (catalog reference) — confirm with calipers.
4.Look for the P/N 4448400 on your old kit or parts list.
5.Send the machine S/N for a fitment double-check.
When to Inspect / Replace
•Oil film or drips at the bucket cylinder gland.
•Bucket drift or slow curl/dump movement.
•Scored rod or contaminated oil.
The bucket circuit is exposed to the most contamination — inspect the rod surface and wiper condition before resealing.
Wholesale & MOQ
Factory-direct supply for distributors, repair shops and fleet operators. Wholesale MOQ: 5 kits. Email [email protected] with your quantity, shipping port and destination for a same-day quote. Custom packaging and private labeling available.
FAQ
Which models does 4448400 fit? — Multiple catalogs list ZX200, ZX210, ZX225US, ZX225USR, ZX240; additional listings add ZAX200-1/-6, EX200-6 and ZAXIS200-3. Confirm your exact model and cylinder before ordering.
The dimensions on the old page said 105 mm / 75 mm — which is right? — Independent catalogs (HerculesUS, YearnParts) list 80 mm rod × 115 mm bore for 4448400. The old page figures could not be verified — measure your cylinder to be certain.
Do you supply kits for the boom or arm cylinders of these machines? — Yes — related Hitachi kits (e.g. 4448398 boom) are available. Email [email protected] with your model and S/N.
Hitachi ZX200 seal kit
4448400
Hitachi bucket cylinder seal kit
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