Product Overview

The Track Roller — also known as Bottom Roller or Lower Roller — is a critical undercarriage component installed beneath the track frame of Doosan DX225 crawler excavators.

The bottom roller carries the machine operating weight, supports the track chain and keeps the crawler system aligned during travelling and excavation operations.

For a 22-ton class excavator, track rollers operate under heavy working conditions:

• High machine loading
• Continuous impact from uneven terrain
• Rock and gravel abrasion
• Mud, dust and water exposure

A worn or damaged track roller may cause:

• Track chain misalignment
• Increased travelling vibration
• Uneven track wear
• Accelerated sprocket and idler wear
• Higher maintenance costs

Our Doosan DX225 track rollers are manufactured according to OEM-style drawings and heavy-duty production standards, providing reliable aftermarket replacement solutions for construction companies, equipment dealers and repair workshops.

Key Features & Benefits

Wide Compatibility

Designed for:

• Doosan DX225
• Doosan DX225LC
• Doosan DX225LCA
• Doosan DX225LC-3
• Doosan DX225LC-7
• Doosan DX220 series

Reference OEM numbers:

• 200104-00021
• 200104-00044
• 2270-1098
• K1037713A

Single & Double Flange Options

Available configurations:

• Single Flange (SF)
• Double Flange (DF)

Suitable for different positions on the track frame.

Heavy-Duty Alloy Steel Construction

Manufactured from:

40Mn2 Alloy Steel

Advantages:

• High load-bearing capacity
• Excellent impact resistance
• Strong fatigue resistance
• Long service life

Advanced Heat Treatment

The roller tread surface is induction hardened:

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

Improves resistance against:

• Rock impact
• Sand abrasion
• Heavy continuous operation

Reliable Floating Seal System

Equipped with:

• Heavy-duty floating oil seals
• Premium bushings
• Lifetime lubrication system

Designed to prevent:

• Oil leakage
• Mud intrusion
• Internal bearing damage

OEM-Style Direct Replacement

Manufactured with:

• Accurate roller diameter
• Correct shaft dimensions
• Standard mounting structure

Provides direct bolt-on installation without modification.

Technical Specifications

Why Trust Our Undercarriage Solutions?

For a 22-ton class excavator like Doosan DX225, undercarriage parts directly influence machine productivity and operating cost.

A reliable track roller helps:

• Maintain crawler stability
• Reduce vibration
• Extend track chain service life
• Protect sprocket and idler components
• Reduce unexpected downtime

Every roller produced by our factory undergoes strict inspection:

• Raw material inspection
• Heat treatment verification
• Dimensional accuracy checking
• Seal performance testing

With professional manufacturing capability for excavator undercarriage parts, we provide OEM-compatible replacement solutions with stable quality, competitive pricing and warranty support.

Contact us with your machine model, serial number, OEM part number and roller position to confirm the correct replacement.