Product Overview

The Carrier Roller, also called Top Roller or Upper Roller, is installed on the upper frame of the crawler undercarriage system.

For Komatsu D85ESS-2A bulldozers, the carrier roller supports the weight of the upper track chain, maintains correct chain movement and helps reduce friction between the track chain and frame.

During bulldozer operation, carrier rollers are exposed to:

• Continuous track chain movement
• Heavy vibration
• Dust and mud contamination
• Uneven working conditions
• Long-hour earthmoving operations

A worn carrier roller may cause:

• Track chain vibration
• Increased travelling resistance
• Abnormal noise
• Accelerated track link wear
• Reduced undercarriage service life

Our D85ESS-2A carrier rollers are manufactured with professional bulldozer undercarriage production technology, providing reliable aftermarket replacement solutions for dealers, repair workshops and fleet operators.

Key Features & Benefits

Heavy-Duty Application

Designed for:

• Komatsu D85ESS-2
• Komatsu D85ESS-2A

Suitable for:

• Construction projects
• Mining operations
• Earthmoving applications

High Strength Alloy Steel

Manufactured from:

40Mn2 Alloy Steel

Benefits:

• High structural strength
• Excellent impact resistance
• Good fatigue resistance
• Long operating life

Precision Heat Treatment

The roller surface is heat treated to improve wear resistance.

Specifications:

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

Suitable for:

• Rock
• Gravel
• Hard soil
• Heavy-duty pushing operations

Reliable Sealing System

Equipped with:

• Heavy-duty floating oil seals
• Wear-resistant bushings
• Lifetime lubrication system

Designed to protect internal components from:

• Dust
• Mud
• Water contamination

OEM-Style Replacement

Manufactured according to OEM-style dimensions:

• Correct mounting size
• Accurate shaft dimensions
• Proper roller diameter

Provides direct replacement without modification.

Technical Specifications