Product Overview

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:

• Track chain misalignment
• Excessive travelling vibration
• Abnormal track noise
• Uneven track wear
• Accelerated sprocket and idler wear
• Increased maintenance and downtime

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.

Key Features & Benefits

Broad Compatibility

Suitable for Hitachi:

• ZX330
• ZX330-3
• ZX330-5A
• ZX330-5B
• ZX330-5G
• ZX330-6

Reference genuine part numbers:

• 9168173
• 9253782

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.

• Surface hardness: HRC 52-58
• Hardening depth: 8mm-12mm

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.

Technical Specifications