The Track Roller, also known as Bottom Roller or Lower Roller, is a key undercarriage component installed beneath the track frame of Hitachi ZX330 crawler excavators.
As a 33-ton class excavator component, the track roller operates under substantial load and repeated impact. It supports the track chain, maintains crawler alignment and transfers machine weight to the track system during travelling and excavation.
A worn or damaged track roller may cause:
Our ZX330 track rollers are manufactured according to OEM-style dimensions and production standards, providing a reliable aftermarket replacement solution for construction contractors, equipment dealers and repair workshops.
Broad Compatibility
Suitable for Hitachi:
Reference genuine part numbers:
The correct part number should be confirmed according to the machine generation and serial number.
Heavy-Duty Alloy Steel
Manufactured from high-strength 40Mn2 alloy steel, providing good load-bearing capacity, impact resistance and fatigue resistance.
Advanced Heat Treatment
The tread surface is induction hardened to improve resistance against abrasive materials, rocks, gravel and continuous operating wear.
Reliable Floating Seal
Heavy-duty floating oil seals and wear-resistant bushings help retain lubricant and prevent mud, dust and water from entering the internal bearing area.
Lifetime Lubrication
Factory-filled and sealed for maintenance-free operation under normal service conditions.
OEM-Style Direct Replacement
Manufactured according to OEM-style dimensions with accurate mounting and shaft specifications for bolt-on replacement without modification.
| Item | Specification / Detail |
|---|---|
| Product Type | Excavator Undercarriage Track Roller |
| Applicable Machine Weight | Approx. 33 Ton Class |
| Machine Model | Hitachi ZX330 Series |
| Compatible Generations | ZX330 / ZX330-3 / ZX330-5A / ZX330-5B / ZX330-5G / ZX330-6 |
| Material Grade | 40Mn2 Alloy Steel |
| Manufacturing Process | Forging / Casting + CNC Machining |
| Heat Treatment | Induction Hardening |
| Surface Hardness | HRC 52-58 |
| Hardening Depth | 8mm-12mm |
| Seal System | Heavy-duty Floating Oil Seal |
| Lubrication System | Lifetime Internal Lubrication |
| Bearing Structure | Hardened Shaft + Wear-resistant Bushing |
| Quality Inspection | Dimension, Hardness and Sealing Inspection |
| Flange Type | Single Flange (SF) / Double Flange (DF) |
| Installation | OEM Standard, Bolt-on Direct Replacement |
| Shipping Note | Heavy Component — Sea Freight Recommended |
The Track Roller, also known as Bottom Roller or Lower Roller, is a key undercarriage component installed beneath the track frame of Hitachi ZX330 crawler excavators.
As a 33-ton class excavator component, the track roller operates under substantial load and repeated impact. It supports the track chain, maintains crawler alignment and transfers machine weight to the track system during travelling and excavation.
A worn or damaged track roller may cause:
Our ZX330 track rollers are manufactured according to OEM-style dimensions and production standards, providing a reliable aftermarket replacement solution for construction contractors, equipment dealers and repair workshops.
Broad Compatibility
Suitable for Hitachi:
Reference genuine part numbers:
The correct part number should be confirmed according to the machine generation and serial number.
Heavy-Duty Alloy Steel
Manufactured from high-strength 40Mn2 alloy steel, providing good load-bearing capacity, impact resistance and fatigue resistance.
Advanced Heat Treatment
The tread surface is induction hardened to improve resistance against abrasive materials, rocks, gravel and continuous operating wear.
Reliable Floating Seal
Heavy-duty floating oil seals and wear-resistant bushings help retain lubricant and prevent mud, dust and water from entering the internal bearing area.
Lifetime Lubrication
Factory-filled and sealed for maintenance-free operation under normal service conditions.
OEM-Style Direct Replacement
Manufactured according to OEM-style dimensions with accurate mounting and shaft specifications for bolt-on replacement without modification.
| Item | Specification / Detail |
|---|---|
| Product Type | Excavator Undercarriage Track Roller |
| Applicable Machine Weight | Approx. 33 Ton Class |
| Machine Model | Hitachi ZX330 Series |
| Compatible Generations | ZX330 / ZX330-3 / ZX330-5A / ZX330-5B / ZX330-5G / ZX330-6 |
| Material Grade | 40Mn2 Alloy Steel |
| Manufacturing Process | Forging / Casting + CNC Machining |
| Heat Treatment | Induction Hardening |
| Surface Hardness | HRC 52-58 |
| Hardening Depth | 8mm-12mm |
| Seal System | Heavy-duty Floating Oil Seal |
| Lubrication System | Lifetime Internal Lubrication |
| Bearing Structure | Hardened Shaft + Wear-resistant Bushing |
| Quality Inspection | Dimension, Hardness and Sealing Inspection |
| Flange Type | Single Flange (SF) / Double Flange (DF) |
| Installation | OEM Standard, Bolt-on Direct Replacement |
| Shipping Note | Heavy Component — Sea Freight Recommended |
